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DROP SCHEMA 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 schema
create.dropSchemaIfExists("schema").execute();

Dialect support

This example using jOOQ:

dropSchemaIfExists("schema")

Translates to the following dialect specific expressions:

Aurora Postgres, CockroachDB, DuckDB, Exasol, H2, HSQLDB, MariaDB, MemSQL, MySQL, Postgres, Redshift, Snowflake, Vertica, YugabyteDB

DROP SCHEMA IF EXISTS schema

ClickHouse

DROP DATABASE IF EXISTS schema

DB2

BEGIN
  DECLARE CONTINUE HANDLER FOR SQLSTATE '42704' BEGIN END;
  EXECUTE IMMEDIATE '
    DROP SCHEMA schema RESTRICT
  ';
END

Hana

DO BEGIN
  DECLARE EXIT HANDLER FOR SQL_ERROR_CODE 362 BEGIN END;
  EXECUTE IMMEDIATE '
    DROP SCHEMA schema
  ';
END;

Oracle

DROP USER IF EXISTS schema

SQLDataWarehouse

BEGIN TRY
  DROP SCHEMA schema
END TRY
BEGIN CATCH
  IF error_number() != 15151 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 SCHEMA schema
END TRY
BEGIN CATCH
  IF error_number() != 15151 THROW;
END CATCH

ASE, Access, Aurora MySQL, BigQuery, Derby, Firebird, Informix, SQLite, Sybase, Teradata, Trino

/* UNSUPPORTED */
Generated with jOOQ 3.20. Translate your own SQL on our website

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