postgresql

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History

Tom Lane b663f3443b Add a bunch of pseudo-types to replace the behavior formerly associated with OPAQUE, as per recent pghackers discussion. I still want to do some more work on the 'cstring' pseudo-type, but I'm going to commit the bulk of the changes now before the tree starts shifting under me ...		2002-08-22 00:01:51 +00:00
..
Makefile
noup.c	Change made to elog:	2002-03-06 06:10:59 +00:00
noup.sql.in	Add a bunch of pseudo-types to replace the behavior formerly associated	2002-08-22 00:01:51 +00:00
README.noup

README.noup


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;