Trigger with conditional predicates

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От Dirk Mika
Тема Trigger with conditional predicates
Дата
Msg-id A4A3D4D4-B8C9-4ED2-B10D-0A908D639F99@mikatiming.de
обсуждение исходный текст
Ответы Re: Trigger with conditional predicates  (Christophe Pettus <xof@thebuild.com>)
Re: Trigger with conditional predicates  (Alban Hertroys <haramrae@gmail.com>)
Список pgsql-general
Hi all and a happy new Year!

We have an Oracle schema that is to be converted to PostgreSQL, where conditional predicates are used in some
triggers.

In particular, columns are populated with values if they are not specified in the update statement which is used.
Usually with an expression like this:

      IF NOT UPDATING('IS_CANCELED')
      THEN
         :new.is_canceled := ...;
      END IF;

I have not found anything similar in PostgreSQL. What is the common approach to this problem?

BR
Dirk


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