http://www.postgresql.org/idocs/index.php?trigger-manager.html
http://www.postgresql.org/idocs/index.php?plpgsql-trigger.html
TG_OP ?
C.
shreedhar wrote, On 12/26/2002 12:57 PM:
> Is there any eqvivalent or alternative to the following IF UPDATE(column) or
> IF(COLUMNS_UPDATED()) of SQLServer2000.
>
> IF UPDATE (column)
>
> Tests for an INSERT or UPDATE action to a specified column and is not used
> with DELETE operations. More than one column can be specified. Because the
> table name is specified in the ON clause, do not include the table name
> before the column name in an IF UPDATE clause. To test for an INSERT or
> UPDATE action for more than one column, specify a separate UPDATE(column)
> clause following the first one. IF UPDATE will return the TRUE value in
> INSERT actions because the columns have either explicit values or implicit
> (NULL) values inserted.
>
> IF (COLUMNS_UPDATED())
>
> Tests, in an INSERT or UPDATE trigger only, whether the mentioned column or
> columns were inserted or updated. COLUMNS_UPDATED returns a varbinary bit
> pattern that indicates which columns in the table were inserted or updated.
>
> Thanks And Regards,
>
> Sreedhar
