1 files changed, 145 insertions, 0 deletions
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
+}