Re: rule creating infinite recursion not sure why - Mailing list pgsql-general

Gene <genekhart@gmail.com> schrieb:

> I was trying to create a rule to set a column to false whenever another column
> was changed:
>
> CREATE RULE...
> ON UPDATE TO criterion
>    WHERE new.pattern::text <> old.pattern::text DO UPDATE table SET flag =
> false
>   WHERE id = _o_l_d_._i_d
>
> pattern | id
> 12345  | 1
>
> => update criterion set pattern = '12345' where id = 1;
> ERROR:  infinite recursion detected in rules for relation "criterion"

I think, you should better use a TRIGGER and modify the NEW.flag within
the Trigger. Your solution creates a new UPDATE when an UPDATE occur.


Andreas
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