Fix error log when loading issues caused by a xorm bug (#7271)

* fix error log when loading issues caused by a xorm bug

* upgrade packages

* fix fmt

* fix Consistency

* fix tests

54 files changed, 5615 insertions, 0 deletions

diff --git a/vendor/xorm.io/builder/.drone.yml b/vendor/xorm.io/builder/.drone.yml
new file mode 100644
index 0000000000..ca40377721
--- /dev/null
+++ b/vendor/xorm.io/builder/.drone.yml
@@ -0,0 +1,37 @@
+workspace:
+  base: /go
+  path: src/github.com/go-xorm/builder
+
+clone:
+  git:
+    image: plugins/git:next
+    depth: 50
+    tags: true
+
+matrix:
+  GO_VERSION:
+    - 1.8
+    - 1.9
+    - 1.10
+    - 1.11
+
+pipeline:
+  test:
+    image: golang:${GO_VERSION}
+    commands:
+      - go get -u github.com/golang/lint/golint
+      - go get -u github.com/stretchr/testify/assert
+      - go get -u github.com/go-xorm/sqlfiddle
+      - golint ./...
+      - go test -v -race -coverprofile=coverage.txt -covermode=atomic
+    when:
+      event: [ push, tag, pull_request ]
+
+codecov:
+    image: robertstettner/drone-codecov
+    group: build
+    secrets: [ codecov_token ]
+    files:
+      - coverage.txt
+    when:
+      event: [ push, pull_request ]
\ No newline at end of file
diff --git a/vendor/xorm.io/builder/LICENSE b/vendor/xorm.io/builder/LICENSE
new file mode 100644
index 0000000000..614d5e2829
--- /dev/null
+++ b/vendor/xorm.io/builder/LICENSE
@@ -0,0 +1,27 @@
+Copyright (c) 2016 The Xorm Authors
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+* Neither the name of the {organization} nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/xorm.io/builder/README.md b/vendor/xorm.io/builder/README.md
new file mode 100644
index 0000000000..cf516d1fd5
--- /dev/null
+++ b/vendor/xorm.io/builder/README.md
@@ -0,0 +1,206 @@
+# SQL builder
+
+[![GitCI.cn](https://gitci.cn/api/badges/go-xorm/builder/status.svg)](https://gitci.cn/go-xorm/builder)  [![codecov](https://codecov.io/gh/go-xorm/builder/branch/master/graph/badge.svg)](https://codecov.io/gh/go-xorm/builder)
+[![](https://goreportcard.com/badge/github.com/go-xorm/builder)](https://goreportcard.com/report/github.com/go-xorm/builder)
+
+Package builder is a lightweight and fast SQL builder for Go and XORM.
+
+Make sure you have installed Go 1.8+ and then:
+
+    go get github.com/go-xorm/builder
+
+# Insert
+
+```Go
+sql, args, err := builder.Insert(Eq{"c": 1, "d": 2}).Into("table1").ToSQL()
+
+// INSERT INTO table1 SELECT * FROM table2
+sql, err := builder.Insert().Into("table1").Select().From("table2").ToBoundSQL()
+
+// INSERT INTO table1 (a, b) SELECT b, c FROM table2
+sql, err = builder.Insert("a, b").Into("table1").Select("b, c").From("table2").ToBoundSQL()
+```
+
+# Select
+
+```Go
+// Simple Query
+sql, args, err := Select("c, d").From("table1").Where(Eq{"a": 1}).ToSQL()
+// With join
+sql, args, err = Select("c, d").From("table1").LeftJoin("table2", Eq{"table1.id": 1}.And(Lt{"table2.id": 3})).
+		RightJoin("table3", "table2.id = table3.tid").Where(Eq{"a": 1}).ToSQL()
+// From sub query
+sql, args, err := Select("sub.id").From(Select("c").From("table1").Where(Eq{"a": 1}), "sub").Where(Eq{"b": 1}).ToSQL()
+// From union query
+sql, args, err = Select("sub.id").From(
+	Select("id").From("table1").Where(Eq{"a": 1}).Union("all", Select("id").From("table1").Where(Eq{"a": 2})),"sub").
+	Where(Eq{"b": 1}).ToSQL()
+// With order by
+sql, args, err = Select("a", "b", "c").From("table1").Where(Eq{"f1": "v1", "f2": "v2"}).
+		OrderBy("a ASC").ToSQL()
+// With limit.
+// Be careful! You should set up specific dialect for builder before performing a query with LIMIT
+sql, args, err = Dialect(MYSQL).Select("a", "b", "c").From("table1").OrderBy("a ASC").
+		Limit(5, 10).ToSQL()
+```
+
+# Update
+
+```Go
+sql, args, err := Update(Eq{"a": 2}).From("table1").Where(Eq{"a": 1}).ToSQL()
+```
+
+# Delete
+
+```Go
+sql, args, err := Delete(Eq{"a": 1}).From("table1").ToSQL()
+```
+
+# Union
+
+```Go
+sql, args, err := Select("*").From("a").Where(Eq{"status": "1"}).
+		Union("all", Select("*").From("a").Where(Eq{"status": "2"})).
+		Union("distinct", Select("*").From("a").Where(Eq{"status": "3"})).
+		Union("", Select("*").From("a").Where(Eq{"status": "4"})).
+		ToSQL()
+```
+
+# Conditions
+
+* `Eq` is a redefine of a map, you can give one or more conditions to `Eq`
+
+```Go
+import . "github.com/go-xorm/builder"
+
+sql, args, _ := ToSQL(Eq{"a":1})
+// a=? [1]
+sql, args, _ := ToSQL(Eq{"b":"c"}.And(Eq{"c": 0}))
+// b=? AND c=? ["c", 0]
+sql, args, _ := ToSQL(Eq{"b":"c", "c":0})
+// b=? AND c=? ["c", 0]
+sql, args, _ := ToSQL(Eq{"b":"c"}.Or(Eq{"b":"d"}))
+// b=? OR b=? ["c", "d"]
+sql, args, _ := ToSQL(Eq{"b": []string{"c", "d"}})
+// b IN (?,?) ["c", "d"]
+sql, args, _ := ToSQL(Eq{"b": 1, "c":[]int{2, 3}})
+// b=? AND c IN (?,?) [1, 2, 3]
+```
+
+* `Neq` is the same to `Eq`
+
+```Go
+import . "github.com/go-xorm/builder"
+
+sql, args, _ := ToSQL(Neq{"a":1})
+// a<>? [1]
+sql, args, _ := ToSQL(Neq{"b":"c"}.And(Neq{"c": 0}))
+// b<>? AND c<>? ["c", 0]
+sql, args, _ := ToSQL(Neq{"b":"c", "c":0})
+// b<>? AND c<>? ["c", 0]
+sql, args, _ := ToSQL(Neq{"b":"c"}.Or(Neq{"b":"d"}))
+// b<>? OR b<>? ["c", "d"]
+sql, args, _ := ToSQL(Neq{"b": []string{"c", "d"}})
+// b NOT IN (?,?) ["c", "d"]
+sql, args, _ := ToSQL(Neq{"b": 1, "c":[]int{2, 3}})
+// b<>? AND c NOT IN (?,?) [1, 2, 3]
+```
+
+* `Gt`, `Gte`, `Lt`, `Lte`
+
+```Go
+import . "github.com/go-xorm/builder"
+
+sql, args, _ := ToSQL(Gt{"a", 1}.And(Gte{"b", 2}))
+// a>? AND b>=? [1, 2]
+sql, args, _ := ToSQL(Lt{"a", 1}.Or(Lte{"b", 2}))
+// a<? OR b<=? [1, 2]
+```
+
+* `Like`
+
+```Go
+import . "github.com/go-xorm/builder"
+
+sql, args, _ := ToSQL(Like{"a", "c"})
+// a LIKE ? [%c%]
+```
+
+* `Expr` you can customerize your sql with `Expr`
+
+```Go
+import . "github.com/go-xorm/builder"
+
+sql, args, _ := ToSQL(Expr("a = ? ", 1))
+// a = ? [1]
+sql, args, _ := ToSQL(Eq{"a": Expr("select id from table where c = ?", 1)})
+// a=(select id from table where c = ?) [1]
+```
+
+* `In` and `NotIn`
+
+```Go
+import . "github.com/go-xorm/builder"
+
+sql, args, _ := ToSQL(In("a", 1, 2, 3))
+// a IN (?,?,?) [1,2,3]
+sql, args, _ := ToSQL(In("a", []int{1, 2, 3}))
+// a IN (?,?,?) [1,2,3]
+sql, args, _ := ToSQL(In("a", Expr("select id from b where c = ?", 1))))
+// a IN (select id from b where c = ?) [1]
+```
+
+* `IsNull` and `NotNull`
+
+```Go
+import . "github.com/go-xorm/builder"
+
+sql, args, _ := ToSQL(IsNull{"a"})
+// a IS NULL []
+sql, args, _ := ToSQL(NotNull{"b"})
+	// b IS NOT NULL []
+```
+
+* `And(conds ...Cond)`, And can connect one or more condtions via And
+
+```Go
+import . "github.com/go-xorm/builder"
+
+sql, args, _ := ToSQL(And(Eq{"a":1}, Like{"b", "c"}, Neq{"d", 2}))
+// a=? AND b LIKE ? AND d<>? [1, %c%, 2]
+```
+
+* `Or(conds ...Cond)`, Or can connect one or more conditions via Or
+
+```Go
+import . "github.com/go-xorm/builder"
+
+sql, args, _ := ToSQL(Or(Eq{"a":1}, Like{"b", "c"}, Neq{"d", 2}))
+// a=? OR b LIKE ? OR d<>? [1, %c%, 2]
+sql, args, _ := ToSQL(Or(Eq{"a":1}, And(Like{"b", "c"}, Neq{"d", 2})))
+// a=? OR (b LIKE ? AND d<>?) [1, %c%, 2]
+```
+
+* `Between`
+
+```Go
+import . "github.com/go-xorm/builder"
+
+sql, args, _ := ToSQL(Between{"a", 1, 2})
+// a BETWEEN 1 AND 2
+```
+
+* Define yourself conditions
+
+Since `Cond` is an interface.
+
+```Go
+type Cond interface {
+	WriteTo(Writer) error
+	And(...Cond) Cond
+	Or(...Cond) Cond
+	IsValid() bool
+}
+```
+
+You can define yourself conditions and compose with other `Cond`.
\ No newline at end of file
diff --git a/vendor/xorm.io/builder/builder.go b/vendor/xorm.io/builder/builder.go
new file mode 100644
index 0000000000..ffe86d4dcb
--- /dev/null
+++ b/vendor/xorm.io/builder/builder.go
@@ -0,0 +1,394 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import (
+	sql2 "database/sql"
+	"fmt"
+	"sort"
+)
+
+type optype byte
+
+const (
+	condType   optype = iota // only conditions
+	selectType               // select
+	insertType               // insert
+	updateType               // update
+	deleteType               // delete
+	unionType                // union
+)
+
+const (
+	POSTGRES = "postgres"
+	SQLITE   = "sqlite3"
+	MYSQL    = "mysql"
+	MSSQL    = "mssql"
+	ORACLE   = "oracle"
+)
+
+type join struct {
+	joinType  string
+	joinTable string
+	joinCond  Cond
+}
+
+type union struct {
+	unionType string
+	builder   *Builder
+}
+
+type limit struct {
+	limitN int
+	offset int
+}
+
+// Builder describes a SQL statement
+type Builder struct {
+	optype
+	dialect    string
+	isNested   bool
+	into       string
+	from       string
+	subQuery   *Builder
+	cond       Cond
+	selects    []string
+	joins      []join
+	unions     []union
+	limitation *limit
+	insertCols []string
+	insertVals []interface{}
+	updates    []Eq
+	orderBy    string
+	groupBy    string
+	having     string
+}
+
+// Dialect sets the db dialect of Builder.
+func Dialect(dialect string) *Builder {
+	builder := &Builder{cond: NewCond(), dialect: dialect}
+	return builder
+}
+
+// MySQL is shortcut of Dialect(MySQL)
+func MySQL() *Builder {
+	return Dialect(MYSQL)
+}
+
+// MsSQL is shortcut of Dialect(MsSQL)
+func MsSQL() *Builder {
+	return Dialect(MSSQL)
+}
+
+// Oracle is shortcut of Dialect(Oracle)
+func Oracle() *Builder {
+	return Dialect(ORACLE)
+}
+
+// Postgres is shortcut of Dialect(Postgres)
+func Postgres() *Builder {
+	return Dialect(POSTGRES)
+}
+
+// SQLite is shortcut of Dialect(SQLITE)
+func SQLite() *Builder {
+	return Dialect(SQLITE)
+}
+
+// Where sets where SQL
+func (b *Builder) Where(cond Cond) *Builder {
+	if b.cond.IsValid() {
+		b.cond = b.cond.And(cond)
+	} else {
+		b.cond = cond
+	}
+	return b
+}
+
+// From sets from subject(can be a table name in string or a builder pointer) and its alias
+func (b *Builder) From(subject interface{}, alias ...string) *Builder {
+	switch subject.(type) {
+	case *Builder:
+		b.subQuery = subject.(*Builder)
+
+		if len(alias) > 0 {
+			b.from = alias[0]
+		} else {
+			b.isNested = true
+		}
+	case string:
+		b.from = subject.(string)
+
+		if len(alias) > 0 {
+			b.from = b.from + " " + alias[0]
+		}
+	}
+
+	return b
+}
+
+// TableName returns the table name
+func (b *Builder) TableName() string {
+	if b.optype == insertType {
+		return b.into
+	}
+	return b.from
+}
+
+// Into sets insert table name
+func (b *Builder) Into(tableName string) *Builder {
+	b.into = tableName
+	return b
+}
+
+// Join sets join table and conditions
+func (b *Builder) Join(joinType, joinTable string, joinCond interface{}) *Builder {
+	switch joinCond.(type) {
+	case Cond:
+		b.joins = append(b.joins, join{joinType, joinTable, joinCond.(Cond)})
+	case string:
+		b.joins = append(b.joins, join{joinType, joinTable, Expr(joinCond.(string))})
+	}
+
+	return b
+}
+
+// Union sets union conditions
+func (b *Builder) Union(unionTp string, unionCond *Builder) *Builder {
+	var builder *Builder
+	if b.optype != unionType {
+		builder = &Builder{cond: NewCond()}
+		builder.optype = unionType
+		builder.dialect = b.dialect
+		builder.selects = b.selects
+
+		currentUnions := b.unions
+		// erase sub unions (actually append to new Builder.unions)
+		b.unions = nil
+
+		for e := range currentUnions {
+			currentUnions[e].builder.dialect = b.dialect
+		}
+
+		builder.unions = append(append(builder.unions, union{"", b}), currentUnions...)
+	} else {
+		builder = b
+	}
+
+	if unionCond != nil {
+		if unionCond.dialect == "" && builder.dialect != "" {
+			unionCond.dialect = builder.dialect
+		}
+
+		builder.unions = append(builder.unions, union{unionTp, unionCond})
+	}
+
+	return builder
+}
+
+// Limit sets limitN condition
+func (b *Builder) Limit(limitN int, offset ...int) *Builder {
+	b.limitation = &limit{limitN: limitN}
+
+	if len(offset) > 0 {
+		b.limitation.offset = offset[0]
+	}
+
+	return b
+}
+
+// InnerJoin sets inner join
+func (b *Builder) InnerJoin(joinTable string, joinCond interface{}) *Builder {
+	return b.Join("INNER", joinTable, joinCond)
+}
+
+// LeftJoin sets left join SQL
+func (b *Builder) LeftJoin(joinTable string, joinCond interface{}) *Builder {
+	return b.Join("LEFT", joinTable, joinCond)
+}
+
+// RightJoin sets right join SQL
+func (b *Builder) RightJoin(joinTable string, joinCond interface{}) *Builder {
+	return b.Join("RIGHT", joinTable, joinCond)
+}
+
+// CrossJoin sets cross join SQL
+func (b *Builder) CrossJoin(joinTable string, joinCond interface{}) *Builder {
+	return b.Join("CROSS", joinTable, joinCond)
+}
+
+// FullJoin sets full join SQL
+func (b *Builder) FullJoin(joinTable string, joinCond interface{}) *Builder {
+	return b.Join("FULL", joinTable, joinCond)
+}
+
+// Select sets select SQL
+func (b *Builder) Select(cols ...string) *Builder {
+	b.selects = cols
+	if b.optype == condType {
+		b.optype = selectType
+	}
+	return b
+}
+
+// And sets AND condition
+func (b *Builder) And(cond Cond) *Builder {
+	b.cond = And(b.cond, cond)
+	return b
+}
+
+// Or sets OR condition
+func (b *Builder) Or(cond Cond) *Builder {
+	b.cond = Or(b.cond, cond)
+	return b
+}
+
+type insertColsSorter struct {
+	cols []string
+	vals []interface{}
+}
+
+func (s insertColsSorter) Len() int {
+	return len(s.cols)
+}
+func (s insertColsSorter) Swap(i, j int) {
+	s.cols[i], s.cols[j] = s.cols[j], s.cols[i]
+	s.vals[i], s.vals[j] = s.vals[j], s.vals[i]
+}
+
+func (s insertColsSorter) Less(i, j int) bool {
+	return s.cols[i] < s.cols[j]
+}
+
+// Insert sets insert SQL
+func (b *Builder) Insert(eq ...interface{}) *Builder {
+	if len(eq) > 0 {
+		var paramType = -1
+		for _, e := range eq {
+			switch t := e.(type) {
+			case Eq:
+				if paramType == -1 {
+					paramType = 0
+				}
+				if paramType != 0 {
+					break
+				}
+				for k, v := range t {
+					b.insertCols = append(b.insertCols, k)
+					b.insertVals = append(b.insertVals, v)
+				}
+			case string:
+				if paramType == -1 {
+					paramType = 1
+				}
+				if paramType != 1 {
+					break
+				}
+				b.insertCols = append(b.insertCols, t)
+			}
+		}
+	}
+
+	if len(b.insertCols) == len(b.insertVals) {
+		sort.Sort(insertColsSorter{
+			cols: b.insertCols,
+			vals: b.insertVals,
+		})
+	}
+	b.optype = insertType
+	return b
+}
+
+// Update sets update SQL
+func (b *Builder) Update(updates ...Eq) *Builder {
+	b.updates = make([]Eq, 0, len(updates))
+	for _, update := range updates {
+		if update.IsValid() {
+			b.updates = append(b.updates, update)
+		}
+	}
+	b.optype = updateType
+	return b
+}
+
+// Delete sets delete SQL
+func (b *Builder) Delete(conds ...Cond) *Builder {
+	b.cond = b.cond.And(conds...)
+	b.optype = deleteType
+	return b
+}
+
+// WriteTo implements Writer interface
+func (b *Builder) WriteTo(w Writer) error {
+	switch b.optype {
+	/*case condType:
+	return b.cond.WriteTo(w)*/
+	case selectType:
+		return b.selectWriteTo(w)
+	case insertType:
+		return b.insertWriteTo(w)
+	case updateType:
+		return b.updateWriteTo(w)
+	case deleteType:
+		return b.deleteWriteTo(w)
+	case unionType:
+		return b.unionWriteTo(w)
+	}
+
+	return ErrNotSupportType
+}
+
+// ToSQL convert a builder to SQL and args
+func (b *Builder) ToSQL() (string, []interface{}, error) {
+	w := NewWriter()
+	if err := b.WriteTo(w); err != nil {
+		return "", nil, err
+	}
+
+	// in case of sql.NamedArg in args
+	for e := range w.args {
+		if namedArg, ok := w.args[e].(sql2.NamedArg); ok {
+			w.args[e] = namedArg.Value
+		}
+	}
+
+	var sql = w.writer.String()
+	var err error
+
+	switch b.dialect {
+	case ORACLE, MSSQL:
+		// This is for compatibility with different sql drivers
+		for e := range w.args {
+			w.args[e] = sql2.Named(fmt.Sprintf("p%d", e+1), w.args[e])
+		}
+
+		var prefix string
+		if b.dialect == ORACLE {
+			prefix = ":p"
+		} else {
+			prefix = "@p"
+		}
+
+		if sql, err = ConvertPlaceholder(sql, prefix); err != nil {
+			return "", nil, err
+		}
+	case POSTGRES:
+		if sql, err = ConvertPlaceholder(sql, "$"); err != nil {
+			return "", nil, err
+		}
+	}
+
+	return sql, w.args, nil
+}
+
+// ToBoundSQL
+func (b *Builder) ToBoundSQL() (string, error) {
+	w := NewWriter()
+	if err := b.WriteTo(w); err != nil {
+		return "", err
+	}
+
+	return ConvertToBoundSQL(w.writer.String(), w.args)
+}
diff --git a/vendor/xorm.io/builder/builder_delete.go b/vendor/xorm.io/builder/builder_delete.go
new file mode 100644
index 0000000000..317cc3ff9e
--- /dev/null
+++ b/vendor/xorm.io/builder/builder_delete.go
@@ -0,0 +1,27 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import (
+	"fmt"
+)
+
+// Delete creates a delete Builder
+func Delete(conds ...Cond) *Builder {
+	builder := &Builder{cond: NewCond()}
+	return builder.Delete(conds...)
