Oracle trigger to SQL trigger

• leon.booij

  Ten Centuries

  Points: 1062

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  March 5, 2013 at 3:29 am

  #274825

  Hi,

  Got a Oracle script with a trigger in it and I want to have it as a SQL trigger script

  Can anyone help me with this

  CREATE OR REPLACE TRIGGER MESSAGES_INS BEFORE INSERT ON MESSAGES

  FOR EACH ROW

  BEGIN

  IF :NEW.id IS NULL THEN

  SELECT SEQ_MESSAGE_ID.nextval INTO :NEW.id FROM DUAL;

  END IF;

  END;

  /

  ALTER TRIGGER MESSAGES_INS ENABLE;

  Thanks

• Lowell

  SSC Guru

  Points: 323518

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  March 5, 2013 at 4:44 am

  #1593409

  That trigger emulates what a column with an identity does... so you can simply define the column as having an identity and skip the trigger completely.

  Create table tbname (colname int identity(1,1) not null.........

  Lowell

  ---

  --help us help you! If you post a question, make sure you include a CREATE TABLE... statement and INSERT INTO... statement into that table to give the volunteers here representative data. with your description of the problem, we can provide a tested, verifiable solution to your question! asking the question the right way gets you a tested answer the fastest way possible!

• TheSQLGuru

  SSC Guru

  Points: 134017

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  March 5, 2013 at 6:43 am

  #1593449

  Lowell (3/5/2013)

  ---

  That trigger emulates what a column with an identity does... so you can simply define the column as having an identity and skip the trigger completely.

  Create table tbname (colname int identity(1,1) not null.........

  Given that this is a SQL 2012 forum, the OP can also use the new SEQUENCE object, which could be the only feature that gives the exact same implementation. The Oracle sequence could well be something other than int from 1 to N increment by 1.

  Best,
  Kevin G. Boles
  SQL Server Consultant
  SQL MVP 2007-2012
  TheSQLGuru on googles mail service