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