+}
+
+func (b *Builder) deleteWriteTo(w Writer) error {
+	if len(b.from) <= 0 {
+		return ErrNoTableName
+	}
+
+	if _, err := fmt.Fprintf(w, "DELETE FROM %s WHERE ", b.from); err != nil {
+		return err
+	}
+
+	return b.cond.WriteTo(w)
+}
diff --git a/vendor/xorm.io/builder/builder_insert.go b/vendor/xorm.io/builder/builder_insert.go
new file mode 100644
index 0000000000..202cad51d8
--- /dev/null
+++ b/vendor/xorm.io/builder/builder_insert.go
@@ -0,0 +1,89 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import (
+	"bytes"
+	"fmt"
+)
+
+// Insert creates an insert Builder
+func Insert(eq ...interface{}) *Builder {
+	builder := &Builder{cond: NewCond()}
+	return builder.Insert(eq...)
+}
+
+func (b *Builder) insertSelectWriteTo(w Writer) error {
+	if _, err := fmt.Fprintf(w, "INSERT INTO %s ", b.into); err != nil {
+		return err
+	}
+
+	if len(b.insertCols) > 0 {
+		fmt.Fprintf(w, "(")
+		for _, col := range b.insertCols {
+			fmt.Fprintf(w, col)
+		}
+		fmt.Fprintf(w, ") ")
+	}
+
+	return b.selectWriteTo(w)
+}
+
+func (b *Builder) insertWriteTo(w Writer) error {
+	if len(b.into) <= 0 {
+		return ErrNoTableName
+	}
+	if len(b.insertCols) <= 0 && b.from == "" {
+		return ErrNoColumnToInsert
+	}
+
+	if b.into != "" && b.from != "" {
+		return b.insertSelectWriteTo(w)
+	}
+
+	if _, err := fmt.Fprintf(w, "INSERT INTO %s (", b.into); err != nil {
+		return err
+	}
+
+	var args = make([]interface{}, 0)
+	var bs []byte
+	var valBuffer = bytes.NewBuffer(bs)
+
+	for i, col := range b.insertCols {
+		value := b.insertVals[i]
+		fmt.Fprint(w, col)
+		if e, ok := value.(expr); ok {
+			fmt.Fprintf(valBuffer, "(%s)", e.sql)
+			args = append(args, e.args...)
+		} else {
+			fmt.Fprint(valBuffer, "?")
+			args = append(args, value)
+		}
+
+		if i != len(b.insertCols)-1 {
+			if _, err := fmt.Fprint(w, ","); err != nil {
+				return err
+			}
+			if _, err := fmt.Fprint(valBuffer, ","); err != nil {
+				return err
+			}
+		}
+	}
+
+	if _, err := fmt.Fprint(w, ") Values ("); err != nil {
+		return err
+	}
+
+	if _, err := w.Write(valBuffer.Bytes()); err != nil {
+		return err
+	}
+	if _, err := fmt.Fprint(w, ")"); err != nil {
+		return err
+	}
+
+	w.Append(args...)
+
+	return nil
+}
diff --git a/vendor/xorm.io/builder/builder_limit.go b/vendor/xorm.io/builder/builder_limit.go
new file mode 100644
index 0000000000..82435dacbd
--- /dev/null
+++ b/vendor/xorm.io/builder/builder_limit.go
@@ -0,0 +1,100 @@
+// Copyright 2018 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import (
+	"fmt"
+	"strings"
+)
+
+func (b *Builder) limitWriteTo(w Writer) error {
+	if strings.TrimSpace(b.dialect) == "" {
+		return ErrDialectNotSetUp
+	}
+
+	if b.limitation != nil {
+		limit := b.limitation
+		if limit.offset < 0 || limit.limitN <= 0 {
+			return ErrInvalidLimitation
+		}
+		// erase limit condition
+		b.limitation = nil
+		ow := w.(*BytesWriter)
+
+		switch strings.ToLower(strings.TrimSpace(b.dialect)) {
+		case ORACLE:
+			if len(b.selects) == 0 {
+				b.selects = append(b.selects, "*")
+			}
+
+			var final *Builder
+			selects := b.selects
+			b.selects = append(selects, "ROWNUM RN")
+
+			var wb *Builder
+			if b.optype == unionType {
+				wb = Dialect(b.dialect).Select("at.*", "ROWNUM RN").
+					From(b, "at")
+			} else {
+				wb = b
+			}
+
+			if limit.offset == 0 {
+				final = Dialect(b.dialect).Select(selects...).From(wb, "at").
+					Where(Lte{"at.RN": limit.limitN})
+			} else {
+				sub := Dialect(b.dialect).Select("*").
+					From(b, "at").Where(Lte{"at.RN": limit.offset + limit.limitN})
+
+				final = Dialect(b.dialect).Select(selects...).From(sub, "att").
+					Where(Gt{"att.RN": limit.offset})
+			}
+
+			return final.WriteTo(ow)
+		case SQLITE, MYSQL, POSTGRES:
+			// if type UNION, we need to write previous content back to current writer
+			if b.optype == unionType {
+				if err := b.WriteTo(ow); err != nil {
+					return err
+				}
+			}
+
+			if limit.offset == 0 {
+				fmt.Fprint(ow, " LIMIT ", limit.limitN)
+			} else {
+				fmt.Fprintf(ow, " LIMIT %v OFFSET %v", limit.limitN, limit.offset)
+			}
+		case MSSQL:
+			if len(b.selects) == 0 {
+				b.selects = append(b.selects, "*")
+			}
+
+			var final *Builder
+			selects := b.selects
+			b.selects = append(append([]string{fmt.Sprintf("TOP %d %v", limit.limitN+limit.offset, b.selects[0])},
+				b.selects[1:]...), "ROW_NUMBER() OVER (ORDER BY (SELECT 1)) AS RN")
+
+			var wb *Builder
+			if b.optype == unionType {
+				wb = Dialect(b.dialect).Select("*", "ROW_NUMBER() OVER (ORDER BY (SELECT 1)) AS RN").
+					From(b, "at")
+			} else {
+				wb = b
+			}
+
+			if limit.offset == 0 {
+				final = Dialect(b.dialect).Select(selects...).From(wb, "at")
+			} else {
+				final = Dialect(b.dialect).Select(selects...).From(wb, "at").Where(Gt{"at.RN": limit.offset})
+			}
+
+			return final.WriteTo(ow)
+		default:
+			return ErrNotSupportType
+		}
+	}
+
+	return nil
+}
diff --git a/vendor/xorm.io/builder/builder_select.go b/vendor/xorm.io/builder/builder_select.go
new file mode 100644
index 0000000000..c33b38698b
--- /dev/null
+++ b/vendor/xorm.io/builder/builder_select.go
@@ -0,0 +1,145 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import (
+	"fmt"
+)
+
+// Select creates a select Builder
+func Select(cols ...string) *Builder {
+	builder := &Builder{cond: NewCond()}
+	return builder.Select(cols...)
+}
+
+func (b *Builder) selectWriteTo(w Writer) error {
+	if len(b.from) <= 0 && !b.isNested {
+		return ErrNoTableName
+	}
+
+	// perform limit before writing to writer when b.dialect between ORACLE and MSSQL
+	// this avoid a duplicate writing problem in simple limit query
+	if b.limitation != nil && (b.dialect == ORACLE || b.dialect == MSSQL) {
+		return b.limitWriteTo(w)
+	}
+
+	if _, err := fmt.Fprint(w, "SELECT "); err != nil {
+		return err
+	}
+	if len(b.selects) > 0 {
+		for i, s := range b.selects {
+			if _, err := fmt.Fprint(w, s); err != nil {
+				return err
+			}
+			if i != len(b.selects)-1 {
+				if _, err := fmt.Fprint(w, ","); err != nil {
+					return err
+				}
+			}
+		}
+	} else {
+		if _, err := fmt.Fprint(w, "*"); err != nil {
+			return err
+		}
+	}
+
+	if b.subQuery == nil {
+		if _, err := fmt.Fprint(w, " FROM ", b.from); err != nil {
+			return err
+		}
+	} else {
+		if b.cond.IsValid() && len(b.from) <= 0 {
+			return ErrUnnamedDerivedTable
+		}
+		if b.subQuery.dialect != "" && b.dialect != b.subQuery.dialect {
+			return ErrInconsistentDialect
+		}
+
+		// dialect of sub-query will inherit from the main one (if not set up)
+		if b.dialect != "" && b.subQuery.dialect == "" {
+			b.subQuery.dialect = b.dialect
+		}
+
+		switch b.subQuery.optype {
+		case selectType, unionType:
+			fmt.Fprint(w, " FROM (")
+			if err := b.subQuery.WriteTo(w); err != nil {
+				return err
+			}
+
+			if len(b.from) == 0 {
+				fmt.Fprintf(w, ")")
+			} else {
+				fmt.Fprintf(w, ") %v", b.from)
+			}
+		default:
+			return ErrUnexpectedSubQuery
+		}
+	}
+
+	for _, v := range b.joins {
+		if _, err := fmt.Fprintf(w, " %s JOIN %s ON ", v.joinType, v.joinTable); err != nil {
+			return err
+		}
+
+		if err := v.joinCond.WriteTo(w); err != nil {
+			return err
+		}
+	}
+
+	if b.cond.IsValid() {
+		if _, err := fmt.Fprint(w, " WHERE "); err != nil {
+			return err
+		}
+
+		if err := b.cond.WriteTo(w); err != nil {
+			return err
+		}
+	}
+
+	if len(b.groupBy) > 0 {
+		if _, err := fmt.Fprint(w, " GROUP BY ", b.groupBy); err != nil {
+			return err
+		}
+	}
+
+	if len(b.having) > 0 {
+		if _, err := fmt.Fprint(w, " HAVING ", b.having); err != nil {
+			return err
+		}
+	}
+
+	if len(b.orderBy) > 0 {
+		if _, err := fmt.Fprint(w, " ORDER BY ", b.orderBy); err != nil {
+			return err
+		}
+	}
+
+	if b.limitation != nil {
+		if err := b.limitWriteTo(w); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// OrderBy orderBy SQL
+func (b *Builder) OrderBy(orderBy string) *Builder {
+	b.orderBy = orderBy
+	return b
+}
+
+// GroupBy groupby SQL
+func (b *Builder) GroupBy(groupby string) *Builder {
+	b.groupBy = groupby
+	return b
+}
+
+// Having having SQL
+func (b *Builder) Having(having string) *Builder {
+	b.having = having
+	return b
+}
diff --git a/vendor/xorm.io/builder/builder_union.go b/vendor/xorm.io/builder/builder_union.go
new file mode 100644
index 0000000000..4ba9216178
--- /dev/null
+++ b/vendor/xorm.io/builder/builder_union.go
@@ -0,0 +1,47 @@
+// Copyright 2018 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import (
+	"fmt"
+	"strings"
+)
+
+func (b *Builder) unionWriteTo(w Writer) error {
+	if b.limitation != nil || b.cond.IsValid() ||
+		b.orderBy != "" || b.having != "" || b.groupBy != "" {
+		return ErrNotUnexpectedUnionConditions
+	}
+
+	for idx, u := range b.unions {
+		current := u.builder
+		if current.optype != selectType {
+			return ErrUnsupportedUnionMembers
+		}
+
+		if len(b.unions) == 1 {
+			if err := current.selectWriteTo(w); err != nil {
+				return err
+			}
+		} else {
+			if b.dialect != "" && b.dialect != current.dialect {
+				return ErrInconsistentDialect
+			}
+
+			if idx != 0 {
+				fmt.Fprint(w, fmt.Sprintf(" UNION %v ", strings.ToUpper(u.unionType)))
+			}
+			fmt.Fprint(w, "(")
+
+			if err := current.selectWriteTo(w); err != nil {
+				return err
+			}
+
+			fmt.Fprint(w, ")")
+		}
+	}
+
+	return nil
+}
diff --git a/vendor/xorm.io/builder/builder_update.go b/vendor/xorm.io/builder/builder_update.go
new file mode 100644
index 0000000000..37b4551526
--- /dev/null
+++ b/vendor/xorm.io/builder/builder_update.go
@@ -0,0 +1,46 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import (
+	"fmt"
+)
+
+// Update creates an update Builder
+func Update(updates ...Eq) *Builder {
+	builder := &Builder{cond: NewCond()}
+	return builder.Update(updates...)
+}
+
+func (b *Builder) updateWriteTo(w Writer) error {
+	if len(b.from) <= 0 {
+		return ErrNoTableName
+	}
+	if len(b.updates) <= 0 {
+		return ErrNoColumnToUpdate
+	}
+
+	if _, err := fmt.Fprintf(w, "UPDATE %s SET ", b.from); err != nil {
+		return err
+	}
+
+	for i, s := range b.updates {
+		if err := s.opWriteTo(",", w); err != nil {
+			return err
+		}
+
+		if i != len(b.updates)-1 {
+			if _, err := fmt.Fprint(w, ","); err != nil {
+				return err
+			}
+		}
+	}
+
+	if _, err := fmt.Fprint(w, " WHERE "); err != nil {
+		return err
+	}
+
+	return b.cond.WriteTo(w)
+}
diff --git a/vendor/xorm.io/builder/cond.go b/vendor/xorm.io/builder/cond.go
new file mode 100644
index 0000000000..e44173bbd5
--- /dev/null
+++ b/vendor/xorm.io/builder/cond.go
@@ -0,0 +1,74 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import (
+	"io"
+)
+
+// Writer defines the interface
+type Writer interface {
+	io.Writer
+	Append(...interface{})
+}
+
+var _ Writer = NewWriter()
+
+// BytesWriter implments Writer and save SQL in bytes.Buffer
+type BytesWriter struct {
+	writer *StringBuilder
+	args   []interface{}
+}
+
+// NewWriter creates a new string writer
+func NewWriter() *BytesWriter {
+	w := &BytesWriter{
+		writer: &StringBuilder{},
+	}
+	return w
+}
+
+// Write writes data to Writer
+func (s *BytesWriter) Write(buf []byte) (int, error) {
+	return s.writer.Write(buf)
+}
+
+// Append appends args to Writer
+func (s *BytesWriter) Append(args ...interface{}) {
+	s.args = append(s.args, args...)
+}
+
+// Cond defines an interface
+type Cond interface {
+	WriteTo(Writer) error
+	And(...Cond) Cond
+	Or(...Cond) Cond
+	IsValid() bool
+}
+
+type condEmpty struct{}
+
+var _ Cond = condEmpty{}
+
+// NewCond creates an empty condition
+func NewCond() Cond {
+	return condEmpty{}
+}
+
+func (condEmpty) WriteTo(w Writer) error {
+	return nil
+}
+
+func (condEmpty) And(conds ...Cond) Cond {
+	return And(conds...)
+}
+
+func (condEmpty) Or(conds ...Cond) Cond {
+	return Or(conds...)
+}
+
+func (condEmpty) IsValid() bool {
+	return false
+}
diff --git a/vendor/xorm.io/builder/cond_and.go b/vendor/xorm.io/builder/cond_and.go
new file mode 100644
index 0000000000..e30bd186cd
--- /dev/null
+++ b/vendor/xorm.io/builder/cond_and.go
@@ -0,0 +1,61 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import "fmt"
+
+type condAnd []Cond
+
+var _ Cond = condAnd{}
+
+// And generates AND conditions
+func And(conds ...Cond) Cond {
+	var result = make(condAnd, 0, len(conds))
+	for _, cond := range conds {
+		if cond == nil || !cond.IsValid() {
+			continue
+		}
+		result = append(result, cond)
+	}
+	return result
+}
+
+func (and condAnd) WriteTo(w Writer) error {
+	for i, cond := range and {
+		_, isOr := cond.(condOr)
+		_, isExpr := cond.(expr)
+		wrap := isOr || isExpr
+		if wrap {
+			fmt.Fprint(w, "(")
+		}
+
+		err := cond.WriteTo(w)
+		if err != nil {
+			return err
+		}
+
+		if wrap {
+			fmt.Fprint(w, ")")
+		}
+
+		if i != len(and)-1 {
+			fmt.Fprint(w, " AND ")
+		}
+	}
+
+	return nil
+}
+
+func (and condAnd) And(conds ...Cond) Cond {
+	return And(and, And(conds...))
+}
+
+func (and condAnd) Or(conds ...Cond) Cond {
+	return Or(and, Or(conds...))
+}
+
+func (and condAnd) IsValid() bool {
+	return len(and) > 0
+}
diff --git a/vendor/xorm.io/builder/cond_between.go b/vendor/xorm.io/builder/cond_between.go
new file mode 100644
index 0000000000..10e0b83152
--- /dev/null
+++ b/vendor/xorm.io/builder/cond_between.go
@@ -0,0 +1,65 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import "fmt"
+
+// Between implmentes between condition
+type Between struct {
+	Col     string
+	LessVal interface{}
+	MoreVal interface{}
+}
+
+var _ Cond = Between{}
+
+// WriteTo write data to Writer
+func (between Between) WriteTo(w Writer) error {
+	if _, err := fmt.Fprintf(w, "%s BETWEEN ", between.Col); err != nil {
+		return err
+	}
+	if lv, ok := between.LessVal.(expr); ok {
+		if err := lv.WriteTo(w); err != nil {
+			return err
+		}
+	} else {
+		if _, err := fmt.Fprint(w, "?"); err != nil {
+			return err
+		}
+		w.Append(between.LessVal)
+	}
+
+	if _, err := fmt.Fprint(w, " AND "); err != nil {
+		return err
+	}
+
+	if mv, ok := between.MoreVal.(expr); ok {
+		if err := mv.WriteTo(w); err != nil {
+			return err
+		}
+	} else {
+		if _, err := fmt.Fprint(w, "?"); err != nil {
+			return err
+		}
+		w.Append(between.MoreVal)
+	}
+
+	return nil
+}
+
+// And implments And with other conditions
+func (between Between) And(conds ...Cond) Cond {
+	return And(between, And(conds...))
+}
+
+// Or implments Or with other conditions
+func (between Between) Or(conds ...Cond) Cond {
+	return Or(between, Or(conds...))
+}
+
+// IsValid tests if the condition is valid
+func (between Between) IsValid() bool {
+	return len(between.Col) > 0
+}
diff --git a/vendor/xorm.io/builder/cond_compare.go b/vendor/xorm.io/builder/cond_compare.go
new file mode 100644
index 0000000000..1c293719c0
--- /dev/null
+++ b/vendor/xorm.io/builder/cond_compare.go
@@ -0,0 +1,160 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import "fmt"
+
+// WriteMap writes conditions' SQL to Writer, op could be =, <>, >, <, <=, >= and etc.
+func WriteMap(w Writer, data map[string]interface{}, op string) error {
+	var args = make([]interface{}, 0, len(data))
+	var i = 0
+	keys := make([]string, 0, len(data))
+	for k := range data {
+		keys = append(keys, k)
+	}
+
+	for _, k := range keys {
+		v := data[k]
+		switch v.(type) {
+		case expr:
+			if _, err := fmt.Fprintf(w, "%s%s(", k, op); err != nil {
+				return err
+			}
+
+			if err := v.(expr).WriteTo(w); err != nil {
+				return err
+			}
+
+			if _, err := fmt.Fprintf(w, ")"); err != nil {
+				return err
+			}
+		case *Builder:
+			if _, err := fmt.Fprintf(w, "%s%s(", k, op); err != nil {
+				return err
+			}
+
+			if err := v.(*Builder).WriteTo(w); err != nil {
+				return err
+			}
+
+			if _, err := fmt.Fprintf(w, ")"); err != nil {
+				return err
+			}
+		default:
+			if _, err := fmt.Fprintf(w, "%s%s?", k, op); err != nil {
+				return err
+			}
+			args = append(args, v)
+		}
+		if i != len(data)-1 {
+			if _, err := fmt.Fprint(w, " AND "); err != nil {
+				return err
+			}
+		}
+		i = i + 1
+	}
+	w.Append(args...)
+	return nil
+}
+
+// Lt defines < condition
+type Lt map[string]interface{}
+
+var _ Cond = Lt{}
+
+// WriteTo write SQL to Writer
+func (lt Lt) WriteTo(w Writer) error {
+	return WriteMap(w, lt, "<")
+}
+
+// And implements And with other conditions
+func (lt Lt) And(conds ...Cond) Cond {
+	return condAnd{lt, And(conds...)}
+}
+
+// Or implements Or with other conditions
+func (lt Lt) Or(conds ...Cond) Cond {
+	return condOr{lt, Or(conds...)}
+}
+
+// IsValid tests if this Eq is valid
+func (lt Lt) IsValid() bool {
+	return len(lt) > 0
+}
+
+// Lte defines <= condition
+type Lte map[string]interface{}
+
+var _ Cond = Lte{}
+
+// WriteTo write SQL to Writer
+func (lte Lte) WriteTo(w Writer) error {
+	return WriteMap(w, lte, "<=")
+}
+
+// And implements And with other conditions
+func (lte Lte) And(conds ...Cond) Cond {
+	return And(lte, And(conds...))
+}
+
+// Or implements Or with other conditions
+func (lte Lte) Or(conds ...Cond) Cond {
+	return Or(lte, Or(conds...))
