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DROP TRIGGER 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, ClickHouse, 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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