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 domain
create.dropDomainIfExists("d").execute();
Dialect support
This example using jOOQ:
dropDomainIfExists("d")
Translates to the following dialect specific expressions:
-- AURORA_POSTGRES, H2, HSQLDB, ORACLE, POSTGRES, YUGABYTEDB
DROP DOMAIN IF EXISTS d
-- FIREBIRD
EXECUTE BLOCK
AS
BEGIN
EXECUTE STATEMENT '
DROP DOMAIN d
';
WHEN sqlcode -607 DO
BEGIN END
END
-- SQLSERVER
DROP TYPE IF EXISTS d
-- ACCESS, ASE, AURORA_MYSQL, BIGQUERY, COCKROACHDB, DB2, DERBY, DUCKDB, EXASOL, HANA, INFORMIX, MARIADB, MEMSQL, MYSQL,
-- REDSHIFT, SNOWFLAKE, SQLDATAWAREHOUSE, SQLITE, SYBASE, TERADATA, TRINO, VERTICA
/* UNSUPPORTED */
(These are currently generated with jOOQ 3.19, see #10141), or translate your own on our website
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