Try eliminating the statement " from user_group_map map". It does not belong in the update. Here is the fully
rewrittenstatement:
update user_group_map set user_id = 4 where user_id = 9 and not exists (
select * from user_group_map ug2 where user_id = 4
and ug2.group_id = map.group_id and ug2.role = map.role);
-----Original Message-----
From: Jeff Putsch [SMTP:putsch@mxim.com]
Sent: Wednesday, March 14, 2001 11:47 PM
To: pgsql-sql@postgresql.org
Subject: Help with UPDATE syntax
Howdy,
I am porting a bit of code from ORACLE to PostgreSQL 7.1 and am getting stuck on
an update statment. I am NOT a SQL expert, merely a beginner swimming hard,
so any help will be greatly appreciated. The specific query looks like this:
begin transaction
update user_group_map map set user_id = 4 where user_id = 9 not exists (
select * from user_group_map where user_id = 4 and group_id =
map.group_idand role = map.role )
commit
There are other updates taking place during the transaction, but this is the
one for which I can't figure out the PostgreSQL equivalent.
I've tried this:
update user_group_map set user_id = 4 from user_group_map map where user_id
=9 and not exists ( select * from user_group_map ug2 where
user_id = 4 and ug2.group_id = map.group_id and ug2.role =
map.role);
for the update replacement, but get an error: NOTICE: current transaction is aborted, queries ignored until end
oftransaction block
As noted earlier, any guidance will be most appreciated.
Thanks,
Jeff.
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TIP 4: Don't 'kill -9' the postmaster
