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Beego/orm/db_mysql.go
2015-09-12 21:46:43 +08:00

105 lines
3.0 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 (
"fmt"
)
// mysql operators.
var mysqlOperators = map[string]string{
"exact": "= ?",
"iexact": "LIKE ?",
"contains": "LIKE BINARY ?",
"icontains": "LIKE ?",
// "regex": "REGEXP BINARY ?",
// "iregex": "REGEXP ?",
"gt": "> ?",
"gte": ">= ?",
"lt": "< ?",
"lte": "<= ?",
"eq": "= ?",
"ne": "!= ?",
"startswith": "LIKE BINARY ?",
"endswith": "LIKE BINARY ?",
"istartswith": "LIKE ?",
"iendswith": "LIKE ?",
}
// mysql column field types.
var mysqlTypes = map[string]string{
"auto": "AUTO_INCREMENT NOT NULL PRIMARY KEY",
"pk": "NOT NULL PRIMARY KEY",
"bool": "bool",
"string": "varchar(%d)",
"string-text": "longtext",
"time.Time-date": "date",
"time.Time": "datetime",
"int8": "tinyint",
"int16": "smallint",
"int32": "integer",
"int64": "bigint",
"uint8": "tinyint unsigned",
"uint16": "smallint unsigned",
"uint32": "integer unsigned",
"uint64": "bigint unsigned",
"float64": "double precision",
"float64-decimal": "numeric(%d, %d)",
}
// mysql dbBaser implementation.
type dbBaseMysql struct {
dbBase
}
var _ dbBaser = new(dbBaseMysql)
// get mysql operator.
func (d *dbBaseMysql) OperatorSQL(operator string) string {
return mysqlOperators[operator]
}
// get mysql table field types.
func (d *dbBaseMysql) DbTypes() map[string]string {
return mysqlTypes
}
// show table sql for mysql.
func (d *dbBaseMysql) ShowTablesQuery() string {
return "SELECT table_name FROM information_schema.tables WHERE table_type = 'BASE TABLE' AND table_schema = DATABASE()"
}
// show columns sql of table for mysql.
func (d *dbBaseMysql) ShowColumnsQuery(table string) string {
return fmt.Sprintf("SELECT COLUMN_NAME, COLUMN_TYPE, IS_NULLABLE FROM information_schema.columns "+
"WHERE table_schema = DATABASE() AND table_name = '%s'", table)
}
// execute sql to check index exist.
func (d *dbBaseMysql) IndexExists(db dbQuerier, table string, name string) bool {
row := db.QueryRow("SELECT count(*) FROM information_schema.statistics "+
"WHERE table_schema = DATABASE() AND table_name = ? AND index_name = ?", table, name)
var cnt int
row.Scan(&cnt)
return cnt > 0
}
// create new mysql dbBaser.
func newdbBaseMysql() dbBaser {
b := new(dbBaseMysql)
b.ins = b
return b
}