95 lines
1.9 KiB
Go
Vendored
95 lines
1.9 KiB
Go
Vendored
// 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 statements
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
|
|
"xorm.io/builder"
|
|
"xorm.io/xorm/schemas"
|
|
)
|
|
|
|
// ErrUnsupportedExprType represents an error with unsupported express type
|
|
type ErrUnsupportedExprType struct {
|
|
tp string
|
|
}
|
|
|
|
func (err ErrUnsupportedExprType) Error() string {
|
|
return fmt.Sprintf("Unsupported expression type: %v", err.tp)
|
|
}
|
|
|
|
// Expr represents an SQL express
|
|
type Expr struct {
|
|
ColName string
|
|
Arg interface{}
|
|
}
|
|
|
|
// WriteArgs writes args to the writer
|
|
func (expr *Expr) WriteArgs(w *builder.BytesWriter) error {
|
|
switch arg := expr.Arg.(type) {
|
|
case *builder.Builder:
|
|
if _, err := w.WriteString("("); err != nil {
|
|
return err
|
|
}
|
|
if err := arg.WriteTo(w); err != nil {
|
|
return err
|
|
}
|
|
if _, err := w.WriteString(")"); err != nil {
|
|
return err
|
|
}
|
|
case string:
|
|
if arg == "" {
|
|
arg = "''"
|
|
}
|
|
if _, err := w.WriteString(fmt.Sprintf("%v", arg)); err != nil {
|
|
return err
|
|
}
|
|
default:
|
|
if _, err := w.WriteString("?"); err != nil {
|
|
return err
|
|
}
|
|
w.Append(arg)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
type exprParams []Expr
|
|
|
|
func (exprs exprParams) ColNames() []string {
|
|
var cols = make([]string, 0, len(exprs))
|
|
for _, expr := range exprs {
|
|
cols = append(cols, expr.ColName)
|
|
}
|
|
return cols
|
|
}
|
|
|
|
func (exprs *exprParams) Add(name string, arg interface{}) {
|
|
*exprs = append(*exprs, Expr{name, arg})
|
|
}
|
|
|
|
func (exprs exprParams) IsColExist(colName string) bool {
|
|
for _, expr := range exprs {
|
|
if strings.EqualFold(schemas.CommonQuoter.Trim(expr.ColName), schemas.CommonQuoter.Trim(colName)) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func (exprs exprParams) WriteArgs(w *builder.BytesWriter) error {
|
|
for i, expr := range exprs {
|
|
if err := expr.WriteArgs(w); err != nil {
|
|
return err
|
|
}
|
|
if i != len(exprs)-1 {
|
|
if _, err := w.WriteString(","); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|