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Support converting varchar to nvarchar for mssql database (#24105)
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commit
cda84bec87
@ -17,7 +17,7 @@ import (
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var CmdConvert = cli.Command{
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Name: "convert",
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Usage: "Convert the database",
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Description: "A command to convert an existing MySQL database from utf8 to utf8mb4",
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Description: "A command to convert an existing MySQL database from utf8 to utf8mb4 or MSSQL database from varchar to nvarchar",
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Action: runConvert,
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}
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@ -35,17 +35,22 @@ func runConvert(ctx *cli.Context) error {
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log.Info("Log path: %s", setting.Log.RootPath)
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log.Info("Configuration file: %s", setting.CustomConf)
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if !setting.Database.Type.IsMySQL() {
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fmt.Println("This command can only be used with a MySQL database")
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return nil
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}
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switch {
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case setting.Database.Type.IsMySQL():
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if err := db.ConvertUtf8ToUtf8mb4(); err != nil {
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log.Fatal("Failed to convert database from utf8 to utf8mb4: %v", err)
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return err
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}
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fmt.Println("Converted successfully, please confirm your database's character set is now utf8mb4")
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case setting.Database.Type.IsMSSQL():
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if err := db.ConvertVarcharToNVarchar(); err != nil {
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log.Fatal("Failed to convert database from varchar to nvarchar: %v", err)
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return err
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}
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fmt.Println("Converted successfully, please confirm your database's all columns character is NVARCHAR now")
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default:
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fmt.Println("This command can only be used with a MySQL or MSSQL database")
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}
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return nil
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}
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@ -42,6 +42,33 @@ func ConvertUtf8ToUtf8mb4() error {
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return nil
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}
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// ConvertVarcharToNVarchar converts database and tables from varchar to nvarchar if it's mssql
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func ConvertVarcharToNVarchar() error {
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if x.Dialect().URI().DBType != schemas.MSSQL {
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return nil
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}
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sess := x.NewSession()
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defer sess.Close()
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res, err := sess.QuerySliceString(`SELECT 'ALTER TABLE ' + OBJECT_NAME(SC.object_id) + ' MODIFY SC.name NVARCHAR(' + CONVERT(VARCHAR(5),SC.max_length) + ')'
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FROM SYS.columns SC
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JOIN SYS.types ST
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ON SC.system_type_id = ST.system_type_id
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AND SC.user_type_id = ST.user_type_id
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WHERE ST.name ='varchar'`)
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if err != nil {
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return err
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}
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for _, row := range res {
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if len(row) == 1 {
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if _, err = sess.Exec(row[0]); err != nil {
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return err
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}
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}
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}
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return err
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}
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// Cell2Int64 converts a xorm.Cell type to int64,
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// and handles possible irregular cases.
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func Cell2Int64(val xorm.Cell) int64 {
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