Upgrade xorm to v1.0.3 (#12210)

Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

47 files changed, 2044 insertions, 1717 deletions

diff --git a/vendor/github.com/PuerkitoBio/goquery/.travis.yml b/vendor/github.com/PuerkitoBio/goquery/.travis.yml
index cc1402d5cf..27c3ce8136 100644
--- a/vendor/github.com/PuerkitoBio/goquery/.travis.yml
+++ b/vendor/github.com/PuerkitoBio/goquery/.travis.yml
@@ -1,7 +1,6 @@
 language: go
 
 go:
-    - 1.1
     - 1.2.x
     - 1.3.x
     - 1.4.x
@@ -10,7 +9,9 @@ go:
     - 1.7.x
     - 1.8.x
     - 1.9.x
-    - "1.10.x"
+    - 1.10.x
     - 1.11.x
+    - 1.12.x
+    - 1.13.x
     - tip
 
diff --git a/vendor/github.com/PuerkitoBio/goquery/README.md b/vendor/github.com/PuerkitoBio/goquery/README.md
index 84f9af39e3..0bc221d163 100644
--- a/vendor/github.com/PuerkitoBio/goquery/README.md
+++ b/vendor/github.com/PuerkitoBio/goquery/README.md
@@ -37,6 +37,7 @@ Please note that because of the net/html dependency, goquery requires Go1.1+.
 
 **Note that goquery's API is now stable, and will not break.**
 
+*    **2020-02-04 (v1.5.1)** : Update module dependencies.
 *    **2018-11-15 (v1.5.0)** : Go module support (thanks @Zaba505).
 *    **2018-06-07 (v1.4.1)** : Add `NewDocumentFromReader` examples.
 *    **2018-03-24 (v1.4.0)** : Deprecate `NewDocument(url)` and `NewDocumentFromResponse(response)`.
@@ -138,9 +139,12 @@ func main() {
 - [Goq][goq], an HTML deserialization and scraping library based on goquery and struct tags.
 - [andybalholm/cascadia][cascadia], the CSS selector library used by goquery.
 - [suntong/cascadia][cascadiacli], a command-line interface to the cascadia CSS selector library, useful to test selectors.
-- [asciimoo/colly](https://github.com/asciimoo/colly), a lightning fast and elegant Scraping Framework
+- [gocolly/colly](https://github.com/gocolly/colly), a lightning fast and elegant Scraping Framework
 - [gnulnx/goperf](https://github.com/gnulnx/goperf), a website performance test tool that also fetches static assets.
 - [MontFerret/ferret](https://github.com/MontFerret/ferret), declarative web scraping.
+- [tacusci/berrycms](https://github.com/tacusci/berrycms), a modern simple to use CMS with easy to write plugins
+- [Dataflow kit](https://github.com/slotix/dataflowkit), Web Scraping framework for Gophers.  
+- [Geziyor](https://github.com/geziyor/geziyor), a fast web crawling & scraping framework for Go. Supports JS rendering.
 
 ## Support
 
diff --git a/vendor/github.com/PuerkitoBio/goquery/go.mod b/vendor/github.com/PuerkitoBio/goquery/go.mod
index 2fa1332a58..95826ad366 100644
--- a/vendor/github.com/PuerkitoBio/goquery/go.mod
+++ b/vendor/github.com/PuerkitoBio/goquery/go.mod
@@ -1,6 +1,8 @@
 module github.com/PuerkitoBio/goquery
 
 require (
-	github.com/andybalholm/cascadia v1.0.0
-	golang.org/x/net v0.0.0-20181114220301-adae6a3d119a
+	github.com/andybalholm/cascadia v1.1.0
+	golang.org/x/net v0.0.0-20200202094626-16171245cfb2
 )
+
+go 1.13
diff --git a/vendor/github.com/PuerkitoBio/goquery/go.sum b/vendor/github.com/PuerkitoBio/goquery/go.sum
index 11c5757546..bc79107e59 100644
--- a/vendor/github.com/PuerkitoBio/goquery/go.sum
+++ b/vendor/github.com/PuerkitoBio/goquery/go.sum
@@ -1,5 +1,8 @@
-github.com/andybalholm/cascadia v1.0.0 h1:hOCXnnZ5A+3eVDX8pvgl4kofXv2ELss0bKcqRySc45o=
-github.com/andybalholm/cascadia v1.0.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
+github.com/andybalholm/cascadia v1.1.0 h1:BuuO6sSfQNFRu1LppgbD25Hr2vLYW25JvxHs5zzsLTo=
+github.com/andybalholm/cascadia v1.1.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/net v0.0.0-20180218175443-cbe0f9307d01/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20181114220301-adae6a3d119a h1:gOpx8G595UYyvj8UK4+OFyY4rx037g3fmfhe5SasG3U=
-golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20200202094626-16171245cfb2 h1:CCH4IOTTfewWjGOlSp+zGcjutRKlBEZQ6wTn8ozI/nI=
+golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
diff --git a/vendor/github.com/andybalholm/cascadia/README.md b/vendor/github.com/andybalholm/cascadia/README.md
index 9021cb92aa..26f4c37b36 100644
--- a/vendor/github.com/andybalholm/cascadia/README.md
+++ b/vendor/github.com/andybalholm/cascadia/README.md
@@ -5,3 +5,5 @@
 The Cascadia package implements CSS selectors for use with the parse trees produced by the html package.
 
 To test CSS selectors without writing Go code, check out [cascadia](https://github.com/suntong/cascadia) the command line tool, a thin wrapper around this package.
+
+[Refer to godoc here](https://godoc.org/github.com/andybalholm/cascadia).
diff --git a/vendor/github.com/andybalholm/cascadia/parser.go b/vendor/github.com/andybalholm/cascadia/parser.go
index 495db9ccfc..4f8810e3ef 100644
--- a/vendor/github.com/andybalholm/cascadia/parser.go
+++ b/vendor/github.com/andybalholm/cascadia/parser.go
@@ -7,8 +7,6 @@ import (
 	"regexp"
 	"strconv"
 	"strings"
-
-	"golang.org/x/net/html"
 )
 
 // a parser for CSS selectors
@@ -56,6 +54,26 @@ func (p *parser) parseEscape() (result string, err error) {
 	return result, nil
 }
 
+// toLowerASCII returns s with all ASCII capital letters lowercased.
+func toLowerASCII(s string) string {
+	var b []byte
+	for i := 0; i < len(s); i++ {
+		if c := s[i]; 'A' <= c && c <= 'Z' {
+			if b == nil {
+				b = make([]byte, len(s))
+				copy(b, s)
+			}
+			b[i] = s[i] + ('a' - 'A')
+		}
+	}
+
+	if b == nil {
+		return s
+	}
+
+	return string(b)
+}
+
 func hexDigit(c byte) bool {
 	return '0' <= c && c <= '9' || 'a' <= c && c <= 'f' || 'A' <= c && c <= 'F'
 }
@@ -280,92 +298,92 @@ func (p *parser) consumeClosingParenthesis() bool {
 }
 
 // parseTypeSelector parses a type selector (one that matches by tag name).
-func (p *parser) parseTypeSelector() (result Selector, err error) {
+func (p *parser) parseTypeSelector() (result tagSelector, err error) {
 	tag, err := p.parseIdentifier()
 	if err != nil {
-		return nil, err
+		return
 	}
-
-	return typeSelector(tag), nil
+	return tagSelector{tag: toLowerASCII(tag)}, nil
 }
 
 // parseIDSelector parses a selector that matches by id attribute.
-func (p *parser) parseIDSelector() (Selector, error) {
+func (p *parser) parseIDSelector() (idSelector, error) {
 	if p.i >= len(p.s) {
-		return nil, fmt.Errorf("expected id selector (#id), found EOF instead")
+		return idSelector{}, fmt.Errorf("expected id selector (#id), found EOF instead")
 	}
 	if p.s[p.i] != '#' {
-		return nil, fmt.Errorf("expected id selector (#id), found '%c' instead", p.s[p.i])
+		return idSelector{}, fmt.Errorf("expected id selector (#id), found '%c' instead", p.s[p.i])
 	}
 
 	p.i++
 	id, err := p.parseName()
 	if err != nil {
-		return nil, err
+		return idSelector{}, err
 	}
 
-	return attributeEqualsSelector("id", id), nil
+	return idSelector{id: id}, nil
 }
 
 // parseClassSelector parses a selector that matches by class attribute.
-func (p *parser) parseClassSelector() (Selector, error) {
+func (p *parser) parseClassSelector() (classSelector, error) {
 	if p.i >= len(p.s) {
-		return nil, fmt.Errorf("expected class selector (.class), found EOF instead")
+		return classSelector{}, fmt.Errorf("expected class selector (.class), found EOF instead")
 	}
 	if p.s[p.i] != '.' {
-		return nil, fmt.Errorf("expected class selector (.class), found '%c' instead", p.s[p.i])
+		return classSelector{}, fmt.Errorf("expected class selector (.class), found '%c' instead", p.s[p.i])
 	}
 
 	p.i++
 	class, err := p.parseIdentifier()
 	if err != nil {
-		return nil, err
+		return classSelector{}, err
 	}
 
-	return attributeIncludesSelector("class", class), nil
+	return classSelector{class: class}, nil
 }
 
 // parseAttributeSelector parses a selector that matches by attribute value.
-func (p *parser) parseAttributeSelector() (Selector, error) {
+func (p *parser) parseAttributeSelector() (attrSelector, error) {
 	if p.i >= len(p.s) {
-		return nil, fmt.Errorf("expected attribute selector ([attribute]), found EOF instead")
+		return attrSelector{}, fmt.Errorf("expected attribute selector ([attribute]), found EOF instead")
 	}
 	if p.s[p.i] != '[' {
-		return nil, fmt.Errorf("expected attribute selector ([attribute]), found '%c' instead", p.s[p.i])
+		return attrSelector{}, fmt.Errorf("expected attribute selector ([attribute]), found '%c' instead", p.s[p.i])
 	}
 
 	p.i++
 	p.skipWhitespace()
 	key, err := p.parseIdentifier()
 	if err != nil {
-		return nil, err
+		return attrSelector{}, err
 	}
+	key = toLowerASCII(key)
 
 	p.skipWhitespace()
 	if p.i >= len(p.s) {
-		return nil, errors.New("unexpected EOF in attribute selector")
+		return attrSelector{}, errors.New("unexpected EOF in attribute selector")
 	}
 
 	if p.s[p.i] == ']' {
 		p.i++
-		return attributeExistsSelector(key), nil
+		return attrSelector{key: key, operation: ""}, nil
 	}
 
 	if p.i+2 >= len(p.s) {
-		return nil, errors.New("unexpected EOF in attribute selector")
+		return attrSelector{}, errors.New("unexpected EOF in attribute selector")
 	}
 
 	op := p.s[p.i : p.i+2]
 	if op[0] == '=' {
 		op = "="
 	} else if op[1] != '=' {
-		return nil, fmt.Errorf(`expected equality operator, found "%s" instead`, op)
+		return attrSelector{}, fmt.Errorf(`expected equality operator, found "%s" instead`, op)
 	}
 	p.i += len(op)
 
 	p.skipWhitespace()
 	if p.i >= len(p.s) {
-		return nil, errors.New("unexpected EOF in attribute selector")
+		return attrSelector{}, errors.New("unexpected EOF in attribute selector")
 	}
 	var val string
 	var rx *regexp.Regexp
@@ -380,46 +398,32 @@ func (p *parser) parseAttributeSelector() (Selector, error) {
 		}
 	}
 	if err != nil {
-		return nil, err
+		return attrSelector{}, err
 	}
 
 	p.skipWhitespace()
 	if p.i >= len(p.s) {
-		return nil, errors.New("unexpected EOF in attribute selector")
+		return attrSelector{}, errors.New("unexpected EOF in attribute selector")
 	}
 	if p.s[p.i] != ']' {
-		return nil, fmt.Errorf("expected ']', found '%c' instead", p.s[p.i])
+		return attrSelector{}, fmt.Errorf("expected ']', found '%c' instead", p.s[p.i])
 	}
 	p.i++
 
 	switch op {
-	case "=":
-		return attributeEqualsSelector(key, val), nil
-	case "!=":
-		return attributeNotEqualSelector(key, val), nil
-	case "~=":
-		return attributeIncludesSelector(key, val), nil
-	case "|=":
-		return attributeDashmatchSelector(key, val), nil
-	case "^=":
-		return attributePrefixSelector(key, val), nil
-	case "$=":
-		return attributeSuffixSelector(key, val), nil
-	case "*=":
-		return attributeSubstringSelector(key, val), nil
-	case "#=":
-		return attributeRegexSelector(key, rx), nil
-	}
-
-	return nil, fmt.Errorf("attribute operator %q is not supported", op)
+	case "=", "!=", "~=", "|=", "^=", "$=", "*=", "#=":
+		return attrSelector{key: key, val: val, operation: op, regexp: rx}, nil
+	default:
+		return attrSelector{}, fmt.Errorf("attribute operator %q is not supported", op)
+	}
 }
 
 var errExpectedParenthesis = errors.New("expected '(' but didn't find it")
 var errExpectedClosingParenthesis = errors.New("expected ')' but didn't find it")
 var errUnmatchedParenthesis = errors.New("unmatched '('")
 
-// parsePseudoclassSelector parses a pseudoclass selector like :not(p).
-func (p *parser) parsePseudoclassSelector() (Selector, error) {
+// parsePseudoclassSelector parses a pseudoclass selector like :not(p)
+func (p *parser) parsePseudoclassSelector() (out Sel, err error) {
 	if p.i >= len(p.s) {
 		return nil, fmt.Errorf("expected pseudoclass selector (:pseudoclass), found EOF instead")
 	}
@@ -428,40 +432,36 @@ func (p *parser) parsePseudoclassSelector() (Selector, error) {
 	}
 
 	p.i++
+	if p.s[p.i] == ':' { // we found a pseudo-element
+		p.i++
+	}
+
 	name, err := p.parseIdentifier()
 	if err != nil {
-		return nil, err
+		return
 	}
 	name = toLowerASCII(name)
-
 	switch name {
 	case "not", "has", "haschild":
 		if !p.consumeParenthesis() {
-			return nil, errExpectedParenthesis
+			return out, errExpectedParenthesis
 		}
 		sel, parseErr := p.parseSelectorGroup()
 		if parseErr != nil {
-			return nil, parseErr
+			return out, parseErr
 		}
 		if !p.consumeClosingParenthesis() {
-			return nil, errExpectedClosingParenthesis
+			return out, errExpectedClosingParenthesis
 		}
 
-		switch name {
-		case "not":
-			return negatedSelector(sel), nil
-		case "has":
-			return hasDescendantSelector(sel), nil
-		case "haschild":
-			return hasChildSelector(sel), nil
-		}
+		out = relativePseudoClassSelector{name: name, match: sel}
 
 	case "contains", "containsown":
 		if !p.consumeParenthesis() {
-			return nil, errExpectedParenthesis
+			return out, errExpectedParenthesis
 		}
 		if p.i == len(p.s) {
-			return nil, errUnmatchedParenthesis
+			return out, errUnmatchedParenthesis
 		}
 		var val string
 		switch p.s[p.i] {
@@ -471,95 +471,75 @@ func (p *parser) parsePseudoclassSelector() (Selector, error) {
 			val, err = p.parseIdentifier()
 		}
 		if err != nil {
-			return nil, err
+			return out, err
 		}
 		val = strings.ToLower(val)
 		p.skipWhitespace()
 		if p.i >= len(p.s) {
-			return nil, errors.New("unexpected EOF in pseudo selector")
+			return out, errors.New("unexpected EOF in pseudo selector")
 		}
 		if !p.consumeClosingParenthesis() {
-			return nil, errExpectedClosingParenthesis
+			return out, errExpectedClosingParenthesis
 		}
 
-		switch name {
-		case "contains":
-			return textSubstrSelector(val), nil
-		case "containsown":
-			return ownTextSubstrSelector(val), nil
-		}
+		out = containsPseudoClassSelector{own: name == "containsown", value: val}
 
 	case "matches", "matchesown":
 		if !p.consumeParenthesis() {
-			return nil, errExpectedParenthesis
+			return out, errExpectedParenthesis
 		}
 		rx, err := p.parseRegex()
 		if err != nil {
-			return nil, err
+			return out, err
 		}
 		if p.i >= len(p.s) {
-			return nil, errors.New("unexpected EOF in pseudo selector")
+			return out, errors.New("unexpected EOF in pseudo selector")
 		}
 		if !p.consumeClosingParenthesis() {
-			return nil, errExpectedClosingParenthesis
+			return out, errExpectedClosingParenthesis
 		}
 
-		switch name {
-		case "matches":
-			return textRegexSelector(rx), nil
-		case "matchesown":
-			return ownTextRegexSelector(rx), nil
-		}
+		out = regexpPseudoClassSelector{own: name == "matchesown", regexp: rx}
 
 	case "nth-child", "nth-last-child", "nth-of-type", "nth-last-of-type":
 		if !p.consumeParenthesis() {
-			return nil, errExpectedParenthesis
+			return out, errExpectedParenthesis
 		}
 		a, b, err := p.parseNth()
 		if err != nil {
-			return nil, err
+			return out, err
 		}
 		if !p.consumeClosingParenthesis() {
-			return nil, errExpectedClosingParenthesis
-		}
-		if a == 0 {
-			switch name {
-			case "nth-child":
-				return simpleNthChildSelector(b, false), nil
-			case "nth-of-type":
-				return simpleNthChildSelector(b, true), nil
-			case "nth-last-child":
-				return simpleNthLastChildSelector(b, false), nil
-			case "nth-last-of-type":
-				return simpleNthLastChildSelector(b, true), nil
-			}
+			return out, errExpectedClosingParenthesis
 		}
-		return nthChildSelector(a, b,
-				name == "nth-last-child" || name == "nth-last-of-type",
-				name == "nth-of-type" || name == "nth-last-of-type"),
-			nil
+		last := name == "nth-last-child" || name == "nth-last-of-type"
+		ofType := name == "nth-of-type" || name == "nth-last-of-type"
+		out = nthPseudoClassSelector{a: a, b: b, last: last, ofType: ofType}
 
 	case "first-child":
-		return simpleNthChildSelector(1, false), nil
+		out = nthPseudoClassSelector{a: 0, b: 1, ofType: false, last: false}
 	case "last-child":
-		return simpleNthLastChildSelector(1, false), nil
+		out = nthPseudoClassSelector{a: 0, b: 1, ofType: false, last: true}
 	case "first-of-type":
-		return simpleNthChildSelector(1, true), nil
+		out = nthPseudoClassSelector{a: 0, b: 1, ofType: true, last: false}
 	case "last-of-type":
-		return simpleNthLastChildSelector(1, true), nil
+		out = nthPseudoClassSelector{a: 0, b: 1, ofType: true, last: true}
 	case "only-child":
-		return onlyChildSelector(false), nil
+		out = onlyChildPseudoClassSelector{ofType: false}
 	case "only-of-type":
-		return onlyChildSelector(true), nil
+		out = onlyChildPseudoClassSelector{ofType: true}
 	case "input":
-		return inputSelector, nil
+		out = inputPseudoClassSelector{}
 	case "empty":
-		return emptyElementSelector, nil
+		out = emptyElementPseudoClassSelector{}
 	case "root":
-		return rootSelector, nil
+		out = rootPseudoClassSelector{}
+	case "after", "backdrop", "before", "cue", "first-letter", "first-line", "grammar-error", "marker", "placeholder", "selection", "spelling-error":
+		return out, errors.New("pseudo-elements are not yet supported")
+	default:
+		return out, fmt.Errorf("unknown pseudoclass or pseudoelement :%s", name)
 	}
-
-	return nil, fmt.Errorf("unknown pseudoclass :%s", name)
+	return
 }
 
 // parseInteger parses a  decimal integer.
@@ -705,8 +685,8 @@ invalid:
 
 // parseSimpleSelectorSequence parses a selector sequence that applies to
 // a single element.
-func (p *parser) parseSimpleSelectorSequence() (Selector, error) {
-	var result Selector
+func (p *parser) parseSimpleSelectorSequence() (Sel, error) {
+	var selectors []Sel
 
 	if p.i >= len(p.s) {
 		return nil, errors.New("expected selector, found EOF instead")
@@ -723,13 +703,15 @@ func (p *parser) parseSimpleSelectorSequence() (Selector, error) {
 		if err != nil {
 			return nil, err
 		}
-		result = r
+		selectors = append(selectors, r)
 	}
 
 loop:
 	for p.i < len(p.s) {
-		var ns Selector
-		var err error
+		var (
+			ns  Sel
+			err error
+		)
 		switch p.s[p.i] {
 		case '#':
 			ns, err = p.parseIDSelector()
@@ -745,37 +727,33 @@ loop:
 		if err != nil {
 			return nil, err
 		}
-		if result == nil {
-			result = ns
-		} else {
-			result = intersectionSelector(result, ns)
-		}
-	}
 
-	if result == nil {
-		result = func(n *html.Node) bool {
-			return n.Type == html.ElementNode
-		}
+		selectors = append(selectors, ns)
 	}
-
-	return result, nil
+	if len(selectors) == 1 { // no need wrap the selectors in compoundSelector
+		return selectors[0], nil
+	}
+	return compoundSelector{selectors: selectors}, nil
 }
 
 // parseSelector parses a selector that may include combinators.
-func (p *parser) parseSelector() (result Selector, err error) {
+func (p *parser) parseSelector() (Sel, error) {
 	p.skipWhitespace()
-	result, err = p.parseSimpleSelectorSequence()
+	result, err := p.parseSimpleSelectorSequence()
 	if err != nil {
-		return
+		return nil, err
 	}
 
 	for {
-		var combinator byte
+		var (
+			combinator byte
+			c          Sel
+		)
 		if p.skipWhitespace() {
 			combinator = ' '
 		}
 		if p.i >= len(p.s) {
-			return
+			return result, nil
 		}
 
 		switch p.s[p.i] {
@@ -785,51 +763,39 @@ func (p *parser) parseSelector() (result Selector, err error) {
 			p.skipWhitespace()
 		case ',', ')':
 			// These characters can't begin a selector, but they can legally occur after one.
-			return
+			return result, nil
 		}
 
 		if combinator == 0 {
-			return
+			return result, nil
 		}
 
-		c, err := p.parseSimpleSelectorSequence()
+		c, err = p.parseSimpleSelectorSequence()
 		if err != nil {
 			return nil, err
 		}
-
-		switch combinator {
-		case ' ':
-			result = descendantSelector(result, c)
-		case '>':
-			result = childSelector(result, c)
-		case '+':
-			result = siblingSelector(result, c, true)
-		case '~':
-			result = siblingSelector(result, c, false)
-		}
+		result = combinedSelector{first: result, combinator: combinator, second: c}
 	}
-
-	panic("unreachable")
 }
 
