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Beego/orm/qb.go

63 lines
2.0 KiB
Go

// Copyright 2014 beego Author. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package orm
import "errors"
// QueryBuilder is the Query builder interface
type QueryBuilder interface {
Select(fields ...string) QueryBuilder
ForUpdate() QueryBuilder
From(tables ...string) QueryBuilder
InnerJoin(table string) QueryBuilder
LeftJoin(table string) QueryBuilder
RightJoin(table string) QueryBuilder
On(cond string) QueryBuilder
Where(cond string) QueryBuilder
And(cond string) QueryBuilder
Or(cond string) QueryBuilder
In(vals ...string) QueryBuilder
OrderBy(fields ...string) QueryBuilder
Asc() QueryBuilder
Desc() QueryBuilder
Limit(limit int) QueryBuilder
Offset(offset int) QueryBuilder
GroupBy(fields ...string) QueryBuilder
Having(cond string) QueryBuilder
Update(tables ...string) QueryBuilder
Set(kv ...string) QueryBuilder
Delete(tables ...string) QueryBuilder
InsertInto(table string, fields ...string) QueryBuilder
Values(vals ...string) QueryBuilder
Subquery(sub string, alias string) string
String() string
}
// NewQueryBuilder return the QueryBuilder
func NewQueryBuilder(driver string) (qb QueryBuilder, err error) {
if driver == "mysql" {
qb = new(MySQLQueryBuilder)
} else if driver == "tidb" {
qb = new(TiDBQueryBuilder)
} else if driver == "postgres" {
err = errors.New("postgres query builder is not supported yet")
} else if driver == "sqlite" {
err = errors.New("sqlite query builder is not supported yet")
} else {
err = errors.New("unknown driver for query builder")
}
return
}