+}
+
+// IsValid tests if this Eq is valid
+func (lte Lte) IsValid() bool {
+	return len(lte) > 0
+}
+
+// Gt defines > condition
+type Gt map[string]interface{}
+
+var _ Cond = Gt{}
+
+// WriteTo write SQL to Writer
+func (gt Gt) WriteTo(w Writer) error {
+	return WriteMap(w, gt, ">")
+}
+
+// And implements And with other conditions
+func (gt Gt) And(conds ...Cond) Cond {
+	return And(gt, And(conds...))
+}
+
+// Or implements Or with other conditions
+func (gt Gt) Or(conds ...Cond) Cond {
+	return Or(gt, Or(conds...))
+}
+
+// IsValid tests if this Eq is valid
+func (gt Gt) IsValid() bool {
+	return len(gt) > 0
+}
+
+// Gte defines >= condition
+type Gte map[string]interface{}
+
+var _ Cond = Gte{}
+
+// WriteTo write SQL to Writer
+func (gte Gte) WriteTo(w Writer) error {
+	return WriteMap(w, gte, ">=")
+}
+
+// And implements And with other conditions
+func (gte Gte) And(conds ...Cond) Cond {
+	return And(gte, And(conds...))
+}
+
+// Or implements Or with other conditions
+func (gte Gte) Or(conds ...Cond) Cond {
+	return Or(gte, Or(conds...))
+}
+
+// IsValid tests if this Eq is valid
+func (gte Gte) IsValid() bool {
+	return len(gte) > 0
+}
diff --git a/vendor/xorm.io/builder/cond_eq.go b/vendor/xorm.io/builder/cond_eq.go
new file mode 100644
index 0000000000..79d795e6dd
--- /dev/null
+++ b/vendor/xorm.io/builder/cond_eq.go
@@ -0,0 +1,112 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import (
+	"fmt"
+	"sort"
+)
+
+// Incr implements a type used by Eq
+type Incr int
+
+// Decr implements a type used by Eq
+type Decr int
+
+// Eq defines equals conditions
+type Eq map[string]interface{}
+
+var _ Cond = Eq{}
+
+func (eq Eq) opWriteTo(op string, w Writer) error {
+	var i = 0
+	for _, k := range eq.sortedKeys() {
+		v := eq[k]
+		switch v.(type) {
+		case []int, []int64, []string, []int32, []int16, []int8, []uint, []uint64, []uint32, []uint16, []interface{}:
+			if err := In(k, v).WriteTo(w); err != nil {
+				return err
+			}
+		case expr:
+			if _, err := fmt.Fprintf(w, "%s=(", k); err != nil {
+				return err
+			}
+
+			if err := v.(expr).WriteTo(w); err != nil {
+				return err
+			}
+
+			if _, err := fmt.Fprintf(w, ")"); err != nil {
+				return err
+			}
+		case *Builder:
+			if _, err := fmt.Fprintf(w, "%s=(", k); err != nil {
+				return err
+			}
+
+			if err := v.(*Builder).WriteTo(w); err != nil {
+				return err
+			}
+
+			if _, err := fmt.Fprintf(w, ")"); err != nil {
+				return err
+			}
+		case Incr:
+			if _, err := fmt.Fprintf(w, "%s=%s+?", k, k); err != nil {
+				return err
+			}
+			w.Append(int(v.(Incr)))
+		case Decr:
+			if _, err := fmt.Fprintf(w, "%s=%s-?", k, k); err != nil {
+				return err
+			}
+			w.Append(int(v.(Decr)))
+		default:
+			if _, err := fmt.Fprintf(w, "%s=?", k); err != nil {
+				return err
+			}
+			w.Append(v)
+		}
+		if i != len(eq)-1 {
+			if _, err := fmt.Fprint(w, op); err != nil {
+				return err
+			}
+		}
+		i = i + 1
+	}
+	return nil
+}
+
+// WriteTo writes SQL to Writer
+func (eq Eq) WriteTo(w Writer) error {
+	return eq.opWriteTo(" AND ", w)
+}
+
+// And implements And with other conditions
+func (eq Eq) And(conds ...Cond) Cond {
+	return And(eq, And(conds...))
+}
+
+// Or implements Or with other conditions
+func (eq Eq) Or(conds ...Cond) Cond {
+	return Or(eq, Or(conds...))
+}
+
+// IsValid tests if this Eq is valid
+func (eq Eq) IsValid() bool {
+	return len(eq) > 0
+}
+
+// sortedKeys returns all keys of this Eq sorted with sort.Strings.
+// It is used internally for consistent ordering when generating
+// SQL, see https://github.com/go-xorm/builder/issues/10
+func (eq Eq) sortedKeys() []string {
+	keys := make([]string, 0, len(eq))
+	for key := range eq {
+		keys = append(keys, key)
+	}
+	sort.Strings(keys)
+	return keys
+}
diff --git a/vendor/xorm.io/builder/cond_expr.go b/vendor/xorm.io/builder/cond_expr.go
new file mode 100644
index 0000000000..e5ed572b15
--- /dev/null
+++ b/vendor/xorm.io/builder/cond_expr.go
@@ -0,0 +1,39 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import "fmt"
+
+type expr struct {
+	sql  string
+	args []interface{}
+}
+
+var _ Cond = expr{}
+
+// Expr generate customerize SQL
+func Expr(sql string, args ...interface{}) Cond {
+	return expr{sql, args}
+}
+
+func (expr expr) WriteTo(w Writer) error {
+	if _, err := fmt.Fprint(w, expr.sql); err != nil {
+		return err
+	}
+	w.Append(expr.args...)
+	return nil
+}
+
+func (expr expr) And(conds ...Cond) Cond {
+	return And(expr, And(conds...))
+}
+
+func (expr expr) Or(conds ...Cond) Cond {
+	return Or(expr, Or(conds...))
+}
+
+func (expr expr) IsValid() bool {
+	return len(expr.sql) > 0
+}
diff --git a/vendor/xorm.io/builder/cond_if.go b/vendor/xorm.io/builder/cond_if.go
new file mode 100644
index 0000000000..af9eb321fd
--- /dev/null
+++ b/vendor/xorm.io/builder/cond_if.go
@@ -0,0 +1,49 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+type condIf struct {
+	condition bool
+	condTrue  Cond
+	condFalse Cond
+}
+
+var _ Cond = condIf{}
+
+// If returns Cond via condition
+func If(condition bool, condTrue Cond, condFalse ...Cond) Cond {
+	var c = condIf{
+		condition: condition,
+		condTrue:  condTrue,
+	}
+	if len(condFalse) > 0 {
+		c.condFalse = condFalse[0]
+	}
+	return c
+}
+
+func (condIf condIf) WriteTo(w Writer) error {
+	if condIf.condition {
+		return condIf.condTrue.WriteTo(w)
+	} else if condIf.condFalse != nil {
+		return condIf.condFalse.WriteTo(w)
+	}
+	return nil
+}
+
+func (condIf condIf) And(conds ...Cond) Cond {
+	return And(condIf, And(conds...))
+}
+
+func (condIf condIf) Or(conds ...Cond) Cond {
+	return Or(condIf, Or(conds...))
+}
+
+func (condIf condIf) IsValid() bool {
+	if condIf.condition {
+		return condIf.condTrue != nil
+	}
+	return condIf.condFalse != nil
+}
diff --git a/vendor/xorm.io/builder/cond_in.go b/vendor/xorm.io/builder/cond_in.go
new file mode 100644
index 0000000000..f6366d35c2
--- /dev/null
+++ b/vendor/xorm.io/builder/cond_in.go
@@ -0,0 +1,237 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+type condIn struct {
+	col  string
+	vals []interface{}
+}
+
+var _ Cond = condIn{}
+
+// In generates IN condition
+func In(col string, values ...interface{}) Cond {
+	return condIn{col, values}
+}
+
+func (condIn condIn) handleBlank(w Writer) error {
+	_, err := fmt.Fprint(w, "0=1")
+	return err
+}
+
+func (condIn condIn) WriteTo(w Writer) error {
+	if len(condIn.vals) <= 0 {
+		return condIn.handleBlank(w)
+	}
+
+	switch condIn.vals[0].(type) {
+	case []int8:
+		vals := condIn.vals[0].([]int8)
+		if len(vals) <= 0 {
+			return condIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s IN (%s)", condIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []int16:
+		vals := condIn.vals[0].([]int16)
+		if len(vals) <= 0 {
+			return condIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s IN (%s)", condIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []int:
+		vals := condIn.vals[0].([]int)
+		if len(vals) <= 0 {
+			return condIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s IN (%s)", condIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []int32:
+		vals := condIn.vals[0].([]int32)
+		if len(vals) <= 0 {
+			return condIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s IN (%s)", condIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []int64:
+		vals := condIn.vals[0].([]int64)
+		if len(vals) <= 0 {
+			return condIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s IN (%s)", condIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []uint8:
+		vals := condIn.vals[0].([]uint8)
+		if len(vals) <= 0 {
+			return condIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s IN (%s)", condIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []uint16:
+		vals := condIn.vals[0].([]uint16)
+		if len(vals) <= 0 {
+			return condIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s IN (%s)", condIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []uint:
+		vals := condIn.vals[0].([]uint)
+		if len(vals) <= 0 {
+			return condIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s IN (%s)", condIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []uint32:
+		vals := condIn.vals[0].([]uint32)
+		if len(vals) <= 0 {
+			return condIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s IN (%s)", condIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []uint64:
+		vals := condIn.vals[0].([]uint64)
+		if len(vals) <= 0 {
+			return condIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s IN (%s)", condIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []string:
+		vals := condIn.vals[0].([]string)
+		if len(vals) <= 0 {
+			return condIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s IN (%s)", condIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []interface{}:
+		vals := condIn.vals[0].([]interface{})
+		if len(vals) <= 0 {
+			return condIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s IN (%s)", condIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		w.Append(vals...)
+	case expr:
+		val := condIn.vals[0].(expr)
+		if _, err := fmt.Fprintf(w, "%s IN (", condIn.col); err != nil {
+			return err
+		}
+		if err := val.WriteTo(w); err != nil {
+			return err
+		}
+		if _, err := fmt.Fprintf(w, ")"); err != nil {
+			return err
+		}
+	case *Builder:
+		bd := condIn.vals[0].(*Builder)
+		if _, err := fmt.Fprintf(w, "%s IN (", condIn.col); err != nil {
+			return err
+		}
+		if err := bd.WriteTo(w); err != nil {
+			return err
+		}
+		if _, err := fmt.Fprintf(w, ")"); err != nil {
+			return err
+		}
+	default:
+		v := reflect.ValueOf(condIn.vals[0])
+		if v.Kind() == reflect.Slice {
+			l := v.Len()
+			if l == 0 {
+				return condIn.handleBlank(w)
+			}
+
+			questionMark := strings.Repeat("?,", l)
+			if _, err := fmt.Fprintf(w, "%s IN (%s)", condIn.col, questionMark[:len(questionMark)-1]); err != nil {
+				return err
+			}
+
+			for i := 0; i < l; i++ {
+				w.Append(v.Index(i).Interface())
+			}
+		} else {
+			questionMark := strings.Repeat("?,", len(condIn.vals))
+			if _, err := fmt.Fprintf(w, "%s IN (%s)", condIn.col, questionMark[:len(questionMark)-1]); err != nil {
+				return err
+			}
+			w.Append(condIn.vals...)
+		}
+	}
+	return nil
+}
+
+func (condIn condIn) And(conds ...Cond) Cond {
+	return And(condIn, And(conds...))
+}
+
+func (condIn condIn) Or(conds ...Cond) Cond {
+	return Or(condIn, Or(conds...))
+}
+
+func (condIn condIn) IsValid() bool {
+	return len(condIn.col) > 0 && len(condIn.vals) > 0
+}
diff --git a/vendor/xorm.io/builder/cond_like.go b/vendor/xorm.io/builder/cond_like.go
new file mode 100644
index 0000000000..e34202f8b0
--- /dev/null
+++ b/vendor/xorm.io/builder/cond_like.go
@@ -0,0 +1,41 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import "fmt"
+
+// Like defines like condition
+type Like [2]string
+
+var _ Cond = Like{"", ""}
+
+// WriteTo write SQL to Writer
+func (like Like) WriteTo(w Writer) error {
+	if _, err := fmt.Fprintf(w, "%s LIKE ?", like[0]); err != nil {
+		return err
+	}
+	// FIXME: if use other regular express, this will be failed. but for compatible, keep this
+	if like[1][0] == '%' || like[1][len(like[1])-1] == '%' {
+		w.Append(like[1])
+	} else {
+		w.Append("%" + like[1] + "%")
+	}
+	return nil
+}
+
+// And implements And with other conditions
+func (like Like) And(conds ...Cond) Cond {
+	return And(like, And(conds...))
+}
+
+// Or implements Or with other conditions
+func (like Like) Or(conds ...Cond) Cond {
+	return Or(like, Or(conds...))
+}
+
+// IsValid tests if this condition is valid
+func (like Like) IsValid() bool {
+	return len(like[0]) > 0 && len(like[1]) > 0
+}
diff --git a/vendor/xorm.io/builder/cond_neq.go b/vendor/xorm.io/builder/cond_neq.go
new file mode 100644
index 0000000000..3a8f3136d9
--- /dev/null
+++ b/vendor/xorm.io/builder/cond_neq.go
@@ -0,0 +1,94 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import (
+	"fmt"
+	"sort"
+)
+
+// Neq defines not equal conditions
+type Neq map[string]interface{}
+
+var _ Cond = Neq{}
+
+// WriteTo writes SQL to Writer
+func (neq Neq) WriteTo(w Writer) error {
+	var args = make([]interface{}, 0, len(neq))
+	var i = 0
+	for _, k := range neq.sortedKeys() {
+		v := neq[k]
+		switch v.(type) {
+		case []int, []int64, []string, []int32, []int16, []int8:
+			if err := NotIn(k, v).WriteTo(w); err != nil {
+				return err
+			}
+		case expr:
+			if _, err := fmt.Fprintf(w, "%s<>(", k); err != nil {
+				return err
+			}
+
+			if err := v.(expr).WriteTo(w); err != nil {
+				return err
+			}
+
+			if _, err := fmt.Fprintf(w, ")"); err != nil {
+				return err
+			}
+		case *Builder:
+			if _, err := fmt.Fprintf(w, "%s<>(", k); err != nil {
+				return err
+			}
+
+			if err := v.(*Builder).WriteTo(w); err != nil {
+				return err
+			}
+
+			if _, err := fmt.Fprintf(w, ")"); err != nil {
+				return err
+			}
+		default:
+			if _, err := fmt.Fprintf(w, "%s<>?", k); err != nil {
+				return err
+			}
+			args = append(args, v)
+		}
+		if i != len(neq)-1 {
+			if _, err := fmt.Fprint(w, " AND "); err != nil {
+				return err
+			}
+		}
+		i = i + 1
+	}
+	w.Append(args...)
+	return nil
+}
+
+// And implements And with other conditions
+func (neq Neq) And(conds ...Cond) Cond {
+	return And(neq, And(conds...))
+}
+
+// Or implements Or with other conditions
+func (neq Neq) Or(conds ...Cond) Cond {
+	return Or(neq, Or(conds...))
+}
+
+// IsValid tests if this condition is valid
+func (neq Neq) IsValid() bool {
+	return len(neq) > 0
+}
+
+// sortedKeys returns all keys of this Neq sorted with sort.Strings.
+// It is used internally for consistent ordering when generating
+// SQL, see https://github.com/go-xorm/builder/issues/10
+func (neq Neq) sortedKeys() []string {
+	keys := make([]string, 0, len(neq))
+	for key := range neq {
+		keys = append(keys, key)
+	}
+	sort.Strings(keys)
+	return keys
+}
diff --git a/vendor/xorm.io/builder/cond_not.go b/vendor/xorm.io/builder/cond_not.go
new file mode 100644
index 0000000000..667dfe7293
--- /dev/null
+++ b/vendor/xorm.io/builder/cond_not.go
@@ -0,0 +1,77 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import "fmt"
+
+// Not defines NOT condition
+type Not [1]Cond
+
+var _ Cond = Not{}
+
+// WriteTo writes SQL to Writer
+func (not Not) WriteTo(w Writer) error {
+	if _, err := fmt.Fprint(w, "NOT "); err != nil {
+		return err
+	}
+	switch not[0].(type) {
+	case condAnd, condOr:
+		if _, err := fmt.Fprint(w, "("); err != nil {
+			return err
+		}
+	case Eq:
+		if len(not[0].(Eq)) > 1 {
+			if _, err := fmt.Fprint(w, "("); err != nil {
+				return err
+			}
+		}
+	case Neq:
+		if len(not[0].(Neq)) > 1 {
+			if _, err := fmt.Fprint(w, "("); err != nil {
+				return err
+			}
+		}
+	}
+
+	if err := not[0].WriteTo(w); err != nil {
+		return err
+	}
+
+	switch not[0].(type) {
+	case condAnd, condOr:
+		if _, err := fmt.Fprint(w, ")"); err != nil {
+			return err
+		}
+	case Eq:
+		if len(not[0].(Eq)) > 1 {
+			if _, err := fmt.Fprint(w, ")"); err != nil {
+				return err
+			}
+		}
+	case Neq:
+		if len(not[0].(Neq)) > 1 {
+			if _, err := fmt.Fprint(w, ")"); err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+// And implements And with other conditions
+func (not Not) And(conds ...Cond) Cond {
+	return And(not, And(conds...))
+}
+
+// Or implements Or with other conditions
+func (not Not) Or(conds ...Cond) Cond {
+	return Or(not, Or(conds...))
+}
+
+// IsValid tests if this condition is valid
+func (not Not) IsValid() bool {
+	return not[0] != nil && not[0].IsValid()
+}
diff --git a/vendor/xorm.io/builder/cond_notin.go b/vendor/xorm.io/builder/cond_notin.go
new file mode 100644
index 0000000000..dc3ac49a35
--- /dev/null
+++ b/vendor/xorm.io/builder/cond_notin.go
@@ -0,0 +1,234 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+type condNotIn condIn
+
+var _ Cond = condNotIn{}
+
+// NotIn generate NOT IN condition
+func NotIn(col string, values ...interface{}) Cond {
+	return condNotIn{col, values}
+}
+
+func (condNotIn condNotIn) handleBlank(w Writer) error {
+	_, err := fmt.Fprint(w, "0=0")
+	return err
+}
+
+func (condNotIn condNotIn) WriteTo(w Writer) error {
+	if len(condNotIn.vals) <= 0 {
+		return condNotIn.handleBlank(w)
+	}
+
+	switch condNotIn.vals[0].(type) {
+	case []int8:
+		vals := condNotIn.vals[0].([]int8)
+		if len(vals) <= 0 {
+			return condNotIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s NOT IN (%s)", condNotIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []int16:
+		vals := condNotIn.vals[0].([]int16)
+		if len(vals) <= 0 {
+			return condNotIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s NOT IN (%s)", condNotIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []int:
+		vals := condNotIn.vals[0].([]int)
+		if len(vals) <= 0 {
+			return condNotIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s NOT IN (%s)", condNotIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []int32:
+		vals := condNotIn.vals[0].([]int32)
+		if len(vals) <= 0 {
+			return condNotIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s NOT IN (%s)", condNotIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []int64:
+		vals := condNotIn.vals[0].([]int64)
+		if len(vals) <= 0 {
+			return condNotIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s NOT IN (%s)", condNotIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []uint8:
+		vals := condNotIn.vals[0].([]uint8)
+		if len(vals) <= 0 {
+			return condNotIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s NOT IN (%s)", condNotIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []uint16:
+		vals := condNotIn.vals[0].([]uint16)
+		if len(vals) <= 0 {
+			return condNotIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s NOT IN (%s)", condNotIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []uint:
+		vals := condNotIn.vals[0].([]uint)
+		if len(vals) <= 0 {
+			return condNotIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s NOT IN (%s)", condNotIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []uint32:
+		vals := condNotIn.vals[0].([]uint32)
+		if len(vals) <= 0 {
+			return condNotIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s NOT IN (%s)", condNotIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []uint64:
+		vals := condNotIn.vals[0].([]uint64)
+		if len(vals) <= 0 {
+			return condNotIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s NOT IN (%s)", condNotIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []string:
+		vals := condNotIn.vals[0].([]string)
+		if len(vals) <= 0 {
+			return condNotIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s NOT IN (%s)", condNotIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		for _, val := range vals {
+			w.Append(val)
+		}
+	case []interface{}:
+		vals := condNotIn.vals[0].([]interface{})
+		if len(vals) <= 0 {
+			return condNotIn.handleBlank(w)
+		}
+		questionMark := strings.Repeat("?,", len(vals))
+		if _, err := fmt.Fprintf(w, "%s NOT IN (%s)", condNotIn.col, questionMark[:len(questionMark)-1]); err != nil {
+			return err
+		}
+		w.Append(vals...)
