ALTER DOMAIN .. DROP CONSTRAINT IF EXISTS
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
A popular subclause of DDL statements that jOOQ can usually emulate, is the IF EXISTS clause:
// Drop CHECK constraints from a domain
create.alterDomain("d").dropConstraintIfExists("c").execute();
Dialect support
This example using jOOQ:
alterDomain("d").dropConstraintIfExists("c")
Translates to the following dialect specific expressions:
Aurora Postgres, Postgres
ALTER DOMAIN d DROP CONSTRAINT IF EXISTS c
Firebird
EXECUTE BLOCK
AS
BEGIN
EXECUTE STATEMENT '
ALTER DOMAIN d DROP CONSTRAINT
';
WHEN sqlcode -607 DO
BEGIN END
END
ASE, Access, Aurora MySQL, BigQuery, ClickHouse, CockroachDB, DB2, Derby, DuckDB, Exasol, H2, HSQLDB, Hana, Informix, MariaDB, MemSQL, MySQL, Oracle, Redshift, SQLDataWarehouse, SQLServer, SQLite, Snowflake, Sybase, Teradata, Trino, Vertica, YugabyteDB
/* UNSUPPORTED */
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