 // parseSelectorGroup parses a group of selectors, separated by commas.
-func (p *parser) parseSelectorGroup() (result Selector, err error) {
-	result, err = p.parseSelector()
+func (p *parser) parseSelectorGroup() (SelectorGroup, error) {
+	current, err := p.parseSelector()
 	if err != nil {
-		return
+		return nil, err
 	}
+	result := SelectorGroup{current}
 
 	for p.i < len(p.s) {
 		if p.s[p.i] != ',' {
-			return result, nil
+			break
 		}
 		p.i++
 		c, err := p.parseSelector()
 		if err != nil {
 			return nil, err
 		}
-		result = unionSelector(result, c)
+		result = append(result, c)
 	}
-
-	return
+	return result, nil
 }
diff --git a/vendor/github.com/andybalholm/cascadia/selector.go b/vendor/github.com/andybalholm/cascadia/selector.go
index 9fb05ccb77..18ce116440 100644
--- a/vendor/github.com/andybalholm/cascadia/selector.go
+++ b/vendor/github.com/andybalholm/cascadia/selector.go
@@ -9,36 +9,37 @@ import (
 	"golang.org/x/net/html"
 )
 
-// the Selector type, and functions for creating them
+// Matcher is the interface for basic selector functionality.
+// Match returns whether a selector matches n.
+type Matcher interface {
+	Match(n *html.Node) bool
+}
 
-// A Selector is a function which tells whether a node matches or not.
-type Selector func(*html.Node) bool
+// Sel is the interface for all the functionality provided by selectors.
+// It is currently the same as Matcher, but other methods may be added in the
+// future.
+type Sel interface {
+	Matcher
+	Specificity() Specificity
+}
 
-// hasChildMatch returns whether n has any child that matches a.
-func hasChildMatch(n *html.Node, a Selector) bool {
-	for c := n.FirstChild; c != nil; c = c.NextSibling {
-		if a(c) {
-			return true
-		}
+// Parse parses a selector.
+func Parse(sel string) (Sel, error) {
+	p := &parser{s: sel}
+	compiled, err := p.parseSelector()
+	if err != nil {
+		return nil, err
 	}
-	return false
-}
 
-// hasDescendantMatch performs a depth-first search of n's descendants,
-// testing whether any of them match a. It returns true as soon as a match is
-// found, or false if no match is found.
-func hasDescendantMatch(n *html.Node, a Selector) bool {
-	for c := n.FirstChild; c != nil; c = c.NextSibling {
-		if a(c) || (c.Type == html.ElementNode && hasDescendantMatch(c, a)) {
-			return true
-		}
+	if p.i < len(sel) {
+		return nil, fmt.Errorf("parsing %q: %d bytes left over", sel, len(sel)-p.i)
 	}
-	return false
+
+	return compiled, nil
 }
 
-// Compile parses a selector and returns, if successful, a Selector object
-// that can be used to match against html.Node objects.
-func Compile(sel string) (Selector, error) {
+// ParseGroup parses a selector, or a group of selectors separated by commas.
+func ParseGroup(sel string) (SelectorGroup, error) {
 	p := &parser{s: sel}
 	compiled, err := p.parseSelectorGroup()
 	if err != nil {
@@ -52,6 +53,23 @@ func Compile(sel string) (Selector, error) {
 	return compiled, nil
 }
 
+// A Selector is a function which tells whether a node matches or not.
+//
+// This type is maintained for compatibility; I recommend using the newer and
+// more idiomatic interfaces Sel and Matcher.
+type Selector func(*html.Node) bool
+
+// Compile parses a selector and returns, if successful, a Selector object
+// that can be used to match against html.Node objects.
+func Compile(sel string) (Selector, error) {
+	compiled, err := ParseGroup(sel)
+	if err != nil {
+		return nil, err
+	}
+
+	return Selector(compiled.Match), nil
+}
+
 // MustCompile is like Compile, but panics instead of returning an error.
 func MustCompile(sel string) Selector {
 	compiled, err := Compile(sel)
@@ -79,6 +97,23 @@ func (s Selector) matchAllInto(n *html.Node, storage []*html.Node) []*html.Node
 	return storage
 }
 
+func queryInto(n *html.Node, m Matcher, storage []*html.Node) []*html.Node {
+	for child := n.FirstChild; child != nil; child = child.NextSibling {
+		if m.Match(child) {
+			storage = append(storage, child)
+		}
+		storage = queryInto(child, m, storage)
+	}
+
+	return storage
+}
+
+// QueryAll returns a slice of all the nodes that match m, from the descendants
+// of n.
+func QueryAll(n *html.Node, m Matcher) []*html.Node {
+	return queryInto(n, m, nil)
+}
+
 // Match returns true if the node matches the selector.
 func (s Selector) Match(n *html.Node) bool {
 	return s(n)
@@ -99,6 +134,21 @@ func (s Selector) MatchFirst(n *html.Node) *html.Node {
 	return nil
 }
 
+// Query returns the first node that matches m, from the descendants of n.
+// If none matches, it returns nil.
+func Query(n *html.Node, m Matcher) *html.Node {
+	for c := n.FirstChild; c != nil; c = c.NextSibling {
+		if m.Match(c) {
+			return c
+		}
+		if matched := Query(c, m); matched != nil {
+			return matched
+		}
+	}
+
+	return nil
+}
+
 // Filter returns the nodes in nodes that match the selector.
 func (s Selector) Filter(nodes []*html.Node) (result []*html.Node) {
 	for _, n := range nodes {
@@ -109,106 +159,136 @@ func (s Selector) Filter(nodes []*html.Node) (result []*html.Node) {
 	return result
 }
 
-// typeSelector returns a Selector that matches elements with a given tag name.
-func typeSelector(tag string) Selector {
-	tag = toLowerASCII(tag)
-	return func(n *html.Node) bool {
-		return n.Type == html.ElementNode && n.Data == tag
+// Filter returns the nodes that match m.
+func Filter(nodes []*html.Node, m Matcher) (result []*html.Node) {
+	for _, n := range nodes {
+		if m.Match(n) {
+			result = append(result, n)
+		}
 	}
+	return result
 }
 
-// toLowerASCII returns s with all ASCII capital letters lowercased.
-func toLowerASCII(s string) string {
-	var b []byte
-	for i := 0; i < len(s); i++ {
-		if c := s[i]; 'A' <= c && c <= 'Z' {
-			if b == nil {
-				b = make([]byte, len(s))
-				copy(b, s)
-			}
-			b[i] = s[i] + ('a' - 'A')
-		}
-	}
+type tagSelector struct {
+	tag string
+}
 
-	if b == nil {
-		return s
-	}
+// Matches elements with a given tag name.
+func (t tagSelector) Match(n *html.Node) bool {
+	return n.Type == html.ElementNode && n.Data == t.tag
+}
 
-	return string(b)
+func (c tagSelector) Specificity() Specificity {
+	return Specificity{0, 0, 1}
 }
 
-// attributeSelector returns a Selector that matches elements
-// where the attribute named key satisifes the function f.
-func attributeSelector(key string, f func(string) bool) Selector {
-	key = toLowerASCII(key)
-	return func(n *html.Node) bool {
-		if n.Type != html.ElementNode {
-			return false
-		}
-		for _, a := range n.Attr {
-			if a.Key == key && f(a.Val) {
-				return true
-			}
-		}
-		return false
-	}
+type classSelector struct {
+	class string
 }
 
-// attributeExistsSelector returns a Selector that matches elements that have
-// an attribute named key.
-func attributeExistsSelector(key string) Selector {
-	return attributeSelector(key, func(string) bool { return true })
+// Matches elements by class attribute.
+func (t classSelector) Match(n *html.Node) bool {
+	return matchAttribute(n, "class", func(s string) bool {
+		return matchInclude(t.class, s)
+	})
 }
 
-// attributeEqualsSelector returns a Selector that matches elements where
-// the attribute named key has the value val.
-func attributeEqualsSelector(key, val string) Selector {
-	return attributeSelector(key,
-		func(s string) bool {
-			return s == val
-		})
+func (c classSelector) Specificity() Specificity {
+	return Specificity{0, 1, 0}
+}
+
+type idSelector struct {
+	id string
+}
+
+// Matches elements by id attribute.
+func (t idSelector) Match(n *html.Node) bool {
+	return matchAttribute(n, "id", func(s string) bool {
+		return s == t.id
+	})
+}
+
+func (c idSelector) Specificity() Specificity {
+	return Specificity{1, 0, 0}
+}
+
+type attrSelector struct {
+	key, val, operation string
+	regexp              *regexp.Regexp
+}
+
+// Matches elements by attribute value.
+func (t attrSelector) Match(n *html.Node) bool {
+	switch t.operation {
+	case "":
+		return matchAttribute(n, t.key, func(string) bool { return true })
+	case "=":
+		return matchAttribute(n, t.key, func(s string) bool { return s == t.val })
+	case "!=":
+		return attributeNotEqualMatch(t.key, t.val, n)
+	case "~=":
+		// matches elements where the attribute named key is a whitespace-separated list that includes val.
+		return matchAttribute(n, t.key, func(s string) bool { return matchInclude(t.val, s) })
+	case "|=":
+		return attributeDashMatch(t.key, t.val, n)
+	case "^=":
+		return attributePrefixMatch(t.key, t.val, n)
+	case "$=":
+		return attributeSuffixMatch(t.key, t.val, n)
+	case "*=":
+		return attributeSubstringMatch(t.key, t.val, n)
+	case "#=":
+		return attributeRegexMatch(t.key, t.regexp, n)
+	default:
+		panic(fmt.Sprintf("unsuported operation : %s", t.operation))
+	}
 }
 
-// attributeNotEqualSelector returns a Selector that matches elements where
+// matches elements where the attribute named key satisifes the function f.
+func matchAttribute(n *html.Node, key string, f func(string) bool) bool {
+	if n.Type != html.ElementNode {
+		return false
+	}
+	for _, a := range n.Attr {
+		if a.Key == key && f(a.Val) {
+			return true
+		}
+	}
+	return false
+}
+
+// attributeNotEqualMatch matches elements where
 // the attribute named key does not have the value val.
-func attributeNotEqualSelector(key, val string) Selector {
-	key = toLowerASCII(key)
-	return func(n *html.Node) bool {
-		if n.Type != html.ElementNode {
+func attributeNotEqualMatch(key, val string, n *html.Node) bool {
+	if n.Type != html.ElementNode {
+		return false
+	}
+	for _, a := range n.Attr {
+		if a.Key == key && a.Val == val {
 			return false
 		}
-		for _, a := range n.Attr {
-			if a.Key == key && a.Val == val {
-				return false
-			}
-		}
-		return true
 	}
+	return true
 }
 
-// attributeIncludesSelector returns a Selector that matches elements where
-// the attribute named key is a whitespace-separated list that includes val.
-func attributeIncludesSelector(key, val string) Selector {
-	return attributeSelector(key,
-		func(s string) bool {
-			for s != "" {
-				i := strings.IndexAny(s, " \t\r\n\f")
-				if i == -1 {
-					return s == val
-				}
-				if s[:i] == val {
-					return true
-				}
-				s = s[i+1:]
-			}
-			return false
-		})
+// returns true if s is a whitespace-separated list that includes val.
+func matchInclude(val, s string) bool {
+	for s != "" {
+		i := strings.IndexAny(s, " \t\r\n\f")
+		if i == -1 {
+			return s == val
+		}
+		if s[:i] == val {
+			return true
+		}
+		s = s[i+1:]
+	}
+	return false
 }
 
-// attributeDashmatchSelector returns a Selector that matches elements where
-// the attribute named key equals val or starts with val plus a hyphen.
-func attributeDashmatchSelector(key, val string) Selector {
-	return attributeSelector(key,
+//  matches elements where the attribute named key equals val or starts with val plus a hyphen.
+func attributeDashMatch(key, val string, n *html.Node) bool {
+	return matchAttribute(n, key,
 		func(s string) bool {
 			if s == val {
 				return true
@@ -223,10 +303,10 @@ func attributeDashmatchSelector(key, val string) Selector {
 		})
 }
 
-// attributePrefixSelector returns a Selector that matches elements where
+// attributePrefixMatch returns a Selector that matches elements where
 // the attribute named key starts with val.
-func attributePrefixSelector(key, val string) Selector {
-	return attributeSelector(key,
+func attributePrefixMatch(key, val string, n *html.Node) bool {
+	return matchAttribute(n, key,
 		func(s string) bool {
 			if strings.TrimSpace(s) == "" {
 				return false
@@ -235,10 +315,10 @@ func attributePrefixSelector(key, val string) Selector {
 		})
 }
 
-// attributeSuffixSelector returns a Selector that matches elements where
+// attributeSuffixMatch matches elements where
 // the attribute named key ends with val.
-func attributeSuffixSelector(key, val string) Selector {
-	return attributeSelector(key,
+func attributeSuffixMatch(key, val string, n *html.Node) bool {
+	return matchAttribute(n, key,
 		func(s string) bool {
 			if strings.TrimSpace(s) == "" {
 				return false
@@ -247,10 +327,10 @@ func attributeSuffixSelector(key, val string) Selector {
 		})
 }
 
-// attributeSubstringSelector returns a Selector that matches nodes where
+// attributeSubstringMatch matches nodes where
 // the attribute named key contains val.
-func attributeSubstringSelector(key, val string) Selector {
-	return attributeSelector(key,
+func attributeSubstringMatch(key, val string, n *html.Node) bool {
+	return matchAttribute(n, key,
 		func(s string) bool {
 			if strings.TrimSpace(s) == "" {
 				return false
@@ -259,39 +339,118 @@ func attributeSubstringSelector(key, val string) Selector {
 		})
 }
 
-// attributeRegexSelector returns a Selector that matches nodes where
+// attributeRegexMatch  matches nodes where
 // the attribute named key matches the regular expression rx
-func attributeRegexSelector(key string, rx *regexp.Regexp) Selector {
-	return attributeSelector(key,
+func attributeRegexMatch(key string, rx *regexp.Regexp, n *html.Node) bool {
+	return matchAttribute(n, key,
 		func(s string) bool {
 			return rx.MatchString(s)
 		})
 }
 
-// intersectionSelector returns a selector that matches nodes that match
-// both a and b.
-func intersectionSelector(a, b Selector) Selector {
-	return func(n *html.Node) bool {
-		return a(n) && b(n)
+func (c attrSelector) Specificity() Specificity {
+	return Specificity{0, 1, 0}
+}
+
+// ---------------- Pseudo class selectors ----------------
+// we use severals concrete types of pseudo-class selectors
+
+type relativePseudoClassSelector struct {
+	name  string // one of "not", "has", "haschild"
+	match SelectorGroup
+}
+
+func (s relativePseudoClassSelector) Match(n *html.Node) bool {
+	if n.Type != html.ElementNode {
+		return false
+	}
+	switch s.name {
+	case "not":
+		// matches elements that do not match a.
+		return !s.match.Match(n)
+	case "has":
+		//  matches elements with any descendant that matches a.
+		return hasDescendantMatch(n, s.match)
+	case "haschild":
+		// matches elements with a child that matches a.
+		return hasChildMatch(n, s.match)
+	default:
+		panic(fmt.Sprintf("unsupported relative pseudo class selector : %s", s.name))
 	}
 }
 
-// unionSelector returns a selector that matches elements that match
-// either a or b.
-func unionSelector(a, b Selector) Selector {
-	return func(n *html.Node) bool {
-		return a(n) || b(n)
+// hasChildMatch returns whether n has any child that matches a.
+func hasChildMatch(n *html.Node, a Matcher) bool {
+	for c := n.FirstChild; c != nil; c = c.NextSibling {
+		if a.Match(c) {
+			return true
+		}
 	}
+	return false
 }
 
-// negatedSelector returns a selector that matches elements that do not match a.
-func negatedSelector(a Selector) Selector {
-	return func(n *html.Node) bool {
-		if n.Type != html.ElementNode {
-			return false
+// hasDescendantMatch performs a depth-first search of n's descendants,
+// testing whether any of them match a. It returns true as soon as a match is
+// found, or false if no match is found.
+func hasDescendantMatch(n *html.Node, a Matcher) bool {
+	for c := n.FirstChild; c != nil; c = c.NextSibling {
+		if a.Match(c) || (c.Type == html.ElementNode && hasDescendantMatch(c, a)) {
+			return true
+		}
+	}
+	return false
+}
+
+// Specificity returns the specificity of the most specific selectors
+// in the pseudo-class arguments.
+// See https://www.w3.org/TR/selectors/#specificity-rules
+func (s relativePseudoClassSelector) Specificity() Specificity {
+	var max Specificity
+	for _, sel := range s.match {
+		newSpe := sel.Specificity()
+		if max.Less(newSpe) {
+			max = newSpe
 		}
-		return !a(n)
 	}
+	return max
+}
+
+type containsPseudoClassSelector struct {
+	own   bool
+	value string
+}
+
+func (s containsPseudoClassSelector) Match(n *html.Node) bool {
+	var text string
+	if s.own {
+		// matches nodes that directly contain the given text
+		text = strings.ToLower(nodeOwnText(n))
+	} else {
+		// matches nodes that contain the given text.
+		text = strings.ToLower(nodeText(n))
+	}
+	return strings.Contains(text, s.value)
+}
+
+func (s containsPseudoClassSelector) Specificity() Specificity {
+	return Specificity{0, 1, 0}
+}
+
+type regexpPseudoClassSelector struct {
+	own    bool
+	regexp *regexp.Regexp
+}
+
+func (s regexpPseudoClassSelector) Match(n *html.Node) bool {
+	var text string
+	if s.own {
+		// matches nodes whose text directly matches the specified regular expression
+		text = nodeOwnText(n)
+	} else {
+		// matches nodes whose text matches the specified regular expression
+		text = nodeText(n)
+	}
+	return s.regexp.MatchString(text)
 }
 
 // writeNodeText writes the text contained in n and its descendants to b.
@@ -325,221 +484,198 @@ func nodeOwnText(n *html.Node) string {
 	return b.String()
 }
 
-// textSubstrSelector returns a selector that matches nodes that
-// contain the given text.
-func textSubstrSelector(val string) Selector {
-	return func(n *html.Node) bool {
-		text := strings.ToLower(nodeText(n))
-		return strings.Contains(text, val)
-	}
+func (s regexpPseudoClassSelector) Specificity() Specificity {
+	return Specificity{0, 1, 0}
 }
 
-// ownTextSubstrSelector returns a selector that matches nodes that
-// directly contain the given text
-func ownTextSubstrSelector(val string) Selector {
-	return func(n *html.Node) bool {
-		text := strings.ToLower(nodeOwnText(n))
-		return strings.Contains(text, val)
-	}
+type nthPseudoClassSelector struct {
+	a, b         int
+	last, ofType bool
 }
 
-// textRegexSelector returns a selector that matches nodes whose text matches
-// the specified regular expression
-func textRegexSelector(rx *regexp.Regexp) Selector {
-	return func(n *html.Node) bool {
-		return rx.MatchString(nodeText(n))
+func (s nthPseudoClassSelector) Match(n *html.Node) bool {
+	if s.a == 0 {
+		if s.last {
+			return simpleNthLastChildMatch(s.b, s.ofType, n)
+		} else {
+			return simpleNthChildMatch(s.b, s.ofType, n)
+		}
 	}
+	return nthChildMatch(s.a, s.b, s.last, s.ofType, n)
 }
 
-// ownTextRegexSelector returns a selector that matches nodes whose text
-// directly matches the specified regular expression
-func ownTextRegexSelector(rx *regexp.Regexp) Selector {
-	return func(n *html.Node) bool {
-		return rx.MatchString(nodeOwnText(n))
+// nthChildMatch implements :nth-child(an+b).
+// If last is true, implements :nth-last-child instead.
+// If ofType is true, implements :nth-of-type instead.
+func nthChildMatch(a, b int, last, ofType bool, n *html.Node) bool {
+	if n.Type != html.ElementNode {
+		return false
 	}
-}
 
-// hasChildSelector returns a selector that matches elements
-// with a child that matches a.
-func hasChildSelector(a Selector) Selector {
-	return func(n *html.Node) bool {
-		if n.Type != html.ElementNode {
-			return false
-		}
-		return hasChildMatch(n, a)
+	parent := n.Parent
+	if parent == nil {
+		return false
 	}
-}
 
-// hasDescendantSelector returns a selector that matches elements
-// with any descendant that matches a.
-func hasDescendantSelector(a Selector) Selector {
-	return func(n *html.Node) bool {
-		if n.Type != html.ElementNode {
-			return false
+	if parent.Type == html.DocumentNode {
+		return false
+	}
+
+	i := -1
+	count := 0
+	for c := parent.FirstChild; c != nil; c = c.NextSibling {
+		if (c.Type != html.ElementNode) || (ofType && c.Data != n.Data) {
+			continue
+		}
+		count++
+		if c == n {
+			i = count
+			if !last {
+				break
+			}
 		}
-		return hasDescendantMatch(n, a)
 	}
+
+	if i == -1 {
+		// This shouldn't happen, since n should always be one of its parent's children.
+		return false
+	}
+
+	if last {
+		i = count - i + 1
+	}
+
+	i -= b
+	if a == 0 {
+		return i == 0
+	}
+
+	return i%a == 0 && i/a >= 0
 }
 
-// nthChildSelector returns a selector that implements :nth-child(an+b).
-// If last is true, implements :nth-last-child instead.
+// simpleNthChildMatch implements :nth-child(b).
 // If ofType is true, implements :nth-of-type instead.
-func nthChildSelector(a, b int, last, ofType bool) Selector {
-	return func(n *html.Node) bool {
-		if n.Type != html.ElementNode {
-			return false
-		}
+func simpleNthChildMatch(b int, ofType bool, n *html.Node) bool {
+	if n.Type != html.ElementNode {
+		return false
+	}
 
-		parent := n.Parent
-		if parent == nil {
-			return false
-		}
+	parent := n.Parent
+	if parent == nil {
+		return false
+	}
 
-		if parent.Type == html.DocumentNode {
-			return false
-		}
+	if parent.Type == html.DocumentNode {
+		return false
+	}
 
-		i := -1
-		count := 0
-		for c := parent.FirstChild; c != nil; c = c.NextSibling {
-			if (c.Type != html.ElementNode) || (ofType && c.Data != n.Data) {
-				continue
-			}
-			count++
-			if c == n {
-				i = count
-				if !last {
-					break
-				}
-			}
+	count := 0
+	for c := parent.FirstChild; c != nil; c = c.NextSibling {
+		if c.Type != html.ElementNode || (ofType && c.Data != n.Data) {
+			continue
 		}
-
-		if i == -1 {
-			// This shouldn't happen, since n should always be one of its parent's children.
+		count++
+		if c == n {
+			return count == b
+		}
+		if count >= b {
 			return false
 		}
+	}
+	return false
+}
 
-		if last {
-			i = count - i + 1
-		}
+// simpleNthLastChildMatch implements :nth-last-child(b).
+// If ofType is true, implements :nth-last-of-type instead.
+func simpleNthLastChildMatch(b int, ofType bool, n *html.Node) bool {
+	if n.Type != html.ElementNode {
+		return false
+	}
 
-		i -= b
-		if a == 0 {
-			return i == 0
-		}
+	parent := n.Parent
+	if parent == nil {
+		return false
+	}
 
-		return i%a == 0 && i/a >= 0
+	if parent.Type == html.DocumentNode {
+		return false
 	}
-}
 
