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Fix Migration 145 on MSSQL if varchar is changed to nvarchar (#12445)
* Handle MSSQL constraints Signed-off-by: Andrew Thornton <art27@cantab.net> * Update models/migrations/v145.go * Prevent hang with Sync2 * Agh it's uniques not indexes * Let us try a different way of finding constraints on the language column Signed-off-by: Andrew Thornton <art27@cantab.net> * minor simplification Signed-off-by: Andrew Thornton <art27@cantab.net> * Try drop index instead? Signed-off-by: Andrew Thornton <art27@cantab.net>
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@ -47,9 +47,31 @@ func increaseLanguageField(x *xorm.Engine) error {
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return err
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}
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case setting.Database.UseMSSQL:
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// Yet again MSSQL just has to be awkward.
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// Here we have to drop the constraints first and then rebuild them
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constraints := make([]string, 0)
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if err := sess.SQL(`SELECT i.name AS Name
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FROM sys.indexes i INNER JOIN sys.index_columns ic
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ON i.index_id = ic.index_id AND i.object_id = ic.object_id
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INNER JOIN sys.tables AS t
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ON t.object_id = i.object_id
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INNER JOIN sys.columns c
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ON t.object_id = c.object_id AND ic.column_id = c.column_id
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WHERE t.name = 'language_stat' AND c.name = 'language'`).Find(&constraints); err != nil {
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return fmt.Errorf("Find constraints: %v", err)
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}
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for _, constraint := range constraints {
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if _, err := sess.Exec(fmt.Sprintf("DROP INDEX [%s] ON `language_stat`", constraint)); err != nil {
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return fmt.Errorf("Drop table `language_stat` constraint `%s`: %v", constraint, err)
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}
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}
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if _, err := sess.Exec(fmt.Sprintf("ALTER TABLE language_stat ALTER COLUMN language %s", sqlType)); err != nil {
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return err
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}
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// Finally restore the constraint
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if err := sess.CreateUniques(new(LanguageStat)); err != nil {
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return err
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}
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case setting.Database.UsePostgreSQL:
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if _, err := sess.Exec(fmt.Sprintf("ALTER TABLE language_stat ALTER COLUMN language TYPE %s", sqlType)); err != nil {
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return err
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