+	case expr:
+		val := condNotIn.vals[0].(expr)
+		if _, err := fmt.Fprintf(w, "%s NOT IN (", condNotIn.col); err != nil {
+			return err
+		}
+		if err := val.WriteTo(w); err != nil {
+			return err
+		}
+		if _, err := fmt.Fprintf(w, ")"); err != nil {
+			return err
+		}
+	case *Builder:
+		val := condNotIn.vals[0].(*Builder)
+		if _, err := fmt.Fprintf(w, "%s NOT IN (", condNotIn.col); err != nil {
+			return err
+		}
+		if err := val.WriteTo(w); err != nil {
+			return err
+		}
+		if _, err := fmt.Fprintf(w, ")"); err != nil {
+			return err
+		}
+	default:
+		v := reflect.ValueOf(condNotIn.vals[0])
+		if v.Kind() == reflect.Slice {
+			l := v.Len()
+			if l == 0 {
+				return condNotIn.handleBlank(w)
+			}
+
+			questionMark := strings.Repeat("?,", l)
+			if _, err := fmt.Fprintf(w, "%s NOT IN (%s)", condNotIn.col, questionMark[:len(questionMark)-1]); err != nil {
+				return err
+			}
+
+			for i := 0; i < l; i++ {
+				w.Append(v.Index(i).Interface())
+			}
+		} else {
+			questionMark := strings.Repeat("?,", len(condNotIn.vals))
+			if _, err := fmt.Fprintf(w, "%s NOT IN (%s)", condNotIn.col, questionMark[:len(questionMark)-1]); err != nil {
+				return err
+			}
+			w.Append(condNotIn.vals...)
+		}
+	}
+	return nil
+}
+
+func (condNotIn condNotIn) And(conds ...Cond) Cond {
+	return And(condNotIn, And(conds...))
+}
+
+func (condNotIn condNotIn) Or(conds ...Cond) Cond {
+	return Or(condNotIn, Or(conds...))
+}
+
+func (condNotIn condNotIn) IsValid() bool {
+	return len(condNotIn.col) > 0 && len(condNotIn.vals) > 0
+}
diff --git a/vendor/xorm.io/builder/cond_null.go b/vendor/xorm.io/builder/cond_null.go
new file mode 100644
index 0000000000..bf2aaf8518
--- /dev/null
+++ b/vendor/xorm.io/builder/cond_null.go
@@ -0,0 +1,59 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import "fmt"
+
+// IsNull defines IS NULL condition
+type IsNull [1]string
+
+var _ Cond = IsNull{""}
+
+// WriteTo write SQL to Writer
+func (isNull IsNull) WriteTo(w Writer) error {
+	_, err := fmt.Fprintf(w, "%s IS NULL", isNull[0])
+	return err
+}
+
+// And implements And with other conditions
+func (isNull IsNull) And(conds ...Cond) Cond {
+	return And(isNull, And(conds...))
+}
+
+// Or implements Or with other conditions
+func (isNull IsNull) Or(conds ...Cond) Cond {
+	return Or(isNull, Or(conds...))
+}
+
+// IsValid tests if this condition is valid
+func (isNull IsNull) IsValid() bool {
+	return len(isNull[0]) > 0
+}
+
+// NotNull defines NOT NULL condition
+type NotNull [1]string
+
+var _ Cond = NotNull{""}
+
+// WriteTo write SQL to Writer
+func (notNull NotNull) WriteTo(w Writer) error {
+	_, err := fmt.Fprintf(w, "%s IS NOT NULL", notNull[0])
+	return err
+}
+
+// And implements And with other conditions
+func (notNull NotNull) And(conds ...Cond) Cond {
+	return And(notNull, And(conds...))
+}
+
+// Or implements Or with other conditions
+func (notNull NotNull) Or(conds ...Cond) Cond {
+	return Or(notNull, Or(conds...))
+}
+
+// IsValid tests if this condition is valid
+func (notNull NotNull) IsValid() bool {
+	return len(notNull[0]) > 0
+}
diff --git a/vendor/xorm.io/builder/cond_or.go b/vendor/xorm.io/builder/cond_or.go
new file mode 100644
index 0000000000..52442653a8
--- /dev/null
+++ b/vendor/xorm.io/builder/cond_or.go
@@ -0,0 +1,69 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import "fmt"
+
+type condOr []Cond
+
+var _ Cond = condOr{}
+
+// Or sets OR conditions
+func Or(conds ...Cond) Cond {
+	var result = make(condOr, 0, len(conds))
+	for _, cond := range conds {
+		if cond == nil || !cond.IsValid() {
+			continue
+		}
+		result = append(result, cond)
+	}
+	return result
+}
+
+// WriteTo implments Cond
+func (o condOr) WriteTo(w Writer) error {
+	for i, cond := range o {
+		var needQuote bool
+		switch cond.(type) {
+		case condAnd, expr:
+			needQuote = true
+		case Eq:
+			needQuote = (len(cond.(Eq)) > 1)
+		case Neq:
+			needQuote = (len(cond.(Neq)) > 1)
+		}
+
+		if needQuote {
+			fmt.Fprint(w, "(")
+		}
+
+		err := cond.WriteTo(w)
+		if err != nil {
+			return err
+		}
+
+		if needQuote {
+			fmt.Fprint(w, ")")
+		}
+
+		if i != len(o)-1 {
+			fmt.Fprint(w, " OR ")
+		}
+	}
+
+	return nil
+}
+
+func (o condOr) And(conds ...Cond) Cond {
+	return And(o, And(conds...))
+}
+
+func (o condOr) Or(conds ...Cond) Cond {
+	return Or(o, Or(conds...))
+}
+
+func (o condOr) IsValid() bool {
+	return len(o) > 0
+}
diff --git a/vendor/xorm.io/builder/doc.go b/vendor/xorm.io/builder/doc.go
new file mode 100644
index 0000000000..162b150f10
--- /dev/null
+++ b/vendor/xorm.io/builder/doc.go
@@ -0,0 +1,120 @@
+// Copyright 2016 The XORM Authors. All rights reserved.
+// Use of this source code is governed by a BSD
+// license that can be found in the LICENSE file.
+
+/*
+
+Package builder is a simple and powerful sql builder for Go.
+
+Make sure you have installed Go 1.1+ and then:
+
+    go get github.com/go-xorm/builder
+
+WARNNING: Currently, only query conditions are supported. Below is the supported conditions.
+
+1. Eq is a redefine of a map, you can give one or more conditions to Eq
+
+    import . "github.com/go-xorm/builder"
+
+    sql, args, _ := ToSQL(Eq{"a":1})
+    // a=? [1]
+    sql, args, _ := ToSQL(Eq{"b":"c"}.And(Eq{"c": 0}))
+    // b=? AND c=? ["c", 0]
+    sql, args, _ := ToSQL(Eq{"b":"c", "c":0})
+    // b=? AND c=? ["c", 0]
+    sql, args, _ := ToSQL(Eq{"b":"c"}.Or(Eq{"b":"d"}))
+    // b=? OR b=? ["c", "d"]
+    sql, args, _ := ToSQL(Eq{"b": []string{"c", "d"}})
+    // b IN (?,?) ["c", "d"]
+    sql, args, _ := ToSQL(Eq{"b": 1, "c":[]int{2, 3}})
+    // b=? AND c IN (?,?) [1, 2, 3]
+
+2. Neq is the same to Eq
+
+    import . "github.com/go-xorm/builder"
+
+    sql, args, _ := ToSQL(Neq{"a":1})
+    // a<>? [1]
+    sql, args, _ := ToSQL(Neq{"b":"c"}.And(Neq{"c": 0}))
+    // b<>? AND c<>? ["c", 0]
+    sql, args, _ := ToSQL(Neq{"b":"c", "c":0})
+    // b<>? AND c<>? ["c", 0]
+    sql, args, _ := ToSQL(Neq{"b":"c"}.Or(Neq{"b":"d"}))
+    // b<>? OR b<>? ["c", "d"]
+    sql, args, _ := ToSQL(Neq{"b": []string{"c", "d"}})
+    // b NOT IN (?,?) ["c", "d"]
+    sql, args, _ := ToSQL(Neq{"b": 1, "c":[]int{2, 3}})
+    // b<>? AND c NOT IN (?,?) [1, 2, 3]
+
+3. Gt, Gte, Lt, Lte
+
+    import . "github.com/go-xorm/builder"
+
+    sql, args, _ := ToSQL(Gt{"a", 1}.And(Gte{"b", 2}))
+    // a>? AND b>=? [1, 2]
+    sql, args, _ := ToSQL(Lt{"a", 1}.Or(Lte{"b", 2}))
+    // a<? OR b<=? [1, 2]
+
+4. Like
+
+    import . "github.com/go-xorm/builder"
+
+    sql, args, _ := ToSQL(Like{"a", "c"})
+    // a LIKE ? [%c%]
+
+5. Expr you can customerize your sql with Expr
+
+    import . "github.com/go-xorm/builder"
+
+    sql, args, _ := ToSQL(Expr("a = ? ", 1))
+    // a = ? [1]
+    sql, args, _ := ToSQL(Eq{"a": Expr("select id from table where c = ?", 1)})
+    // a=(select id from table where c = ?) [1]
+
+6. In and NotIn
+
+    import . "github.com/go-xorm/builder"
+
+    sql, args, _ := ToSQL(In("a", 1, 2, 3))
+    // a IN (?,?,?) [1,2,3]
+    sql, args, _ := ToSQL(In("a", []int{1, 2, 3}))
+    // a IN (?,?,?) [1,2,3]
+    sql, args, _ := ToSQL(In("a", Expr("select id from b where c = ?", 1))))
+    // a IN (select id from b where c = ?) [1]
+
+7. IsNull and NotNull
+
+    import . "github.com/go-xorm/builder"
+
+    sql, args, _ := ToSQL(IsNull{"a"})
+    // a IS NULL []
+    sql, args, _ := ToSQL(NotNull{"b"})
+     // b IS NOT NULL []
+
+8. And(conds ...Cond), And can connect one or more condtions via AND
+
+    import . "github.com/go-xorm/builder"
+
+    sql, args, _ := ToSQL(And(Eq{"a":1}, Like{"b", "c"}, Neq{"d", 2}))
+    // a=? AND b LIKE ? AND d<>? [1, %c%, 2]
+
+9. Or(conds ...Cond), Or can connect one or more conditions via Or
+
+    import . "github.com/go-xorm/builder"
+
+    sql, args, _ := ToSQL(Or(Eq{"a":1}, Like{"b", "c"}, Neq{"d", 2}))
+    // a=? OR b LIKE ? OR d<>? [1, %c%, 2]
+    sql, args, _ := ToSQL(Or(Eq{"a":1}, And(Like{"b", "c"}, Neq{"d", 2})))
+    // a=? OR (b LIKE ? AND d<>?) [1, %c%, 2]
+
+10. Between
+
+    import . "github.com/go-xorm/builder"
+
+    sql, args, _ := ToSQL(Between("a", 1, 2))
+    // a BETWEEN 1 AND 2
+
+11. define yourself conditions
+Since Cond is a interface, you can define yourself conditions and compare with them
+*/
+package builder
diff --git a/vendor/xorm.io/builder/error.go b/vendor/xorm.io/builder/error.go
new file mode 100644
index 0000000000..d830ee9955
--- /dev/null
+++ b/vendor/xorm.io/builder/error.go
@@ -0,0 +1,40 @@
+// Copyright 2016 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import "errors"
+
+var (
+	// ErrNotSupportType not supported SQL type error
+	ErrNotSupportType = errors.New("Not supported SQL type")
+	// ErrNoNotInConditions no NOT IN params error
+	ErrNoNotInConditions = errors.New("No NOT IN conditions")
+	// ErrNoInConditions no IN params error
+	ErrNoInConditions = errors.New("No IN conditions")
+	// ErrNeedMoreArguments need more arguments
+	ErrNeedMoreArguments = errors.New("Need more sql arguments")
+	// ErrNoTableName no table name
+	ErrNoTableName = errors.New("No table indicated")
+	// ErrNoColumnToInsert no column to update
+	ErrNoColumnToUpdate = errors.New("No column(s) to update")
+	// ErrNoColumnToInsert no column to update
+	ErrNoColumnToInsert = errors.New("No column(s) to insert")
+	// ErrNotSupportDialectType not supported dialect type error
+	ErrNotSupportDialectType = errors.New("Not supported dialect type")
+	// ErrNotUnexpectedUnionConditions using union in a wrong way
+	ErrNotUnexpectedUnionConditions = errors.New("Unexpected conditional fields in UNION query")
+	// ErrUnsupportedUnionMembers unexpected members in UNION query
+	ErrUnsupportedUnionMembers = errors.New("Unexpected members in UNION query")
+	// ErrUnexpectedSubQuery Unexpected sub-query in SELECT query
+	ErrUnexpectedSubQuery = errors.New("Unexpected sub-query in SELECT query")
+	// ErrDialectNotSetUp dialect is not setup yet
+	ErrDialectNotSetUp = errors.New("Dialect is not setup yet, try to use `Dialect(dbType)` at first")
+	// ErrInvalidLimitation offset or limit is not correct
+	ErrInvalidLimitation = errors.New("Offset or limit is not correct")
+	// ErrUnnamedDerivedTable Every derived table must have its own alias
+	ErrUnnamedDerivedTable = errors.New("Every derived table must have its own alias")
+	// ErrInconsistentDialect Inconsistent dialect in same builder
+	ErrInconsistentDialect = errors.New("Inconsistent dialect in same builder")
+)
diff --git a/vendor/xorm.io/builder/go.mod b/vendor/xorm.io/builder/go.mod
new file mode 100644
index 0000000000..35e43b329f
--- /dev/null
+++ b/vendor/xorm.io/builder/go.mod
@@ -0,0 +1,6 @@
+module xorm.io/builder
+
+require (
+	github.com/go-xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a
+	github.com/stretchr/testify v1.3.0
+)
diff --git a/vendor/xorm.io/builder/go.sum b/vendor/xorm.io/builder/go.sum
new file mode 100644
index 0000000000..468ba4a2d5
--- /dev/null
+++ b/vendor/xorm.io/builder/go.sum
@@ -0,0 +1,9 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/go-xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a h1:9wScpmSP5A3Bk8V3XHWUcJmYTh+ZnlHVyc+A4oZYS3Y=
+github.com/go-xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a/go.mod h1:56xuuqnHyryaerycW3BfssRdxQstACi0Epw/yC5E2xM=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
diff --git a/vendor/xorm.io/builder/sql.go b/vendor/xorm.io/builder/sql.go
new file mode 100644
index 0000000000..0834242768
--- /dev/null
+++ b/vendor/xorm.io/builder/sql.go
@@ -0,0 +1,156 @@
+// Copyright 2018 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import (
+	sql2 "database/sql"
+	"fmt"
+	"reflect"
+	"time"
+)
+
+func condToSQL(cond Cond) (string, []interface{}, error) {
+	if cond == nil || !cond.IsValid() {
+		return "", nil, nil
+	}
+
+	w := NewWriter()
+	if err := cond.WriteTo(w); err != nil {
+		return "", nil, err
+	}
+	return w.writer.String(), w.args, nil
+}
+
+func condToBoundSQL(cond Cond) (string, error) {
+	if cond == nil || !cond.IsValid() {
+		return "", nil
+	}
+
+	w := NewWriter()
+	if err := cond.WriteTo(w); err != nil {
+		return "", err
+	}
+	return ConvertToBoundSQL(w.writer.String(), w.args)
+}
+
+// ToSQL convert a builder or conditions to SQL and args
+func ToSQL(cond interface{}) (string, []interface{}, error) {
+	switch cond.(type) {
+	case Cond:
+		return condToSQL(cond.(Cond))
+	case *Builder:
+		return cond.(*Builder).ToSQL()
+	}
+	return "", nil, ErrNotSupportType
+}
+
+// ToBoundSQL convert a builder or conditions to parameters bound SQL
+func ToBoundSQL(cond interface{}) (string, error) {
+	switch cond.(type) {
+	case Cond:
+		return condToBoundSQL(cond.(Cond))
+	case *Builder:
+		return cond.(*Builder).ToBoundSQL()
+	}
+	return "", ErrNotSupportType
+}
+
+func noSQLQuoteNeeded(a interface{}) bool {
+	switch a.(type) {
+	case int, int8, int16, int32, int64:
+		return true
+	case uint, uint8, uint16, uint32, uint64:
+		return true
+	case float32, float64:
+		return true
+	case bool:
+		return true
+	case string:
+		return false
+	case time.Time, *time.Time:
+		return false
+	}
+
+	t := reflect.TypeOf(a)
+	switch t.Kind() {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return true
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		return true
+	case reflect.Float32, reflect.Float64:
+		return true
+	case reflect.Bool:
+		return true
+	case reflect.String:
+		return false
+	}
+
+	return false
+}
+
+// ConvertToBoundSQL will convert SQL and args to a bound SQL
+func ConvertToBoundSQL(sql string, args []interface{}) (string, error) {
+	buf := StringBuilder{}
+	var i, j, start int
+	for ; i < len(sql); i++ {
+		if sql[i] == '?' {
+			_, err := buf.WriteString(sql[start:i])
+			if err != nil {
+				return "", err
+			}
+			start = i + 1
+
+			if len(args) == j {
+				return "", ErrNeedMoreArguments
+			}
+
+			arg := args[j]
+			if namedArg, ok := arg.(sql2.NamedArg); ok {
+				arg = namedArg.Value
+			}
+
+			if noSQLQuoteNeeded(arg) {
+				_, err = fmt.Fprint(&buf, arg)
+			} else {
+				_, err = fmt.Fprintf(&buf, "'%v'", arg)
+			}
+			if err != nil {
+				return "", err
+			}
+			j = j + 1
+		}
+	}
+	_, err := buf.WriteString(sql[start:])
+	if err != nil {
+		return "", err
+	}
+	return buf.String(), nil
+}
+
+// ConvertPlaceholder replaces ? to $1, $2 ... or :1, :2 ... according prefix
+func ConvertPlaceholder(sql, prefix string) (string, error) {
+	buf := StringBuilder{}
+	var i, j, start int
+	for ; i < len(sql); i++ {
+		if sql[i] == '?' {
+			if _, err := buf.WriteString(sql[start:i]); err != nil {
+				return "", err
+			}
+
+			start = i + 1
+			j = j + 1
+
+			if _, err := buf.WriteString(fmt.Sprintf("%v%d", prefix, j)); err != nil {
+				return "", err
+			}
+		}
+	}
+
+	if _, err := buf.WriteString(sql[start:]); err != nil {
+		return "", err
+	}
+
+	return buf.String(), nil
+}
diff --git a/vendor/xorm.io/builder/string_builder.go b/vendor/xorm.io/builder/string_builder.go
new file mode 100644
index 0000000000..d4de8717e7
--- /dev/null
+++ b/vendor/xorm.io/builder/string_builder.go
@@ -0,0 +1,119 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package builder
+
+import (
+	"unicode/utf8"
+	"unsafe"
+)
+
+// A StringBuilder is used to efficiently build a string using Write methods.
+// It minimizes memory copying. The zero value is ready to use.
+// Do not copy a non-zero Builder.
+type StringBuilder struct {
+	addr *StringBuilder // of receiver, to detect copies by value
+	buf  []byte
+}
+
+// noescape hides a pointer from escape analysis.  noescape is
+// the identity function but escape analysis doesn't think the
+// output depends on the input. noescape is inlined and currently
+// compiles down to zero instructions.
+// USE CAREFULLY!
+// This was copied from the runtime; see issues 23382 and 7921.
+//go:nosplit
+func noescape(p unsafe.Pointer) unsafe.Pointer {
+	x := uintptr(p)
+	return unsafe.Pointer(x ^ 0)
+}
+
+func (b *StringBuilder) copyCheck() {
+	if b.addr == nil {
+		// This hack works around a failing of Go's escape analysis
+		// that was causing b to escape and be heap allocated.
+		// See issue 23382.
+		// TODO: once issue 7921 is fixed, this should be reverted to
+		// just "b.addr = b".
+		b.addr = (*StringBuilder)(noescape(unsafe.Pointer(b)))
+	} else if b.addr != b {
+		panic("strings: illegal use of non-zero Builder copied by value")
+	}
+}
+
+// String returns the accumulated string.
+func (b *StringBuilder) String() string {
+	return *(*string)(unsafe.Pointer(&b.buf))
+}
+
+// Len returns the number of accumulated bytes; b.Len() == len(b.String()).
+func (b *StringBuilder) Len() int { return len(b.buf) }
+
+// Reset resets the Builder to be empty.
+func (b *StringBuilder) Reset() {
+	b.addr = nil
+	b.buf = nil
+}
+
+// grow copies the buffer to a new, larger buffer so that there are at least n
+// bytes of capacity beyond len(b.buf).
+func (b *StringBuilder) grow(n int) {
+	buf := make([]byte, len(b.buf), 2*cap(b.buf)+n)
+	copy(buf, b.buf)
+	b.buf = buf
+}
+
+// Grow grows b's capacity, if necessary, to guarantee space for
+// another n bytes. After Grow(n), at least n bytes can be written to b
+// without another allocation. If n is negative, Grow panics.
+func (b *StringBuilder) Grow(n int) {
+	b.copyCheck()
+	if n < 0 {
+		panic("strings.Builder.Grow: negative count")
+	}
+	if cap(b.buf)-len(b.buf) < n {
+		b.grow(n)
+	}
+}
+
+// Write appends the contents of p to b's buffer.
+// Write always returns len(p), nil.
+func (b *StringBuilder) Write(p []byte) (int, error) {
+	b.copyCheck()
+	b.buf = append(b.buf, p...)
+	return len(p), nil
+}
+
+// WriteByte appends the byte c to b's buffer.
+// The returned error is always nil.
