noupdate
~~~~~~~~
- trigger to prevent updates on single columns.
Example:
~~~~~~~
CREATE TABLE TEST ( COL1 INT, COL2 INT, COL3 INT );
CREATE TRIGGER BT BEFORE UPDATE ON TEST FOR EACH ROW
EXECUTE PROCEDURE
noup ('COL1');
-- Now Try
INSERT INTO TEST VALUES (10,20,30);
UPDATE TEST SET COL1 = 5;