-// simpleNthChildSelector returns a selector that implements :nth-child(b).
-// If ofType is true, implements :nth-of-type instead.
-func simpleNthChildSelector(b int, ofType bool) Selector {
-	return func(n *html.Node) bool {
-		if n.Type != html.ElementNode {
-			return false
+	count := 0
+	for c := parent.LastChild; c != nil; c = c.PrevSibling {
+		if c.Type != html.ElementNode || (ofType && c.Data != n.Data) {
+			continue
 		}
-
-		parent := n.Parent
-		if parent == nil {
-			return false
+		count++
+		if c == n {
+			return count == b
 		}
-
-		if parent.Type == html.DocumentNode {
+		if count >= b {
 			return false
 		}
-
-		count := 0
-		for c := parent.FirstChild; c != nil; c = c.NextSibling {
-			if c.Type != html.ElementNode || (ofType && c.Data != n.Data) {
-				continue
-			}
-			count++
-			if c == n {
-				return count == b
-			}
-			if count >= b {
-				return false
-			}
-		}
-		return false
 	}
+	return false
 }
 
-// simpleNthLastChildSelector returns a selector that implements
-// :nth-last-child(b). If ofType is true, implements :nth-last-of-type
-// instead.
-func simpleNthLastChildSelector(b int, ofType bool) Selector {
-	return func(n *html.Node) bool {
-		if n.Type != html.ElementNode {
-			return false
-		}
+// Specificity for nth-child pseudo-class.
+// Does not support a list of selectors
+func (s nthPseudoClassSelector) Specificity() Specificity {
+	return Specificity{0, 1, 0}
+}
 
-		parent := n.Parent
-		if parent == nil {
-			return false
-		}
+type onlyChildPseudoClassSelector struct {
+	ofType bool
+}
 
-		if parent.Type == html.DocumentNode {
-			return false
-		}
+// Match implements :only-child.
+// If `ofType` is true, it implements :only-of-type instead.
+func (s onlyChildPseudoClassSelector) Match(n *html.Node) bool {
+	if n.Type != html.ElementNode {
+		return false
+	}
 
-		count := 0
-		for c := parent.LastChild; c != nil; c = c.PrevSibling {
-			if c.Type != html.ElementNode || (ofType && c.Data != n.Data) {
-				continue
-			}
-			count++
-			if c == n {
-				return count == b
-			}
-			if count >= b {
-				return false
-			}
-		}
+	parent := n.Parent
+	if parent == nil {
 		return false
 	}
-}
 
-// onlyChildSelector returns a selector that implements :only-child.
-// If ofType is true, it implements :only-of-type instead.
-func onlyChildSelector(ofType bool) Selector {
-	return func(n *html.Node) bool {
-		if n.Type != html.ElementNode {
-			return false
-		}
+	if parent.Type == html.DocumentNode {
+		return false
+	}
 
-		parent := n.Parent
-		if parent == nil {
-			return false
+	count := 0
+	for c := parent.FirstChild; c != nil; c = c.NextSibling {
+		if (c.Type != html.ElementNode) || (s.ofType && c.Data != n.Data) {
+			continue
 		}
-
-		if parent.Type == html.DocumentNode {
+		count++
+		if count > 1 {
 			return false
 		}
+	}
 
-		count := 0
-		for c := parent.FirstChild; c != nil; c = c.NextSibling {
-			if (c.Type != html.ElementNode) || (ofType && c.Data != n.Data) {
-				continue
-			}
-			count++
-			if count > 1 {
-				return false
-			}
-		}
+	return count == 1
+}
 
-		return count == 1
-	}
+func (s onlyChildPseudoClassSelector) Specificity() Specificity {
+	return Specificity{0, 1, 0}
 }
 
-// inputSelector is a Selector that matches input, select, textarea and button elements.
-func inputSelector(n *html.Node) bool {
+type inputPseudoClassSelector struct{}
+
+// Matches input, select, textarea and button elements.
+func (s inputPseudoClassSelector) Match(n *html.Node) bool {
 	return n.Type == html.ElementNode && (n.Data == "input" || n.Data == "select" || n.Data == "textarea" || n.Data == "button")
 }
 
-// emptyElementSelector is a Selector that matches empty elements.
-func emptyElementSelector(n *html.Node) bool {
+func (s inputPseudoClassSelector) Specificity() Specificity {
+	return Specificity{0, 1, 0}
+}
+
+type emptyElementPseudoClassSelector struct{}
+
+// Matches empty elements.
+func (s emptyElementPseudoClassSelector) Match(n *html.Node) bool {
 	if n.Type != html.ElementNode {
 		return false
 	}
@@ -554,69 +690,144 @@ func emptyElementSelector(n *html.Node) bool {
 	return true
 }
 
-// descendantSelector returns a Selector that matches an element if
-// it matches d and has an ancestor that matches a.
-func descendantSelector(a, d Selector) Selector {
-	return func(n *html.Node) bool {
-		if !d(n) {
-			return false
-		}
+func (s emptyElementPseudoClassSelector) Specificity() Specificity {
+	return Specificity{0, 1, 0}
+}
 
-		for p := n.Parent; p != nil; p = p.Parent {
-			if a(p) {
-				return true
-			}
-		}
+type rootPseudoClassSelector struct{}
 
+// Match implements :root
+func (s rootPseudoClassSelector) Match(n *html.Node) bool {
+	if n.Type != html.ElementNode {
+		return false
+	}
+	if n.Parent == nil {
 		return false
 	}
+	return n.Parent.Type == html.DocumentNode
 }
 
-// childSelector returns a Selector that matches an element if
-// it matches d and its parent matches a.
-func childSelector(a, d Selector) Selector {
-	return func(n *html.Node) bool {
-		return d(n) && n.Parent != nil && a(n.Parent)
-	}
+func (s rootPseudoClassSelector) Specificity() Specificity {
+	return Specificity{0, 1, 0}
 }
 
-// siblingSelector returns a Selector that matches an element
-// if it matches s2 and in is preceded by an element that matches s1.
-// If adjacent is true, the sibling must be immediately before the element.
-func siblingSelector(s1, s2 Selector, adjacent bool) Selector {
-	return func(n *html.Node) bool {
-		if !s2(n) {
-			return false
-		}
+type compoundSelector struct {
+	selectors []Sel
+}
 
-		if adjacent {
-			for n = n.PrevSibling; n != nil; n = n.PrevSibling {
-				if n.Type == html.TextNode || n.Type == html.CommentNode {
-					continue
-				}
-				return s1(n)
-			}
+// Matches elements if each sub-selectors matches.
+func (t compoundSelector) Match(n *html.Node) bool {
+	if len(t.selectors) == 0 {
+		return n.Type == html.ElementNode
+	}
+
+	for _, sel := range t.selectors {
+		if !sel.Match(n) {
 			return false
 		}
+	}
+	return true
+}
 
-		// Walk backwards looking for element that matches s1
-		for c := n.PrevSibling; c != nil; c = c.PrevSibling {
-			if s1(c) {
-				return true
-			}
-		}
+func (s compoundSelector) Specificity() Specificity {
+	var out Specificity
+	for _, sel := range s.selectors {
+		out = out.Add(sel.Specificity())
+	}
+	return out
+}
+
+type combinedSelector struct {
+	first      Sel
+	combinator byte
+	second     Sel
+}
+
+func (t combinedSelector) Match(n *html.Node) bool {
+	if t.first == nil {
+		return false // maybe we should panic
+	}
+	switch t.combinator {
+	case 0:
+		return t.first.Match(n)
+	case ' ':
+		return descendantMatch(t.first, t.second, n)
+	case '>':
+		return childMatch(t.first, t.second, n)
+	case '+':
+		return siblingMatch(t.first, t.second, true, n)
+	case '~':
+		return siblingMatch(t.first, t.second, false, n)
+	default:
+		panic("unknown combinator")
+	}
+}
 
+// matches an element if it matches d and has an ancestor that matches a.
+func descendantMatch(a, d Matcher, n *html.Node) bool {
+	if !d.Match(n) {
 		return false
 	}
+
+	for p := n.Parent; p != nil; p = p.Parent {
+		if a.Match(p) {
+			return true
+		}
+	}
+
+	return false
 }
 
-// rootSelector implements :root
-func rootSelector(n *html.Node) bool {
-	if n.Type != html.ElementNode {
+// matches an element if it matches d and its parent matches a.
+func childMatch(a, d Matcher, n *html.Node) bool {
+	return d.Match(n) && n.Parent != nil && a.Match(n.Parent)
+}
+
+// matches an element if it matches s2 and is preceded by an element that matches s1.
+// If adjacent is true, the sibling must be immediately before the element.
+func siblingMatch(s1, s2 Matcher, adjacent bool, n *html.Node) bool {
+	if !s2.Match(n) {
 		return false
 	}
-	if n.Parent == nil {
+
+	if adjacent {
+		for n = n.PrevSibling; n != nil; n = n.PrevSibling {
+			if n.Type == html.TextNode || n.Type == html.CommentNode {
+				continue
+			}
+			return s1.Match(n)
+		}
 		return false
 	}
-	return n.Parent.Type == html.DocumentNode
+
+	// Walk backwards looking for element that matches s1
+	for c := n.PrevSibling; c != nil; c = c.PrevSibling {
+		if s1.Match(c) {
+			return true
+		}
+	}
+
+	return false
+}
+
+func (s combinedSelector) Specificity() Specificity {
+	spec := s.first.Specificity()
+	if s.second != nil {
+		spec = spec.Add(s.second.Specificity())
+	}
+	return spec
+}
+
+// A SelectorGroup is a list of selectors, which matches if any of the
+// individual selectors matches.
+type SelectorGroup []Sel
+
+// Match returns true if the node matches one of the single selectors.
+func (s SelectorGroup) Match(n *html.Node) bool {
+	for _, sel := range s {
+		if sel.Match(n) {
+			return true
+		}
+	}
+	return false
 }
diff --git a/vendor/github.com/andybalholm/cascadia/specificity.go b/vendor/github.com/andybalholm/cascadia/specificity.go
new file mode 100644
index 0000000000..8db864f9be
--- /dev/null
+++ b/vendor/github.com/andybalholm/cascadia/specificity.go
@@ -0,0 +1,26 @@
+package cascadia
+
+// Specificity is the CSS specificity as defined in
+// https://www.w3.org/TR/selectors/#specificity-rules
+// with the convention Specificity = [A,B,C].
+type Specificity [3]int
+
+// returns `true` if s < other (strictly), false otherwise
+func (s Specificity) Less(other Specificity) bool {
+	for i := range s {
+		if s[i] < other[i] {
+			return true
+		}
+		if s[i] > other[i] {
+			return false
+		}
+	}
+	return false
+}
+
+func (s Specificity) Add(other Specificity) Specificity {
+	for i, sp := range other {
+		s[i] += sp
+	}
+	return s
+}
diff --git a/vendor/github.com/go-sql-driver/mysql/.travis.yml b/vendor/github.com/go-sql-driver/mysql/.travis.yml
index cc1268c361..56fcf25f20 100644
--- a/vendor/github.com/go-sql-driver/mysql/.travis.yml
+++ b/vendor/github.com/go-sql-driver/mysql/.travis.yml
@@ -1,10 +1,10 @@
 sudo: false
 language: go
 go:
-  - 1.7.x
-  - 1.8.x
-  - 1.9.x
   - 1.10.x
+  - 1.11.x
+  - 1.12.x
+  - 1.13.x
   - master
 
 before_install:
@@ -99,6 +99,28 @@ matrix:
         - export MYSQL_TEST_ADDR=127.0.0.1:3307
         - export MYSQL_TEST_CONCURRENT=1
 
+    - os: osx
+      osx_image: xcode10.1
+      addons:
+        homebrew:
+          packages:
+            - mysql
+          update: true
+      go: 1.12.x
+      before_install:
+        - go get golang.org/x/tools/cmd/cover
+        - go get github.com/mattn/goveralls
+      before_script:
+        - echo -e "[server]\ninnodb_log_file_size=256MB\ninnodb_buffer_pool_size=512MB\nmax_allowed_packet=16MB\nlocal_infile=1" >> /usr/local/etc/my.cnf
+        - mysql.server start
+        - mysql -uroot -e 'CREATE USER gotest IDENTIFIED BY "secret"'
+        - mysql -uroot -e 'GRANT ALL ON *.* TO gotest'
+        - mysql -uroot -e 'create database gotest;'
+        - export MYSQL_TEST_USER=gotest
+        - export MYSQL_TEST_PASS=secret
+        - export MYSQL_TEST_ADDR=127.0.0.1:3306
+        - export MYSQL_TEST_CONCURRENT=1
+
 script:
   - go test -v -covermode=count -coverprofile=coverage.out
   - go vet ./...
diff --git a/vendor/github.com/go-sql-driver/mysql/AUTHORS b/vendor/github.com/go-sql-driver/mysql/AUTHORS
index 73ff68fbcf..ad59898006 100644
--- a/vendor/github.com/go-sql-driver/mysql/AUTHORS
+++ b/vendor/github.com/go-sql-driver/mysql/AUTHORS
@@ -27,6 +27,7 @@ Daniël van Eeden <git at myname.nl>
 Dave Protasowski <dprotaso at gmail.com>
 DisposaBoy <disposaboy at dby.me>
 Egor Smolyakov <egorsmkv at gmail.com>
+Erwan Martin <hello at erwan.io>
 Evan Shaw <evan at vendhq.com>
 Frederick Mayle <frederickmayle at gmail.com>
 Gustavo Kristic <gkristic at gmail.com>
@@ -34,12 +35,16 @@ Hajime Nakagami <nakagami at gmail.com>
 Hanno Braun <mail at hannobraun.com>
 Henri Yandell <flamefew at gmail.com>
 Hirotaka Yamamoto <ymmt2005 at gmail.com>
+Huyiguang <hyg at webterren.com>
 ICHINOSE Shogo <shogo82148 at gmail.com>
+Ilia Cimpoes <ichimpoesh at gmail.com>
 INADA Naoki <songofacandy at gmail.com>
 Jacek Szwec <szwec.jacek at gmail.com>
 James Harr <james.harr at gmail.com>
 Jeff Hodges <jeff at somethingsimilar.com>
 Jeffrey Charles <jeffreycharles at gmail.com>
+Jerome Meyer <jxmeyer at gmail.com>
+Jiajia Zhong <zhong2plus at gmail.com>
 Jian Zhen <zhenjl at gmail.com>
 Joshua Prunier <joshua.prunier at gmail.com>
 Julien Lefevre <julien.lefevr at gmail.com>
@@ -58,6 +63,7 @@ Lucas Liu <extrafliu at gmail.com>
 Luke Scott <luke at webconnex.com>
 Maciej Zimnoch <maciej.zimnoch at codilime.com>
 Michael Woolnough <michael.woolnough at gmail.com>
+Nathanial Murphy <nathanial.murphy at gmail.com>
 Nicola Peduzzi <thenikso at gmail.com>
 Olivier Mengué <dolmen at cpan.org>
 oscarzhao <oscarzhaosl at gmail.com>
@@ -69,9 +75,15 @@ Richard Wilkes <wilkes at me.com>
 Robert Russell <robert at rrbrussell.com>
 Runrioter Wung <runrioter at gmail.com>
 Shuode Li <elemount at qq.com>
+Simon J Mudd <sjmudd at pobox.com>
 Soroush Pour <me at soroushjp.com>
 Stan Putrya <root.vagner at gmail.com>
 Stanley Gunawan <gunawan.stanley at gmail.com>
+Steven Hartland <steven.hartland at multiplay.co.uk>
+Thomas Wodarek <wodarekwebpage at gmail.com>
+Tim Ruffles <timruffles at gmail.com>
+Tom Jenkinson <tom at tjenkinson.me>
+Vladimir Kovpak <cn007b at gmail.com>
 Xiangyu Hu <xiangyu.hu at outlook.com>
 Xiaobing Jiang <s7v7nislands at gmail.com>
 Xiuming Chen <cc at cxm.cc>
@@ -81,9 +93,13 @@ Zhenye Xie <xiezhenye at gmail.com>
 
 Barracuda Networks, Inc.
 Counting Ltd.
+DigitalOcean Inc.
+Facebook Inc.
+GitHub Inc.
 Google Inc.
 InfoSum Ltd.
 Keybase Inc.
+Multiplay Ltd.
 Percona LLC
 Pivotal Inc.
 Stripe Inc.
diff --git a/vendor/github.com/go-sql-driver/mysql/CHANGELOG.md b/vendor/github.com/go-sql-driver/mysql/CHANGELOG.md
index ce1b5330a9..9cb97b38de 100644
--- a/vendor/github.com/go-sql-driver/mysql/CHANGELOG.md
+++ b/vendor/github.com/go-sql-driver/mysql/CHANGELOG.md
@@ -1,3 +1,31 @@
+## Version 1.5 (2020-01-07)
+
+Changes:
+
+  - Dropped support Go 1.9 and lower (#823, #829, #886, #1016, #1017)
+  - Improve buffer handling (#890)
+  - Document potentially insecure TLS configs (#901)
+  - Use a double-buffering scheme to prevent data races (#943)
+  - Pass uint64 values without converting them to string (#838, #955)
+  - Update collations and make utf8mb4 default (#877, #1054)
+  - Make NullTime compatible with sql.NullTime in Go 1.13+ (#995)
+  - Removed CloudSQL support (#993, #1007)
+  - Add Go Module support (#1003)
+
+New Features:
+
+  - Implement support of optional TLS (#900)
+  - Check connection liveness (#934, #964, #997, #1048, #1051, #1052)
+  - Implement Connector Interface (#941, #958, #1020, #1035)
+
+Bugfixes:
+
+  - Mark connections as bad on error during ping (#875)
+  - Mark connections as bad on error during dial (#867)
+  - Fix connection leak caused by rapid context cancellation (#1024)
+  - Mark connections as bad on error during Conn.Prepare (#1030)
+
+
 ## Version 1.4.1 (2018-11-14)
 
 Bugfixes:
diff --git a/vendor/github.com/go-sql-driver/mysql/CONTRIBUTING.md b/vendor/github.com/go-sql-driver/mysql/CONTRIBUTING.md
deleted file mode 100644
index 8fe16bcb49..0000000000
--- a/vendor/github.com/go-sql-driver/mysql/CONTRIBUTING.md
+++ /dev/null
@@ -1,23 +0,0 @@
-# Contributing Guidelines
-
-## Reporting Issues
-
-Before creating a new Issue, please check first if a similar Issue [already exists](https://github.com/go-sql-driver/mysql/issues?state=open) or was [recently closed](https://github.com/go-sql-driver/mysql/issues?direction=desc&page=1&sort=updated&state=closed).
-
-## Contributing Code
-
-By contributing to this project, you share your code under the Mozilla Public License 2, as specified in the LICENSE file.
-Don't forget to add yourself to the AUTHORS file.
-
-### Code Review
-
-Everyone is invited to review and comment on pull requests.
-If it looks fine to you, comment with "LGTM" (Looks good to me).
-
-If changes are required, notice the reviewers with "PTAL" (Please take another look) after committing the fixes.
-
-Before merging the Pull Request, at least one [team member](https://github.com/go-sql-driver?tab=members) must have commented with "LGTM".
-
-## Development Ideas
-
-If you are looking for ideas for code contributions, please check our [Development Ideas](https://github.com/go-sql-driver/mysql/wiki/Development-Ideas) Wiki page.
diff --git a/vendor/github.com/go-sql-driver/mysql/README.md b/vendor/github.com/go-sql-driver/mysql/README.md
index 2e9b07eeb2..d2627a41a7 100644
--- a/vendor/github.com/go-sql-driver/mysql/README.md
+++ b/vendor/github.com/go-sql-driver/mysql/README.md
@@ -40,7 +40,7 @@ A MySQL-Driver for Go's [database/sql](https://golang.org/pkg/database/sql/) pac
   * Optional placeholder interpolation
 
 ## Requirements
-  * Go 1.7 or higher. We aim to support the 3 latest versions of Go.
+  * Go 1.10 or higher. We aim to support the 3 latest versions of Go.
   * MySQL (4.1+), MariaDB, Percona Server, Google CloudSQL or Sphinx (2.2.3+)
 
 ---------------------------------------
@@ -166,18 +166,34 @@ Sets the charset used for client-server interaction (`"SET NAMES <value>"`). If
 Usage of the `charset` parameter is discouraged because it issues additional queries to the server.
 Unless you need the fallback behavior, please use `collation` instead.
 
+##### `checkConnLiveness`
+
+```
+Type:           bool
+Valid Values:   true, false
+Default:        true
+```
+
+On supported platforms connections retrieved from the connection pool are checked for liveness before using them. If the check fails, the respective connection is marked as bad and the query retried with another connection.
+`checkConnLiveness=false` disables this liveness check of connections.
+
 ##### `collation`
 
 ```
 Type:           string
 Valid Values:   <name>
-Default:        utf8_general_ci
+Default:        utf8mb4_general_ci
 ```
 
 Sets the collation used for client-server interaction on connection. In contrast to `charset`, `collation` does not issue additional queries. If the specified collation is unavailable on the target server, the connection will fail.
 
 A list of valid charsets for a server is retrievable with `SHOW COLLATION`.
 
+The default collation (`utf8mb4_general_ci`) is supported from MySQL 5.5.  You should use an older collation (e.g. `utf8_general_ci`) for older MySQL.
+
+Collations for charset "ucs2", "utf16", "utf16le", and "utf32" can not be used ([ref](https://dev.mysql.com/doc/refman/5.7/en/charset-connection.html#charset-connection-impermissible-client-charset)).
+
+
 ##### `clientFoundRows`
 
 ```
@@ -328,11 +344,11 @@ Timeout for establishing connections, aka dial timeout. The value must be a deci
 
 ```
 Type:           bool / string
-Valid Values:   true, false, skip-verify, <name>
+Valid Values:   true, false, skip-verify, preferred, <name>
 Default:        false
 ```
 
-`tls=true` enables TLS / SSL encrypted connection to the server. Use `skip-verify` if you want to use a self-signed or invalid certificate (server side). Use a custom value registered with [`mysql.RegisterTLSConfig`](https://godoc.org/github.com/go-sql-driver/mysql#RegisterTLSConfig).
+`tls=true` enables TLS / SSL encrypted connection to the server. Use `skip-verify` if you want to use a self-signed or invalid certificate (server side) or use `preferred` to use TLS only when advertised by the server. This is similar to `skip-verify`, but additionally allows a fallback to a connection which is not encrypted. Neither `skip-verify` nor `preferred` add any reliable security. You can use a custom TLS config after registering it with [`mysql.RegisterTLSConfig`](https://godoc.org/github.com/go-sql-driver/mysql#RegisterTLSConfig).
 
 
 ##### `writeTimeout`
@@ -391,14 +407,9 @@ TCP on a remote host, e.g. Amazon RDS:
 id:password@tcp(your-amazonaws-uri.com:3306)/dbname
 ```
 
-Google Cloud SQL on App Engine (First Generation MySQL Server):
-```
-user@cloudsql(project-id:instance-name)/dbname
-```
-
-Google Cloud SQL on App Engine (Second Generation MySQL Server):
+Google Cloud SQL on App Engine:
 ```
-user@cloudsql(project-id:regionname:instance-name)/dbname
+user:password@unix(/cloudsql/project-id:region-name:instance-name)/dbname
 ```
 
 TCP using default port (3306) on localhost:
@@ -444,7 +455,7 @@ See the [godoc of Go-MySQL-Driver](https://godoc.org/github.com/go-sql-driver/my
 ### `time.Time` support
 The default internal output type of MySQL `DATE` and `DATETIME` values is `[]byte` which allows you to scan the value into a `[]byte`, `string` or `sql.RawBytes` variable in your program.
 