+func (b *StringBuilder) WriteByte(c byte) error {
+	b.copyCheck()
+	b.buf = append(b.buf, c)
+	return nil
+}
+
+// WriteRune appends the UTF-8 encoding of Unicode code point r to b's buffer.
+// It returns the length of r and a nil error.
+func (b *StringBuilder) WriteRune(r rune) (int, error) {
+	b.copyCheck()
+	if r < utf8.RuneSelf {
+		b.buf = append(b.buf, byte(r))
+		return 1, nil
+	}
+	l := len(b.buf)
+	if cap(b.buf)-l < utf8.UTFMax {
+		b.grow(utf8.UTFMax)
+	}
+	n := utf8.EncodeRune(b.buf[l:l+utf8.UTFMax], r)
+	b.buf = b.buf[:l+n]
+	return n, nil
+}
+
+// WriteString appends the contents of s to b's buffer.
+// It returns the length of s and a nil error.
+func (b *StringBuilder) WriteString(s string) (int, error) {
+	b.copyCheck()
+	b.buf = append(b.buf, s...)
+	return len(s), nil
+}
diff --git a/vendor/xorm.io/core/.gitignore b/vendor/xorm.io/core/.gitignore
new file mode 100644
index 0000000000..98e6ef67fa
--- /dev/null
+++ b/vendor/xorm.io/core/.gitignore
@@ -0,0 +1 @@
+*.db
diff --git a/vendor/xorm.io/core/LICENSE b/vendor/xorm.io/core/LICENSE
new file mode 100644
index 0000000000..1130797806
--- /dev/null
+++ b/vendor/xorm.io/core/LICENSE
@@ -0,0 +1,27 @@
+Copyright (c) 2013 - 2015 Lunny Xiao <xiaolunwen@gmail.com>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+* Neither the name of the {organization} nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/xorm.io/core/README.md b/vendor/xorm.io/core/README.md
new file mode 100644
index 0000000000..09b72c74b3
--- /dev/null
+++ b/vendor/xorm.io/core/README.md
@@ -0,0 +1,116 @@
+Core is a lightweight wrapper of sql.DB.
+
+[![CircleCI](https://circleci.com/gh/go-xorm/core/tree/master.svg?style=svg)](https://circleci.com/gh/go-xorm/core/tree/master)
+
+# Open
+```Go
+db, _ := core.Open(db, connstr)
+```
+
+# SetMapper
+```Go
+db.SetMapper(SameMapper())
+```
+
+## Scan usage
+
+### Scan
+```Go
+rows, _ := db.Query()
+for rows.Next() {
+    rows.Scan()
+}
+```
+
+### ScanMap
+```Go
+rows, _ := db.Query()
+for rows.Next() {
+    rows.ScanMap()
+```
+
+### ScanSlice
+
+You can use `[]string`, `[][]byte`, `[]interface{}`, `[]*string`, `[]sql.NullString` to ScanSclice. Notice, slice's length should be equal or less than select columns.
+
+```Go
+rows, _ := db.Query()
+cols, _ := rows.Columns()
+for rows.Next() {
+    var s = make([]string, len(cols))
+    rows.ScanSlice(&s)
+}
+```
+
+```Go
+rows, _ := db.Query()
+cols, _ := rows.Columns()
+for rows.Next() {
+    var s = make([]*string, len(cols))
+    rows.ScanSlice(&s)
+}
+```
+
+### ScanStruct
+```Go
+rows, _ := db.Query()
+for rows.Next() {
+    rows.ScanStructByName()
+    rows.ScanStructByIndex()
+}
+```
+
+## Query usage
+```Go
+rows, err := db.Query("select * from table where name = ?", name)
+
+user = User{
+    Name:"lunny",
+}
+rows, err := db.QueryStruct("select * from table where name = ?Name",
+            &user)
+
+var user = map[string]interface{}{
+    "name": "lunny",
+}
+rows, err = db.QueryMap("select * from table where name = ?name",
+            &user)
+```
+
+## QueryRow usage
+```Go
+row := db.QueryRow("select * from table where name = ?", name)
+
+user = User{
+    Name:"lunny",
+}
+row := db.QueryRowStruct("select * from table where name = ?Name",
+            &user)
+
+var user = map[string]interface{}{
+    "name": "lunny",
+}
+row = db.QueryRowMap("select * from table where name = ?name",
+            &user)
+```
+
+## Exec usage
+```Go
+db.Exec("insert into user (`name`, title, age, alias, nick_name,created) values (?,?,?,?,?,?)", name, title, age, alias...)
+
+user = User{
+    Name:"lunny",
+    Title:"test",
+    Age: 18,
+}
+result, err = db.ExecStruct("insert into user (`name`, title, age, alias, nick_name,created) values (?Name,?Title,?Age,?Alias,?NickName,?Created)",
+            &user)
+
+var user = map[string]interface{}{
+    "Name": "lunny",
+    "Title": "test",
+    "Age": 18,
+}
+result, err = db.ExecMap("insert into user (`name`, title, age, alias, nick_name,created) values (?Name,?Title,?Age,?Alias,?NickName,?Created)",
+            &user)
+```
\ No newline at end of file
diff --git a/vendor/xorm.io/core/benchmark.sh b/vendor/xorm.io/core/benchmark.sh
new file mode 100644
index 0000000000..eab9e57e9f
--- /dev/null
+++ b/vendor/xorm.io/core/benchmark.sh
@@ -0,0 +1 @@
+go test -v -bench=. -run=XXX
diff --git a/vendor/xorm.io/core/cache.go b/vendor/xorm.io/core/cache.go
new file mode 100644
index 0000000000..dc4992dfb1
--- /dev/null
+++ b/vendor/xorm.io/core/cache.go
@@ -0,0 +1,91 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import (
+	"bytes"
+	"encoding/gob"
+	"errors"
+	"fmt"
+	"strings"
+	"time"
+)
+
+const (
+	// default cache expired time
+	CacheExpired = 60 * time.Minute
+	// not use now
+	CacheMaxMemory = 256
+	// evey ten minutes to clear all expired nodes
+	CacheGcInterval = 10 * time.Minute
+	// each time when gc to removed max nodes
+	CacheGcMaxRemoved = 20
+)
+
+var (
+	ErrCacheMiss = errors.New("xorm/cache: key not found.")
+	ErrNotStored = errors.New("xorm/cache: not stored.")
+)
+
+// CacheStore is a interface to store cache
+type CacheStore interface {
+	// key is primary key or composite primary key
+	// value is struct's pointer
+	// key format : <tablename>-p-<pk1>-<pk2>...
+	Put(key string, value interface{}) error
+	Get(key string) (interface{}, error)
+	Del(key string) error
+}
+
+// Cacher is an interface to provide cache
+// id format : u-<pk1>-<pk2>...
+type Cacher interface {
+	GetIds(tableName, sql string) interface{}
+	GetBean(tableName string, id string) interface{}
+	PutIds(tableName, sql string, ids interface{})
+	PutBean(tableName string, id string, obj interface{})
+	DelIds(tableName, sql string)
+	DelBean(tableName string, id string)
+	ClearIds(tableName string)
+	ClearBeans(tableName string)
+}
+
+func encodeIds(ids []PK) (string, error) {
+	buf := new(bytes.Buffer)
+	enc := gob.NewEncoder(buf)
+	err := enc.Encode(ids)
+
+	return buf.String(), err
+}
+
+func decodeIds(s string) ([]PK, error) {
+	pks := make([]PK, 0)
+
+	dec := gob.NewDecoder(strings.NewReader(s))
+	err := dec.Decode(&pks)
+
+	return pks, err
+}
+
+func GetCacheSql(m Cacher, tableName, sql string, args interface{}) ([]PK, error) {
+	bytes := m.GetIds(tableName, GenSqlKey(sql, args))
+	if bytes == nil {
+		return nil, errors.New("Not Exist")
+	}
+	return decodeIds(bytes.(string))
+}
+
+func PutCacheSql(m Cacher, ids []PK, tableName, sql string, args interface{}) error {
+	bytes, err := encodeIds(ids)
+	if err != nil {
+		return err
+	}
+	m.PutIds(tableName, GenSqlKey(sql, args), bytes)
+	return nil
+}
+
+func GenSqlKey(sql string, args interface{}) string {
+	return fmt.Sprintf("%v-%v", sql, args)
+}
diff --git a/vendor/xorm.io/core/column.go b/vendor/xorm.io/core/column.go
new file mode 100644
index 0000000000..40d8f9268d
--- /dev/null
+++ b/vendor/xorm.io/core/column.go
@@ -0,0 +1,166 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+	"time"
+)
+
+const (
+	TWOSIDES = iota + 1
+	ONLYTODB
+	ONLYFROMDB
+)
+
+// Column defines database column
+type Column struct {
+	Name            string
+	TableName       string
+	FieldName       string
+	SQLType         SQLType
+	IsJSON          bool
+	Length          int
+	Length2         int
+	Nullable        bool
+	Default         string
+	Indexes         map[string]int
+	IsPrimaryKey    bool
+	IsAutoIncrement bool
+	MapType         int
+	IsCreated       bool
+	IsUpdated       bool
+	IsDeleted       bool
+	IsCascade       bool
+	IsVersion       bool
+	DefaultIsEmpty  bool
+	EnumOptions     map[string]int
+	SetOptions      map[string]int
+	DisableTimeZone bool
+	TimeZone        *time.Location // column specified time zone
+	Comment         string
+}
+
+// NewColumn creates a new column
+func NewColumn(name, fieldName string, sqlType SQLType, len1, len2 int, nullable bool) *Column {
+	return &Column{
+		Name:            name,
+		TableName:       "",
+		FieldName:       fieldName,
+		SQLType:         sqlType,
+		Length:          len1,
+		Length2:         len2,
+		Nullable:        nullable,
+		Default:         "",
+		Indexes:         make(map[string]int),
+		IsPrimaryKey:    false,
+		IsAutoIncrement: false,
+		MapType:         TWOSIDES,
+		IsCreated:       false,
+		IsUpdated:       false,
+		IsDeleted:       false,
+		IsCascade:       false,
+		IsVersion:       false,
+		DefaultIsEmpty:  false,
+		EnumOptions:     make(map[string]int),
+		Comment:         "",
+	}
+}
+
+// String generate column description string according dialect
+func (col *Column) String(d Dialect) string {
+	sql := d.QuoteStr() + col.Name + d.QuoteStr() + " "
+
+	sql += d.SqlType(col) + " "
+
+	if col.IsPrimaryKey {
+		sql += "PRIMARY KEY "
+		if col.IsAutoIncrement {
+			sql += d.AutoIncrStr() + " "
+		}
+	}
+
+	if col.Default != "" {
+		sql += "DEFAULT " + col.Default + " "
+	}
+
+	if d.ShowCreateNull() {
+		if col.Nullable {
+			sql += "NULL "
+		} else {
+			sql += "NOT NULL "
+		}
+	}
+
+	return sql
+}
+
+// StringNoPk generate column description string according dialect without primary keys
+func (col *Column) StringNoPk(d Dialect) string {
+	sql := d.QuoteStr() + col.Name + d.QuoteStr() + " "
+
+	sql += d.SqlType(col) + " "
+
+	if col.Default != "" {
+		sql += "DEFAULT " + col.Default + " "
+	}
+
+	if d.ShowCreateNull() {
+		if col.Nullable {
+			sql += "NULL "
+		} else {
+			sql += "NOT NULL "
+		}
+	}
+
+	return sql
+}
+
+// ValueOf returns column's filed of struct's value
+func (col *Column) ValueOf(bean interface{}) (*reflect.Value, error) {
+	dataStruct := reflect.Indirect(reflect.ValueOf(bean))
+	return col.ValueOfV(&dataStruct)
+}
+
+// ValueOfV returns column's filed of struct's value accept reflevt value
+func (col *Column) ValueOfV(dataStruct *reflect.Value) (*reflect.Value, error) {
+	var fieldValue reflect.Value
+	fieldPath := strings.Split(col.FieldName, ".")
+
+	if dataStruct.Type().Kind() == reflect.Map {
+		keyValue := reflect.ValueOf(fieldPath[len(fieldPath)-1])
+		fieldValue = dataStruct.MapIndex(keyValue)
+		return &fieldValue, nil
+	} else if dataStruct.Type().Kind() == reflect.Interface {
+		structValue := reflect.ValueOf(dataStruct.Interface())
+		dataStruct = &structValue
+	}
+
+	level := len(fieldPath)
+	fieldValue = dataStruct.FieldByName(fieldPath[0])
+	for i := 0; i < level-1; i++ {
+		if !fieldValue.IsValid() {
+			break
+		}
+		if fieldValue.Kind() == reflect.Struct {
+			fieldValue = fieldValue.FieldByName(fieldPath[i+1])
+		} else if fieldValue.Kind() == reflect.Ptr {
+			if fieldValue.IsNil() {
+				fieldValue.Set(reflect.New(fieldValue.Type().Elem()))
+			}
+			fieldValue = fieldValue.Elem().FieldByName(fieldPath[i+1])
+		} else {
+			return nil, fmt.Errorf("field %v is not valid", col.FieldName)
+		}
+	}
+
+	if !fieldValue.IsValid() {
+		return nil, fmt.Errorf("field %v is not valid", col.FieldName)
+	}
+
+	return &fieldValue, nil
+}
diff --git a/vendor/xorm.io/core/converstion.go b/vendor/xorm.io/core/converstion.go
new file mode 100644
index 0000000000..9703c36e08
--- /dev/null
+++ b/vendor/xorm.io/core/converstion.go
@@ -0,0 +1,12 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+// Conversion is an interface. A type implements Conversion will according
+// the custom method to fill into database and retrieve from database.
+type Conversion interface {
+	FromDB([]byte) error
+	ToDB() ([]byte, error)
+}
diff --git a/vendor/xorm.io/core/db.go b/vendor/xorm.io/core/db.go
new file mode 100644
index 0000000000..3e50a14795
--- /dev/null
+++ b/vendor/xorm.io/core/db.go
@@ -0,0 +1,223 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import (
+	"context"
+	"database/sql"
+	"database/sql/driver"
+	"fmt"
+	"reflect"
+	"regexp"
+	"sync"
+)
+
+var (
+	DefaultCacheSize = 200
+)
+
+func MapToSlice(query string, mp interface{}) (string, []interface{}, error) {
+	vv := reflect.ValueOf(mp)
+	if vv.Kind() != reflect.Ptr || vv.Elem().Kind() != reflect.Map {
+		return "", []interface{}{}, ErrNoMapPointer
+	}
+
+	args := make([]interface{}, 0, len(vv.Elem().MapKeys()))
+	var err error
+	query = re.ReplaceAllStringFunc(query, func(src string) string {
+		v := vv.Elem().MapIndex(reflect.ValueOf(src[1:]))
+		if !v.IsValid() {
+			err = fmt.Errorf("map key %s is missing", src[1:])
+		} else {
+			args = append(args, v.Interface())
+		}
+		return "?"
+	})
+
+	return query, args, err
+}
+
+func StructToSlice(query string, st interface{}) (string, []interface{}, error) {
+	vv := reflect.ValueOf(st)
+	if vv.Kind() != reflect.Ptr || vv.Elem().Kind() != reflect.Struct {
+		return "", []interface{}{}, ErrNoStructPointer
+	}
+
+	args := make([]interface{}, 0)
+	var err error
+	query = re.ReplaceAllStringFunc(query, func(src string) string {
+		fv := vv.Elem().FieldByName(src[1:]).Interface()
+		if v, ok := fv.(driver.Valuer); ok {
+			var value driver.Value
+			value, err = v.Value()
+			if err != nil {
+				return "?"
+			}
+			args = append(args, value)
+		} else {
+			args = append(args, fv)
+		}
+		return "?"
+	})
+	if err != nil {
+		return "", []interface{}{}, err
+	}
+	return query, args, nil
+}
+
+type cacheStruct struct {
+	value reflect.Value
+	idx   int
+}
+
+// DB is a wrap of sql.DB with extra contents
+type DB struct {
+	*sql.DB
+	Mapper            IMapper
+	reflectCache      map[reflect.Type]*cacheStruct
+	reflectCacheMutex sync.RWMutex
+}
+
+// Open opens a database
+func Open(driverName, dataSourceName string) (*DB, error) {
+	db, err := sql.Open(driverName, dataSourceName)
+	if err != nil {
+		return nil, err
+	}
+	return &DB{
+		DB:           db,
+		Mapper:       NewCacheMapper(&SnakeMapper{}),
+		reflectCache: make(map[reflect.Type]*cacheStruct),
+	}, nil
+}
+
+// FromDB creates a DB from a sql.DB
+func FromDB(db *sql.DB) *DB {
+	return &DB{
+		DB:           db,
+		Mapper:       NewCacheMapper(&SnakeMapper{}),
+		reflectCache: make(map[reflect.Type]*cacheStruct),
+	}
+}
+
+func (db *DB) reflectNew(typ reflect.Type) reflect.Value {
+	db.reflectCacheMutex.Lock()
+	defer db.reflectCacheMutex.Unlock()
+	cs, ok := db.reflectCache[typ]
+	if !ok || cs.idx+1 > DefaultCacheSize-1 {
+		cs = &cacheStruct{reflect.MakeSlice(reflect.SliceOf(typ), DefaultCacheSize, DefaultCacheSize), 0}
+		db.reflectCache[typ] = cs
+	} else {
+		cs.idx = cs.idx + 1
+	}
+	return cs.value.Index(cs.idx).Addr()
+}
+
+// QueryContext overwrites sql.DB.QueryContext
+func (db *DB) QueryContext(ctx context.Context, query string, args ...interface{}) (*Rows, error) {
+	rows, err := db.DB.QueryContext(ctx, query, args...)
+	if err != nil {
+		if rows != nil {
+			rows.Close()
+		}
+		return nil, err
+	}
+	return &Rows{rows, db}, nil
+}
+
+// Query overwrites sql.DB.Query
+func (db *DB) Query(query string, args ...interface{}) (*Rows, error) {
+	return db.QueryContext(context.Background(), query, args...)
+}
+
+func (db *DB) QueryMapContext(ctx context.Context, query string, mp interface{}) (*Rows, error) {
+	query, args, err := MapToSlice(query, mp)
+	if err != nil {
+		return nil, err
+	}
+	return db.QueryContext(ctx, query, args...)
+}
+
+func (db *DB) QueryMap(query string, mp interface{}) (*Rows, error) {
+	return db.QueryMapContext(context.Background(), query, mp)
+}
+
+func (db *DB) QueryStructContext(ctx context.Context, query string, st interface{}) (*Rows, error) {
+	query, args, err := StructToSlice(query, st)
+	if err != nil {
+		return nil, err
+	}
+	return db.QueryContext(ctx, query, args...)
+}
+
+func (db *DB) QueryStruct(query string, st interface{}) (*Rows, error) {
+	return db.QueryStructContext(context.Background(), query, st)
+}
+
+func (db *DB) QueryRowContext(ctx context.Context, query string, args ...interface{}) *Row {
+	rows, err := db.QueryContext(ctx, query, args...)
+	if err != nil {
+		return &Row{nil, err}
+	}
+	return &Row{rows, nil}
+}
+
+func (db *DB) QueryRow(query string, args ...interface{}) *Row {
+	return db.QueryRowContext(context.Background(), query, args...)
+}
+
+func (db *DB) QueryRowMapContext(ctx context.Context, query string, mp interface{}) *Row {
+	query, args, err := MapToSlice(query, mp)
+	if err != nil {
+		return &Row{nil, err}
+	}
+	return db.QueryRowContext(ctx, query, args...)
+}
+
+func (db *DB) QueryRowMap(query string, mp interface{}) *Row {
+	return db.QueryRowMapContext(context.Background(), query, mp)
+}
+
+func (db *DB) QueryRowStructContext(ctx context.Context, query string, st interface{}) *Row {
+	query, args, err := StructToSlice(query, st)
+	if err != nil {
+		return &Row{nil, err}
+	}
+	return db.QueryRowContext(ctx, query, args...)
+}
+
+func (db *DB) QueryRowStruct(query string, st interface{}) *Row {
+	return db.QueryRowStructContext(context.Background(), query, st)
+}
+
+var (
+	re = regexp.MustCompile(`[?](\w+)`)
+)
+
+// insert into (name) values (?)
+// insert into (name) values (?name)
+func (db *DB) ExecMapContext(ctx context.Context, query string, mp interface{}) (sql.Result, error) {
+	query, args, err := MapToSlice(query, mp)
+	if err != nil {
+		return nil, err
+	}
+	return db.DB.ExecContext(ctx, query, args...)
+}
+
+func (db *DB) ExecMap(query string, mp interface{}) (sql.Result, error) {
+	return db.ExecMapContext(context.Background(), query, mp)
+}
+
+func (db *DB) ExecStructContext(ctx context.Context, query string, st interface{}) (sql.Result, error) {
+	query, args, err := StructToSlice(query, st)
+	if err != nil {
+		return nil, err
+	}
+	return db.DB.ExecContext(ctx, query, args...)
