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