RE: Help with UPDATE syntax

Try eliminating the statement " from user_group_map map". It does not belong in the update. Here is the fully rewritten statement:

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(at)mxim(dot)com]
Sent: Wednesday, March 14, 2001 11:47 PM
To: pgsql-sql(at)postgresql(dot)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_id and
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 of transaction block

As noted earlier, any guidance will be most appreciated.

Thanks,

Jeff.

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TIP 4: Don't 'kill -9' the postmaster