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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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zeripath 2020-08-10 14:01:10 +01:00 committed by GitHub
parent 02e990a89b
commit d87dbd7519
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models/migrations/v145.go
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@ -47,9 +47,31 @@ func increaseLanguageField(x *xorm.Engine) error {
return err return err
} }
case setting.Database.UseMSSQL: case setting.Database.UseMSSQL:
// Yet again MSSQL just has to be awkward.
// Here we have to drop the constraints first and then rebuild them
constraints := make([]string, 0)
if err := sess.SQL(`SELECT i.name AS Name
FROM sys.indexes i INNER JOIN sys.index_columns ic
ON i.index_id = ic.index_id AND i.object_id = ic.object_id
INNER JOIN sys.tables AS t
ON t.object_id = i.object_id
INNER JOIN sys.columns c
ON t.object_id = c.object_id AND ic.column_id = c.column_id
WHERE t.name = 'language_stat' AND c.name = 'language'`).Find(&constraints); err != nil {
return fmt.Errorf("Find constraints: %v", err)
}
for _, constraint := range constraints {
if _, err := sess.Exec(fmt.Sprintf("DROP INDEX [%s] ON `language_stat`", constraint)); err != nil {
return fmt.Errorf("Drop table `language_stat` constraint `%s`: %v", constraint, err)
}
}
if _, err := sess.Exec(fmt.Sprintf("ALTER TABLE language_stat ALTER COLUMN language %s", sqlType)); err != nil { if _, err := sess.Exec(fmt.Sprintf("ALTER TABLE language_stat ALTER COLUMN language %s", sqlType)); err != nil {
return err return err
} }
// Finally restore the constraint
if err := sess.CreateUniques(new(LanguageStat)); err != nil {
return err
}
case setting.Database.UsePostgreSQL: case setting.Database.UsePostgreSQL:
if _, err := sess.Exec(fmt.Sprintf("ALTER TABLE language_stat ALTER COLUMN language TYPE %s", sqlType)); err != nil { if _, err := sess.Exec(fmt.Sprintf("ALTER TABLE language_stat ALTER COLUMN language TYPE %s", sqlType)); err != nil {
return err return err