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[CHORE] Remove Microsoft SQL Server Support

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- Per https://codeberg.org/forgejo/discussions/issues/122
This commit is contained in:
Gusted 2024-04-04 18:02:24 +02:00
parent af47c583b4
commit 2d9afd0c21
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GPG key ID: FD821B732837125F
70 changed files with 70 additions and 789 deletions
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33
models/db/collation.go
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@ -41,20 +41,6 @@ func findAvailableCollationsMySQL(x *xorm.Engine) (ret container.Set[string], er
return ret, nil
}
func findAvailableCollationsMSSQL(x *xorm.Engine) (ret container.Set[string], err error) {
var res []struct {
Name string
}
if err = x.SQL("SELECT * FROM sys.fn_helpcollations() WHERE name LIKE '%[_]CS[_]AS%'").Find(&res); err != nil {
return nil, err
}
ret = make(container.Set[string], len(res))
for _, r := range res {
ret.Add(r.Name)
}
return ret, nil
}
func CheckCollations(x *xorm.Engine) (*CheckCollationsResult, error) {
dbTables, err := x.DBMetas()
if err != nil {
@ -84,18 +70,6 @@ func CheckCollations(x *xorm.Engine) (*CheckCollationsResult, error) {
// At the moment, it's safe to ignore the database difference, just trim the prefix and compare. It could be fixed easily if there is any problem in the future.
return a == b || strings.TrimPrefix(a, "utf8mb4_") == strings.TrimPrefix(b, "utf8mb4_")
}
} else if x.Dialect().URI().DBType == schemas.MSSQL {
if _, err = x.SQL("SELECT DATABASEPROPERTYEX(DB_NAME(), 'Collation')").Get(&res.DatabaseCollation); err != nil {
return nil, err
}
res.IsCollationCaseSensitive = func(s string) bool {
return strings.HasSuffix(s, "_CS_AS")
}
candidateCollations = []string{"Latin1_General_CS_AS"}
res.AvailableCollation, err = findAvailableCollationsMSSQL(x)
if err != nil {
return nil, err
}
} else {
return nil, nil
}
@ -146,10 +120,6 @@ func alterDatabaseCollation(x *xorm.Engine, collation string) error {
if x.Dialect().URI().DBType == schemas.MYSQL {
_, err := x.Exec("ALTER DATABASE CHARACTER SET utf8mb4 COLLATE " + collation)
return err
} else if x.Dialect().URI().DBType == schemas.MSSQL {
// TODO: MSSQL has many limitations on changing database collation, it could fail in many cases.
_, err := x.Exec("ALTER DATABASE CURRENT COLLATE " + collation)
return err
}
return errors.New("unsupported database type")
}
@ -165,12 +135,11 @@ func preprocessDatabaseCollation(x *xorm.Engine) {
}
// try to alter database collation to expected if the database is empty, it might fail in some cases (and it isn't necessary to succeed)
// at the moment, there is no "altering" solution for MSSQL, site admin should manually change the database collation
// at the moment.
if !r.CollationEquals(r.DatabaseCollation, r.ExpectedCollation) && r.ExistingTableNumber == 0 {
if err = alterDatabaseCollation(x, r.ExpectedCollation); err != nil {
log.Error("Failed to change database collation to %q: %v", r.ExpectedCollation, err)
} else {
_, _ = x.Exec("SELECT 1") // after "altering", MSSQL's session becomes invalid, so make a simple query to "refresh" the session
if r, err = CheckCollations(x); err != nil {
log.Error("Failed to check database collation again after altering: %v", err) // impossible case
return