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DROP SEQUENCE 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.

// Drop a sequence
create.dropSequenceIfExists("sequence").execute();

Dialect support

This example using jOOQ:

dropSequenceIfExists("sequence")

Translates to the following dialect specific expressions:

DROP SEQUENCE IF EXISTS  sequence

BEGIN
  DECLARE CONTINUE HANDLER FOR SQLSTATE '42704' BEGIN END;
  EXECUTE IMMEDIATE '
    DROP SEQUENCE  sequence
  ';
END

EXECUTE BLOCK
AS
BEGIN
  EXECUTE STATEMENT '
    DROP SEQUENCE  sequence
  ';
  WHEN sqlcode -607 DO
    BEGIN END
END

DO BEGIN
  DECLARE EXIT HANDLER FOR SQL_ERROR_CODE 313 BEGIN END;
  EXECUTE IMMEDIATE '
    DROP SEQUENCE  sequence
  ';
END;

BEGIN TRY
  DROP SEQUENCE  sequence
END TRY
BEGIN CATCH
  IF error_number() != 3701 THROW;
END CATCH

BEGIN
  DROP SEQUENCE  sequence;
EXCEPTION
  WHEN others THEN
END;

/* UNSUPPORTED */

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