mirror of
https://github.com/go-gitea/gitea
synced 2024-12-25 00:04:46 +01:00
c61b902538
* Upgrade xorm to v1.0.0 * small nit * Fix tests * Update xorm * Update xorm * fix go.sum * fix test * Fix bug when dump * Fix bug * update xorm to latest * Fix migration test * update xorm to latest * Fix import order * Use xorm tag
103 lines
2.5 KiB
Go
Vendored
103 lines
2.5 KiB
Go
Vendored
// 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
|
|
defer func() {
|
|
b.limitation = limit
|
|
}()
|
|
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 == setOpType {
|
|
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 == setOpType {
|
|
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 == setOpType {
|
|
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
|
|
}
|