Q:Update Rule - Mailing list pgsql-sql

From Detlef Boddin S/N O.21
Subject Q:Update Rule
Date
Msg-id 360623CF.DD9A03E1@teleport.de
Whole thread Raw
List pgsql-sql
 I want  to save the user and date in a row when the user changed it.
If I use an update rule, how can I prevent a loop ?

Bad example:

create rule  r_changed
    as on update to requesttable
    do update requesttable
        set changed_by = current_user,
               date_of_last_change = current_date;


What is better ?


Detlef




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