DROP FUNCTION 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 function
create.dropFunctionIfExists("func").execute();
Dialect support
This example using jOOQ:
dropFunctionIfExists("func")
Translates to the following dialect specific expressions:
BigQuery, Exasol, HSQLDB, Informix, MariaDB, MySQL, Oracle, Postgres, SQLServer, Vertica, YugabyteDB
DROP FUNCTION IF EXISTS func
DB2
BEGIN
DECLARE CONTINUE HANDLER FOR SQLSTATE '42704' BEGIN END;
EXECUTE IMMEDIATE '
DROP FUNCTION func
';
END
Firebird
EXECUTE BLOCK
AS
BEGIN
EXECUTE STATEMENT '
DROP FUNCTION func
';
WHEN sqlcode -607 DO
BEGIN END
END
ASE, Access, Aurora MySQL, Aurora Postgres, ClickHouse, CockroachDB, Derby, DuckDB, H2, Hana, MemSQL, Redshift, SQLDataWarehouse, SQLite, Snowflake, Sybase, Teradata, Trino
/* UNSUPPORTED */
(These are currently generated with jOOQ 3.20, see #10141), or translate your own on our website
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