-However, many want to scan MySQL `DATE` and `DATETIME` values into `time.Time` variables, which is the logical opposite in Go to `DATE` and `DATETIME` in MySQL. You can do that by changing the internal output type from `[]byte` to `time.Time` with the DSN parameter `parseTime=true`. You can set the default [`time.Time` location](https://golang.org/pkg/time/#Location) with the `loc` DSN parameter.
+However, many want to scan MySQL `DATE` and `DATETIME` values into `time.Time` variables, which is the logical equivalent in Go to `DATE` and `DATETIME` in MySQL. You can do that by changing the internal output type from `[]byte` to `time.Time` with the DSN parameter `parseTime=true`. You can set the default [`time.Time` location](https://golang.org/pkg/time/#Location) with the `loc` DSN parameter.
 
 **Caution:** As of Go 1.1, this makes `time.Time` the only variable type you can scan `DATE` and `DATETIME` values into. This breaks for example [`sql.RawBytes` support](https://github.com/go-sql-driver/mysql/wiki/Examples#rawbytes).
 
@@ -452,13 +463,13 @@ Alternatively you can use the [`NullTime`](https://godoc.org/github.com/go-sql-d
 
 
 ### Unicode support
-Since version 1.1 Go-MySQL-Driver automatically uses the collation `utf8_general_ci` by default.
+Since version 1.5 Go-MySQL-Driver automatically uses the collation ` utf8mb4_general_ci` by default.
 
 Other collations / charsets can be set using the [`collation`](#collation) DSN parameter.
 
 Version 1.0 of the driver recommended adding `&charset=utf8` (alias for `SET NAMES utf8`) to the DSN to enable proper UTF-8 support. This is not necessary anymore. The [`collation`](#collation) parameter should be preferred to set another collation / charset than the default.
 
-See http://dev.mysql.com/doc/refman/5.7/en/charset-unicode.html for more details on MySQL's Unicode support.
+See http://dev.mysql.com/doc/refman/8.0/en/charset-unicode.html for more details on MySQL's Unicode support.
 
 ## Testing / Development
 To run the driver tests you may need to adjust the configuration. See the [Testing Wiki-Page](https://github.com/go-sql-driver/mysql/wiki/Testing "Testing") for details.
diff --git a/vendor/github.com/go-sql-driver/mysql/auth.go b/vendor/github.com/go-sql-driver/mysql/auth.go
index 14f678a87b..fec7040d4a 100644
--- a/vendor/github.com/go-sql-driver/mysql/auth.go
+++ b/vendor/github.com/go-sql-driver/mysql/auth.go
@@ -360,13 +360,15 @@ func (mc *mysqlConn) handleAuthResult(oldAuthData []byte, plugin string) error {
 					pubKey := mc.cfg.pubKey
 					if pubKey == nil {
 						// request public key from server
-						data := mc.buf.takeSmallBuffer(4 + 1)
+						data, err := mc.buf.takeSmallBuffer(4 + 1)
+						if err != nil {
+							return err
+						}
 						data[4] = cachingSha2PasswordRequestPublicKey
 						mc.writePacket(data)
 
 						// parse public key
-						data, err := mc.readPacket()
-						if err != nil {
+						if data, err = mc.readPacket(); err != nil {
 							return err
 						}
 
diff --git a/vendor/github.com/go-sql-driver/mysql/buffer.go b/vendor/github.com/go-sql-driver/mysql/buffer.go
index eb4748bf44..0774c5c8c2 100644
--- a/vendor/github.com/go-sql-driver/mysql/buffer.go
+++ b/vendor/github.com/go-sql-driver/mysql/buffer.go
@@ -15,47 +15,69 @@ import (
 )
 
 const defaultBufSize = 4096
+const maxCachedBufSize = 256 * 1024
 
 // A buffer which is used for both reading and writing.
 // This is possible since communication on each connection is synchronous.
 // In other words, we can't write and read simultaneously on the same connection.
 // The buffer is similar to bufio.Reader / Writer but zero-copy-ish
 // Also highly optimized for this particular use case.
+// This buffer is backed by two byte slices in a double-buffering scheme
 type buffer struct {
-	buf     []byte
+	buf     []byte // buf is a byte buffer who's length and capacity are equal.
 	nc      net.Conn
 	idx     int
 	length  int
 	timeout time.Duration
+	dbuf    [2][]byte // dbuf is an array with the two byte slices that back this buffer
+	flipcnt uint      // flipccnt is the current buffer counter for double-buffering
 }
 
+// newBuffer allocates and returns a new buffer.
 func newBuffer(nc net.Conn) buffer {
-	var b [defaultBufSize]byte
+	fg := make([]byte, defaultBufSize)
 	return buffer{
-		buf: b[:],
-		nc:  nc,
+		buf:  fg,
+		nc:   nc,
+		dbuf: [2][]byte{fg, nil},
 	}
 }
 
+// flip replaces the active buffer with the background buffer
+// this is a delayed flip that simply increases the buffer counter;
+// the actual flip will be performed the next time we call `buffer.fill`
+func (b *buffer) flip() {
+	b.flipcnt += 1
+}
+
 // fill reads into the buffer until at least _need_ bytes are in it
 func (b *buffer) fill(need int) error {
 	n := b.length
+	// fill data into its double-buffering target: if we've called
+	// flip on this buffer, we'll be copying to the background buffer,
+	// and then filling it with network data; otherwise we'll just move
+	// the contents of the current buffer to the front before filling it
+	dest := b.dbuf[b.flipcnt&1]
+
+	// grow buffer if necessary to fit the whole packet.
+	if need > len(dest) {
+		// Round up to the next multiple of the default size
+		dest = make([]byte, ((need/defaultBufSize)+1)*defaultBufSize)
 
-	// move existing data to the beginning
-	if n > 0 && b.idx > 0 {
-		copy(b.buf[0:n], b.buf[b.idx:])
+		// if the allocated buffer is not too large, move it to backing storage
+		// to prevent extra allocations on applications that perform large reads
+		if len(dest) <= maxCachedBufSize {
+			b.dbuf[b.flipcnt&1] = dest
+		}
 	}
 
-	// grow buffer if necessary
-	// TODO: let the buffer shrink again at some point
-	//       Maybe keep the org buf slice and swap back?
-	if need > len(b.buf) {
-		// Round up to the next multiple of the default size
-		newBuf := make([]byte, ((need/defaultBufSize)+1)*defaultBufSize)
-		copy(newBuf, b.buf)
-		b.buf = newBuf
+	// if we're filling the fg buffer, move the existing data to the start of it.
+	// if we're filling the bg buffer, copy over the data
+	if n > 0 {
+		copy(dest[:n], b.buf[b.idx:])
 	}
 
+	b.buf = dest
 	b.idx = 0
 
 	for {
@@ -105,43 +127,56 @@ func (b *buffer) readNext(need int) ([]byte, error) {
 	return b.buf[offset:b.idx], nil
 }
 
-// returns a buffer with the requested size.
+// takeBuffer returns a buffer with the requested size.
 // If possible, a slice from the existing buffer is returned.
 // Otherwise a bigger buffer is made.
 // Only one buffer (total) can be used at a time.
-func (b *buffer) takeBuffer(length int) []byte {
+func (b *buffer) takeBuffer(length int) ([]byte, error) {
 	if b.length > 0 {
-		return nil
+		return nil, ErrBusyBuffer
 	}
 
 	// test (cheap) general case first
-	if length <= defaultBufSize || length <= cap(b.buf) {
-		return b.buf[:length]
+	if length <= cap(b.buf) {
+		return b.buf[:length], nil
 	}
 
 	if length < maxPacketSize {
 		b.buf = make([]byte, length)
-		return b.buf
+		return b.buf, nil
 	}
-	return make([]byte, length)
+
+	// buffer is larger than we want to store.
+	return make([]byte, length), nil
 }
 
-// shortcut which can be used if the requested buffer is guaranteed to be
-// smaller than defaultBufSize
+// takeSmallBuffer is shortcut which can be used if length is
+// known to be smaller than defaultBufSize.
 // Only one buffer (total) can be used at a time.
-func (b *buffer) takeSmallBuffer(length int) []byte {
+func (b *buffer) takeSmallBuffer(length int) ([]byte, error) {
 	if b.length > 0 {
-		return nil
+		return nil, ErrBusyBuffer
 	}
-	return b.buf[:length]
+	return b.buf[:length], nil
 }
 
 // takeCompleteBuffer returns the complete existing buffer.
 // This can be used if the necessary buffer size is unknown.
+// cap and len of the returned buffer will be equal.
 // Only one buffer (total) can be used at a time.
-func (b *buffer) takeCompleteBuffer() []byte {
+func (b *buffer) takeCompleteBuffer() ([]byte, error) {
+	if b.length > 0 {
+		return nil, ErrBusyBuffer
+	}
+	return b.buf, nil
+}
+
+// store stores buf, an updated buffer, if its suitable to do so.
+func (b *buffer) store(buf []byte) error {
 	if b.length > 0 {
-		return nil
+		return ErrBusyBuffer
+	} else if cap(buf) <= maxPacketSize && cap(buf) > cap(b.buf) {
+		b.buf = buf[:cap(buf)]
 	}
-	return b.buf
+	return nil
 }
diff --git a/vendor/github.com/go-sql-driver/mysql/collations.go b/vendor/github.com/go-sql-driver/mysql/collations.go
index 136c9e4d1e..8d2b556767 100644
--- a/vendor/github.com/go-sql-driver/mysql/collations.go
+++ b/vendor/github.com/go-sql-driver/mysql/collations.go
@@ -8,183 +8,190 @@
 
 package mysql
 
-const defaultCollation = "utf8_general_ci"
+const defaultCollation = "utf8mb4_general_ci"
 const binaryCollation = "binary"
 
 // A list of available collations mapped to the internal ID.
 // To update this map use the following MySQL query:
-//     SELECT COLLATION_NAME, ID FROM information_schema.COLLATIONS
+//     SELECT COLLATION_NAME, ID FROM information_schema.COLLATIONS WHERE ID<256 ORDER BY ID
+//
+// Handshake packet have only 1 byte for collation_id.  So we can't use collations with ID > 255.
+//
+// ucs2, utf16, and utf32 can't be used for connection charset.
+// https://dev.mysql.com/doc/refman/5.7/en/charset-connection.html#charset-connection-impermissible-client-charset
+// They are commented out to reduce this map.
 var collations = map[string]byte{
-	"big5_chinese_ci":          1,
-	"latin2_czech_cs":          2,
-	"dec8_swedish_ci":          3,
-	"cp850_general_ci":         4,
-	"latin1_german1_ci":        5,
-	"hp8_english_ci":           6,
-	"koi8r_general_ci":         7,
-	"latin1_swedish_ci":        8,
-	"latin2_general_ci":        9,
-	"swe7_swedish_ci":          10,
-	"ascii_general_ci":         11,
-	"ujis_japanese_ci":         12,
-	"sjis_japanese_ci":         13,
-	"cp1251_bulgarian_ci":      14,
-	"latin1_danish_ci":         15,
-	"hebrew_general_ci":        16,
-	"tis620_thai_ci":           18,
-	"euckr_korean_ci":          19,
-	"latin7_estonian_cs":       20,
-	"latin2_hungarian_ci":      21,
-	"koi8u_general_ci":         22,
-	"cp1251_ukrainian_ci":      23,
-	"gb2312_chinese_ci":        24,
-	"greek_general_ci":         25,
-	"cp1250_general_ci":        26,
-	"latin2_croatian_ci":       27,
-	"gbk_chinese_ci":           28,
-	"cp1257_lithuanian_ci":     29,
-	"latin5_turkish_ci":        30,
-	"latin1_german2_ci":        31,
-	"armscii8_general_ci":      32,
-	"utf8_general_ci":          33,
-	"cp1250_czech_cs":          34,
-	"ucs2_general_ci":          35,
-	"cp866_general_ci":         36,
-	"keybcs2_general_ci":       37,
-	"macce_general_ci":         38,
-	"macroman_general_ci":      39,
-	"cp852_general_ci":         40,
-	"latin7_general_ci":        41,
-	"latin7_general_cs":        42,
-	"macce_bin":                43,
-	"cp1250_croatian_ci":       44,
-	"utf8mb4_general_ci":       45,
-	"utf8mb4_bin":              46,
-	"latin1_bin":               47,
-	"latin1_general_ci":        48,
-	"latin1_general_cs":        49,
-	"cp1251_bin":               50,
-	"cp1251_general_ci":        51,
-	"cp1251_general_cs":        52,
-	"macroman_bin":             53,
-	"utf16_general_ci":         54,
-	"utf16_bin":                55,
-	"utf16le_general_ci":       56,
-	"cp1256_general_ci":        57,
-	"cp1257_bin":               58,
-	"cp1257_general_ci":        59,
-	"utf32_general_ci":         60,
-	"utf32_bin":                61,
-	"utf16le_bin":              62,
-	"binary":                   63,
-	"armscii8_bin":             64,
-	"ascii_bin":                65,
-	"cp1250_bin":               66,
-	"cp1256_bin":               67,
-	"cp866_bin":                68,
-	"dec8_bin":                 69,
-	"greek_bin":                70,
-	"hebrew_bin":               71,
-	"hp8_bin":                  72,
-	"keybcs2_bin":              73,
-	"koi8r_bin":                74,
-	"koi8u_bin":                75,
-	"latin2_bin":               77,
-	"latin5_bin":               78,
-	"latin7_bin":               79,
-	"cp850_bin":                80,
-	"cp852_bin":                81,
-	"swe7_bin":                 82,
-	"utf8_bin":                 83,
-	"big5_bin":                 84,
-	"euckr_bin":                85,
-	"gb2312_bin":               86,
-	"gbk_bin":                  87,
-	"sjis_bin":                 88,
-	"tis620_bin":               89,
-	"ucs2_bin":                 90,
-	"ujis_bin":                 91,
-	"geostd8_general_ci":       92,
-	"geostd8_bin":              93,
-	"latin1_spanish_ci":        94,
-	"cp932_japanese_ci":        95,
-	"cp932_bin":                96,
-	"eucjpms_japanese_ci":      97,
-	"eucjpms_bin":              98,
-	"cp1250_polish_ci":         99,
-	"utf16_unicode_ci":         101,
-	"utf16_icelandic_ci":       102,
-	"utf16_latvian_ci":         103,
-	"utf16_romanian_ci":        104,
-	"utf16_slovenian_ci":       105,
-	"utf16_polish_ci":          106,
-	"utf16_estonian_ci":        107,
-	"utf16_spanish_ci":         108,
-	"utf16_swedish_ci":         109,
-	"utf16_turkish_ci":         110,
-	"utf16_czech_ci":           111,
-	"utf16_danish_ci":          112,
-	"utf16_lithuanian_ci":      113,
-	"utf16_slovak_ci":          114,
-	"utf16_spanish2_ci":        115,
-	"utf16_roman_ci":           116,
-	"utf16_persian_ci":         117,
-	"utf16_esperanto_ci":       118,
-	"utf16_hungarian_ci":       119,
-	"utf16_sinhala_ci":         120,
-	"utf16_german2_ci":         121,
-	"utf16_croatian_ci":        122,
-	"utf16_unicode_520_ci":     123,
-	"utf16_vietnamese_ci":      124,
-	"ucs2_unicode_ci":          128,
-	"ucs2_icelandic_ci":        129,
-	"ucs2_latvian_ci":          130,
-	"ucs2_romanian_ci":         131,
-	"ucs2_slovenian_ci":        132,
-	"ucs2_polish_ci":           133,
-	"ucs2_estonian_ci":         134,
-	"ucs2_spanish_ci":          135,
-	"ucs2_swedish_ci":          136,
-	"ucs2_turkish_ci":          137,
-	"ucs2_czech_ci":            138,
-	"ucs2_danish_ci":           139,
-	"ucs2_lithuanian_ci":       140,
-	"ucs2_slovak_ci":           141,
-	"ucs2_spanish2_ci":         142,
-	"ucs2_roman_ci":            143,
-	"ucs2_persian_ci":          144,
-	"ucs2_esperanto_ci":        145,
-	"ucs2_hungarian_ci":        146,
-	"ucs2_sinhala_ci":          147,
-	"ucs2_german2_ci":          148,
-	"ucs2_croatian_ci":         149,
-	"ucs2_unicode_520_ci":      150,
-	"ucs2_vietnamese_ci":       151,
-	"ucs2_general_mysql500_ci": 159,
-	"utf32_unicode_ci":         160,
-	"utf32_icelandic_ci":       161,
-	"utf32_latvian_ci":         162,
-	"utf32_romanian_ci":        163,
-	"utf32_slovenian_ci":       164,
-	"utf32_polish_ci":          165,
-	"utf32_estonian_ci":        166,
-	"utf32_spanish_ci":         167,
-	"utf32_swedish_ci":         168,
-	"utf32_turkish_ci":         169,
-	"utf32_czech_ci":           170,
-	"utf32_danish_ci":          171,
-	"utf32_lithuanian_ci":      172,
-	"utf32_slovak_ci":          173,
-	"utf32_spanish2_ci":        174,
-	"utf32_roman_ci":           175,
-	"utf32_persian_ci":         176,
-	"utf32_esperanto_ci":       177,
-	"utf32_hungarian_ci":       178,
-	"utf32_sinhala_ci":         179,
-	"utf32_german2_ci":         180,
-	"utf32_croatian_ci":        181,
-	"utf32_unicode_520_ci":     182,
-	"utf32_vietnamese_ci":      183,
+	"big5_chinese_ci":      1,
+	"latin2_czech_cs":      2,
+	"dec8_swedish_ci":      3,
+	"cp850_general_ci":     4,
+	"latin1_german1_ci":    5,
+	"hp8_english_ci":       6,
+	"koi8r_general_ci":     7,
+	"latin1_swedish_ci":    8,
+	"latin2_general_ci":    9,
+	"swe7_swedish_ci":      10,
+	"ascii_general_ci":     11,
+	"ujis_japanese_ci":     12,
+	"sjis_japanese_ci":     13,
+	"cp1251_bulgarian_ci":  14,
+	"latin1_danish_ci":     15,
+	"hebrew_general_ci":    16,
+	"tis620_thai_ci":       18,
+	"euckr_korean_ci":      19,
+	"latin7_estonian_cs":   20,
+	"latin2_hungarian_ci":  21,
+	"koi8u_general_ci":     22,
+	"cp1251_ukrainian_ci":  23,
+	"gb2312_chinese_ci":    24,
+	"greek_general_ci":     25,
+	"cp1250_general_ci":    26,
+	"latin2_croatian_ci":   27,
+	"gbk_chinese_ci":       28,
+	"cp1257_lithuanian_ci": 29,
+	"latin5_turkish_ci":    30,
+	"latin1_german2_ci":    31,
+	"armscii8_general_ci":  32,
+	"utf8_general_ci":      33,
+	"cp1250_czech_cs":      34,
+	//"ucs2_general_ci":          35,
+	"cp866_general_ci":    36,
+	"keybcs2_general_ci":  37,
+	"macce_general_ci":    38,
+	"macroman_general_ci": 39,
+	"cp852_general_ci":    40,
+	"latin7_general_ci":   41,
+	"latin7_general_cs":   42,
+	"macce_bin":           43,
+	"cp1250_croatian_ci":  44,
+	"utf8mb4_general_ci":  45,
+	"utf8mb4_bin":         46,
+	"latin1_bin":          47,
+	"latin1_general_ci":   48,
+	"latin1_general_cs":   49,
+	"cp1251_bin":          50,
+	"cp1251_general_ci":   51,
+	"cp1251_general_cs":   52,
+	"macroman_bin":        53,
+	//"utf16_general_ci":         54,
+	//"utf16_bin":                55,
+	//"utf16le_general_ci":       56,
+	"cp1256_general_ci": 57,
+	"cp1257_bin":        58,
+	"cp1257_general_ci": 59,
+	//"utf32_general_ci":         60,
+	//"utf32_bin":                61,
+	//"utf16le_bin":              62,
+	"binary":          63,
+	"armscii8_bin":    64,
+	"ascii_bin":       65,
+	"cp1250_bin":      66,
+	"cp1256_bin":      67,
+	"cp866_bin":       68,
+	"dec8_bin":        69,
+	"greek_bin":       70,
+	"hebrew_bin":      71,
+	"hp8_bin":         72,
+	"keybcs2_bin":     73,
+	"koi8r_bin":       74,
+	"koi8u_bin":       75,
+	"utf8_tolower_ci": 76,
+	"latin2_bin":      77,
+	"latin5_bin":      78,
+	"latin7_bin":      79,
+	"cp850_bin":       80,
+	"cp852_bin":       81,
+	"swe7_bin":        82,
+	"utf8_bin":        83,
+	"big5_bin":        84,
+	"euckr_bin":       85,
+	"gb2312_bin":      86,
+	"gbk_bin":         87,
+	"sjis_bin":        88,
+	"tis620_bin":      89,
+	//"ucs2_bin":                 90,
+	"ujis_bin":            91,
+	"geostd8_general_ci":  92,
+	"geostd8_bin":         93,
+	"latin1_spanish_ci":   94,
+	"cp932_japanese_ci":   95,
+	"cp932_bin":           96,
+	"eucjpms_japanese_ci": 97,
+	"eucjpms_bin":         98,
+	"cp1250_polish_ci":    99,
+	//"utf16_unicode_ci":         101,
+	//"utf16_icelandic_ci":       102,
+	//"utf16_latvian_ci":         103,
+	//"utf16_romanian_ci":        104,
+	//"utf16_slovenian_ci":       105,
+	//"utf16_polish_ci":          106,
+	//"utf16_estonian_ci":        107,
+	//"utf16_spanish_ci":         108,
+	//"utf16_swedish_ci":         109,
+	//"utf16_turkish_ci":         110,
+	//"utf16_czech_ci":           111,
+	//"utf16_danish_ci":          112,
+	//"utf16_lithuanian_ci":      113,
+	//"utf16_slovak_ci":          114,
+	//"utf16_spanish2_ci":        115,
+	//"utf16_roman_ci":           116,
+	//"utf16_persian_ci":         117,
+	//"utf16_esperanto_ci":       118,
+	//"utf16_hungarian_ci":       119,
+	//"utf16_sinhala_ci":         120,
+	//"utf16_german2_ci":         121,
+	//"utf16_croatian_ci":        122,
+	//"utf16_unicode_520_ci":     123,
+	//"utf16_vietnamese_ci":      124,
+	//"ucs2_unicode_ci":          128,
+	//"ucs2_icelandic_ci":        129,
+	//"ucs2_latvian_ci":          130,
+	//"ucs2_romanian_ci":         131,
+	//"ucs2_slovenian_ci":        132,
+	//"ucs2_polish_ci":           133,
+	//"ucs2_estonian_ci":         134,
+	//"ucs2_spanish_ci":          135,
+	//"ucs2_swedish_ci":          136,
+	//"ucs2_turkish_ci":          137,
+	//"ucs2_czech_ci":            138,
+	//"ucs2_danish_ci":           139,
+	//"ucs2_lithuanian_ci":       140,
+	//"ucs2_slovak_ci":           141,
+	//"ucs2_spanish2_ci":         142,
+	//"ucs2_roman_ci":            143,
+	//"ucs2_persian_ci":          144,
+	//"ucs2_esperanto_ci":        145,
+	//"ucs2_hungarian_ci":        146,
+	//"ucs2_sinhala_ci":          147,
+	//"ucs2_german2_ci":          148,
+	//"ucs2_croatian_ci":         149,
+	//"ucs2_unicode_520_ci":      150,
+	//"ucs2_vietnamese_ci":       151,
+	//"ucs2_general_mysql500_ci": 159,
+	//"utf32_unicode_ci":         160,
+	//"utf32_icelandic_ci":       161,
+	//"utf32_latvian_ci":         162,
+	//"utf32_romanian_ci":        163,
+	//"utf32_slovenian_ci":       164,
+	//"utf32_polish_ci":          165,
+	//"utf32_estonian_ci":        166,
+	//"utf32_spanish_ci":         167,
+	//"utf32_swedish_ci":         168,
+	//"utf32_turkish_ci":         169,
+	//"utf32_czech_ci":           170,
+	//"utf32_danish_ci":          171,
+	//"utf32_lithuanian_ci":      172,
+	//"utf32_slovak_ci":          173,
+	//"utf32_spanish2_ci":        174,
+	//"utf32_roman_ci":           175,
+	//"utf32_persian_ci":         176,
+	//"utf32_esperanto_ci":       177,
+	//"utf32_hungarian_ci":       178,
+	//"utf32_sinhala_ci":         179,
+	//"utf32_german2_ci":         180,
+	//"utf32_croatian_ci":        181,
+	//"utf32_unicode_520_ci":     182,
+	//"utf32_vietnamese_ci":      183,
 	"utf8_unicode_ci":          192,
 	"utf8_icelandic_ci":        193,
 	"utf8_latvian_ci":          194,
@@ -234,18 +241,25 @@ var collations = map[string]byte{
 	"utf8mb4_croatian_ci":      245,
 	"utf8mb4_unicode_520_ci":   246,
 	"utf8mb4_vietnamese_ci":    247,
+	"gb18030_chinese_ci":       248,
+	"gb18030_bin":              249,
+	"gb18030_unicode_520_ci":   250,
+	"utf8mb4_0900_ai_ci":       255,
 }
 
