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
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