Remote any references to sqlite (#16980)

* Remote any references to sqlite

* Fix specs

store/sqlstore/store.go

@@ -73,10 +73,6 @@ const (
 	ExitRemoveIndexMySQL         = 122
 	ExitRemoveIndexMissing       = 123
 	ExitRemoveTable              = 134
-	ExitCreateIndexSqlite        = 135
-	ExitRemoveIndexSqlite        = 136
-	ExitTableExists_SQLITE       = 137
-	ExitDoesColumnExistsSqlite   = 138
 	ExitAlterPrimaryKey          = 139
 )
 
@@ -274,9 +270,7 @@ func setupConnection(con_type string, dataSource string, settings *model.SqlSett
 
 	connectionTimeout := time.Duration(*settings.QueryTimeout) * time.Second
 
-	if *settings.DriverName == model.DATABASE_DRIVER_SQLITE {
-		dbmap = &gorp.DbMap{Db: db, TypeConverter: mattermConverter{}, Dialect: gorp.SqliteDialect{}, QueryTimeout: connectionTimeout}
-	} else if *settings.DriverName == model.DATABASE_DRIVER_MYSQL {
+	if *settings.DriverName == model.DATABASE_DRIVER_MYSQL {
 		dbmap = &gorp.DbMap{Db: db, TypeConverter: mattermConverter{}, Dialect: gorp.MySQLDialect{Engine: "InnoDB", Encoding: "UTF8MB4"}, QueryTimeout: connectionTimeout}
 	} else if *settings.DriverName == model.DATABASE_DRIVER_POSTGRES {
 		dbmap = &gorp.DbMap{Db: db, TypeConverter: mattermConverter{}, Dialect: gorp.PostgresDialect{}, QueryTimeout: connectionTimeout}
@@ -341,8 +335,6 @@ func (ss *SqlStore) GetDbVersion(numerical bool) (string, error) {
 		}
 	} else if ss.DriverName() == model.DATABASE_DRIVER_MYSQL {
 		sqlVersion = `SELECT version()`
-	} else if ss.DriverName() == model.DATABASE_DRIVER_SQLITE {
-		sqlVersion = `SELECT sqlite_version()`
 	} else {
 		return "", errors.New("Not supported driver")
 	}
@@ -468,20 +460,6 @@ func (ss *SqlStore) DoesTableExist(tableName string) bool {
 
 		return count > 0
 
-	} else if ss.DriverName() == model.DATABASE_DRIVER_SQLITE {
-		count, err := ss.GetMaster().SelectInt(
-			`SELECT count(name) FROM sqlite_master WHERE type='table' AND name=?`,
-			tableName,
-		)
-
-		if err != nil {
-			mlog.Critical("Failed to check if table exists", mlog.Err(err))
-			time.Sleep(time.Second)
-			os.Exit(ExitTableExists_SQLITE)
-		}
-
-		return count > 0
-
 	} else {
 		mlog.Critical("Failed to check if column exists because of missing driver")
 		time.Sleep(time.Second)
@@ -537,21 +515,6 @@ func (ss *SqlStore) DoesColumnExist(tableName string, columnName string) bool {
 
 		return count > 0
 
-	} else if ss.DriverName() == model.DATABASE_DRIVER_SQLITE {
-		count, err := ss.GetMaster().SelectInt(
-			`SELECT COUNT(*) FROM pragma_table_info(?) WHERE name=?`,
-			tableName,
-			columnName,
-		)
-
-		if err != nil {
-			mlog.Critical("Failed to check if column exists", mlog.Err(err))
-			time.Sleep(time.Second)
-			os.Exit(ExitDoesColumnExistsSqlite)
-		}
-
-		return count > 0
-
 	} else {
 		mlog.Critical("Failed to check if column exists because of missing driver")
 		time.Sleep(time.Second)
@@ -791,10 +754,6 @@ func (ss *SqlStore) AlterColumnDefaultIfExists(tableName string, columnName stri
 		tableName = strings.ToLower(tableName)
 		columnName = strings.ToLower(columnName)
 		defaultValue = *postgresColDefault
-	} else if ss.DriverName() == model.DATABASE_DRIVER_SQLITE {
-		// SQLite doesn't support altering column defaults, but we don't use this in
-		// production so just ignore.
-		return true
 	} else {
 		mlog.Critical("Failed to alter column default because of missing driver")
 		time.Sleep(time.Second)
@@ -850,9 +809,6 @@ func (ss *SqlStore) AlterPrimaryKey(tableName string, columnNames []string) bool
 			c.contype = 'p'
 		AND c.conrelid = '` + strings.ToLower(tableName) + `'::REGCLASS`
 		currentPrimaryKey, err = ss.GetMaster().SelectStr(query)
-	case model.DATABASE_DRIVER_SQLITE:
-		// SQLite doesn't support altering primary key
-		return true
 	}
 	if err != nil {
 		mlog.Critical("Failed to get current primary key", mlog.String("table", tableName), mlog.Err(err))
@@ -957,13 +913,6 @@ func (ss *SqlStore) createIndexIfNotExists(indexName string, tableName string, c
 			time.Sleep(time.Second)
 			os.Exit(ExitCreateIndexFullMySQL)
 		}
-	} else if ss.DriverName() == model.DATABASE_DRIVER_SQLITE {
-		_, err := ss.GetMaster().ExecNoTimeout("CREATE INDEX IF NOT EXISTS " + indexName + " ON " + tableName + " (" + strings.Join(columnNames, ", ") + ")")
-		if err != nil {
-			mlog.Critical("Failed to create index", mlog.Err(err))
-			time.Sleep(time.Second)
-			os.Exit(ExitCreateIndexSqlite)
-		}
 	} else {
 		mlog.Critical("Failed to create index because of missing driver")
 		time.Sleep(time.Second)
@@ -1009,13 +958,6 @@ func (ss *SqlStore) RemoveIndexIfExists(indexName string, tableName string) bool
 			time.Sleep(time.Second)
 			os.Exit(ExitRemoveIndexMySQL)
 		}
-	} else if ss.DriverName() == model.DATABASE_DRIVER_SQLITE {
-		_, err := ss.GetMaster().ExecNoTimeout("DROP INDEX IF EXISTS " + indexName)
-		if err != nil {
-			mlog.Critical("Failed to remove index", mlog.Err(err))
-			time.Sleep(time.Second)
-			os.Exit(ExitRemoveIndexSqlite)
-		}
 	} else {
 		mlog.Critical("Failed to create index because of missing driver")
 		time.Sleep(time.Second)