 // A blacklist of collations which is unsafe to interpolate parameters.
 // These multibyte encodings may contains 0x5c (`\`) in their trailing bytes.
 var unsafeCollations = map[string]bool{
-	"big5_chinese_ci":   true,
-	"sjis_japanese_ci":  true,
-	"gbk_chinese_ci":    true,
-	"big5_bin":          true,
-	"gb2312_bin":        true,
-	"gbk_bin":           true,
-	"sjis_bin":          true,
-	"cp932_japanese_ci": true,
-	"cp932_bin":         true,
+	"big5_chinese_ci":        true,
+	"sjis_japanese_ci":       true,
+	"gbk_chinese_ci":         true,
+	"big5_bin":               true,
+	"gb2312_bin":             true,
+	"gbk_bin":                true,
+	"sjis_bin":               true,
+	"cp932_japanese_ci":      true,
+	"cp932_bin":              true,
+	"gb18030_chinese_ci":     true,
+	"gb18030_bin":            true,
+	"gb18030_unicode_520_ci": true,
 }
diff --git a/vendor/github.com/go-sql-driver/mysql/conncheck.go b/vendor/github.com/go-sql-driver/mysql/conncheck.go
new file mode 100644
index 0000000000..024eb28589
--- /dev/null
+++ b/vendor/github.com/go-sql-driver/mysql/conncheck.go
@@ -0,0 +1,54 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2019 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// +build linux darwin dragonfly freebsd netbsd openbsd solaris illumos
+
+package mysql
+
+import (
+	"errors"
+	"io"
+	"net"
+	"syscall"
+)
+
+var errUnexpectedRead = errors.New("unexpected read from socket")
+
+func connCheck(conn net.Conn) error {
+	var sysErr error
+
+	sysConn, ok := conn.(syscall.Conn)
+	if !ok {
+		return nil
+	}
+	rawConn, err := sysConn.SyscallConn()
+	if err != nil {
+		return err
+	}
+
+	err = rawConn.Read(func(fd uintptr) bool {
+		var buf [1]byte
+		n, err := syscall.Read(int(fd), buf[:])
+		switch {
+		case n == 0 && err == nil:
+			sysErr = io.EOF
+		case n > 0:
+			sysErr = errUnexpectedRead
+		case err == syscall.EAGAIN || err == syscall.EWOULDBLOCK:
+			sysErr = nil
+		default:
+			sysErr = err
+		}
+		return true
+	})
+	if err != nil {
+		return err
+	}
+
+	return sysErr
+}
diff --git a/vendor/github.com/go-sql-driver/mysql/appengine.go b/vendor/github.com/go-sql-driver/mysql/conncheck_dummy.go
index be41f2ee6d..ea7fb607ac 100644
--- a/vendor/github.com/go-sql-driver/mysql/appengine.go
+++ b/vendor/github.com/go-sql-driver/mysql/conncheck_dummy.go
@@ -1,19 +1,17 @@
 // Go MySQL Driver - A MySQL-Driver for Go's database/sql package
 //
-// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
+// Copyright 2019 The Go-MySQL-Driver Authors. All rights reserved.
 //
 // This Source Code Form is subject to the terms of the Mozilla Public
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at http://mozilla.org/MPL/2.0/.
 
-// +build appengine
+// +build !linux,!darwin,!dragonfly,!freebsd,!netbsd,!openbsd,!solaris,!illumos
 
 package mysql
 
-import (
-	"google.golang.org/appengine/cloudsql"
-)
+import "net"
 
-func init() {
-	RegisterDial("cloudsql", cloudsql.Dial)
+func connCheck(conn net.Conn) error {
+	return nil
 }
diff --git a/vendor/github.com/go-sql-driver/mysql/connection.go b/vendor/github.com/go-sql-driver/mysql/connection.go
index e57061412b..e4bb59e67c 100644
--- a/vendor/github.com/go-sql-driver/mysql/connection.go
+++ b/vendor/github.com/go-sql-driver/mysql/connection.go
@@ -9,6 +9,8 @@
 package mysql
 
 import (
+	"context"
+	"database/sql"
 	"database/sql/driver"
 	"io"
 	"net"
@@ -17,19 +19,10 @@ import (
 	"time"
 )
 
-// a copy of context.Context for Go 1.7 and earlier
-type mysqlContext interface {
-	Done() <-chan struct{}
-	Err() error
-
-	// defined in context.Context, but not used in this driver:
-	// Deadline() (deadline time.Time, ok bool)
-	// Value(key interface{}) interface{}
-}
-
 type mysqlConn struct {
 	buf              buffer
 	netConn          net.Conn
+	rawConn          net.Conn // underlying connection when netConn is TLS connection.
 	affectedRows     uint64
 	insertId         uint64
 	cfg              *Config
@@ -40,10 +33,11 @@ type mysqlConn struct {
 	status           statusFlag
 	sequence         uint8
 	parseTime        bool
+	reset            bool // set when the Go SQL package calls ResetSession
 
 	// for context support (Go 1.8+)
 	watching bool
-	watcher  chan<- mysqlContext
+	watcher  chan<- context.Context
 	closech  chan struct{}
 	finished chan<- struct{}
 	canceled atomicError // set non-nil if conn is canceled
@@ -160,7 +154,9 @@ func (mc *mysqlConn) Prepare(query string) (driver.Stmt, error) {
 	// Send command
 	err := mc.writeCommandPacketStr(comStmtPrepare, query)
 	if err != nil {
-		return nil, mc.markBadConn(err)
+		// STMT_PREPARE is safe to retry.  So we can return ErrBadConn here.
+		errLog.Print(err)
+		return nil, driver.ErrBadConn
 	}
 
 	stmt := &mysqlStmt{
@@ -190,10 +186,10 @@ func (mc *mysqlConn) interpolateParams(query string, args []driver.Value) (strin
 		return "", driver.ErrSkip
 	}
 
-	buf := mc.buf.takeCompleteBuffer()
-	if buf == nil {
+	buf, err := mc.buf.takeCompleteBuffer()
+	if err != nil {
 		// can not take the buffer. Something must be wrong with the connection
-		errLog.Print(ErrBusyBuffer)
+		errLog.Print(err)
 		return "", ErrInvalidConn
 	}
 	buf = buf[:0]
@@ -219,6 +215,9 @@ func (mc *mysqlConn) interpolateParams(query string, args []driver.Value) (strin
 		switch v := arg.(type) {
 		case int64:
 			buf = strconv.AppendInt(buf, v, 10)
+		case uint64:
+			// Handle uint64 explicitly because our custom ConvertValue emits unsigned values
+			buf = strconv.AppendUint(buf, v, 10)
 		case float64:
 			buf = strconv.AppendFloat(buf, v, 'g', -1, 64)
 		case bool:
@@ -459,3 +458,194 @@ func (mc *mysqlConn) finish() {
 	case <-mc.closech:
 	}
 }
+
+// Ping implements driver.Pinger interface
+func (mc *mysqlConn) Ping(ctx context.Context) (err error) {
+	if mc.closed.IsSet() {
+		errLog.Print(ErrInvalidConn)
+		return driver.ErrBadConn
+	}
+
+	if err = mc.watchCancel(ctx); err != nil {
+		return
+	}
+	defer mc.finish()
+
+	if err = mc.writeCommandPacket(comPing); err != nil {
+		return mc.markBadConn(err)
+	}
+
+	return mc.readResultOK()
+}
+
+// BeginTx implements driver.ConnBeginTx interface
+func (mc *mysqlConn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
+	if err := mc.watchCancel(ctx); err != nil {
+		return nil, err
+	}
+	defer mc.finish()
+
+	if sql.IsolationLevel(opts.Isolation) != sql.LevelDefault {
+		level, err := mapIsolationLevel(opts.Isolation)
+		if err != nil {
+			return nil, err
+		}
+		err = mc.exec("SET TRANSACTION ISOLATION LEVEL " + level)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return mc.begin(opts.ReadOnly)
+}
+
+func (mc *mysqlConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) {
+	dargs, err := namedValueToValue(args)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := mc.watchCancel(ctx); err != nil {
+		return nil, err
+	}
+
+	rows, err := mc.query(query, dargs)
+	if err != nil {
+		mc.finish()
+		return nil, err
+	}
+	rows.finish = mc.finish
+	return rows, err
+}
+
+func (mc *mysqlConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
+	dargs, err := namedValueToValue(args)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := mc.watchCancel(ctx); err != nil {
+		return nil, err
+	}
+	defer mc.finish()
+
+	return mc.Exec(query, dargs)
+}
+
+func (mc *mysqlConn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
+	if err := mc.watchCancel(ctx); err != nil {
+		return nil, err
+	}
+
+	stmt, err := mc.Prepare(query)
+	mc.finish()
+	if err != nil {
+		return nil, err
+	}
+
+	select {
+	default:
+	case <-ctx.Done():
+		stmt.Close()
+		return nil, ctx.Err()
+	}
+	return stmt, nil
+}
+
+func (stmt *mysqlStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) {
+	dargs, err := namedValueToValue(args)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := stmt.mc.watchCancel(ctx); err != nil {
+		return nil, err
+	}
+
+	rows, err := stmt.query(dargs)
+	if err != nil {
+		stmt.mc.finish()
+		return nil, err
+	}
+	rows.finish = stmt.mc.finish
+	return rows, err
+}
+
+func (stmt *mysqlStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (driver.Result, error) {
+	dargs, err := namedValueToValue(args)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := stmt.mc.watchCancel(ctx); err != nil {
+		return nil, err
+	}
+	defer stmt.mc.finish()
+
+	return stmt.Exec(dargs)
+}
+
+func (mc *mysqlConn) watchCancel(ctx context.Context) error {
+	if mc.watching {
+		// Reach here if canceled,
+		// so the connection is already invalid
+		mc.cleanup()
+		return nil
+	}
+	// When ctx is already cancelled, don't watch it.
+	if err := ctx.Err(); err != nil {
+		return err
+	}
+	// When ctx is not cancellable, don't watch it.
+	if ctx.Done() == nil {
+		return nil
+	}
+	// When watcher is not alive, can't watch it.
+	if mc.watcher == nil {
+		return nil
+	}
+
+	mc.watching = true
+	mc.watcher <- ctx
+	return nil
+}
+
+func (mc *mysqlConn) startWatcher() {
+	watcher := make(chan context.Context, 1)
+	mc.watcher = watcher
+	finished := make(chan struct{})
+	mc.finished = finished
+	go func() {
+		for {
+			var ctx context.Context
+			select {
+			case ctx = <-watcher:
+			case <-mc.closech:
+				return
+			}
+
+			select {
+			case <-ctx.Done():
+				mc.cancel(ctx.Err())
+			case <-finished:
+			case <-mc.closech:
+				return
+			}
+		}
+	}()
+}
+
+func (mc *mysqlConn) CheckNamedValue(nv *driver.NamedValue) (err error) {
+	nv.Value, err = converter{}.ConvertValue(nv.Value)
+	return
+}
+
+// ResetSession implements driver.SessionResetter.
+// (From Go 1.10)
+func (mc *mysqlConn) ResetSession(ctx context.Context) error {
+	if mc.closed.IsSet() {
+		return driver.ErrBadConn
+	}
+	mc.reset = true
+	return nil
+}
diff --git a/vendor/github.com/go-sql-driver/mysql/connection_go18.go b/vendor/github.com/go-sql-driver/mysql/connection_go18.go
deleted file mode 100644
index ce52c7d167..0000000000
--- a/vendor/github.com/go-sql-driver/mysql/connection_go18.go
+++ /dev/null
@@ -1,207 +0,0 @@
-// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
-//
-// Copyright 2012 The Go-MySQL-Driver Authors. All rights reserved.
-//
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this file,
-// You can obtain one at http://mozilla.org/MPL/2.0/.
-
-// +build go1.8
-
-package mysql
-
-import (
-	"context"
-	"database/sql"
-	"database/sql/driver"
-)
-
-// Ping implements driver.Pinger interface
-func (mc *mysqlConn) Ping(ctx context.Context) (err error) {
-	if mc.closed.IsSet() {
-		errLog.Print(ErrInvalidConn)
-		return driver.ErrBadConn
-	}
-
-	if err = mc.watchCancel(ctx); err != nil {
-		return
-	}
-	defer mc.finish()
-
-	if err = mc.writeCommandPacket(comPing); err != nil {
-		return
-	}
-
-	return mc.readResultOK()
-}
-
-// BeginTx implements driver.ConnBeginTx interface
-func (mc *mysqlConn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
-	if err := mc.watchCancel(ctx); err != nil {
-		return nil, err
-	}
-	defer mc.finish()
-
-	if sql.IsolationLevel(opts.Isolation) != sql.LevelDefault {
-		level, err := mapIsolationLevel(opts.Isolation)
-		if err != nil {
-			return nil, err
-		}
-		err = mc.exec("SET TRANSACTION ISOLATION LEVEL " + level)
-		if err != nil {
-			return nil, err
-		}
-	}
-
-	return mc.begin(opts.ReadOnly)
-}
-
-func (mc *mysqlConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) {
-	dargs, err := namedValueToValue(args)
-	if err != nil {
-		return nil, err
-	}
-
-	if err := mc.watchCancel(ctx); err != nil {
-		return nil, err
-	}
-
-	rows, err := mc.query(query, dargs)
-	if err != nil {
-		mc.finish()
-		return nil, err
-	}
-	rows.finish = mc.finish
-	return rows, err
-}
-
-func (mc *mysqlConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
-	dargs, err := namedValueToValue(args)
-	if err != nil {
-		return nil, err
-	}
-
-	if err := mc.watchCancel(ctx); err != nil {
-		return nil, err
-	}
-	defer mc.finish()
-
-	return mc.Exec(query, dargs)
-}
-
-func (mc *mysqlConn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
-	if err := mc.watchCancel(ctx); err != nil {
-		return nil, err
-	}
-
-	stmt, err := mc.Prepare(query)
-	mc.finish()
-	if err != nil {
-		return nil, err
-	}
-
-	select {
-	default:
-	case <-ctx.Done():
-		stmt.Close()
-		return nil, ctx.Err()
-	}
-	return stmt, nil
-}
-
-func (stmt *mysqlStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) {
-	dargs, err := namedValueToValue(args)
-	if err != nil {
-		return nil, err
-	}
-
-	if err := stmt.mc.watchCancel(ctx); err != nil {
-		return nil, err
-	}
-
-	rows, err := stmt.query(dargs)
-	if err != nil {
-		stmt.mc.finish()
-		return nil, err
-	}
-	rows.finish = stmt.mc.finish
-	return rows, err
-}
-
-func (stmt *mysqlStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (driver.Result, error) {
-	dargs, err := namedValueToValue(args)
-	if err != nil {
-		return nil, err
-	}
-
-	if err := stmt.mc.watchCancel(ctx); err != nil {
-		return nil, err
-	}
-	defer stmt.mc.finish()
-
-	return stmt.Exec(dargs)
-}
-
-func (mc *mysqlConn) watchCancel(ctx context.Context) error {
-	if mc.watching {
-		// Reach here if canceled,
-		// so the connection is already invalid
-		mc.cleanup()
-		return nil
-	}
-	// When ctx is already cancelled, don't watch it.
-	if err := ctx.Err(); err != nil {
-		return err
-	}
-	// When ctx is not cancellable, don't watch it.
-	if ctx.Done() == nil {
-		return nil
-	}
-	// When watcher is not alive, can't watch it.
-	if mc.watcher == nil {
-		return nil
-	}
-
-	mc.watching = true
-	mc.watcher <- ctx
-	return nil
-}
-
-func (mc *mysqlConn) startWatcher() {
-	watcher := make(chan mysqlContext, 1)
-	mc.watcher = watcher
-	finished := make(chan struct{})
-	mc.finished = finished
-	go func() {
-		for {
-			var ctx mysqlContext
-			select {
-			case ctx = <-watcher:
-			case <-mc.closech:
-				return
-			}
-
-			select {
-			case <-ctx.Done():
-				mc.cancel(ctx.Err())
-			case <-finished:
-			case <-mc.closech:
-				return
-			}
-		}
-	}()
-}
-
-func (mc *mysqlConn) CheckNamedValue(nv *driver.NamedValue) (err error) {
-	nv.Value, err = converter{}.ConvertValue(nv.Value)
-	return
-}
-
-// ResetSession implements driver.SessionResetter.
-// (From Go 1.10)
-func (mc *mysqlConn) ResetSession(ctx context.Context) error {
-	if mc.closed.IsSet() {
-		return driver.ErrBadConn
-	}
-	return nil
-}
diff --git a/vendor/github.com/go-sql-driver/mysql/connector.go b/vendor/github.com/go-sql-driver/mysql/connector.go
new file mode 100644
index 0000000000..d567b4e4fc
--- /dev/null
+++ b/vendor/github.com/go-sql-driver/mysql/connector.go
@@ -0,0 +1,146 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2018 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+import (
+	"context"
+	"database/sql/driver"
+	"net"
+)
+
+type connector struct {
+	cfg *Config // immutable private copy.
+}
+
+// Connect implements driver.Connector interface.
+// Connect returns a connection to the database.
+func (c *connector) Connect(ctx context.Context) (driver.Conn, error) {
+	var err error
+
+	// New mysqlConn
+	mc := &mysqlConn{
+		maxAllowedPacket: maxPacketSize,
+		maxWriteSize:     maxPacketSize - 1,
+		closech:          make(chan struct{}),
+		cfg:              c.cfg,
+	}
+	mc.parseTime = mc.cfg.ParseTime
+
+	// Connect to Server
+	dialsLock.RLock()
+	dial, ok := dials[mc.cfg.Net]
+	dialsLock.RUnlock()
+	if ok {
+		dctx := ctx
+		if mc.cfg.Timeout > 0 {
+			var cancel context.CancelFunc
+			dctx, cancel = context.WithTimeout(ctx, c.cfg.Timeout)
+			defer cancel()
+		}
+		mc.netConn, err = dial(dctx, mc.cfg.Addr)
+	} else {
+		nd := net.Dialer{Timeout: mc.cfg.Timeout}
+		mc.netConn, err = nd.DialContext(ctx, mc.cfg.Net, mc.cfg.Addr)
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	// Enable TCP Keepalives on TCP connections
+	if tc, ok := mc.netConn.(*net.TCPConn); ok {
+		if err := tc.SetKeepAlive(true); err != nil {
+			// Don't send COM_QUIT before handshake.
+			mc.netConn.Close()
+			mc.netConn = nil
+			return nil, err
+		}
+	}
+
+	// Call startWatcher for context support (From Go 1.8)
+	mc.startWatcher()
+	if err := mc.watchCancel(ctx); err != nil {
+		mc.cleanup()
+		return nil, err
+	}
+	defer mc.finish()
+
+	mc.buf = newBuffer(mc.netConn)
+
+	// Set I/O timeouts
+	mc.buf.timeout = mc.cfg.ReadTimeout
+	mc.writeTimeout = mc.cfg.WriteTimeout
+
+	// Reading Handshake Initialization Packet
+	authData, plugin, err := mc.readHandshakePacket()
+	if err != nil {
+		mc.cleanup()
+		return nil, err
+	}
+
+	if plugin == "" {
+		plugin = defaultAuthPlugin
+	}
+
+	// Send Client Authentication Packet
+	authResp, err := mc.auth(authData, plugin)
+	if err != nil {
+		// try the default auth plugin, if using the requested plugin failed
+		errLog.Print("could not use requested auth plugin '"+plugin+"': ", err.Error())
+		plugin = defaultAuthPlugin
+		authResp, err = mc.auth(authData, plugin)
+		if err != nil {
+			mc.cleanup()
+			return nil, err
+		}
+	}
+	if err = mc.writeHandshakeResponsePacket(authResp, plugin); err != nil {
+		mc.cleanup()
+		return nil, err
+	}
+
+	// Handle response to auth packet, switch methods if possible
+	if err = mc.handleAuthResult(authData, plugin); err != nil {
+		// Authentication failed and MySQL has already closed the connection
+		// (https://dev.mysql.com/doc/internals/en/authentication-fails.html).
+		// Do not send COM_QUIT, just cleanup and return the error.
+		mc.cleanup()
+		return nil, err
+	}
+
+	if mc.cfg.MaxAllowedPacket > 0 {
+		mc.maxAllowedPacket = mc.cfg.MaxAllowedPacket
+	} else {
+		// Get max allowed packet size
+		maxap, err := mc.getSystemVar("max_allowed_packet")
+		if err != nil {
+			mc.Close()
+			return nil, err
+		}
+		mc.maxAllowedPacket = stringToInt(maxap) - 1
+	}
+	if mc.maxAllowedPacket < maxPacketSize {
+		mc.maxWriteSize = mc.maxAllowedPacket
+	}
+
+	// Handle DSN Params
+	err = mc.handleParams()
+	if err != nil {
+		mc.Close()
+		return nil, err
+	}
+
+	return mc, nil
+}
+
+// Driver implements driver.Connector interface.
+// Driver returns &MySQLDriver{}.
+func (c *connector) Driver() driver.Driver {
+	return &MySQLDriver{}
+}
diff --git a/vendor/github.com/go-sql-driver/mysql/driver.go b/vendor/github.com/go-sql-driver/mysql/driver.go
index e9ede2c8da..c1bdf1199b 100644
--- a/vendor/github.com/go-sql-driver/mysql/driver.go
+++ b/vendor/github.com/go-sql-driver/mysql/driver.go
@@ -17,156 +17,91 @@
 package mysql
 
 import (
+	"context"
 	"database/sql"
 	"database/sql/driver"
 	"net"
 	"sync"
 )
 