+}
+
+func (db *DB) ExecStruct(query string, st interface{}) (sql.Result, error) {
+	return db.ExecStructContext(context.Background(), query, st)
+}
diff --git a/vendor/xorm.io/core/dialect.go b/vendor/xorm.io/core/dialect.go
new file mode 100644
index 0000000000..5d35a4f11d
--- /dev/null
+++ b/vendor/xorm.io/core/dialect.go
@@ -0,0 +1,319 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import (
+	"fmt"
+	"strings"
+	"time"
+)
+
+type DbType string
+
+type Uri struct {
+	DbType  DbType
+	Proto   string
+	Host    string
+	Port    string
+	DbName  string
+	User    string
+	Passwd  string
+	Charset string
+	Laddr   string
+	Raddr   string
+	Timeout time.Duration
+	Schema  string
+}
+
+// a dialect is a driver's wrapper
+type Dialect interface {
+	SetLogger(logger ILogger)
+	Init(*DB, *Uri, string, string) error
+	URI() *Uri
+	DB() *DB
+	DBType() DbType
+	SqlType(*Column) string
+	FormatBytes(b []byte) string
+
+	DriverName() string
+	DataSourceName() string
+
+	QuoteStr() string
+	IsReserved(string) bool
+	Quote(string) string
+	AndStr() string
+	OrStr() string
+	EqStr() string
+	RollBackStr() string
+	AutoIncrStr() string
+
+	SupportInsertMany() bool
+	SupportEngine() bool
+	SupportCharset() bool
+	SupportDropIfExists() bool
+	IndexOnTable() bool
+	ShowCreateNull() bool
+
+	IndexCheckSql(tableName, idxName string) (string, []interface{})
+	TableCheckSql(tableName string) (string, []interface{})
+
+	IsColumnExist(tableName string, colName string) (bool, error)
+
+	CreateTableSql(table *Table, tableName, storeEngine, charset string) string
+	DropTableSql(tableName string) string
+	CreateIndexSql(tableName string, index *Index) string
+	DropIndexSql(tableName string, index *Index) string
+
+	ModifyColumnSql(tableName string, col *Column) string
+
+	ForUpdateSql(query string) string
+
+	//CreateTableIfNotExists(table *Table, tableName, storeEngine, charset string) error
+	//MustDropTable(tableName string) error
+
+	GetColumns(tableName string) ([]string, map[string]*Column, error)
+	GetTables() ([]*Table, error)
+	GetIndexes(tableName string) (map[string]*Index, error)
+
+	Filters() []Filter
+	SetParams(params map[string]string)
+}
+
+func OpenDialect(dialect Dialect) (*DB, error) {
+	return Open(dialect.DriverName(), dialect.DataSourceName())
+}
+
+type Base struct {
+	db             *DB
+	dialect        Dialect
+	driverName     string
+	dataSourceName string
+	logger         ILogger
+	*Uri
+}
+
+func (b *Base) DB() *DB {
+	return b.db
+}
+
+func (b *Base) SetLogger(logger ILogger) {
+	b.logger = logger
+}
+
+func (b *Base) Init(db *DB, dialect Dialect, uri *Uri, drivername, dataSourceName string) error {
+	b.db, b.dialect, b.Uri = db, dialect, uri
+	b.driverName, b.dataSourceName = drivername, dataSourceName
+	return nil
+}
+
+func (b *Base) URI() *Uri {
+	return b.Uri
+}
+
+func (b *Base) DBType() DbType {
+	return b.Uri.DbType
+}
+
+func (b *Base) FormatBytes(bs []byte) string {
+	return fmt.Sprintf("0x%x", bs)
+}
+
+func (b *Base) DriverName() string {
+	return b.driverName
+}
+
+func (b *Base) ShowCreateNull() bool {
+	return true
+}
+
+func (b *Base) DataSourceName() string {
+	return b.dataSourceName
+}
+
+func (b *Base) AndStr() string {
+	return "AND"
+}
+
+func (b *Base) OrStr() string {
+	return "OR"
+}
+
+func (b *Base) EqStr() string {
+	return "="
+}
+
+func (db *Base) RollBackStr() string {
+	return "ROLL BACK"
+}
+
+func (db *Base) SupportDropIfExists() bool {
+	return true
+}
+
+func (db *Base) DropTableSql(tableName string) string {
+	quote := db.dialect.Quote
+	return fmt.Sprintf("DROP TABLE IF EXISTS %s", quote(tableName))
+}
+
+func (db *Base) HasRecords(query string, args ...interface{}) (bool, error) {
+	db.LogSQL(query, args)
+	rows, err := db.DB().Query(query, args...)
+	if err != nil {
+		return false, err
+	}
+	defer rows.Close()
+
+	if rows.Next() {
+		return true, nil
+	}
+	return false, nil
+}
+
+func (db *Base) IsColumnExist(tableName, colName string) (bool, error) {
+	query := "SELECT `COLUMN_NAME` FROM `INFORMATION_SCHEMA`.`COLUMNS` WHERE `TABLE_SCHEMA` = ? AND `TABLE_NAME` = ? AND `COLUMN_NAME` = ?"
+	query = strings.Replace(query, "`", db.dialect.QuoteStr(), -1)
+	return db.HasRecords(query, db.DbName, tableName, colName)
+}
+
+/*
+func (db *Base) CreateTableIfNotExists(table *Table, tableName, storeEngine, charset string) error {
+	sql, args := db.dialect.TableCheckSql(tableName)
+	rows, err := db.DB().Query(sql, args...)
+	if db.Logger != nil {
+		db.Logger.Info("[sql]", sql, args)
+	}
+	if err != nil {
+		return err
+	}
+	defer rows.Close()
+
+	if rows.Next() {
+		return nil
+	}
+
+	sql = db.dialect.CreateTableSql(table, tableName, storeEngine, charset)
+	_, err = db.DB().Exec(sql)
+	if db.Logger != nil {
+		db.Logger.Info("[sql]", sql)
+	}
+	return err
+}*/
+
+func (db *Base) CreateIndexSql(tableName string, index *Index) string {
+	quote := db.dialect.Quote
+	var unique string
+	var idxName string
+	if index.Type == UniqueType {
+		unique = " UNIQUE"
+	}
+	idxName = index.XName(tableName)
+	return fmt.Sprintf("CREATE%s INDEX %v ON %v (%v)", unique,
+		quote(idxName), quote(tableName),
+		quote(strings.Join(index.Cols, quote(","))))
+}
+
+func (db *Base) DropIndexSql(tableName string, index *Index) string {
+	quote := db.dialect.Quote
+	var name string
+	if index.IsRegular {
+		name = index.XName(tableName)
+	} else {
+		name = index.Name
+	}
+	return fmt.Sprintf("DROP INDEX %v ON %s", quote(name), quote(tableName))
+}
+
+func (db *Base) ModifyColumnSql(tableName string, col *Column) string {
+	return fmt.Sprintf("alter table %s MODIFY COLUMN %s", tableName, col.StringNoPk(db.dialect))
+}
+
+func (b *Base) CreateTableSql(table *Table, tableName, storeEngine, charset string) string {
+	var sql string
+	sql = "CREATE TABLE IF NOT EXISTS "
+	if tableName == "" {
+		tableName = table.Name
+	}
+
+	sql += b.dialect.Quote(tableName)
+	sql += " ("
+
+	if len(table.ColumnsSeq()) > 0 {
+		pkList := table.PrimaryKeys
+
+		for _, colName := range table.ColumnsSeq() {
+			col := table.GetColumn(colName)
+			if col.IsPrimaryKey && len(pkList) == 1 {
+				sql += col.String(b.dialect)
+			} else {
+				sql += col.StringNoPk(b.dialect)
+			}
+			sql = strings.TrimSpace(sql)
+			if b.DriverName() == MYSQL && len(col.Comment) > 0 {
+				sql += " COMMENT '" + col.Comment + "'"
+			}
+			sql += ", "
+		}
+
+		if len(pkList) > 1 {
+			sql += "PRIMARY KEY ( "
+			sql += b.dialect.Quote(strings.Join(pkList, b.dialect.Quote(",")))
+			sql += " ), "
+		}
+
+		sql = sql[:len(sql)-2]
+	}
+	sql += ")"
+
+	if b.dialect.SupportEngine() && storeEngine != "" {
+		sql += " ENGINE=" + storeEngine
+	}
+	if b.dialect.SupportCharset() {
+		if len(charset) == 0 {
+			charset = b.dialect.URI().Charset
+		}
+		if len(charset) > 0 {
+			sql += " DEFAULT CHARSET " + charset
+		}
+	}
+
+	return sql
+}
+
+func (b *Base) ForUpdateSql(query string) string {
+	return query + " FOR UPDATE"
+}
+
+func (b *Base) LogSQL(sql string, args []interface{}) {
+	if b.logger != nil && b.logger.IsShowSQL() {
+		if len(args) > 0 {
+			b.logger.Infof("[SQL] %v %v", sql, args)
+		} else {
+			b.logger.Infof("[SQL] %v", sql)
+		}
+	}
+}
+
+func (b *Base) SetParams(params map[string]string) {
+}
+
+var (
+	dialects = map[string]func() Dialect{}
+)
+
+// RegisterDialect register database dialect
+func RegisterDialect(dbName DbType, dialectFunc func() Dialect) {
+	if dialectFunc == nil {
+		panic("core: Register dialect is nil")
+	}
+	dialects[strings.ToLower(string(dbName))] = dialectFunc // !nashtsai! allow override dialect
+}
+
+// QueryDialect query if registed database dialect
+func QueryDialect(dbName DbType) Dialect {
+	if d, ok := dialects[strings.ToLower(string(dbName))]; ok {
+		return d()
+	}
+	return nil
+}
diff --git a/vendor/xorm.io/core/driver.go b/vendor/xorm.io/core/driver.go
new file mode 100644
index 0000000000..ceef4ba618
--- /dev/null
+++ b/vendor/xorm.io/core/driver.go
@@ -0,0 +1,31 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+type Driver interface {
+	Parse(string, string) (*Uri, error)
+}
+
+var (
+	drivers = map[string]Driver{}
+)
+
+func RegisterDriver(driverName string, driver Driver) {
+	if driver == nil {
+		panic("core: Register driver is nil")
+	}
+	if _, dup := drivers[driverName]; dup {
+		panic("core: Register called twice for driver " + driverName)
+	}
+	drivers[driverName] = driver
+}
+
+func QueryDriver(driverName string) Driver {
+	return drivers[driverName]
+}
+
+func RegisteredDriverSize() int {
+	return len(drivers)
+}
diff --git a/vendor/xorm.io/core/error.go b/vendor/xorm.io/core/error.go
new file mode 100644
index 0000000000..63ea53e466
--- /dev/null
+++ b/vendor/xorm.io/core/error.go
@@ -0,0 +1,12 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import "errors"
+
+var (
+	ErrNoMapPointer    = errors.New("mp should be a map's pointer")
+	ErrNoStructPointer = errors.New("mp should be a struct's pointer")
+)
diff --git a/vendor/xorm.io/core/filter.go b/vendor/xorm.io/core/filter.go
new file mode 100644
index 0000000000..6aeed4244c
--- /dev/null
+++ b/vendor/xorm.io/core/filter.go
@@ -0,0 +1,68 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import (
+	"fmt"
+	"strings"
+)
+
+// Filter is an interface to filter SQL
+type Filter interface {
+	Do(sql string, dialect Dialect, table *Table) string
+}
+
+// QuoteFilter filter SQL replace ` to database's own quote character
+type QuoteFilter struct {
+}
+
+func (s *QuoteFilter) Do(sql string, dialect Dialect, table *Table) string {
+	return strings.Replace(sql, "`", dialect.QuoteStr(), -1)
+}
+
+// IdFilter filter SQL replace (id) to primary key column name
+type IdFilter struct {
+}
+
+type Quoter struct {
+	dialect Dialect
+}
+
+func NewQuoter(dialect Dialect) *Quoter {
+	return &Quoter{dialect}
+}
+
+func (q *Quoter) Quote(content string) string {
+	return q.dialect.QuoteStr() + content + q.dialect.QuoteStr()
+}
+
+func (i *IdFilter) Do(sql string, dialect Dialect, table *Table) string {
+	quoter := NewQuoter(dialect)
+	if table != nil && len(table.PrimaryKeys) == 1 {
+		sql = strings.Replace(sql, " `(id)` ", " "+quoter.Quote(table.PrimaryKeys[0])+" ", -1)
+		sql = strings.Replace(sql, " "+quoter.Quote("(id)")+" ", " "+quoter.Quote(table.PrimaryKeys[0])+" ", -1)
+		return strings.Replace(sql, " (id) ", " "+quoter.Quote(table.PrimaryKeys[0])+" ", -1)
+	}
+	return sql
+}
+
+// SeqFilter filter SQL replace ?, ? ... to $1, $2 ...
+type SeqFilter struct {
+	Prefix string
+	Start  int
+}
+
+func (s *SeqFilter) Do(sql string, dialect Dialect, table *Table) string {
+	segs := strings.Split(sql, "?")
+	size := len(segs)
+	res := ""
+	for i, c := range segs {
+		if i < size-1 {
+			res += c + fmt.Sprintf("%s%v", s.Prefix, i+s.Start)
+		}
+	}
+	res += segs[size-1]
+	return res
+}
diff --git a/vendor/xorm.io/core/go.mod b/vendor/xorm.io/core/go.mod
new file mode 100644
index 0000000000..2703545e69
--- /dev/null
+++ b/vendor/xorm.io/core/go.mod
@@ -0,0 +1,7 @@
+module xorm.io/core
+
+require (
+	github.com/go-sql-driver/mysql v1.4.1
+	github.com/mattn/go-sqlite3 v1.10.0
+	google.golang.org/appengine v1.4.0 // indirect
+)
diff --git a/vendor/xorm.io/core/go.sum b/vendor/xorm.io/core/go.sum
new file mode 100644
index 0000000000..8f20f8bc90
--- /dev/null
+++ b/vendor/xorm.io/core/go.sum
@@ -0,0 +1,9 @@
+github.com/go-sql-driver/mysql v1.4.1 h1:g24URVg0OFbNUTx9qqY1IRZ9D9z3iPyi5zKhQZpNwpA=
+github.com/go-sql-driver/mysql v1.4.1/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/mattn/go-sqlite3 v1.10.0 h1:jbhqpg7tQe4SupckyijYiy0mJJ/pRyHvXf7JdWK860o=
+github.com/mattn/go-sqlite3 v1.10.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
+golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+google.golang.org/appengine v1.4.0 h1:/wp5JvzpHIxhs/dumFmF7BXTf3Z+dd4uXta4kVyO508=
+google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
diff --git a/vendor/xorm.io/core/ilogger.go b/vendor/xorm.io/core/ilogger.go
new file mode 100644
index 0000000000..348ab88f4f
--- /dev/null
+++ b/vendor/xorm.io/core/ilogger.go
@@ -0,0 +1,35 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+type LogLevel int
+
+const (
+	// !nashtsai! following level also match syslog.Priority value
+	LOG_DEBUG LogLevel = iota
+	LOG_INFO
+	LOG_WARNING
+	LOG_ERR
+	LOG_OFF
+	LOG_UNKNOWN
+)
+
+// logger interface
+type ILogger interface {
+	Debug(v ...interface{})
+	Debugf(format string, v ...interface{})
+	Error(v ...interface{})
+	Errorf(format string, v ...interface{})
+	Info(v ...interface{})
+	Infof(format string, v ...interface{})
+	Warn(v ...interface{})
+	Warnf(format string, v ...interface{})
+
+	Level() LogLevel
+	SetLevel(l LogLevel)
+
+	ShowSQL(show ...bool)
+	IsShowSQL() bool
+}
diff --git a/vendor/xorm.io/core/index.go b/vendor/xorm.io/core/index.go
new file mode 100644
index 0000000000..ac97b68505
--- /dev/null
+++ b/vendor/xorm.io/core/index.go
@@ -0,0 +1,71 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import (
+	"fmt"
+	"strings"
+)
+
+const (
+	IndexType = iota + 1
+	UniqueType
+)
+
+// database index
+type Index struct {
+	IsRegular bool
+	Name      string
+	Type      int
+	Cols      []string
+}
+
+func (index *Index) XName(tableName string) string {
+	if !strings.HasPrefix(index.Name, "UQE_") &&
+		!strings.HasPrefix(index.Name, "IDX_") {
+		tableName = strings.Replace(tableName, `"`, "", -1)
+		tableName = strings.Replace(tableName, `.`, "_", -1)
+		if index.Type == UniqueType {
+			return fmt.Sprintf("UQE_%v_%v", tableName, index.Name)
+		}
+		return fmt.Sprintf("IDX_%v_%v", tableName, index.Name)
+	}
+	return index.Name
+}
+
+// add columns which will be composite index
+func (index *Index) AddColumn(cols ...string) {
+	for _, col := range cols {
+		index.Cols = append(index.Cols, col)
+	}
+}
+
+func (index *Index) Equal(dst *Index) bool {
+	if index.Type != dst.Type {
+		return false
+	}
+	if len(index.Cols) != len(dst.Cols) {
+		return false
+	}
+
+	for i := 0; i < len(index.Cols); i++ {
+		var found bool
+		for j := 0; j < len(dst.Cols); j++ {
+			if index.Cols[i] == dst.Cols[j] {
+				found = true
+				break
+			}
+		}
+		if !found {
+			return false
+		}
+	}
+	return true
+}
+
+// new an index
+func NewIndex(name string, indexType int) *Index {
+	return &Index{true, name, indexType, make([]string, 0)}
+}
diff --git a/vendor/xorm.io/core/mapper.go b/vendor/xorm.io/core/mapper.go
new file mode 100644
index 0000000000..ec44ea0db9
--- /dev/null
+++ b/vendor/xorm.io/core/mapper.go
@@ -0,0 +1,258 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import (
+	"strings"
+	"sync"
+)
+
+// name translation between struct, fields names and table, column names
+type IMapper interface {
+	Obj2Table(string) string
+	Table2Obj(string) string
+}
+
+type CacheMapper struct {
+	oriMapper      IMapper
+	obj2tableCache map[string]string
+	obj2tableMutex sync.RWMutex
+	table2objCache map[string]string
+	table2objMutex sync.RWMutex
+}
+
+func NewCacheMapper(mapper IMapper) *CacheMapper {
+	return &CacheMapper{oriMapper: mapper, obj2tableCache: make(map[string]string),
+		table2objCache: make(map[string]string),
+	}
+}
+
+func (m *CacheMapper) Obj2Table(o string) string {
+	m.obj2tableMutex.RLock()
+	t, ok := m.obj2tableCache[o]
+	m.obj2tableMutex.RUnlock()
+	if ok {
+		return t
+	}
+
+	t = m.oriMapper.Obj2Table(o)
+	m.obj2tableMutex.Lock()
+	m.obj2tableCache[o] = t
+	m.obj2tableMutex.Unlock()
+	return t
+}
+
+func (m *CacheMapper) Table2Obj(t string) string {
+	m.table2objMutex.RLock()
+	o, ok := m.table2objCache[t]
+	m.table2objMutex.RUnlock()
+	if ok {
+		return o
+	}
+
+	o = m.oriMapper.Table2Obj(t)
+	m.table2objMutex.Lock()
+	m.table2objCache[t] = o
+	m.table2objMutex.Unlock()
+	return o
+}
+
+// SameMapper implements IMapper and provides same name between struct and
+// database table
+type SameMapper struct {
+}
+
+func (m SameMapper) Obj2Table(o string) string {
+	return o
+}
+
+func (m SameMapper) Table2Obj(t string) string {
+	return t
+}
+
+// SnakeMapper implements IMapper and provides name transaltion between
+// struct and database table
+type SnakeMapper struct {
+}
+
+func snakeCasedName(name string) string {
+	newstr := make([]rune, 0)
+	for idx, chr := range name {
+		if isUpper := 'A' <= chr && chr <= 'Z'; isUpper {
+			if idx > 0 {
+				newstr = append(newstr, '_')
+			}
+			chr -= ('A' - 'a')
+		}
+		newstr = append(newstr, chr)
+	}
+
+	return string(newstr)
+}
+
+func (mapper SnakeMapper) Obj2Table(name string) string {
+	return snakeCasedName(name)
+}
+
+func titleCasedName(name string) string {
+	newstr := make([]rune, 0)
+	upNextChar := true
+
+	name = strings.ToLower(name)
+
+	for _, chr := range name {
+		switch {
+		case upNextChar:
+			upNextChar = false
+			if 'a' <= chr && chr <= 'z' {
+				chr -= ('a' - 'A')
+			}
+		case chr == '_':
+			upNextChar = true
+			continue
+		}
+
+		newstr = append(newstr, chr)
+	}
+
+	return string(newstr)
+}
+
+func (mapper SnakeMapper) Table2Obj(name string) string {
+	return titleCasedName(name)
+}
+
+// GonicMapper implements IMapper. It will consider initialisms when mapping names.
