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The TRUNCATE statement

Applies to ✅ Open Source Edition   ✅ Express Edition   ✅ Professional Edition   ✅ Enterprise Edition

Even if the TRUNCATE statement mainly modifies data, it is generally considered to be a DDL statement. It is popular in many databases when you want to bypass constraints for table truncation. Databases may behave differently, when a truncated table is referenced by other tables. For instance, they may fail if records from a truncated table are referenced, even with ON DELETE CASCADE clauses in place. Please, consider your database manual to learn more about its TRUNCATE implementation.

The TRUNCATE syntax is trivial:

create.truncate(AUTHOR).execute();

TRUNCATE is not supported by all dialects. jOOQ will execute a DELETE FROM AUTHOR statement instead, which is roughly equivalent.

Dialect support

This example using jOOQ:

truncate(AUTHOR)

Translates to the following dialect specific expressions:

Access, Firebird, SQLite, Teradata

DELETE FROM AUTHOR

ASE, Aurora MySQL, Aurora Postgres, BigQuery, CockroachDB, Derby, DuckDB, Exasol, H2, HSQLDB, Hana, Informix, MariaDB, MemSQL, MySQL, Oracle, Postgres, Redshift, SQLDataWarehouse, SQLServer, Snowflake, Sybase, Trino, Vertica, YugabyteDB

TRUNCATE TABLE AUTHOR

DB2

TRUNCATE TABLE AUTHOR IMMEDIATE

(These are currently generated with jOOQ 3.20, see #10141), or translate your own on our website

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