-// watcher interface is used for context support (From Go 1.8)
-type watcher interface {
-	startWatcher()
-}
-
 // MySQLDriver is exported to make the driver directly accessible.
 // In general the driver is used via the database/sql package.
 type MySQLDriver struct{}
 
 // DialFunc is a function which can be used to establish the network connection.
 // Custom dial functions must be registered with RegisterDial
+//
+// Deprecated: users should register a DialContextFunc instead
 type DialFunc func(addr string) (net.Conn, error)
 
+// DialContextFunc is a function which can be used to establish the network connection.
+// Custom dial functions must be registered with RegisterDialContext
+type DialContextFunc func(ctx context.Context, addr string) (net.Conn, error)
+
 var (
 	dialsLock sync.RWMutex
-	dials     map[string]DialFunc
+	dials     map[string]DialContextFunc
 )
 
-// RegisterDial registers a custom dial function. It can then be used by the
+// RegisterDialContext registers a custom dial function. It can then be used by the
 // network address mynet(addr), where mynet is the registered new network.
-// addr is passed as a parameter to the dial function.
-func RegisterDial(net string, dial DialFunc) {
+// The current context for the connection and its address is passed to the dial function.
+func RegisterDialContext(net string, dial DialContextFunc) {
 	dialsLock.Lock()
 	defer dialsLock.Unlock()
 	if dials == nil {
-		dials = make(map[string]DialFunc)
+		dials = make(map[string]DialContextFunc)
 	}
 	dials[net] = dial
 }
 
+// RegisterDial registers a custom dial function. It can then be used by the
+// network address mynet(addr), where mynet is the registered new network.
+// addr is passed as a parameter to the dial function.
+//
+// Deprecated: users should call RegisterDialContext instead
+func RegisterDial(network string, dial DialFunc) {
+	RegisterDialContext(network, func(_ context.Context, addr string) (net.Conn, error) {
+		return dial(addr)
+	})
+}
+
 // Open new Connection.
 // See https://github.com/go-sql-driver/mysql#dsn-data-source-name for how
-// the DSN string is formated
+// the DSN string is formatted
 func (d MySQLDriver) Open(dsn string) (driver.Conn, error) {
-	var err error
-
-	// New mysqlConn
-	mc := &mysqlConn{
-		maxAllowedPacket: maxPacketSize,
-		maxWriteSize:     maxPacketSize - 1,
-		closech:          make(chan struct{}),
-	}
-	mc.cfg, err = ParseDSN(dsn)
-	if err != nil {
-		return nil, err
-	}
-	mc.parseTime = mc.cfg.ParseTime
-
-	// Connect to Server
-	dialsLock.RLock()
-	dial, ok := dials[mc.cfg.Net]
-	dialsLock.RUnlock()
-	if ok {
-		mc.netConn, err = dial(mc.cfg.Addr)
-	} else {
-		nd := net.Dialer{Timeout: mc.cfg.Timeout}
-		mc.netConn, err = nd.Dial(mc.cfg.Net, mc.cfg.Addr)
-	}
-	if err != nil {
-		return nil, err
-	}
-
-	// Enable TCP Keepalives on TCP connections
-	if tc, ok := mc.netConn.(*net.TCPConn); ok {
-		if err := tc.SetKeepAlive(true); err != nil {
-			// Don't send COM_QUIT before handshake.
-			mc.netConn.Close()
-			mc.netConn = nil
-			return nil, err
-		}
-	}
-
-	// Call startWatcher for context support (From Go 1.8)
-	if s, ok := interface{}(mc).(watcher); ok {
-		s.startWatcher()
-	}
-
-	mc.buf = newBuffer(mc.netConn)
-
-	// Set I/O timeouts
-	mc.buf.timeout = mc.cfg.ReadTimeout
-	mc.writeTimeout = mc.cfg.WriteTimeout
-
-	// Reading Handshake Initialization Packet
-	authData, plugin, err := mc.readHandshakePacket()
+	cfg, err := ParseDSN(dsn)
 	if err != nil {
-		mc.cleanup()
 		return nil, err
 	}
-	if plugin == "" {
-		plugin = defaultAuthPlugin
+	c := &connector{
+		cfg: cfg,
 	}
+	return c.Connect(context.Background())
+}
 
-	// Send Client Authentication Packet
-	authResp, err := mc.auth(authData, plugin)
-	if err != nil {
-		// try the default auth plugin, if using the requested plugin failed
-		errLog.Print("could not use requested auth plugin '"+plugin+"': ", err.Error())
-		plugin = defaultAuthPlugin
-		authResp, err = mc.auth(authData, plugin)
-		if err != nil {
-			mc.cleanup()
-			return nil, err
-		}
-	}
-	if err = mc.writeHandshakeResponsePacket(authResp, plugin); err != nil {
-		mc.cleanup()
-		return nil, err
-	}
+func init() {
+	sql.Register("mysql", &MySQLDriver{})
+}
 
-	// Handle response to auth packet, switch methods if possible
-	if err = mc.handleAuthResult(authData, plugin); err != nil {
-		// Authentication failed and MySQL has already closed the connection
-		// (https://dev.mysql.com/doc/internals/en/authentication-fails.html).
-		// Do not send COM_QUIT, just cleanup and return the error.
-		mc.cleanup()
+// NewConnector returns new driver.Connector.
+func NewConnector(cfg *Config) (driver.Connector, error) {
+	cfg = cfg.Clone()
+	// normalize the contents of cfg so calls to NewConnector have the same
+	// behavior as MySQLDriver.OpenConnector
+	if err := cfg.normalize(); err != nil {
 		return nil, err
 	}
+	return &connector{cfg: cfg}, nil
+}
 
-	if mc.cfg.MaxAllowedPacket > 0 {
-		mc.maxAllowedPacket = mc.cfg.MaxAllowedPacket
-	} else {
-		// Get max allowed packet size
-		maxap, err := mc.getSystemVar("max_allowed_packet")
-		if err != nil {
-			mc.Close()
-			return nil, err
-		}
-		mc.maxAllowedPacket = stringToInt(maxap) - 1
-	}
-	if mc.maxAllowedPacket < maxPacketSize {
-		mc.maxWriteSize = mc.maxAllowedPacket
-	}
-
-	// Handle DSN Params
-	err = mc.handleParams()
+// OpenConnector implements driver.DriverContext.
+func (d MySQLDriver) OpenConnector(dsn string) (driver.Connector, error) {
+	cfg, err := ParseDSN(dsn)
 	if err != nil {
-		mc.Close()
 		return nil, err
 	}
-
-	return mc, nil
-}
-
-func init() {
-	sql.Register("mysql", &MySQLDriver{})
+	return &connector{
+		cfg: cfg,
+	}, nil
 }
diff --git a/vendor/github.com/go-sql-driver/mysql/dsn.go b/vendor/github.com/go-sql-driver/mysql/dsn.go
index be014babe3..75c8c24896 100644
--- a/vendor/github.com/go-sql-driver/mysql/dsn.go
+++ b/vendor/github.com/go-sql-driver/mysql/dsn.go
@@ -14,6 +14,7 @@ import (
 	"crypto/tls"
 	"errors"
 	"fmt"
+	"math/big"
 	"net"
 	"net/url"
 	"sort"
@@ -54,6 +55,7 @@ type Config struct {
 	AllowCleartextPasswords bool // Allows the cleartext client side plugin
 	AllowNativePasswords    bool // Allows the native password authentication method
 	AllowOldPasswords       bool // Allows the old insecure password method
+	CheckConnLiveness       bool // Check connections for liveness before using them
 	ClientFoundRows         bool // Return number of matching rows instead of rows changed
 	ColumnsWithAlias        bool // Prepend table alias to column names
 	InterpolateParams       bool // Interpolate placeholders into query string
@@ -69,9 +71,30 @@ func NewConfig() *Config {
 		Loc:                  time.UTC,
 		MaxAllowedPacket:     defaultMaxAllowedPacket,
 		AllowNativePasswords: true,
+		CheckConnLiveness:    true,
 	}
 }
 
+func (cfg *Config) Clone() *Config {
+	cp := *cfg
+	if cp.tls != nil {
+		cp.tls = cfg.tls.Clone()
+	}
+	if len(cp.Params) > 0 {
+		cp.Params = make(map[string]string, len(cfg.Params))
+		for k, v := range cfg.Params {
+			cp.Params[k] = v
+		}
+	}
+	if cfg.pubKey != nil {
+		cp.pubKey = &rsa.PublicKey{
+			N: new(big.Int).Set(cfg.pubKey.N),
+			E: cfg.pubKey.E,
+		}
+	}
+	return &cp
+}
+
 func (cfg *Config) normalize() error {
 	if cfg.InterpolateParams && unsafeCollations[cfg.Collation] {
 		return errInvalidDSNUnsafeCollation
@@ -92,23 +115,54 @@ func (cfg *Config) normalize() error {
 		default:
 			return errors.New("default addr for network '" + cfg.Net + "' unknown")
 		}
-
 	} else if cfg.Net == "tcp" {
 		cfg.Addr = ensureHavePort(cfg.Addr)
 	}
 
-	if cfg.tls != nil {
-		if cfg.tls.ServerName == "" && !cfg.tls.InsecureSkipVerify {
-			host, _, err := net.SplitHostPort(cfg.Addr)
-			if err == nil {
-				cfg.tls.ServerName = host
-			}
+	switch cfg.TLSConfig {
+	case "false", "":
+		// don't set anything
+	case "true":
+		cfg.tls = &tls.Config{}
+	case "skip-verify", "preferred":
+		cfg.tls = &tls.Config{InsecureSkipVerify: true}
+	default:
+		cfg.tls = getTLSConfigClone(cfg.TLSConfig)
+		if cfg.tls == nil {
+			return errors.New("invalid value / unknown config name: " + cfg.TLSConfig)
+		}
+	}
+
+	if cfg.tls != nil && cfg.tls.ServerName == "" && !cfg.tls.InsecureSkipVerify {
+		host, _, err := net.SplitHostPort(cfg.Addr)
+		if err == nil {
+			cfg.tls.ServerName = host
+		}
+	}
+
+	if cfg.ServerPubKey != "" {
+		cfg.pubKey = getServerPubKey(cfg.ServerPubKey)
+		if cfg.pubKey == nil {
+			return errors.New("invalid value / unknown server pub key name: " + cfg.ServerPubKey)
 		}
 	}
 
 	return nil
 }
 
+func writeDSNParam(buf *bytes.Buffer, hasParam *bool, name, value string) {
+	buf.Grow(1 + len(name) + 1 + len(value))
+	if !*hasParam {
+		*hasParam = true
+		buf.WriteByte('?')
+	} else {
+		buf.WriteByte('&')
+	}
+	buf.WriteString(name)
+	buf.WriteByte('=')
+	buf.WriteString(value)
+}
+
 // FormatDSN formats the given Config into a DSN string which can be passed to
 // the driver.
 func (cfg *Config) FormatDSN() string {
@@ -147,165 +201,75 @@ func (cfg *Config) FormatDSN() string {
 	}
 
 	if cfg.AllowCleartextPasswords {
-		if hasParam {
-			buf.WriteString("&allowCleartextPasswords=true")
-		} else {
-			hasParam = true
-			buf.WriteString("?allowCleartextPasswords=true")
-		}
+		writeDSNParam(&buf, &hasParam, "allowCleartextPasswords", "true")
 	}
 
 	if !cfg.AllowNativePasswords {
-		if hasParam {
-			buf.WriteString("&allowNativePasswords=false")
-		} else {
-			hasParam = true
-			buf.WriteString("?allowNativePasswords=false")
-		}
+		writeDSNParam(&buf, &hasParam, "allowNativePasswords", "false")
 	}
 
 	if cfg.AllowOldPasswords {
-		if hasParam {
-			buf.WriteString("&allowOldPasswords=true")
-		} else {
-			hasParam = true
-			buf.WriteString("?allowOldPasswords=true")
-		}
+		writeDSNParam(&buf, &hasParam, "allowOldPasswords", "true")
+	}
+
+	if !cfg.CheckConnLiveness {
+		writeDSNParam(&buf, &hasParam, "checkConnLiveness", "false")
 	}
 
 	if cfg.ClientFoundRows {
-		if hasParam {
-			buf.WriteString("&clientFoundRows=true")
-		} else {
-			hasParam = true
-			buf.WriteString("?clientFoundRows=true")
-		}
+		writeDSNParam(&buf, &hasParam, "clientFoundRows", "true")
 	}
 
 	if col := cfg.Collation; col != defaultCollation && len(col) > 0 {
-		if hasParam {
-			buf.WriteString("&collation=")
-		} else {
-			hasParam = true
-			buf.WriteString("?collation=")
-		}
-		buf.WriteString(col)
+		writeDSNParam(&buf, &hasParam, "collation", col)
 	}
 
 	if cfg.ColumnsWithAlias {
-		if hasParam {
-			buf.WriteString("&columnsWithAlias=true")
-		} else {
-			hasParam = true
-			buf.WriteString("?columnsWithAlias=true")
-		}
+		writeDSNParam(&buf, &hasParam, "columnsWithAlias", "true")
 	}
 
 	if cfg.InterpolateParams {
-		if hasParam {
-			buf.WriteString("&interpolateParams=true")
-		} else {
-			hasParam = true
-			buf.WriteString("?interpolateParams=true")
-		}
+		writeDSNParam(&buf, &hasParam, "interpolateParams", "true")
 	}
 
 	if cfg.Loc != time.UTC && cfg.Loc != nil {
-		if hasParam {
-			buf.WriteString("&loc=")
-		} else {
-			hasParam = true
-			buf.WriteString("?loc=")
-		}
-		buf.WriteString(url.QueryEscape(cfg.Loc.String()))
+		writeDSNParam(&buf, &hasParam, "loc", url.QueryEscape(cfg.Loc.String()))
 	}
 
 	if cfg.MultiStatements {
-		if hasParam {
-			buf.WriteString("&multiStatements=true")
-		} else {
-			hasParam = true
-			buf.WriteString("?multiStatements=true")
-		}
+		writeDSNParam(&buf, &hasParam, "multiStatements", "true")
 	}
 
 	if cfg.ParseTime {
-		if hasParam {
-			buf.WriteString("&parseTime=true")
-		} else {
-			hasParam = true
-			buf.WriteString("?parseTime=true")
-		}
+		writeDSNParam(&buf, &hasParam, "parseTime", "true")
 	}
 
 	if cfg.ReadTimeout > 0 {
-		if hasParam {
-			buf.WriteString("&readTimeout=")
-		} else {
-			hasParam = true
-			buf.WriteString("?readTimeout=")
-		}
-		buf.WriteString(cfg.ReadTimeout.String())
+		writeDSNParam(&buf, &hasParam, "readTimeout", cfg.ReadTimeout.String())
 	}
 
 	if cfg.RejectReadOnly {
-		if hasParam {
-			buf.WriteString("&rejectReadOnly=true")
-		} else {
-			hasParam = true
-			buf.WriteString("?rejectReadOnly=true")
-		}
+		writeDSNParam(&buf, &hasParam, "rejectReadOnly", "true")
 	}
 
 	if len(cfg.ServerPubKey) > 0 {
-		if hasParam {
-			buf.WriteString("&serverPubKey=")
-		} else {
-			hasParam = true
-			buf.WriteString("?serverPubKey=")
-		}
-		buf.WriteString(url.QueryEscape(cfg.ServerPubKey))
+		writeDSNParam(&buf, &hasParam, "serverPubKey", url.QueryEscape(cfg.ServerPubKey))
 	}
 
 	if cfg.Timeout > 0 {
-		if hasParam {
-			buf.WriteString("&timeout=")
-		} else {
-			hasParam = true
-			buf.WriteString("?timeout=")
-		}
-		buf.WriteString(cfg.Timeout.String())
+		writeDSNParam(&buf, &hasParam, "timeout", cfg.Timeout.String())
 	}
 
 	if len(cfg.TLSConfig) > 0 {
-		if hasParam {
-			buf.WriteString("&tls=")
-		} else {
-			hasParam = true
-			buf.WriteString("?tls=")
-		}
-		buf.WriteString(url.QueryEscape(cfg.TLSConfig))
+		writeDSNParam(&buf, &hasParam, "tls", url.QueryEscape(cfg.TLSConfig))
 	}
 
 	if cfg.WriteTimeout > 0 {
-		if hasParam {
-			buf.WriteString("&writeTimeout=")
-		} else {
-			hasParam = true
-			buf.WriteString("?writeTimeout=")
-		}
-		buf.WriteString(cfg.WriteTimeout.String())
+		writeDSNParam(&buf, &hasParam, "writeTimeout", cfg.WriteTimeout.String())
 	}
 
 	if cfg.MaxAllowedPacket != defaultMaxAllowedPacket {
-		if hasParam {
-			buf.WriteString("&maxAllowedPacket=")
-		} else {
-			hasParam = true
-			buf.WriteString("?maxAllowedPacket=")
-		}
-		buf.WriteString(strconv.Itoa(cfg.MaxAllowedPacket))
-
+		writeDSNParam(&buf, &hasParam, "maxAllowedPacket", strconv.Itoa(cfg.MaxAllowedPacket))
 	}
 
 	// other params
@@ -316,16 +280,7 @@ func (cfg *Config) FormatDSN() string {
 		}
 		sort.Strings(params)
 		for _, param := range params {
-			if hasParam {
-				buf.WriteByte('&')
-			} else {
-				hasParam = true
-				buf.WriteByte('?')
-			}
-
-			buf.WriteString(param)
-			buf.WriteByte('=')
-			buf.WriteString(url.QueryEscape(cfg.Params[param]))
+			writeDSNParam(&buf, &hasParam, param, url.QueryEscape(cfg.Params[param]))
 		}
 	}
 
@@ -452,6 +407,14 @@ func parseDSNParams(cfg *Config, params string) (err error) {
 				return errors.New("invalid bool value: " + value)
 			}
 
+		// Check connections for Liveness before using them
+		case "checkConnLiveness":
+			var isBool bool
+			cfg.CheckConnLiveness, isBool = readBool(value)
+			if !isBool {
+				return errors.New("invalid bool value: " + value)
+			}
+
 		// Switch "rowsAffected" mode
 		case "clientFoundRows":
 			var isBool bool
@@ -531,13 +494,7 @@ func parseDSNParams(cfg *Config, params string) (err error) {
 			if err != nil {
 				return fmt.Errorf("invalid value for server pub key name: %v", err)
 			}
-
-			if pubKey := getServerPubKey(name); pubKey != nil {
-				cfg.ServerPubKey = name
-				cfg.pubKey = pubKey
-			} else {
-				return errors.New("invalid value / unknown server pub key name: " + name)
-			}
+			cfg.ServerPubKey = name
 
 		// Strict mode
 		case "strict":
@@ -556,25 +513,17 @@ func parseDSNParams(cfg *Config, params string) (err error) {
 			if isBool {
 				if boolValue {
 					cfg.TLSConfig = "true"
-					cfg.tls = &tls.Config{}
 				} else {
 					cfg.TLSConfig = "false"
 				}
-			} else if vl := strings.ToLower(value); vl == "skip-verify" {
+			} else if vl := strings.ToLower(value); vl == "skip-verify" || vl == "preferred" {
 				cfg.TLSConfig = vl
-				cfg.tls = &tls.Config{InsecureSkipVerify: true}
 			} else {
 				name, err := url.QueryUnescape(value)
 				if err != nil {
 					return fmt.Errorf("invalid value for TLS config name: %v", err)
 				}
-
-				if tlsConfig := getTLSConfigClone(name); tlsConfig != nil {
-					cfg.TLSConfig = name
-					cfg.tls = tlsConfig
-				} else {
-					return errors.New("invalid value / unknown config name: " + name)
-				}
+				cfg.TLSConfig = name
 			}
 
 		// I/O write Timeout
diff --git a/vendor/github.com/go-sql-driver/mysql/go.mod b/vendor/github.com/go-sql-driver/mysql/go.mod
new file mode 100644
index 0000000000..fffbf6a909
--- /dev/null
+++ b/vendor/github.com/go-sql-driver/mysql/go.mod
@@ -0,0 +1,3 @@
+module github.com/go-sql-driver/mysql
+
+go 1.10
diff --git a/vendor/github.com/go-sql-driver/mysql/nulltime.go b/vendor/github.com/go-sql-driver/mysql/nulltime.go
new file mode 100644
index 0000000000..afa8a89e9a
--- /dev/null
+++ b/vendor/github.com/go-sql-driver/mysql/nulltime.go
@@ -0,0 +1,50 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package mysql
+
+import (
+	"database/sql/driver"
+	"fmt"
+	"time"
+)
+
+// Scan implements the Scanner interface.
+// The value type must be time.Time or string / []byte (formatted time-string),
+// otherwise Scan fails.
+func (nt *NullTime) Scan(value interface{}) (err error) {
+	if value == nil {
+		nt.Time, nt.Valid = time.Time{}, false
+		return
+	}
+
+	switch v := value.(type) {
+	case time.Time:
+		nt.Time, nt.Valid = v, true
+		return
+	case []byte:
+		nt.Time, err = parseDateTime(string(v), time.UTC)
+		nt.Valid = (err == nil)
+		return
+	case string:
+		nt.Time, err = parseDateTime(v, time.UTC)
+		nt.Valid = (err == nil)
+		return
+	}
+
+	nt.Valid = false
+	return fmt.Errorf("Can't convert %T to time.Time", value)
+}
+
+// Value implements the driver Valuer interface.
+func (nt NullTime) Value() (driver.Value, error) {
+	if !nt.Valid {
+		return nil, nil
+	}
+	return nt.Time, nil
+}
diff --git a/vendor/github.com/go-sql-driver/mysql/nulltime_go113.go b/vendor/github.com/go-sql-driver/mysql/nulltime_go113.go
new file mode 100644
index 0000000000..c392594dd4
--- /dev/null
+++ b/vendor/github.com/go-sql-driver/mysql/nulltime_go113.go
@@ -0,0 +1,31 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// +build go1.13
+
+package mysql
+
+import (
+	"database/sql"
+)
+
+// NullTime represents a time.Time that may be NULL.
+// NullTime implements the Scanner interface so
+// it can be used as a scan destination:
+//
+//  var nt NullTime
+//  err := db.QueryRow("SELECT time FROM foo WHERE id=?", id).Scan(&nt)
+//  ...
+//  if nt.Valid {
+//     // use nt.Time
+//  } else {
+//     // NULL value
+//  }
+//
+// This NullTime implementation is not driver-specific
+type NullTime sql.NullTime
diff --git a/vendor/github.com/go-sql-driver/mysql/nulltime_legacy.go b/vendor/github.com/go-sql-driver/mysql/nulltime_legacy.go
new file mode 100644
index 0000000000..86d159d441
--- /dev/null
+++ b/vendor/github.com/go-sql-driver/mysql/nulltime_legacy.go
@@ -0,0 +1,34 @@
+// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
+//
+// Copyright 2013 The Go-MySQL-Driver Authors. All rights reserved.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// +build !go1.13
+
+package mysql
+
+import (
+	"time"
+)
+
+// NullTime represents a time.Time that may be NULL.
+// NullTime implements the Scanner interface so
+// it can be used as a scan destination:
+//
+//  var nt NullTime
+//  err := db.QueryRow("SELECT time FROM foo WHERE id=?", id).Scan(&nt)
+//  ...
+//  if nt.Valid {
+//     // use nt.Time
+//  } else {
+//     // NULL value
+//  }
+//
+// This NullTime implementation is not driver-specific
+type NullTime struct {
+	Time  time.Time
+	Valid bool // Valid is true if Time is not NULL
+}
diff --git a/vendor/github.com/go-sql-driver/mysql/packets.go b/vendor/github.com/go-sql-driver/mysql/packets.go
index 9ed6408509..82ad7a2009 100644
--- a/vendor/github.com/go-sql-driver/mysql/packets.go
+++ b/vendor/github.com/go-sql-driver/mysql/packets.go
@@ -51,7 +51,7 @@ func (mc *mysqlConn) readPacket() ([]byte, error) {
 		mc.sequence++
 
