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ALTER TABLE .. DROP CONSTRAINT
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
A constraint can be dropped from the table using the ALTER TABLE's DROP CONSTRAINT clause:
// Drop a constraint
create.alterTable("table").dropConstraint("uk").execute();
Alternative syntaxes are available to restrict dropping only to specific types of constraints:
Dialect support
This example using jOOQ:
alterTable("t").dropConstraint("c")
Translates to the following dialect specific expressions:
ASE, Access, Aurora Postgres, CockroachDB, DB2, Derby, Exasol, Firebird, H2, HSQLDB, Hana, Informix, MariaDB, Oracle, Postgres, Redshift, SQLDataWarehouse, SQLServer, Snowflake, Sybase, Teradata, Vertica, YugabyteDB
ALTER TABLE t DROP CONSTRAINT c
BigQuery, ClickHouse
ALTER TABLE t DROP PRIMARY KEY
Aurora MySQL, DuckDB, MemSQL, MySQL, SQLite, Trino
/* UNSUPPORTED */
Generated with jOOQ 3.20. Translate your own SQL on our website
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