+// E.g. id -> ID, user -> User and to table names: UserID -> user_id, MyUID -> my_uid
+type GonicMapper map[string]bool
+
+func isASCIIUpper(r rune) bool {
+	return 'A' <= r && r <= 'Z'
+}
+
+func toASCIIUpper(r rune) rune {
+	if 'a' <= r && r <= 'z' {
+		r -= ('a' - 'A')
+	}
+	return r
+}
+
+func gonicCasedName(name string) string {
+	newstr := make([]rune, 0, len(name)+3)
+	for idx, chr := range name {
+		if isASCIIUpper(chr) && idx > 0 {
+			if !isASCIIUpper(newstr[len(newstr)-1]) {
+				newstr = append(newstr, '_')
+			}
+		}
+
+		if !isASCIIUpper(chr) && idx > 1 {
+			l := len(newstr)
+			if isASCIIUpper(newstr[l-1]) && isASCIIUpper(newstr[l-2]) {
+				newstr = append(newstr, newstr[l-1])
+				newstr[l-1] = '_'
+			}
+		}
+
+		newstr = append(newstr, chr)
+	}
+	return strings.ToLower(string(newstr))
+}
+
+func (mapper GonicMapper) Obj2Table(name string) string {
+	return gonicCasedName(name)
+}
+
+func (mapper GonicMapper) Table2Obj(name string) string {
+	newstr := make([]rune, 0)
+
+	name = strings.ToLower(name)
+	parts := strings.Split(name, "_")
+
+	for _, p := range parts {
+		_, isInitialism := mapper[strings.ToUpper(p)]
+		for i, r := range p {
+			if i == 0 || isInitialism {
+				r = toASCIIUpper(r)
+			}
+			newstr = append(newstr, r)
+		}
+	}
+
+	return string(newstr)
+}
+
+// A GonicMapper that contains a list of common initialisms taken from golang/lint
+var LintGonicMapper = GonicMapper{
+	"API":   true,
+	"ASCII": true,
+	"CPU":   true,
+	"CSS":   true,
+	"DNS":   true,
+	"EOF":   true,
+	"GUID":  true,
+	"HTML":  true,
+	"HTTP":  true,
+	"HTTPS": true,
+	"ID":    true,
+	"IP":    true,
+	"JSON":  true,
+	"LHS":   true,
+	"QPS":   true,
+	"RAM":   true,
+	"RHS":   true,
+	"RPC":   true,
+	"SLA":   true,
+	"SMTP":  true,
+	"SSH":   true,
+	"TLS":   true,
+	"TTL":   true,
+	"UI":    true,
+	"UID":   true,
+	"UUID":  true,
+	"URI":   true,
+	"URL":   true,
+	"UTF8":  true,
+	"VM":    true,
+	"XML":   true,
+	"XSRF":  true,
+	"XSS":   true,
+}
+
+// provide prefix table name support
+type PrefixMapper struct {
+	Mapper IMapper
+	Prefix string
+}
+
+func (mapper PrefixMapper) Obj2Table(name string) string {
+	return mapper.Prefix + mapper.Mapper.Obj2Table(name)
+}
+
+func (mapper PrefixMapper) Table2Obj(name string) string {
+	return mapper.Mapper.Table2Obj(name[len(mapper.Prefix):])
+}
+
+func NewPrefixMapper(mapper IMapper, prefix string) PrefixMapper {
+	return PrefixMapper{mapper, prefix}
+}
+
+// provide suffix table name support
+type SuffixMapper struct {
+	Mapper IMapper
+	Suffix string
+}
+
+func (mapper SuffixMapper) Obj2Table(name string) string {
+	return mapper.Mapper.Obj2Table(name) + mapper.Suffix
+}
+
+func (mapper SuffixMapper) Table2Obj(name string) string {
+	return mapper.Mapper.Table2Obj(name[:len(name)-len(mapper.Suffix)])
+}
+
+func NewSuffixMapper(mapper IMapper, suffix string) SuffixMapper {
+	return SuffixMapper{mapper, suffix}
+}
diff --git a/vendor/xorm.io/core/pk.go b/vendor/xorm.io/core/pk.go
new file mode 100644
index 0000000000..05a7672d86
--- /dev/null
+++ b/vendor/xorm.io/core/pk.go
@@ -0,0 +1,30 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import (
+	"bytes"
+	"encoding/gob"
+)
+
+type PK []interface{}
+
+func NewPK(pks ...interface{}) *PK {
+	p := PK(pks)
+	return &p
+}
+
+func (p *PK) ToString() (string, error) {
+	buf := new(bytes.Buffer)
+	enc := gob.NewEncoder(buf)
+	err := enc.Encode(*p)
+	return buf.String(), err
+}
+
+func (p *PK) FromString(content string) error {
+	dec := gob.NewDecoder(bytes.NewBufferString(content))
+	err := dec.Decode(p)
+	return err
+}
diff --git a/vendor/xorm.io/core/rows.go b/vendor/xorm.io/core/rows.go
new file mode 100644
index 0000000000..2b046d84cc
--- /dev/null
+++ b/vendor/xorm.io/core/rows.go
@@ -0,0 +1,338 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import (
+	"database/sql"
+	"errors"
+	"reflect"
+	"sync"
+)
+
+type Rows struct {
+	*sql.Rows
+	db *DB
+}
+
+func (rs *Rows) ToMapString() ([]map[string]string, error) {
+	cols, err := rs.Columns()
+	if err != nil {
+		return nil, err
+	}
+
+	var results = make([]map[string]string, 0, 10)
+	for rs.Next() {
+		var record = make(map[string]string, len(cols))
+		err = rs.ScanMap(&record)
+		if err != nil {
+			return nil, err
+		}
+		results = append(results, record)
+	}
+	return results, nil
+}
+
+// scan data to a struct's pointer according field index
+func (rs *Rows) ScanStructByIndex(dest ...interface{}) error {
+	if len(dest) == 0 {
+		return errors.New("at least one struct")
+	}
+
+	vvvs := make([]reflect.Value, len(dest))
+	for i, s := range dest {
+		vv := reflect.ValueOf(s)
+		if vv.Kind() != reflect.Ptr || vv.Elem().Kind() != reflect.Struct {
+			return errors.New("dest should be a struct's pointer")
+		}
+
+		vvvs[i] = vv.Elem()
+	}
+
+	cols, err := rs.Columns()
+	if err != nil {
+		return err
+	}
+	newDest := make([]interface{}, len(cols))
+
+	var i = 0
+	for _, vvv := range vvvs {
+		for j := 0; j < vvv.NumField(); j++ {
+			newDest[i] = vvv.Field(j).Addr().Interface()
+			i = i + 1
+		}
+	}
+
+	return rs.Rows.Scan(newDest...)
+}
+
+var (
+	fieldCache      = make(map[reflect.Type]map[string]int)
+	fieldCacheMutex sync.RWMutex
+)
+
+func fieldByName(v reflect.Value, name string) reflect.Value {
+	t := v.Type()
+	fieldCacheMutex.RLock()
+	cache, ok := fieldCache[t]
+	fieldCacheMutex.RUnlock()
+	if !ok {
+		cache = make(map[string]int)
+		for i := 0; i < v.NumField(); i++ {
+			cache[t.Field(i).Name] = i
+		}
+		fieldCacheMutex.Lock()
+		fieldCache[t] = cache
+		fieldCacheMutex.Unlock()
+	}
+
+	if i, ok := cache[name]; ok {
+		return v.Field(i)
+	}
+
+	return reflect.Zero(t)
+}
+
+// scan data to a struct's pointer according field name
+func (rs *Rows) ScanStructByName(dest interface{}) error {
+	vv := reflect.ValueOf(dest)
+	if vv.Kind() != reflect.Ptr || vv.Elem().Kind() != reflect.Struct {
+		return errors.New("dest should be a struct's pointer")
+	}
+
+	cols, err := rs.Columns()
+	if err != nil {
+		return err
+	}
+
+	newDest := make([]interface{}, len(cols))
+	var v EmptyScanner
+	for j, name := range cols {
+		f := fieldByName(vv.Elem(), rs.db.Mapper.Table2Obj(name))
+		if f.IsValid() {
+			newDest[j] = f.Addr().Interface()
+		} else {
+			newDest[j] = &v
+		}
+	}
+
+	return rs.Rows.Scan(newDest...)
+}
+
+// scan data to a slice's pointer, slice's length should equal to columns' number
+func (rs *Rows) ScanSlice(dest interface{}) error {
+	vv := reflect.ValueOf(dest)
+	if vv.Kind() != reflect.Ptr || vv.Elem().Kind() != reflect.Slice {
+		return errors.New("dest should be a slice's pointer")
+	}
+
+	vvv := vv.Elem()
+	cols, err := rs.Columns()
+	if err != nil {
+		return err
+	}
+
+	newDest := make([]interface{}, len(cols))
+
+	for j := 0; j < len(cols); j++ {
+		if j >= vvv.Len() {
+			newDest[j] = reflect.New(vvv.Type().Elem()).Interface()
+		} else {
+			newDest[j] = vvv.Index(j).Addr().Interface()
+		}
+	}
+
+	err = rs.Rows.Scan(newDest...)
+	if err != nil {
+		return err
+	}
+
+	srcLen := vvv.Len()
+	for i := srcLen; i < len(cols); i++ {
+		vvv = reflect.Append(vvv, reflect.ValueOf(newDest[i]).Elem())
+	}
+	return nil
+}
+
+// scan data to a map's pointer
+func (rs *Rows) ScanMap(dest interface{}) error {
+	vv := reflect.ValueOf(dest)
+	if vv.Kind() != reflect.Ptr || vv.Elem().Kind() != reflect.Map {
+		return errors.New("dest should be a map's pointer")
+	}
+
+	cols, err := rs.Columns()
+	if err != nil {
+		return err
+	}
+
+	newDest := make([]interface{}, len(cols))
+	vvv := vv.Elem()
+
+	for i, _ := range cols {
+		newDest[i] = rs.db.reflectNew(vvv.Type().Elem()).Interface()
+	}
+
+	err = rs.Rows.Scan(newDest...)
+	if err != nil {
+		return err
+	}
+
+	for i, name := range cols {
+		vname := reflect.ValueOf(name)
+		vvv.SetMapIndex(vname, reflect.ValueOf(newDest[i]).Elem())
+	}
+
+	return nil
+}
+
+type Row struct {
+	rows *Rows
+	// One of these two will be non-nil:
+	err error // deferred error for easy chaining
+}
+
+// ErrorRow return an error row
+func ErrorRow(err error) *Row {
+	return &Row{
+		err: err,
+	}
+}
+
+// NewRow from rows
+func NewRow(rows *Rows, err error) *Row {
+	return &Row{rows, err}
+}
+
+func (row *Row) Columns() ([]string, error) {
+	if row.err != nil {
+		return nil, row.err
+	}
+	return row.rows.Columns()
+}
+
+func (row *Row) Scan(dest ...interface{}) error {
+	if row.err != nil {
+		return row.err
+	}
+	defer row.rows.Close()
+
+	for _, dp := range dest {
+		if _, ok := dp.(*sql.RawBytes); ok {
+			return errors.New("sql: RawBytes isn't allowed on Row.Scan")
+		}
+	}
+
+	if !row.rows.Next() {
+		if err := row.rows.Err(); err != nil {
+			return err
+		}
+		return sql.ErrNoRows
+	}
+	err := row.rows.Scan(dest...)
+	if err != nil {
+		return err
+	}
+	// Make sure the query can be processed to completion with no errors.
+	return row.rows.Close()
+}
+
+func (row *Row) ScanStructByName(dest interface{}) error {
+	if row.err != nil {
+		return row.err
+	}
+	defer row.rows.Close()
+
+	if !row.rows.Next() {
+		if err := row.rows.Err(); err != nil {
+			return err
+		}
+		return sql.ErrNoRows
+	}
+	err := row.rows.ScanStructByName(dest)
+	if err != nil {
+		return err
+	}
+	// Make sure the query can be processed to completion with no errors.
+	return row.rows.Close()
+}
+
+func (row *Row) ScanStructByIndex(dest interface{}) error {
+	if row.err != nil {
+		return row.err
+	}
+	defer row.rows.Close()
+
+	if !row.rows.Next() {
+		if err := row.rows.Err(); err != nil {
+			return err
+		}
+		return sql.ErrNoRows
+	}
+	err := row.rows.ScanStructByIndex(dest)
+	if err != nil {
+		return err
+	}
+	// Make sure the query can be processed to completion with no errors.
+	return row.rows.Close()
+}
+
+// scan data to a slice's pointer, slice's length should equal to columns' number
+func (row *Row) ScanSlice(dest interface{}) error {
+	if row.err != nil {
+		return row.err
+	}
+	defer row.rows.Close()
+
+	if !row.rows.Next() {
+		if err := row.rows.Err(); err != nil {
+			return err
+		}
+		return sql.ErrNoRows
+	}
+	err := row.rows.ScanSlice(dest)
+	if err != nil {
+		return err
+	}
+
+	// Make sure the query can be processed to completion with no errors.
+	return row.rows.Close()
+}
+
+// scan data to a map's pointer
+func (row *Row) ScanMap(dest interface{}) error {
+	if row.err != nil {
+		return row.err
+	}
+	defer row.rows.Close()
+
+	if !row.rows.Next() {
+		if err := row.rows.Err(); err != nil {
+			return err
+		}
+		return sql.ErrNoRows
+	}
+	err := row.rows.ScanMap(dest)
+	if err != nil {
+		return err
+	}
+
+	// Make sure the query can be processed to completion with no errors.
+	return row.rows.Close()
+}
+
+func (row *Row) ToMapString() (map[string]string, error) {
+	cols, err := row.Columns()
+	if err != nil {
+		return nil, err
+	}
+
+	var record = make(map[string]string, len(cols))
+	err = row.ScanMap(&record)
+	if err != nil {
+		return nil, err
+	}
+
+	return record, nil
+}
diff --git a/vendor/xorm.io/core/scan.go b/vendor/xorm.io/core/scan.go
new file mode 100644
index 0000000000..897b534159
--- /dev/null
+++ b/vendor/xorm.io/core/scan.go
@@ -0,0 +1,66 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import (
+	"database/sql/driver"
+	"fmt"
+	"time"
+)
+
+type NullTime time.Time
+
+var (
+	_ driver.Valuer = NullTime{}
+)
+
+func (ns *NullTime) Scan(value interface{}) error {
+	if value == nil {
+		return nil
+	}
+	return convertTime(ns, value)
+}
+
+// Value implements the driver Valuer interface.
+func (ns NullTime) Value() (driver.Value, error) {
+	if (time.Time)(ns).IsZero() {
+		return nil, nil
+	}
+	return (time.Time)(ns).Format("2006-01-02 15:04:05"), nil
+}
+
+func convertTime(dest *NullTime, src interface{}) error {
+	// Common cases, without reflect.
+	switch s := src.(type) {
+	case string:
+		t, err := time.Parse("2006-01-02 15:04:05", s)
+		if err != nil {
+			return err
+		}
+		*dest = NullTime(t)
+		return nil
+	case []uint8:
+		t, err := time.Parse("2006-01-02 15:04:05", string(s))
+		if err != nil {
+			return err
+		}
+		*dest = NullTime(t)
+		return nil
+	case time.Time:
+		*dest = NullTime(s)
+		return nil
+	case nil:
+	default:
+		return fmt.Errorf("unsupported driver -> Scan pair: %T -> %T", src, dest)
+	}
+	return nil
+}
+
+type EmptyScanner struct {
+}
+
+func (EmptyScanner) Scan(src interface{}) error {
+	return nil
+}
diff --git a/vendor/xorm.io/core/stmt.go b/vendor/xorm.io/core/stmt.go
new file mode 100644
index 0000000000..20ee202b9b
--- /dev/null
+++ b/vendor/xorm.io/core/stmt.go
@@ -0,0 +1,165 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"reflect"
+)
+
+type Stmt struct {
+	*sql.Stmt
+	db    *DB
+	names map[string]int
+}
+
+func (db *DB) PrepareContext(ctx context.Context, query string) (*Stmt, error) {
+	names := make(map[string]int)
+	var i int
+	query = re.ReplaceAllStringFunc(query, func(src string) string {
+		names[src[1:]] = i
+		i += 1
+		return "?"
+	})
+
+	stmt, err := db.DB.PrepareContext(ctx, query)
+	if err != nil {
+		return nil, err
+	}
+	return &Stmt{stmt, db, names}, nil
+}
+
+func (db *DB) Prepare(query string) (*Stmt, error) {
+	return db.PrepareContext(context.Background(), query)
+}
+
+func (s *Stmt) ExecMapContext(ctx context.Context, mp interface{}) (sql.Result, error) {
+	vv := reflect.ValueOf(mp)
+	if vv.Kind() != reflect.Ptr || vv.Elem().Kind() != reflect.Map {
+		return nil, errors.New("mp should be a map's pointer")
+	}
+
+	args := make([]interface{}, len(s.names))
+	for k, i := range s.names {
+		args[i] = vv.Elem().MapIndex(reflect.ValueOf(k)).Interface()
+	}
+	return s.Stmt.ExecContext(ctx, args...)
+}
+
+func (s *Stmt) ExecMap(mp interface{}) (sql.Result, error) {
+	return s.ExecMapContext(context.Background(), mp)
+}
+
+func (s *Stmt) ExecStructContext(ctx context.Context, st interface{}) (sql.Result, error) {
+	vv := reflect.ValueOf(st)
+	if vv.Kind() != reflect.Ptr || vv.Elem().Kind() != reflect.Struct {
+		return nil, errors.New("mp should be a map's pointer")
+	}
+
+	args := make([]interface{}, len(s.names))
+	for k, i := range s.names {
+		args[i] = vv.Elem().FieldByName(k).Interface()
+	}
+	return s.Stmt.ExecContext(ctx, args...)
+}
+
+func (s *Stmt) ExecStruct(st interface{}) (sql.Result, error) {
+	return s.ExecStructContext(context.Background(), st)
+}
+
+func (s *Stmt) QueryContext(ctx context.Context, args ...interface{}) (*Rows, error) {
+	rows, err := s.Stmt.QueryContext(ctx, args...)
+	if err != nil {
+		return nil, err
+	}
+	return &Rows{rows, s.db}, nil
+}
+
+func (s *Stmt) Query(args ...interface{}) (*Rows, error) {
+	return s.QueryContext(context.Background(), args...)
+}
+
+func (s *Stmt) QueryMapContext(ctx context.Context, mp interface{}) (*Rows, error) {
+	vv := reflect.ValueOf(mp)
+	if vv.Kind() != reflect.Ptr || vv.Elem().Kind() != reflect.Map {
+		return nil, errors.New("mp should be a map's pointer")
+	}
+
+	args := make([]interface{}, len(s.names))
+	for k, i := range s.names {
+		args[i] = vv.Elem().MapIndex(reflect.ValueOf(k)).Interface()
+	}
+
+	return s.QueryContext(ctx, args...)
+}
+
+func (s *Stmt) QueryMap(mp interface{}) (*Rows, error) {
+	return s.QueryMapContext(context.Background(), mp)
+}
+
+func (s *Stmt) QueryStructContext(ctx context.Context, st interface{}) (*Rows, error) {
+	vv := reflect.ValueOf(st)
+	if vv.Kind() != reflect.Ptr || vv.Elem().Kind() != reflect.Struct {
+		return nil, errors.New("mp should be a map's pointer")
+	}
+
+	args := make([]interface{}, len(s.names))
+	for k, i := range s.names {
+		args[i] = vv.Elem().FieldByName(k).Interface()
+	}
+
+	return s.Query(args...)
+}
+
+func (s *Stmt) QueryStruct(st interface{}) (*Rows, error) {
+	return s.QueryStructContext(context.Background(), st)
+}
+
+func (s *Stmt) QueryRowContext(ctx context.Context, args ...interface{}) *Row {
+	rows, err := s.QueryContext(ctx, args...)
+	return &Row{rows, err}
+}
+
+func (s *Stmt) QueryRow(args ...interface{}) *Row {
+	return s.QueryRowContext(context.Background(), args...)
+}
+
+func (s *Stmt) QueryRowMapContext(ctx context.Context, mp interface{}) *Row {
+	vv := reflect.ValueOf(mp)
+	if vv.Kind() != reflect.Ptr || vv.Elem().Kind() != reflect.Map {
+		return &Row{nil, errors.New("mp should be a map's pointer")}
+	}
+
+	args := make([]interface{}, len(s.names))
+	for k, i := range s.names {
+		args[i] = vv.Elem().MapIndex(reflect.ValueOf(k)).Interface()
+	}
+
+	return s.QueryRowContext(ctx, args...)
+}
+
+func (s *Stmt) QueryRowMap(mp interface{}) *Row {
+	return s.QueryRowMapContext(context.Background(), mp)
+}
+
+func (s *Stmt) QueryRowStructContext(ctx context.Context, st interface{}) *Row {
+	vv := reflect.ValueOf(st)
+	if vv.Kind() != reflect.Ptr || vv.Elem().Kind() != reflect.Struct {
+		return &Row{nil, errors.New("st should be a struct's pointer")}
+	}
+
+	args := make([]interface{}, len(s.names))
+	for k, i := range s.names {
+		args[i] = vv.Elem().FieldByName(k).Interface()
+	}
+
+	return s.QueryRowContext(ctx, args...)