 		// packets with length 0 terminate a previous packet which is a
-		// multiple of (2^24)−1 bytes long
+		// multiple of (2^24)-1 bytes long
 		if pktLen == 0 {
 			// there was no previous packet
 			if prevData == nil {
@@ -96,6 +96,35 @@ func (mc *mysqlConn) writePacket(data []byte) error {
 		return ErrPktTooLarge
 	}
 
+	// Perform a stale connection check. We only perform this check for
+	// the first query on a connection that has been checked out of the
+	// connection pool: a fresh connection from the pool is more likely
+	// to be stale, and it has not performed any previous writes that
+	// could cause data corruption, so it's safe to return ErrBadConn
+	// if the check fails.
+	if mc.reset {
+		mc.reset = false
+		conn := mc.netConn
+		if mc.rawConn != nil {
+			conn = mc.rawConn
+		}
+		var err error
+		// If this connection has a ReadTimeout which we've been setting on
+		// reads, reset it to its default value before we attempt a non-blocking
+		// read, otherwise the scheduler will just time us out before we can read
+		if mc.cfg.ReadTimeout != 0 {
+			err = conn.SetReadDeadline(time.Time{})
+		}
+		if err == nil && mc.cfg.CheckConnLiveness {
+			err = connCheck(conn)
+		}
+		if err != nil {
+			errLog.Print("closing bad idle connection: ", err)
+			mc.Close()
+			return driver.ErrBadConn
+		}
+	}
+
 	for {
 		var size int
 		if pktLen >= maxPacketSize {
@@ -194,7 +223,11 @@ func (mc *mysqlConn) readHandshakePacket() (data []byte, plugin string, err erro
 		return nil, "", ErrOldProtocol
 	}
 	if mc.flags&clientSSL == 0 && mc.cfg.tls != nil {
-		return nil, "", ErrNoTLS
+		if mc.cfg.TLSConfig == "preferred" {
+			mc.cfg.tls = nil
+		} else {
+			return nil, "", ErrNoTLS
+		}
 	}
 	pos += 2
 
@@ -286,10 +319,10 @@ func (mc *mysqlConn) writeHandshakeResponsePacket(authResp []byte, plugin string
 	}
 
 	// Calculate packet length and get buffer with that size
-	data := mc.buf.takeSmallBuffer(pktLen + 4)
-	if data == nil {
+	data, err := mc.buf.takeSmallBuffer(pktLen + 4)
+	if err != nil {
 		// cannot take the buffer. Something must be wrong with the connection
-		errLog.Print(ErrBusyBuffer)
+		errLog.Print(err)
 		return errBadConnNoWrite
 	}
 
@@ -328,6 +361,7 @@ func (mc *mysqlConn) writeHandshakeResponsePacket(authResp []byte, plugin string
 		if err := tlsConn.Handshake(); err != nil {
 			return err
 		}
+		mc.rawConn = mc.netConn
 		mc.netConn = tlsConn
 		mc.buf.nc = tlsConn
 	}
@@ -367,10 +401,10 @@ func (mc *mysqlConn) writeHandshakeResponsePacket(authResp []byte, plugin string
 // http://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::AuthSwitchResponse
 func (mc *mysqlConn) writeAuthSwitchPacket(authData []byte) error {
 	pktLen := 4 + len(authData)
-	data := mc.buf.takeSmallBuffer(pktLen)
-	if data == nil {
+	data, err := mc.buf.takeSmallBuffer(pktLen)
+	if err != nil {
 		// cannot take the buffer. Something must be wrong with the connection
-		errLog.Print(ErrBusyBuffer)
+		errLog.Print(err)
 		return errBadConnNoWrite
 	}
 
@@ -387,10 +421,10 @@ func (mc *mysqlConn) writeCommandPacket(command byte) error {
 	// Reset Packet Sequence
 	mc.sequence = 0
 
-	data := mc.buf.takeSmallBuffer(4 + 1)
-	if data == nil {
+	data, err := mc.buf.takeSmallBuffer(4 + 1)
+	if err != nil {
 		// cannot take the buffer. Something must be wrong with the connection
-		errLog.Print(ErrBusyBuffer)
+		errLog.Print(err)
 		return errBadConnNoWrite
 	}
 
@@ -406,10 +440,10 @@ func (mc *mysqlConn) writeCommandPacketStr(command byte, arg string) error {
 	mc.sequence = 0
 
 	pktLen := 1 + len(arg)
-	data := mc.buf.takeBuffer(pktLen + 4)
-	if data == nil {
+	data, err := mc.buf.takeBuffer(pktLen + 4)
+	if err != nil {
 		// cannot take the buffer. Something must be wrong with the connection
-		errLog.Print(ErrBusyBuffer)
+		errLog.Print(err)
 		return errBadConnNoWrite
 	}
 
@@ -427,10 +461,10 @@ func (mc *mysqlConn) writeCommandPacketUint32(command byte, arg uint32) error {
 	// Reset Packet Sequence
 	mc.sequence = 0
 
-	data := mc.buf.takeSmallBuffer(4 + 1 + 4)
-	if data == nil {
+	data, err := mc.buf.takeSmallBuffer(4 + 1 + 4)
+	if err != nil {
 		// cannot take the buffer. Something must be wrong with the connection
-		errLog.Print(ErrBusyBuffer)
+		errLog.Print(err)
 		return errBadConnNoWrite
 	}
 
@@ -883,7 +917,7 @@ func (stmt *mysqlStmt) writeExecutePacket(args []driver.Value) error {
 	const minPktLen = 4 + 1 + 4 + 1 + 4
 	mc := stmt.mc
 
-	// Determine threshould dynamically to avoid packet size shortage.
+	// Determine threshold dynamically to avoid packet size shortage.
 	longDataSize := mc.maxAllowedPacket / (stmt.paramCount + 1)
 	if longDataSize < 64 {
 		longDataSize = 64
@@ -893,15 +927,17 @@ func (stmt *mysqlStmt) writeExecutePacket(args []driver.Value) error {
 	mc.sequence = 0
 
 	var data []byte
+	var err error
 
 	if len(args) == 0 {
-		data = mc.buf.takeBuffer(minPktLen)
+		data, err = mc.buf.takeBuffer(minPktLen)
 	} else {
-		data = mc.buf.takeCompleteBuffer()
+		data, err = mc.buf.takeCompleteBuffer()
+		// In this case the len(data) == cap(data) which is used to optimise the flow below.
 	}
-	if data == nil {
+	if err != nil {
 		// cannot take the buffer. Something must be wrong with the connection
-		errLog.Print(ErrBusyBuffer)
+		errLog.Print(err)
 		return errBadConnNoWrite
 	}
 
@@ -927,7 +963,7 @@ func (stmt *mysqlStmt) writeExecutePacket(args []driver.Value) error {
 		pos := minPktLen
 
 		var nullMask []byte
-		if maskLen, typesLen := (len(args)+7)/8, 1+2*len(args); pos+maskLen+typesLen >= len(data) {
+		if maskLen, typesLen := (len(args)+7)/8, 1+2*len(args); pos+maskLen+typesLen >= cap(data) {
 			// buffer has to be extended but we don't know by how much so
 			// we depend on append after all data with known sizes fit.
 			// We stop at that because we deal with a lot of columns here
@@ -936,10 +972,11 @@ func (stmt *mysqlStmt) writeExecutePacket(args []driver.Value) error {
 			copy(tmp[:pos], data[:pos])
 			data = tmp
 			nullMask = data[pos : pos+maskLen]
+			// No need to clean nullMask as make ensures that.
 			pos += maskLen
 		} else {
 			nullMask = data[pos : pos+maskLen]
-			for i := 0; i < maskLen; i++ {
+			for i := range nullMask {
 				nullMask[i] = 0
 			}
 			pos += maskLen
@@ -984,6 +1021,22 @@ func (stmt *mysqlStmt) writeExecutePacket(args []driver.Value) error {
 					)
 				}
 
+			case uint64:
+				paramTypes[i+i] = byte(fieldTypeLongLong)
+				paramTypes[i+i+1] = 0x80 // type is unsigned
+
+				if cap(paramValues)-len(paramValues)-8 >= 0 {
+					paramValues = paramValues[:len(paramValues)+8]
+					binary.LittleEndian.PutUint64(
+						paramValues[len(paramValues)-8:],
+						uint64(v),
+					)
+				} else {
+					paramValues = append(paramValues,
+						uint64ToBytes(uint64(v))...,
+					)
+				}
+
 			case float64:
 				paramTypes[i+i] = byte(fieldTypeDouble)
 				paramTypes[i+i+1] = 0x00
@@ -1076,7 +1129,10 @@ func (stmt *mysqlStmt) writeExecutePacket(args []driver.Value) error {
 		// In that case we must build the data packet with the new values buffer
 		if valuesCap != cap(paramValues) {
 			data = append(data[:pos], paramValues...)
-			mc.buf.buf = data
+			if err = mc.buf.store(data); err != nil {
+				errLog.Print(err)
+				return errBadConnNoWrite
+			}
 		}
 
 		pos += len(paramValues)
diff --git a/vendor/github.com/go-sql-driver/mysql/rows.go b/vendor/github.com/go-sql-driver/mysql/rows.go
index d3b1e28221..888bdb5f0a 100644
--- a/vendor/github.com/go-sql-driver/mysql/rows.go
+++ b/vendor/github.com/go-sql-driver/mysql/rows.go
@@ -111,6 +111,13 @@ func (rows *mysqlRows) Close() (err error) {
 		return err
 	}
 
+	// flip the buffer for this connection if we need to drain it.
+	// note that for a successful query (i.e. one where rows.next()
+	// has been called until it returns false), `rows.mc` will be nil
+	// by the time the user calls `(*Rows).Close`, so we won't reach this
+	// see: https://github.com/golang/go/commit/651ddbdb5056ded455f47f9c494c67b389622a47
+	mc.buf.flip()
+
 	// Remove unread packets from stream
 	if !rows.rs.done {
 		err = mc.readUntilEOF()
diff --git a/vendor/github.com/go-sql-driver/mysql/statement.go b/vendor/github.com/go-sql-driver/mysql/statement.go
index ce7fe4cd04..f7e370939a 100644
--- a/vendor/github.com/go-sql-driver/mysql/statement.go
+++ b/vendor/github.com/go-sql-driver/mysql/statement.go
@@ -13,7 +13,6 @@ import (
 	"fmt"
 	"io"
 	"reflect"
-	"strconv"
 )
 
 type mysqlStmt struct {
@@ -164,14 +163,8 @@ func (c converter) ConvertValue(v interface{}) (driver.Value, error) {
 		}
 	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
 		return rv.Int(), nil
-	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32:
-		return int64(rv.Uint()), nil
-	case reflect.Uint64:
-		u64 := rv.Uint()
-		if u64 >= 1<<63 {
-			return strconv.FormatUint(u64, 10), nil
-		}
-		return int64(u64), nil
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		return rv.Uint(), nil
 	case reflect.Float32, reflect.Float64:
 		return rv.Float(), nil
 	case reflect.Bool:
diff --git a/vendor/github.com/go-sql-driver/mysql/utils.go b/vendor/github.com/go-sql-driver/mysql/utils.go
index ca5d47d825..9552e80b5a 100644
--- a/vendor/github.com/go-sql-driver/mysql/utils.go
+++ b/vendor/github.com/go-sql-driver/mysql/utils.go
@@ -10,8 +10,10 @@ package mysql
 
 import (
 	"crypto/tls"
+	"database/sql"
 	"database/sql/driver"
 	"encoding/binary"
+	"errors"
 	"fmt"
 	"io"
 	"strconv"
@@ -54,7 +56,7 @@ var (
 //  db, err := sql.Open("mysql", "user@tcp(localhost:3306)/test?tls=custom")
 //
 func RegisterTLSConfig(key string, config *tls.Config) error {
-	if _, isBool := readBool(key); isBool || strings.ToLower(key) == "skip-verify" {
+	if _, isBool := readBool(key); isBool || strings.ToLower(key) == "skip-verify" || strings.ToLower(key) == "preferred" {
 		return fmt.Errorf("key '%s' is reserved", key)
 	}
 
@@ -80,7 +82,7 @@ func DeregisterTLSConfig(key string) {
 func getTLSConfigClone(key string) (config *tls.Config) {
 	tlsConfigLock.RLock()
 	if v, ok := tlsConfigRegistry[key]; ok {
-		config = cloneTLSConfig(v)
+		config = v.Clone()
 	}
 	tlsConfigLock.RUnlock()
 	return
@@ -104,60 +106,6 @@ func readBool(input string) (value bool, valid bool) {
 *                           Time related utils                                *
 ******************************************************************************/
 
-// NullTime represents a time.Time that may be NULL.
-// NullTime implements the Scanner interface so
-// it can be used as a scan destination:
-//
-//  var nt NullTime
-//  err := db.QueryRow("SELECT time FROM foo WHERE id=?", id).Scan(&nt)
-//  ...
-//  if nt.Valid {
-//     // use nt.Time
-//  } else {
-//     // NULL value
-//  }
-//
-// This NullTime implementation is not driver-specific
-type NullTime struct {
-	Time  time.Time
-	Valid bool // Valid is true if Time is not NULL
-}
-
-// Scan implements the Scanner interface.
-// The value type must be time.Time or string / []byte (formatted time-string),
-// otherwise Scan fails.
-func (nt *NullTime) Scan(value interface{}) (err error) {
-	if value == nil {
-		nt.Time, nt.Valid = time.Time{}, false
-		return
-	}
-
-	switch v := value.(type) {
-	case time.Time:
-		nt.Time, nt.Valid = v, true
-		return
-	case []byte:
-		nt.Time, err = parseDateTime(string(v), time.UTC)
-		nt.Valid = (err == nil)
-		return
-	case string:
-		nt.Time, err = parseDateTime(v, time.UTC)
-		nt.Valid = (err == nil)
-		return
-	}
-
-	nt.Valid = false
-	return fmt.Errorf("Can't convert %T to time.Time", value)
-}
-
-// Value implements the driver Valuer interface.
-func (nt NullTime) Value() (driver.Value, error) {
-	if !nt.Valid {
-		return nil, nil
-	}
-	return nt.Time, nil
-}
-
 func parseDateTime(str string, loc *time.Location) (t time.Time, err error) {
 	base := "0000-00-00 00:00:00.0000000"
 	switch len(str) {
@@ -682,7 +630,7 @@ type atomicBool struct {
 	value   uint32
 }
 
-// IsSet returns wether the current boolean value is true
+// IsSet returns whether the current boolean value is true
 func (ab *atomicBool) IsSet() bool {
 	return atomic.LoadUint32(&ab.value) > 0
 }
@@ -696,7 +644,7 @@ func (ab *atomicBool) Set(value bool) {
 	}
 }
 
-// TrySet sets the value of the bool and returns wether the value changed
+// TrySet sets the value of the bool and returns whether the value changed
 func (ab *atomicBool) TrySet(value bool) bool {
 	if value {
 		return atomic.SwapUint32(&ab.value, 1) == 0
@@ -724,3 +672,30 @@ func (ae *atomicError) Value() error {
 	}
 	return nil
 }
+
+func namedValueToValue(named []driver.NamedValue) ([]driver.Value, error) {
+	dargs := make([]driver.Value, len(named))
+	for n, param := range named {
+		if len(param.Name) > 0 {
+			// TODO: support the use of Named Parameters #561
+			return nil, errors.New("mysql: driver does not support the use of Named Parameters")
+		}
+		dargs[n] = param.Value
+	}
+	return dargs, nil
+}
+
+func mapIsolationLevel(level driver.IsolationLevel) (string, error) {
+	switch sql.IsolationLevel(level) {
+	case sql.LevelRepeatableRead:
+		return "REPEATABLE READ", nil
+	case sql.LevelReadCommitted:
+		return "READ COMMITTED", nil
+	case sql.LevelReadUncommitted:
+		return "READ UNCOMMITTED", nil
+	case sql.LevelSerializable:
+		return "SERIALIZABLE", nil
+	default:
+		return "", fmt.Errorf("mysql: unsupported isolation level: %v", level)
+	}
+}
diff --git a/vendor/github.com/go-sql-driver/mysql/utils_go17.go b/vendor/github.com/go-sql-driver/mysql/utils_go17.go
deleted file mode 100644
index f595634567..0000000000
--- a/vendor/github.com/go-sql-driver/mysql/utils_go17.go
+++ /dev/null
@@ -1,40 +0,0 @@
-// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
-//
-// Copyright 2017 The Go-MySQL-Driver Authors. All rights reserved.
-//
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this file,
-// You can obtain one at http://mozilla.org/MPL/2.0/.
-
-// +build go1.7
-// +build !go1.8
-
-package mysql
-
-import "crypto/tls"
-
-func cloneTLSConfig(c *tls.Config) *tls.Config {
-	return &tls.Config{
-		Rand:                        c.Rand,
-		Time:                        c.Time,
-		Certificates:                c.Certificates,
-		NameToCertificate:           c.NameToCertificate,
-		GetCertificate:              c.GetCertificate,
-		RootCAs:                     c.RootCAs,
-		NextProtos:                  c.NextProtos,
-		ServerName:                  c.ServerName,
-		ClientAuth:                  c.ClientAuth,
-		ClientCAs:                   c.ClientCAs,
-		InsecureSkipVerify:          c.InsecureSkipVerify,
-		CipherSuites:                c.CipherSuites,
-		PreferServerCipherSuites:    c.PreferServerCipherSuites,
-		SessionTicketsDisabled:      c.SessionTicketsDisabled,
-		SessionTicketKey:            c.SessionTicketKey,
-		ClientSessionCache:          c.ClientSessionCache,
-		MinVersion:                  c.MinVersion,
-		MaxVersion:                  c.MaxVersion,
-		CurvePreferences:            c.CurvePreferences,
-		DynamicRecordSizingDisabled: c.DynamicRecordSizingDisabled,
-		Renegotiation:               c.Renegotiation,
-	}
-}
diff --git a/vendor/github.com/go-sql-driver/mysql/utils_go18.go b/vendor/github.com/go-sql-driver/mysql/utils_go18.go
deleted file mode 100644
index c35c2a6aab..0000000000
--- a/vendor/github.com/go-sql-driver/mysql/utils_go18.go
+++ /dev/null
@@ -1,50 +0,0 @@
-// Go MySQL Driver - A MySQL-Driver for Go's database/sql package
-//
-// Copyright 2017 The Go-MySQL-Driver Authors. All rights reserved.
-//
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this file,
-// You can obtain one at http://mozilla.org/MPL/2.0/.
-
-// +build go1.8
-
-package mysql
-
-import (
-	"crypto/tls"
-	"database/sql"
-	"database/sql/driver"
-	"errors"
-	"fmt"
-)
-
-func cloneTLSConfig(c *tls.Config) *tls.Config {
-	return c.Clone()
-}
-
-func namedValueToValue(named []driver.NamedValue) ([]driver.Value, error) {
-	dargs := make([]driver.Value, len(named))
-	for n, param := range named {
-		if len(param.Name) > 0 {
-			// TODO: support the use of Named Parameters #561
-			return nil, errors.New("mysql: driver does not support the use of Named Parameters")
-		}
-		dargs[n] = param.Value
-	}
-	return dargs, nil
-}
-
-func mapIsolationLevel(level driver.IsolationLevel) (string, error) {
-	switch sql.IsolationLevel(level) {
-	case sql.LevelRepeatableRead:
-		return "REPEATABLE READ", nil
-	case sql.LevelReadCommitted:
-		return "READ COMMITTED", nil
-	case sql.LevelReadUncommitted:
-		return "READ UNCOMMITTED", nil
-	case sql.LevelSerializable:
-		return "SERIALIZABLE", nil
-	default:
-		return "", fmt.Errorf("mysql: unsupported isolation level: %v", level)
-	}
-}
diff --git a/vendor/google.golang.org/appengine/cloudsql/cloudsql.go b/vendor/google.golang.org/appengine/cloudsql/cloudsql.go
deleted file mode 100644
index 7b27e6b12d..0000000000
--- a/vendor/google.golang.org/appengine/cloudsql/cloudsql.go
+++ /dev/null
@@ -1,62 +0,0 @@
-// Copyright 2013 Google Inc. All rights reserved.
-// Use of this source code is governed by the Apache 2.0
-// license that can be found in the LICENSE file.
-
-/*
-Package cloudsql exposes access to Google Cloud SQL databases.
-
-This package does not work in App Engine "flexible environment".
-
-This package is intended for MySQL drivers to make App Engine-specific
-connections. Applications should use this package through database/sql:
-Select a pure Go MySQL driver that supports this package, and use sql.Open
-with protocol "cloudsql" and an address of the Cloud SQL instance.
-
-A Go MySQL driver that has been tested to work well with Cloud SQL
-is the go-sql-driver:
-	import "database/sql"
-	import _ "github.com/go-sql-driver/mysql"
-
-	db, err := sql.Open("mysql", "user@cloudsql(project-id:instance-name)/dbname")
-
-
-Another driver that works well with Cloud SQL is the mymysql driver:
-	import "database/sql"
-	import _ "github.com/ziutek/mymysql/godrv"
-
-	db, err := sql.Open("mymysql", "cloudsql:instance-name*dbname/user/password")
-
-
-Using either of these drivers, you can perform a standard SQL query.
-This example assumes there is a table named 'users' with
-columns 'first_name' and 'last_name':
-
-	rows, err := db.Query("SELECT first_name, last_name FROM users")
-	if err != nil {
-		log.Errorf(ctx, "db.Query: %v", err)
-	}
-	defer rows.Close()
-
-	for rows.Next() {
-		var firstName string
-		var lastName string
-		if err := rows.Scan(&firstName, &lastName); err != nil {
-			log.Errorf(ctx, "rows.Scan: %v", err)
-			continue
-		}
-		log.Infof(ctx, "First: %v - Last: %v", firstName, lastName)
-	}
-	if err := rows.Err(); err != nil {
-		log.Errorf(ctx, "Row error: %v", err)
-	}
-*/
-package cloudsql
-
-import (
-	"net"
-)
-
-// Dial connects to the named Cloud SQL instance.
-func Dial(instance string) (net.Conn, error) {
-	return connect(instance)
-}
diff --git a/vendor/google.golang.org/appengine/cloudsql/cloudsql_classic.go b/vendor/google.golang.org/appengine/cloudsql/cloudsql_classic.go
deleted file mode 100644
index af62dba146..0000000000
--- a/vendor/google.golang.org/appengine/cloudsql/cloudsql_classic.go
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright 2013 Google Inc. All rights reserved.
-// Use of this source code is governed by the Apache 2.0
-// license that can be found in the LICENSE file.
-
-// +build appengine
-
-package cloudsql
-
-import (
-	"net"
-
-	"appengine/cloudsql"
-)
-
-func connect(instance string) (net.Conn, error) {
-	return cloudsql.Dial(instance)
-}
diff --git a/vendor/google.golang.org/appengine/cloudsql/cloudsql_vm.go b/vendor/google.golang.org/appengine/cloudsql/cloudsql_vm.go
deleted file mode 100644
index 90fa7b31e0..0000000000
--- a/vendor/google.golang.org/appengine/cloudsql/cloudsql_vm.go
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2013 Google Inc. All rights reserved.
-// Use of this source code is governed by the Apache 2.0
-// license that can be found in the LICENSE file.
-
-// +build !appengine
-
-package cloudsql
-
-import (
-	"errors"
-	"net"
-)
-
-func connect(instance string) (net.Conn, error) {
-	return nil, errors.New(`cloudsql: not supported in App Engine "flexible environment"`)
-}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index e035128c6f..0423fa60c8 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -52,7 +52,7 @@ gitea.com/macaron/toolbox
 # github.com/BurntSushi/toml v0.3.1
 ## explicit
 github.com/BurntSushi/toml
-# github.com/PuerkitoBio/goquery v1.5.0
+# github.com/PuerkitoBio/goquery v1.5.1
 ## explicit
 github.com/PuerkitoBio/goquery
 # github.com/PuerkitoBio/purell v1.1.1
@@ -96,7 +96,7 @@ github.com/alecthomas/chroma/lexers/y
 github.com/alecthomas/chroma/styles
 # github.com/andybalholm/brotli v0.0.0-20190621154722-5f990b63d2d6
 github.com/andybalholm/brotli
-# github.com/andybalholm/cascadia v1.0.0
+# github.com/andybalholm/cascadia v1.1.0
 github.com/andybalholm/cascadia
 # github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239
 github.com/anmitsu/go-shlex
@@ -356,7 +356,7 @@ github.com/go-redis/redis/internal/hashtag
 github.com/go-redis/redis/internal/pool
 github.com/go-redis/redis/internal/proto
 github.com/go-redis/redis/internal/util
-# github.com/go-sql-driver/mysql v1.4.1
+# github.com/go-sql-driver/mysql v1.5.0
 ## explicit
 github.com/go-sql-driver/mysql
 # github.com/go-stack/stack v1.8.0
@@ -850,7 +850,6 @@ golang.org/x/xerrors/internal
 # google.golang.org/appengine v1.6.5
 ## explicit
 google.golang.org/appengine
-google.golang.org/appengine/cloudsql
 google.golang.org/appengine/internal
 google.golang.org/appengine/internal/app_identity
 google.golang.org/appengine/internal/base
@@ -917,7 +916,7 @@ strk.kbt.io/projects/go/libravatar
 # xorm.io/builder v0.3.7
 ## explicit
 xorm.io/builder
-# xorm.io/xorm v1.0.2
+# xorm.io/xorm v1.0.3
 ## explicit
 xorm.io/xorm
 xorm.io/xorm/caches
diff --git a/vendor/xorm.io/xorm/CHANGELOG.md b/vendor/xorm.io/xorm/CHANGELOG.md
index 8cd081e04a..fa0259bc73 100644
--- a/vendor/xorm.io/xorm/CHANGELOG.md
+++ b/vendor/xorm.io/xorm/CHANGELOG.md
@@ -3,6 +3,28 @@
 This changelog goes through all the changes that have been made in each release
 without substantial changes to our git log.
 
