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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
-- ACCESS, ASE, AURORA_MYSQL, BIGQUERY, DB2, DERBY, DUCKDB, EXASOL, FIREBIRD, H2, HANA, HSQLDB, INFORMIX, ORACLE,
-- REDSHIFT, SNOWFLAKE, 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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