Available in versions: Dev (3.20) | Latest (3.19) | 3.18 | 3.17 | 3.16 | 3.15

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, and emulated using an anonymous, procedural block if possible.

// Drop a trigger
create.dropTriggerIfExists("trg").execute();

Dialect support

This example using jOOQ:

dropTriggerIfExists("type")

Translates to the following dialect specific expressions:

DB2

BEGIN
  DECLARE CONTINUE HANDLER FOR SQLSTATE '42704' BEGIN END;
  EXECUTE IMMEDIATE '
    DROP TRIGGER type
  ';
END

Firebird

EXECUTE BLOCK
AS
BEGIN
  EXECUTE STATEMENT '
    DROP TRIGGER type
  ';
  WHEN sqlcode -607 DO
    BEGIN END
END

Informix, MariaDB, MySQL, Oracle, SQLServer

DROP TRIGGER IF EXISTS type

Postgres

DO $$
BEGIN
  DROP TRIGGER IF EXISTS type;
  DROP FUNCTION IF EXISTS type_function;
END;
$$

ASE, Access, Aurora MySQL, Aurora Postgres, BigQuery, CockroachDB, Derby, DuckDB, Exasol, H2, HSQLDB, Hana, MemSQL, Redshift, SQLDataWarehouse, SQLite, Snowflake, Sybase, Teradata, Trino, Vertica, YugabyteDB

/* UNSUPPORTED */

(These are currently generated with jOOQ 3.20, see #10141), or translate your own on our website

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