The updating of array fields is broken in Postgres95-1.01, An array can
be only replaced with a new array but not have some elements modified.
This is caused by two bugs in the parser and in the array utilities.
Furthermore it is not possible to update array with a base type of
variable length.
- submitted by: Massimo Dal Zotto <dz@cs.unitn.it>
I have written some patches which add support for NULLs to Postgres95.
In fact support for NULLs was already present in postgres, but it had been
disabled because not completely debugged, I believe. My patches simply add
some checks here and there. To enable the new code you must add -DNULL_PATCH
to CFLAGS in Makefile.global. After recompiling you can do things like:
insert into a (x, y) values (1, NULL);
update a set x = NULL where x = 0;
You can't still use a "where x=NULL" clause, you must use ISNULL instead.
This could probably be an easy fix to do.
Submitted by: Massimo Dal Zotto <dz@cs.unitn.it>
Marc G. Fournier