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ALTER TABLE .. ADD COLUMN IF NOT EXISTS
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
A popular subclause of DDL statements that jOOQ can usually emulate, is the IF EXISTS
clause:
Dialect support
This example using jOOQ:
alterTable("t").dropIfExists("c")
Translates to the following dialect specific expressions:
Aurora Postgres, CockroachDB, DuckDB, Exasol, H2, MariaDB, Postgres, Teradata, YugabyteDB
ALTER TABLE t DROP IF EXISTS c
BigQuery, ClickHouse, Databricks, Trino
ALTER TABLE t DROP COLUMN IF EXISTS c
DB2
BEGIN DECLARE CONTINUE HANDLER FOR SQLSTATE '42703' BEGIN END; DECLARE CONTINUE HANDLER FOR SQLSTATE '42704' BEGIN END; EXECUTE IMMEDIATE ' ALTER TABLE t DROP c '; END
Hana
DO BEGIN DECLARE EXIT HANDLER FOR SQL_ERROR_CODE 257 BEGIN END; DECLARE EXIT HANDLER FOR SQL_ERROR_CODE 260 BEGIN END; DECLARE EXIT HANDLER FOR SQL_ERROR_CODE 397 BEGIN END; EXECUTE IMMEDIATE ' ALTER TABLE t DROP (c) '; END;
Oracle
BEGIN EXECUTE IMMEDIATE ' ALTER TABLE t DROP COLUMN c '; EXCEPTION WHEN others THEN IF sqlerrm LIKE 'ORA-00904%' THEN NULL; ELSIF sqlerrm LIKE 'ORA-02443%' THEN NULL; ELSE RAISE; END IF; END;
SQLDataWarehouse
BEGIN TRY EXEC sp_executesql N' ALTER TABLE t DROP COLUMN c '; END TRY BEGIN CATCH IF error_number() != 4924 and error_number() != 3728 and error_number() != 3727 BEGIN DECLARE @ErrorMessage NVARCHAR(4000) = ERROR_MESSAGE(); DECLARE @ErrorSeverity INT = ERROR_SEVERITY(); DECLARE @ErrorState INT = ERROR_STATE(); RAISERROR (@ErrorMessage, @ErrorSeverity, @ErrorState); END; END CATCH
SQLServer
BEGIN TRY EXEC sp_executesql N' ALTER TABLE t DROP COLUMN c '; END TRY BEGIN CATCH IF error_number() != 4924 and error_number() != 3728 and error_number() != 3727 THROW; END CATCH
ASE, Access, Aurora MySQL, Derby, Firebird, HSQLDB, Informix, MemSQL, MySQL, Redshift, SQLite, Snowflake, Sybase, Vertica
/* UNSUPPORTED */
Generated with jOOQ 3.21. Support in older jOOQ versions may differ. Translate your own SQL on our website
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