+## [1.0.3](https://gitea.com/xorm/xorm/pulls?q=&type=all&state=closed&milestone=1281) - 2020-07-10
+
+* BUGFIXES
+  * Fix dump of sqlite (#1639)
+* ENHANCEMENTS
+  * Fix index name parsing in SQLite dialect (#1737)
+  * add hooks for Commit and Rollback (#1733)
+
+## [1.0.2](https://gitea.com/xorm/xorm/pulls?q=&type=all&state=closed&milestone=1261) - 2020-06-16
+
+* FEATURES
+  * Add Hook (#1644)
+* BUGFIXES
+  * Fix bug when ID used but no reference table given (#1709)
+  * Fix find and count bug (#1651)
+* ENHANCEMENTS
+  * chore: improve snakeCasedName performance (#1688)
+  * Fix find with another struct (#1666)
+  * fix GetColumns missing ordinal position (#1660)
+* MISC
+  * chore: improve titleCasedName performance (#1691)
+
 ## [1.0.1](https://gitea.com/xorm/xorm/pulls?q=&type=all&state=closed&milestone=1253) - 2020-03-25
 
 * BUGFIXES
diff --git a/vendor/xorm.io/xorm/README.md b/vendor/xorm.io/xorm/README.md
index a15be488b5..ed866224f9 100644
--- a/vendor/xorm.io/xorm/README.md
+++ b/vendor/xorm.io/xorm/README.md
@@ -4,9 +4,7 @@
 
 Xorm is a simple and powerful ORM for Go.
 
-[![Build Status](https://drone.gitea.com/api/badges/xorm/xorm/status.svg)](https://drone.gitea.com/xorm/xorm) [![](http://gocover.io/_badge/xorm.io/xorm)](https://gocover.io/xorm.io/xorm)
-[![](https://goreportcard.com/badge/xorm.io/xorm)](https://goreportcard.com/report/xorm.io/xorm)
-[![Join the chat at https://img.shields.io/discord/323460943201959939.svg](https://img.shields.io/discord/323460943201959939.svg)](https://discord.gg/HuR2CF3)
+[![Build Status](https://drone.gitea.com/api/badges/xorm/xorm/status.svg)](https://drone.gitea.com/xorm/xorm) [![](http://gocover.io/_badge/xorm.io/xorm)](https://gocover.io/xorm.io/xorm) [![](https://goreportcard.com/badge/xorm.io/xorm)](https://goreportcard.com/report/xorm.io/xorm) [![Join the chat at https://img.shields.io/discord/323460943201959939.svg](https://img.shields.io/discord/323460943201959939.svg)](https://discord.gg/HuR2CF3)
 
 ## Notice
 
diff --git a/vendor/xorm.io/xorm/README_CN.md b/vendor/xorm.io/xorm/README_CN.md
index f6f8831018..80245dd33f 100644
--- a/vendor/xorm.io/xorm/README_CN.md
+++ b/vendor/xorm.io/xorm/README_CN.md
@@ -4,9 +4,7 @@
 
 xorm 是一个简单而强大的Go语言ORM库. 通过它可以使数据库操作非常简便。
 
-[![Build Status](https://drone.gitea.com/api/badges/xorm/xorm/status.svg)](https://drone.gitea.com/xorm/xorm) [![](http://gocover.io/_badge/xorm.io/xorm)](https://gocover.io/xorm.io/xorm)
-[![](https://goreportcard.com/badge/xorm.io/xorm)](https://goreportcard.com/report/xorm.io/xorm)
-[![Join the chat at https://img.shields.io/discord/323460943201959939.svg](https://img.shields.io/discord/323460943201959939.svg)](https://discord.gg/HuR2CF3)
+[![Build Status](https://drone.gitea.com/api/badges/xorm/xorm/status.svg)](https://drone.gitea.com/xorm/xorm) [![](http://gocover.io/_badge/xorm.io/xorm)](https://gocover.io/xorm.io/xorm) [![](https://goreportcard.com/badge/xorm.io/xorm)](https://goreportcard.com/report/xorm.io/xorm) [![Join the chat at https://img.shields.io/discord/323460943201959939.svg](https://img.shields.io/discord/323460943201959939.svg)](https://discord.gg/HuR2CF3)
 
 ## Notice
 
diff --git a/vendor/xorm.io/xorm/core/tx.go b/vendor/xorm.io/xorm/core/tx.go
index 9b2988af2b..a85a687457 100644
--- a/vendor/xorm.io/xorm/core/tx.go
+++ b/vendor/xorm.io/xorm/core/tx.go
@@ -18,7 +18,8 @@ var (
 // Tx represents a transaction
 type Tx struct {
 	*sql.Tx
-	db *DB
+	db  *DB
+	ctx context.Context
 }
 
 func (db *DB) BeginTx(ctx context.Context, opts *sql.TxOptions) (*Tx, error) {
@@ -32,13 +33,41 @@ func (db *DB) BeginTx(ctx context.Context, opts *sql.TxOptions) (*Tx, error) {
 	if err := db.afterProcess(hookCtx); err != nil {
 		return nil, err
 	}
-	return &Tx{tx, db}, nil
+	return &Tx{tx, db, ctx}, nil
 }
 
 func (db *DB) Begin() (*Tx, error) {
 	return db.BeginTx(context.Background(), nil)
 }
 
+func (tx *Tx) Commit() error {
+	hookCtx := contexts.NewContextHook(tx.ctx, "COMMIT", nil)
+	ctx, err := tx.db.beforeProcess(hookCtx)
+	if err != nil {
+		return err
+	}
+	err = tx.Tx.Commit()
+	hookCtx.End(ctx, nil, err)
+	if err := tx.db.afterProcess(hookCtx); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (tx *Tx) Rollback() error {
+	hookCtx := contexts.NewContextHook(tx.ctx, "ROLLBACK", nil)
+	ctx, err := tx.db.beforeProcess(hookCtx)
+	if err != nil {
+		return err
+	}
+	err = tx.Tx.Rollback()
+	hookCtx.End(ctx, nil, err)
+	if err := tx.db.afterProcess(hookCtx); err != nil {
+		return err
+	}
+	return nil
+}
+
 func (tx *Tx) PrepareContext(ctx context.Context, query string) (*Stmt, error) {
 	names := make(map[string]int)
 	var i int
diff --git a/vendor/xorm.io/xorm/dialects/mssql.go b/vendor/xorm.io/xorm/dialects/mssql.go
index 8ef924b820..f766950ca2 100644
--- a/vendor/xorm.io/xorm/dialects/mssql.go
+++ b/vendor/xorm.io/xorm/dialects/mssql.go
@@ -231,6 +231,7 @@ func (db *mssql) SQLType(c *schemas.Column) string {
 		} else if strings.EqualFold(c.Default, "false") {
 			c.Default = "0"
 		}
+		return res
 	case schemas.Serial:
 		c.IsAutoIncrement = true
 		c.IsPrimaryKey = true
@@ -270,8 +271,8 @@ func (db *mssql) SQLType(c *schemas.Column) string {
 		res = t
 	}
 
-	if res == schemas.Int {
-		return schemas.Int
+	if res == schemas.Int || res == schemas.Bit || res == schemas.DateTime {
+		return res
 	}
 
 	hasLen1 := (c.Length > 0)
diff --git a/vendor/xorm.io/xorm/dialects/sqlite3.go b/vendor/xorm.io/xorm/dialects/sqlite3.go
index 0e91093479..73f98beb9d 100644
--- a/vendor/xorm.io/xorm/dialects/sqlite3.go
+++ b/vendor/xorm.io/xorm/dialects/sqlite3.go
@@ -483,7 +483,7 @@ func (db *sqlite3) GetIndexes(queryer core.Queryer, ctx context.Context, tableNa
 			continue
 		}
 
-		indexName := strings.Trim(sql[nNStart+6:nNEnd], "` []")
+		indexName := strings.Trim(sql[nNStart+6:nNEnd], "` []'\"")
 		var isRegular bool
 		if strings.HasPrefix(indexName, "IDX_"+tableName) || strings.HasPrefix(indexName, "UQE_"+tableName) {
 			index.Name = indexName[5+len(tableName):]
diff --git a/vendor/xorm.io/xorm/engine.go b/vendor/xorm.io/xorm/engine.go
index b5cb65581a..4159a7b24b 100644
--- a/vendor/xorm.io/xorm/engine.go
+++ b/vendor/xorm.io/xorm/engine.go
@@ -143,10 +143,10 @@ func (engine *Engine) Logger() log.ContextLogger {
 func (engine *Engine) SetLogger(logger interface{}) {
 	var realLogger log.ContextLogger
 	switch t := logger.(type) {
-	case log.Logger:
-		realLogger = log.NewLoggerAdapter(t)
 	case log.ContextLogger:
 		realLogger = t
+	case log.Logger:
+		realLogger = log.NewLoggerAdapter(t)
 	}
 	engine.logger = realLogger
 	engine.DB().Logger = realLogger
@@ -412,6 +412,82 @@ func (engine *Engine) DumpTables(tables []*schemas.Table, w io.Writer, tp ...sch
 	return engine.dumpTables(tables, w, tp...)
 }
 
+func formatColumnValue(dstDialect dialects.Dialect, d interface{}, col *schemas.Column) string {
+	if d == nil {
+		return "NULL"
+	}
+
+	if dq, ok := d.(bool); ok && (dstDialect.URI().DBType == schemas.SQLITE ||
+		dstDialect.URI().DBType == schemas.MSSQL) {
+		if dq {
+			return "1"
+		}
+		return "0"
+	}
+
+	if col.SQLType.IsText() {
+		var v = fmt.Sprintf("%s", d)
+		return "'" + strings.Replace(v, "'", "''", -1) + "'"
+	} else if col.SQLType.IsTime() {
+		var v = fmt.Sprintf("%s", d)
+		if strings.HasSuffix(v, " +0000 UTC") {
+			return fmt.Sprintf("'%s'", v[0:len(v)-len(" +0000 UTC")])
+		} else if strings.HasSuffix(v, " +0000 +0000") {
+			return fmt.Sprintf("'%s'", v[0:len(v)-len(" +0000 +0000")])
+		}
+		return "'" + strings.Replace(v, "'", "''", -1) + "'"
+	} else if col.SQLType.IsBlob() {
+		if reflect.TypeOf(d).Kind() == reflect.Slice {
+			return fmt.Sprintf("%s", dstDialect.FormatBytes(d.([]byte)))
+		} else if reflect.TypeOf(d).Kind() == reflect.String {
+			return fmt.Sprintf("'%s'", d.(string))
+		}
+	} else if col.SQLType.IsNumeric() {
+		switch reflect.TypeOf(d).Kind() {
+		case reflect.Slice:
+			if col.SQLType.Name == schemas.Bool {
+				return fmt.Sprintf("%v", strconv.FormatBool(d.([]byte)[0] != byte('0')))
+			}
+			return fmt.Sprintf("%s", string(d.([]byte)))
+		case reflect.Int16, reflect.Int8, reflect.Int32, reflect.Int64, reflect.Int:
+			if col.SQLType.Name == schemas.Bool {
+				v := reflect.ValueOf(d).Int() > 0
+				if dstDialect.URI().DBType == schemas.SQLITE {
+					if v {
+						return "1"
+					}
+					return "0"
+				}
+				return fmt.Sprintf("%v", strconv.FormatBool(v))
+			}
+			return fmt.Sprintf("%v", d)
+		case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+			if col.SQLType.Name == schemas.Bool {
+				v := reflect.ValueOf(d).Uint() > 0
+				if dstDialect.URI().DBType == schemas.SQLITE {
+					if v {
+						return "1"
+					}
+					return "0"
+				}
+				return fmt.Sprintf("%v", strconv.FormatBool(v))
+			}
+			return fmt.Sprintf("%v", d)
+		default:
+			return fmt.Sprintf("%v", d)
+		}
+	}
+
+	s := fmt.Sprintf("%v", d)
+	if strings.Contains(s, ":") || strings.Contains(s, "-") {
+		if strings.HasSuffix(s, " +0000 UTC") {
+			return fmt.Sprintf("'%s'", s[0:len(s)-len(" +0000 UTC")])
+		}
+		return fmt.Sprintf("'%s'", s)
+	}
+	return s
+}
+
 // dumpTables dump database all table structs and data to w with specify db type
 func (engine *Engine) dumpTables(tables []*schemas.Table, w io.Writer, tp ...schemas.DBType) error {
 	var dstDialect dialects.Dialect
@@ -424,7 +500,10 @@ func (engine *Engine) dumpTables(tables []*schemas.Table, w io.Writer, tp ...sch
 		}
 
 		uri := engine.dialect.URI()
-		destURI := *uri
+		destURI := dialects.URI{
+			DBType: tp[0],
+			DBName: uri.DBName,
+		}
 		dstDialect.Init(&destURI)
 	}
 
@@ -495,59 +574,9 @@ func (engine *Engine) dumpTables(tables []*schemas.Table, w io.Writer, tp ...sch
 				if col == nil {
 					return errors.New("unknow column error")
 				}
-
-				if d == nil {
-					temp += ", NULL"
-				} else if col.SQLType.IsText() || col.SQLType.IsTime() {
-					var v = fmt.Sprintf("%s", d)
-					if strings.HasSuffix(v, " +0000 UTC") {
-						temp += fmt.Sprintf(", '%s'", v[0:len(v)-len(" +0000 UTC")])
-					} else {
-						temp += ", '" + strings.Replace(v, "'", "''", -1) + "'"
-					}
-				} else if col.SQLType.IsBlob() {
-					if reflect.TypeOf(d).Kind() == reflect.Slice {
-						temp += fmt.Sprintf(", %s", dstDialect.FormatBytes(d.([]byte)))
-					} else if reflect.TypeOf(d).Kind() == reflect.String {
-						temp += fmt.Sprintf(", '%s'", d.(string))
-					}
-				} else if col.SQLType.IsNumeric() {
-					switch reflect.TypeOf(d).Kind() {
-					case reflect.Slice:
-						if col.SQLType.Name == schemas.Bool {
-							temp += fmt.Sprintf(", %v", strconv.FormatBool(d.([]byte)[0] != byte('0')))
-						} else {
-							temp += fmt.Sprintf(", %s", string(d.([]byte)))
-						}
-					case reflect.Int16, reflect.Int8, reflect.Int32, reflect.Int64, reflect.Int:
-						if col.SQLType.Name == schemas.Bool {
-							temp += fmt.Sprintf(", %v", strconv.FormatBool(reflect.ValueOf(d).Int() > 0))
-						} else {
-							temp += fmt.Sprintf(", %v", d)
-						}
-					case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
-						if col.SQLType.Name == schemas.Bool {
-							temp += fmt.Sprintf(", %v", strconv.FormatBool(reflect.ValueOf(d).Uint() > 0))
-						} else {
-							temp += fmt.Sprintf(", %v", d)
-						}
-					default:
-						temp += fmt.Sprintf(", %v", d)
-					}
-				} else {
-					s := fmt.Sprintf("%v", d)
-					if strings.Contains(s, ":") || strings.Contains(s, "-") {
-						if strings.HasSuffix(s, " +0000 UTC") {
-							temp += fmt.Sprintf(", '%s'", s[0:len(s)-len(" +0000 UTC")])
-						} else {
-							temp += fmt.Sprintf(", '%s'", s)
-						}
-					} else {
-						temp += fmt.Sprintf(", %s", s)
-					}
-				}
+				temp += "," + formatColumnValue(dstDialect, d, col)
 			}
-			_, err = io.WriteString(w, temp[2:]+");\n")
+			_, err = io.WriteString(w, temp[1:]+");\n")
 			if err != nil {
 				return err
 			}
@@ -1263,11 +1292,11 @@ func (engine *Engine) Transaction(f func(*Session) (interface{}, error)) (interf
 
 	result, err := f(session)
 	if err != nil {
-		return nil, err
+		return result, err
 	}
 
 	if err := session.Commit(); err != nil {
-		return nil, err
+		return result, err
 	}
 
 	return result, nil
diff --git a/vendor/xorm.io/xorm/go.mod b/vendor/xorm.io/xorm/go.mod
index ff42c0f7ed..e0d22a2455 100644
--- a/vendor/xorm.io/xorm/go.mod
+++ b/vendor/xorm.io/xorm/go.mod
@@ -3,14 +3,12 @@ module xorm.io/xorm
 go 1.11
 
 require (
-	github.com/denisenkom/go-mssqldb v0.0.0-20190707035753-2be1aa521ff4
-	github.com/go-sql-driver/mysql v1.4.1
-	github.com/kr/pretty v0.1.0 // indirect
-	github.com/lib/pq v1.0.0
-	github.com/mattn/go-sqlite3 v1.10.0
+	github.com/denisenkom/go-mssqldb v0.0.0-20200428022330-06a60b6afbbc
+	github.com/go-sql-driver/mysql v1.5.0
+	github.com/lib/pq v1.7.0
+	github.com/mattn/go-sqlite3 v1.14.0
 	github.com/stretchr/testify v1.4.0
 	github.com/syndtr/goleveldb v1.0.0
 	github.com/ziutek/mymysql v1.5.4
-	google.golang.org/appengine v1.6.0 // indirect
 	xorm.io/builder v0.3.7
 )
diff --git a/vendor/xorm.io/xorm/go.sum b/vendor/xorm.io/xorm/go.sum
index 84f9126e42..2da01eeb72 100644
--- a/vendor/xorm.io/xorm/go.sum
+++ b/vendor/xorm.io/xorm/go.sum
@@ -1,90 +1,33 @@
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@@ -93,60 +36,20 @@ github.com/syndtr/goleveldb v1.0.0 h1:fBdIW9lB4Iz0n9khmH8w27SJ3QEJ7+IgjPEwGSZiFd
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-golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6 h1:bjcUS9ztw9kFmmIxJInhon/0Is3p+EHBKNgquIzo1OI=
-golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20181122145206-62eef0e2fa9b/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a h1:1BGLXjeY4akVXGgbC9HugT3Jv3hCI0z56oJR5vAMgBU=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2 h1:z99zHgr7hKfrUcX/KsoJk5FJfjTceCKIp96+biqP4To=
-golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
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-golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
-golang.org/x/tools v0.0.0-20190312170243-e65039ee4138/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
-google.golang.org/api v0.3.1/go.mod h1:6wY9I6uQWHQ8EM57III9mq/AjF+i8G65rmVagqKMtkk=
-google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
-google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
-google.golang.org/appengine v1.6.0 h1:Tfd7cKwKbFRsI8RMAD3oqqw7JPFRrvFlOsfbgVkjOOw=
-google.golang.org/appengine v1.6.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
-google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
-google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
-google.golang.org/genproto v0.0.0-20190404172233-64821d5d2107/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
-google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
-google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
-gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
-gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
@@ -154,8 +57,5 @@ gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWD
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 xorm.io/builder v0.3.7 h1:2pETdKRK+2QG4mLX4oODHEhn5Z8j1m8sXa7jfu+/SZI=
 xorm.io/builder v0.3.7/go.mod h1:aUW0S9eb9VCaPohFCH3j7czOx1PMW3i1HrSzbLYGBSE=
diff --git a/vendor/xorm.io/xorm/session_update.go b/vendor/xorm.io/xorm/session_update.go
index 62116c473c..7df8c75253 100644
--- a/vendor/xorm.io/xorm/session_update.go
+++ b/vendor/xorm.io/xorm/session_update.go
@@ -206,7 +206,11 @@ func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int6
 			colNames = append(colNames, session.engine.Quote(table.Updated)+" = ?")
 			col := table.UpdatedColumn()
 			val, t := session.engine.nowTime(col)
-			args = append(args, val)
+			if session.engine.dialect.URI().DBType == schemas.ORACLE {
+				args = append(args, t)
+			} else {
+				args = append(args, val)
+			}
 
 			var colName = col.Name
 			if isStruct {