+}
+
+func (s *Stmt) QueryRowStruct(st interface{}) *Row {
+	return s.QueryRowStructContext(context.Background(), st)
+}
diff --git a/vendor/xorm.io/core/table.go b/vendor/xorm.io/core/table.go
new file mode 100644
index 0000000000..d129e60f8b
--- /dev/null
+++ b/vendor/xorm.io/core/table.go
@@ -0,0 +1,154 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import (
+	"reflect"
+	"strings"
+)
+
+// database table
+type Table struct {
+	Name          string
+	Type          reflect.Type
+	columnsSeq    []string
+	columnsMap    map[string][]*Column
+	columns       []*Column
+	Indexes       map[string]*Index
+	PrimaryKeys   []string
+	AutoIncrement string
+	Created       map[string]bool
+	Updated       string
+	Deleted       string
+	Version       string
+	Cacher        Cacher
+	StoreEngine   string
+	Charset       string
+	Comment       string
+}
+
+func (table *Table) Columns() []*Column {
+	return table.columns
+}
+
+func (table *Table) ColumnsSeq() []string {
+	return table.columnsSeq
+}
+
+func NewEmptyTable() *Table {
+	return NewTable("", nil)
+}
+
+func NewTable(name string, t reflect.Type) *Table {
+	return &Table{Name: name, Type: t,
+		columnsSeq:  make([]string, 0),
+		columns:     make([]*Column, 0),
+		columnsMap:  make(map[string][]*Column),
+		Indexes:     make(map[string]*Index),
+		Created:     make(map[string]bool),
+		PrimaryKeys: make([]string, 0),
+	}
+}
+
+func (table *Table) columnsByName(name string) []*Column {
+	n := len(name)
+
+	for k := range table.columnsMap {
+		if len(k) != n {
+			continue
+		}
+		if strings.EqualFold(k, name) {
+			return table.columnsMap[k]
+		}
+	}
+	return nil
+}
+
+func (table *Table) GetColumn(name string) *Column {
+
+	cols := table.columnsByName(name)
+
+	if cols != nil {
+		return cols[0]
+	}
+
+	return nil
+}
+
+func (table *Table) GetColumnIdx(name string, idx int) *Column {
+	cols := table.columnsByName(name)
+
+	if cols != nil && idx < len(cols) {
+		return cols[idx]
+	}
+
+	return nil
+}
+
+// if has primary key, return column
+func (table *Table) PKColumns() []*Column {
+	columns := make([]*Column, len(table.PrimaryKeys))
+	for i, name := range table.PrimaryKeys {
+		columns[i] = table.GetColumn(name)
+	}
+	return columns
+}
+
+func (table *Table) ColumnType(name string) reflect.Type {
+	t, _ := table.Type.FieldByName(name)
+	return t.Type
+}
+
+func (table *Table) AutoIncrColumn() *Column {
+	return table.GetColumn(table.AutoIncrement)
+}
+
+func (table *Table) VersionColumn() *Column {
+	return table.GetColumn(table.Version)
+}
+
+func (table *Table) UpdatedColumn() *Column {
+	return table.GetColumn(table.Updated)
+}
+
+func (table *Table) DeletedColumn() *Column {
+	return table.GetColumn(table.Deleted)
+}
+
+// add a column to table
+func (table *Table) AddColumn(col *Column) {
+	table.columnsSeq = append(table.columnsSeq, col.Name)
+	table.columns = append(table.columns, col)
+	colName := strings.ToLower(col.Name)
+	if c, ok := table.columnsMap[colName]; ok {
+		table.columnsMap[colName] = append(c, col)
+	} else {
+		table.columnsMap[colName] = []*Column{col}
+	}
+
+	if col.IsPrimaryKey {
+		table.PrimaryKeys = append(table.PrimaryKeys, col.Name)
+	}
+	if col.IsAutoIncrement {
+		table.AutoIncrement = col.Name
+	}
+	if col.IsCreated {
+		table.Created[col.Name] = true
+	}
+	if col.IsUpdated {
+		table.Updated = col.Name
+	}
+	if col.IsDeleted {
+		table.Deleted = col.Name
+	}
+	if col.IsVersion {
+		table.Version = col.Name
+	}
+}
+
+// add an index or an unique to table
+func (table *Table) AddIndex(index *Index) {
+	table.Indexes[index.Name] = index
+}
diff --git a/vendor/xorm.io/core/tx.go b/vendor/xorm.io/core/tx.go
new file mode 100644
index 0000000000..a56b70063e
--- /dev/null
+++ b/vendor/xorm.io/core/tx.go
@@ -0,0 +1,153 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import (
+	"context"
+	"database/sql"
+)
+
+type Tx struct {
+	*sql.Tx
+	db *DB
+}
+
+func (db *DB) BeginTx(ctx context.Context, opts *sql.TxOptions) (*Tx, error) {
+	tx, err := db.DB.BeginTx(ctx, opts)
+	if err != nil {
+		return nil, err
+	}
+	return &Tx{tx, db}, nil
+}
+
+func (db *DB) Begin() (*Tx, error) {
+	tx, err := db.DB.Begin()
+	if err != nil {
+		return nil, err
+	}
+	return &Tx{tx, db}, nil
+}
+
+func (tx *Tx) PrepareContext(ctx context.Context, query string) (*Stmt, error) {
+	names := make(map[string]int)
+	var i int
+	query = re.ReplaceAllStringFunc(query, func(src string) string {
+		names[src[1:]] = i
+		i += 1
+		return "?"
+	})
+
+	stmt, err := tx.Tx.PrepareContext(ctx, query)
+	if err != nil {
+		return nil, err
+	}
+	return &Stmt{stmt, tx.db, names}, nil
+}
+
+func (tx *Tx) Prepare(query string) (*Stmt, error) {
+	return tx.PrepareContext(context.Background(), query)
+}
+
+func (tx *Tx) StmtContext(ctx context.Context, stmt *Stmt) *Stmt {
+	stmt.Stmt = tx.Tx.StmtContext(ctx, stmt.Stmt)
+	return stmt
+}
+
+func (tx *Tx) Stmt(stmt *Stmt) *Stmt {
+	return tx.StmtContext(context.Background(), stmt)
+}
+
+func (tx *Tx) ExecMapContext(ctx context.Context, query string, mp interface{}) (sql.Result, error) {
+	query, args, err := MapToSlice(query, mp)
+	if err != nil {
+		return nil, err
+	}
+	return tx.Tx.ExecContext(ctx, query, args...)
+}
+
+func (tx *Tx) ExecMap(query string, mp interface{}) (sql.Result, error) {
+	return tx.ExecMapContext(context.Background(), query, mp)
+}
+
+func (tx *Tx) ExecStructContext(ctx context.Context, query string, st interface{}) (sql.Result, error) {
+	query, args, err := StructToSlice(query, st)
+	if err != nil {
+		return nil, err
+	}
+	return tx.Tx.ExecContext(ctx, query, args...)
+}
+
+func (tx *Tx) ExecStruct(query string, st interface{}) (sql.Result, error) {
+	return tx.ExecStructContext(context.Background(), query, st)
+}
+
+func (tx *Tx) QueryContext(ctx context.Context, query string, args ...interface{}) (*Rows, error) {
+	rows, err := tx.Tx.QueryContext(ctx, query, args...)
+	if err != nil {
+		return nil, err
+	}
+	return &Rows{rows, tx.db}, nil
+}
+
+func (tx *Tx) Query(query string, args ...interface{}) (*Rows, error) {
+	return tx.QueryContext(context.Background(), query, args...)
+}
+
+func (tx *Tx) QueryMapContext(ctx context.Context, query string, mp interface{}) (*Rows, error) {
+	query, args, err := MapToSlice(query, mp)
+	if err != nil {
+		return nil, err
+	}
+	return tx.QueryContext(ctx, query, args...)
+}
+
+func (tx *Tx) QueryMap(query string, mp interface{}) (*Rows, error) {
+	return tx.QueryMapContext(context.Background(), query, mp)
+}
+
+func (tx *Tx) QueryStructContext(ctx context.Context, query string, st interface{}) (*Rows, error) {
+	query, args, err := StructToSlice(query, st)
+	if err != nil {
+		return nil, err
+	}
+	return tx.QueryContext(ctx, query, args...)
+}
+
+func (tx *Tx) QueryStruct(query string, st interface{}) (*Rows, error) {
+	return tx.QueryStructContext(context.Background(), query, st)
+}
+
+func (tx *Tx) QueryRowContext(ctx context.Context, query string, args ...interface{}) *Row {
+	rows, err := tx.QueryContext(ctx, query, args...)
+	return &Row{rows, err}
+}
+
+func (tx *Tx) QueryRow(query string, args ...interface{}) *Row {
+	return tx.QueryRowContext(context.Background(), query, args...)
+}
+
+func (tx *Tx) QueryRowMapContext(ctx context.Context, query string, mp interface{}) *Row {
+	query, args, err := MapToSlice(query, mp)
+	if err != nil {
+		return &Row{nil, err}
+	}
+	return tx.QueryRowContext(ctx, query, args...)
+}
+
+func (tx *Tx) QueryRowMap(query string, mp interface{}) *Row {
+	return tx.QueryRowMapContext(context.Background(), query, mp)
+}
+
+func (tx *Tx) QueryRowStructContext(ctx context.Context, query string, st interface{}) *Row {
+	query, args, err := StructToSlice(query, st)
+	if err != nil {
+		return &Row{nil, err}
+	}
+	return tx.QueryRowContext(ctx, query, args...)
+}
+
+func (tx *Tx) QueryRowStruct(query string, st interface{}) *Row {
+	return tx.QueryRowStructContext(context.Background(), query, st)
+}
diff --git a/vendor/xorm.io/core/type.go b/vendor/xorm.io/core/type.go
new file mode 100644
index 0000000000..8164953602
--- /dev/null
+++ b/vendor/xorm.io/core/type.go
@@ -0,0 +1,323 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package core
+
+import (
+	"reflect"
+	"sort"
+	"strings"
+	"time"
+)
+
+const (
+	POSTGRES = "postgres"
+	SQLITE   = "sqlite3"
+	MYSQL    = "mysql"
+	MSSQL    = "mssql"
+	ORACLE   = "oracle"
+)
+
+// xorm SQL types
+type SQLType struct {
+	Name           string
+	DefaultLength  int
+	DefaultLength2 int
+}
+
+const (
+	UNKNOW_TYPE = iota
+	TEXT_TYPE
+	BLOB_TYPE
+	TIME_TYPE
+	NUMERIC_TYPE
+)
+
+func (s *SQLType) IsType(st int) bool {
+	if t, ok := SqlTypes[s.Name]; ok && t == st {
+		return true
+	}
+	return false
+}
+
+func (s *SQLType) IsText() bool {
+	return s.IsType(TEXT_TYPE)
+}
+
+func (s *SQLType) IsBlob() bool {
+	return s.IsType(BLOB_TYPE)
+}
+
+func (s *SQLType) IsTime() bool {
+	return s.IsType(TIME_TYPE)
+}
+
+func (s *SQLType) IsNumeric() bool {
+	return s.IsType(NUMERIC_TYPE)
+}
+
+func (s *SQLType) IsJson() bool {
+	return s.Name == Json || s.Name == Jsonb
+}
+
+var (
+	Bit       = "BIT"
+	TinyInt   = "TINYINT"
+	SmallInt  = "SMALLINT"
+	MediumInt = "MEDIUMINT"
+	Int       = "INT"
+	Integer   = "INTEGER"
+	BigInt    = "BIGINT"
+
+	Enum = "ENUM"
+	Set  = "SET"
+
+	Char             = "CHAR"
+	Varchar          = "VARCHAR"
+	NChar            = "NCHAR"
+	NVarchar         = "NVARCHAR"
+	TinyText         = "TINYTEXT"
+	Text             = "TEXT"
+	NText            = "NTEXT"
+	Clob             = "CLOB"
+	MediumText       = "MEDIUMTEXT"
+	LongText         = "LONGTEXT"
+	Uuid             = "UUID"
+	UniqueIdentifier = "UNIQUEIDENTIFIER"
+	SysName          = "SYSNAME"
+
+	Date       = "DATE"
+	DateTime   = "DATETIME"
+	SmallDateTime   = "SMALLDATETIME"
+	Time       = "TIME"
+	TimeStamp  = "TIMESTAMP"
+	TimeStampz = "TIMESTAMPZ"
+
+	Decimal = "DECIMAL"
+	Numeric = "NUMERIC"
+	Money   = "MONEY"
+	SmallMoney = "SMALLMONEY"
+
+	Real   = "REAL"
+	Float  = "FLOAT"
+	Double = "DOUBLE"
+
+	Binary     = "BINARY"
+	VarBinary  = "VARBINARY"
+	TinyBlob   = "TINYBLOB"
+	Blob       = "BLOB"
+	MediumBlob = "MEDIUMBLOB"
+	LongBlob   = "LONGBLOB"
+	Bytea      = "BYTEA"
+
+	Bool    = "BOOL"
+	Boolean = "BOOLEAN"
+
+	Serial    = "SERIAL"
+	BigSerial = "BIGSERIAL"
+
+	Json  = "JSON"
+	Jsonb = "JSONB"
+
+	SqlTypes = map[string]int{
+		Bit:       NUMERIC_TYPE,
+		TinyInt:   NUMERIC_TYPE,
+		SmallInt:  NUMERIC_TYPE,
+		MediumInt: NUMERIC_TYPE,
+		Int:       NUMERIC_TYPE,
+		Integer:   NUMERIC_TYPE,
+		BigInt:    NUMERIC_TYPE,
+
+		Enum:  TEXT_TYPE,
+		Set:   TEXT_TYPE,
+		Json:  TEXT_TYPE,
+		Jsonb: TEXT_TYPE,
+
+		Char:       TEXT_TYPE,
+		NChar:      TEXT_TYPE,
+		Varchar:    TEXT_TYPE,
+		NVarchar:   TEXT_TYPE,
+		TinyText:   TEXT_TYPE,
+		Text:       TEXT_TYPE,
+		NText:      TEXT_TYPE,
+		MediumText: TEXT_TYPE,
+		LongText:   TEXT_TYPE,
+		Uuid:       TEXT_TYPE,
+		Clob:       TEXT_TYPE,
+		SysName:    TEXT_TYPE,
+
+		Date:       TIME_TYPE,
+		DateTime:   TIME_TYPE,
+		Time:       TIME_TYPE,
+		TimeStamp:  TIME_TYPE,
+		TimeStampz: TIME_TYPE,
+		SmallDateTime:   TIME_TYPE,
+
+		Decimal: NUMERIC_TYPE,
+		Numeric: NUMERIC_TYPE,
+		Real:    NUMERIC_TYPE,
+		Float:   NUMERIC_TYPE,
+		Double:  NUMERIC_TYPE,
+		Money:   NUMERIC_TYPE,
+		SmallMoney: NUMERIC_TYPE,
+
+		Binary:    BLOB_TYPE,
+		VarBinary: BLOB_TYPE,
+
+		TinyBlob:         BLOB_TYPE,
+		Blob:             BLOB_TYPE,
+		MediumBlob:       BLOB_TYPE,
+		LongBlob:         BLOB_TYPE,
+		Bytea:            BLOB_TYPE,
+		UniqueIdentifier: BLOB_TYPE,
+
+		Bool: NUMERIC_TYPE,
+
+		Serial:    NUMERIC_TYPE,
+		BigSerial: NUMERIC_TYPE,
+	}
+
+	intTypes  = sort.StringSlice{"*int", "*int16", "*int32", "*int8"}
+	uintTypes = sort.StringSlice{"*uint", "*uint16", "*uint32", "*uint8"}
+)
+
+// !nashtsai! treat following var as interal const values, these are used for reflect.TypeOf comparison
+var (
+	c_EMPTY_STRING       string
+	c_BOOL_DEFAULT       bool
+	c_BYTE_DEFAULT       byte
+	c_COMPLEX64_DEFAULT  complex64
+	c_COMPLEX128_DEFAULT complex128
+	c_FLOAT32_DEFAULT    float32
+	c_FLOAT64_DEFAULT    float64
+	c_INT64_DEFAULT      int64
+	c_UINT64_DEFAULT     uint64
+	c_INT32_DEFAULT      int32
+	c_UINT32_DEFAULT     uint32
+	c_INT16_DEFAULT      int16
+	c_UINT16_DEFAULT     uint16
+	c_INT8_DEFAULT       int8
+	c_UINT8_DEFAULT      uint8
+	c_INT_DEFAULT        int
+	c_UINT_DEFAULT       uint
+	c_TIME_DEFAULT       time.Time
+)
+
+var (
+	IntType   = reflect.TypeOf(c_INT_DEFAULT)
+	Int8Type  = reflect.TypeOf(c_INT8_DEFAULT)
+	Int16Type = reflect.TypeOf(c_INT16_DEFAULT)
+	Int32Type = reflect.TypeOf(c_INT32_DEFAULT)
+	Int64Type = reflect.TypeOf(c_INT64_DEFAULT)
+
+	UintType   = reflect.TypeOf(c_UINT_DEFAULT)
+	Uint8Type  = reflect.TypeOf(c_UINT8_DEFAULT)
+	Uint16Type = reflect.TypeOf(c_UINT16_DEFAULT)
+	Uint32Type = reflect.TypeOf(c_UINT32_DEFAULT)
+	Uint64Type = reflect.TypeOf(c_UINT64_DEFAULT)
+
+	Float32Type = reflect.TypeOf(c_FLOAT32_DEFAULT)
+	Float64Type = reflect.TypeOf(c_FLOAT64_DEFAULT)
+
+	Complex64Type  = reflect.TypeOf(c_COMPLEX64_DEFAULT)
+	Complex128Type = reflect.TypeOf(c_COMPLEX128_DEFAULT)
+
+	StringType = reflect.TypeOf(c_EMPTY_STRING)
+	BoolType   = reflect.TypeOf(c_BOOL_DEFAULT)
+	ByteType   = reflect.TypeOf(c_BYTE_DEFAULT)
+	BytesType  = reflect.SliceOf(ByteType)
+
+	TimeType = reflect.TypeOf(c_TIME_DEFAULT)
+)
+
+var (
+	PtrIntType   = reflect.PtrTo(IntType)
+	PtrInt8Type  = reflect.PtrTo(Int8Type)
+	PtrInt16Type = reflect.PtrTo(Int16Type)
+	PtrInt32Type = reflect.PtrTo(Int32Type)
+	PtrInt64Type = reflect.PtrTo(Int64Type)
+
+	PtrUintType   = reflect.PtrTo(UintType)
+	PtrUint8Type  = reflect.PtrTo(Uint8Type)
+	PtrUint16Type = reflect.PtrTo(Uint16Type)
+	PtrUint32Type = reflect.PtrTo(Uint32Type)
+	PtrUint64Type = reflect.PtrTo(Uint64Type)
+
+	PtrFloat32Type = reflect.PtrTo(Float32Type)
+	PtrFloat64Type = reflect.PtrTo(Float64Type)
+
+	PtrComplex64Type  = reflect.PtrTo(Complex64Type)
+	PtrComplex128Type = reflect.PtrTo(Complex128Type)
+
+	PtrStringType = reflect.PtrTo(StringType)
+	PtrBoolType   = reflect.PtrTo(BoolType)
+	PtrByteType   = reflect.PtrTo(ByteType)
+
+	PtrTimeType = reflect.PtrTo(TimeType)
+)
+
+// Type2SQLType generate SQLType acorrding Go's type
+func Type2SQLType(t reflect.Type) (st SQLType) {
+	switch k := t.Kind(); k {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32:
+		st = SQLType{Int, 0, 0}
+	case reflect.Int64, reflect.Uint64:
+		st = SQLType{BigInt, 0, 0}
+	case reflect.Float32:
+		st = SQLType{Float, 0, 0}
+	case reflect.Float64:
+		st = SQLType{Double, 0, 0}
+	case reflect.Complex64, reflect.Complex128:
+		st = SQLType{Varchar, 64, 0}
+	case reflect.Array, reflect.Slice, reflect.Map:
+		if t.Elem() == reflect.TypeOf(c_BYTE_DEFAULT) {
+			st = SQLType{Blob, 0, 0}
+		} else {
+			st = SQLType{Text, 0, 0}
+		}
+	case reflect.Bool:
+		st = SQLType{Bool, 0, 0}
+	case reflect.String:
+		st = SQLType{Varchar, 255, 0}
+	case reflect.Struct:
+		if t.ConvertibleTo(TimeType) {
+			st = SQLType{DateTime, 0, 0}
+		} else {
+			// TODO need to handle association struct
+			st = SQLType{Text, 0, 0}
+		}
+	case reflect.Ptr:
+		st = Type2SQLType(t.Elem())
+	default:
+		st = SQLType{Text, 0, 0}
+	}
+	return
+}
+
+// default sql type change to go types
+func SQLType2Type(st SQLType) reflect.Type {
+	name := strings.ToUpper(st.Name)
+	switch name {
+	case Bit, TinyInt, SmallInt, MediumInt, Int, Integer, Serial:
+		return reflect.TypeOf(1)
+	case BigInt, BigSerial:
+		return reflect.TypeOf(int64(1))
+	case Float, Real:
+		return reflect.TypeOf(float32(1))
+	case Double:
+		return reflect.TypeOf(float64(1))
+	case Char, NChar, Varchar, NVarchar, TinyText, Text, NText, MediumText, LongText, Enum, Set, Uuid, Clob, SysName:
+		return reflect.TypeOf("")
+	case TinyBlob, Blob, LongBlob, Bytea, Binary, MediumBlob, VarBinary, UniqueIdentifier:
+		return reflect.TypeOf([]byte{})
+	case Bool:
+		return reflect.TypeOf(true)
+	case DateTime, Date, Time, TimeStamp, TimeStampz, SmallDateTime:
+		return reflect.TypeOf(c_TIME_DEFAULT)
+	case Decimal, Numeric, Money, SmallMoney:
+		return reflect.TypeOf("")
+	default:
+		return reflect.TypeOf("")
+	}
+}