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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 database
create.dropDatabaseIfExists("database").execute();

Dialect support

This example using jOOQ:

dropDatabaseIfExists("database")

Translates to the following dialect specific expressions:

Aurora Postgres, CockroachDB, MariaDB, MemSQL, MySQL, Postgres, YugabyteDB

DROP DATABASE IF EXISTS database

SQLDataWarehouse

BEGIN TRY
  DROP DATABASE database
END TRY
BEGIN CATCH
  IF error_number() != 2714 BEGIN
    DECLARE @ErrorMessage NVARCHAR(4000) = ERROR_MESSAGE();
    DECLARE @ErrorSeverity INT = ERROR_SEVERITY();
    DECLARE @ErrorState INT = ERROR_STATE();
    RAISERROR (@ErrorMessage, @ErrorSeverity, @ErrorState);
  END;
END CATCH

SQLServer

BEGIN TRY
  DROP DATABASE database
END TRY
BEGIN CATCH
  IF error_number() != 2714 THROW;
END CATCH

ASE, Access, Aurora MySQL, BigQuery, DB2, Derby, DuckDB, Exasol, Firebird, H2, HSQLDB, Hana, Informix, Oracle, Redshift, SQLite, Snowflake, Sybase, Teradata, Trino, Vertica

/* UNSUPPORTED */

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

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