fix only add column if not exists for mysql

2018-12-18 23:02:08 +01:00
parent a451c20129
commit 12f3c8f9d6
5 changed files with 36 additions and 10 deletions
@@ -33,6 +33,7 @@ type Dialect interface {
 	UpdateTableSql(tableName string, columns []*Column) string

 	IndexCheckSql(tableName, indexName string) (string, []interface{})
+	ColumnCheckSql(tableName, columnName string) (string, []interface{})

 	ColString(*Column) string
 	ColStringNoPk(*Column) string
@@ -183,6 +184,10 @@ func (db *BaseDialect) RenameTable(oldName string, newName string) string {
 	return fmt.Sprintf("ALTER TABLE %s RENAME TO %s", quote(oldName), quote(newName))
 }

+func (db *BaseDialect) ColumnCheckSql(tableName, columnName string) (string, []interface{}) {
+	return "", nil
+}
+
 func (db *BaseDialect) DropIndexSql(tableName string, index *Index) string {
 	quote := db.dialect.Quote
 	name := index.XName(tableName)