Available in versions: Dev (3.19) | Latest (3.18) | 3.17 | 3.16 | 3.15 | 3.14 | 3.13 | 3.12 | 3.11 | 3.10 | 3.9
IF EXISTS
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
For idempotent execution of DDL scripts, the useful IF EXISTS clause is supported by jOOQ.
// Drop an index
create.dropIndexIfExists("index").execute();
Dialect support
This example using jOOQ:
dropIndexIfExists("index")
Translates to the following dialect specific expressions:
-- ACCESS
DROP INDEX index
-- AURORA_POSTGRES, COCKROACHDB, DUCKDB, H2, HSQLDB, INFORMIX, MARIADB, ORACLE, POSTGRES, SYBASE, YUGABYTEDB
DROP INDEX IF EXISTS index
-- DB2
BEGIN
DECLARE CONTINUE HANDLER FOR SQLSTATE '42704' BEGIN END;
EXECUTE IMMEDIATE '
DROP INDEX index
';
END
-- FIREBIRD
EXECUTE BLOCK
AS
BEGIN
EXECUTE STATEMENT '
DROP INDEX index
';
WHEN sqlcode -607 DO
BEGIN END
END
-- HANA
DO BEGIN
DECLARE EXIT HANDLER FOR SQL_ERROR_CODE 261 BEGIN END;
EXECUTE IMMEDIATE '
DROP INDEX index
';
END;
-- MYSQL
CREATE PROCEDURE block_1702641451036_2199457()
MODIFIES SQL DATA
BEGIN
DECLARE CONTINUE HANDLER FOR SQLSTATE '42000' BEGIN END;
DROP INDEX index;
END;
CALL block_1702641451036_2199457();
DROP PROCEDURE block_1702641451036_2199457;
-- SQLDATAWAREHOUSE
BEGIN TRY
DROP INDEX index
END TRY
BEGIN CATCH
IF error_number() != 3701 BEGIN
DECLARE @ErrorMessage NVARCHAR(4000) = ERROR_MESSAGE();
DECLARE @ErrorSeverity INT = ERROR_SEVERITY();
DECLARE @ErrorState INT = ERROR_STATE();
RAISERROR (@ErrorMessage, @ErrorSeverity, @ErrorState);
END;
END CATCH
-- SQLITE
DROP INDEX IF EXISTS "index"
-- SQLSERVER
BEGIN TRY
DROP INDEX index
END TRY
BEGIN CATCH
IF error_number() != 3701 THROW;
END CATCH
-- ASE, AURORA_MYSQL, BIGQUERY, DERBY, EXASOL, MEMSQL, REDSHIFT, SNOWFLAKE, TERADATA, TRINO, VERTICA
/* UNSUPPORTED */
(These are currently generated with jOOQ 3.19, see #10141), or translate your own on our website
Feedback
Do you have any feedback about this page? We'd love to hear it!