Платформа ЦРНП "Мирокод" для разработки проектов
https://git.mirocod.ru
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
47 lines
982 B
47 lines
982 B
// 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 |
|
}
|
|
|