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Re: Aliased table names ...oddity?

From: "Obe, Regina DND\\MIS" <robe(dot)dnd(at)cityofboston(dot)gov>
To: PostGreSQL <pgsql-novice(at)postgresql(dot)org>
Subject: Re: Aliased table names ...oddity?
Date: 2005-06-30 12:08:55
Message-ID: B318FD8D29DCD411BD0500D0B7A91C67041040AD@jupiter (view raw, whole thread or download thread mbox)
Lists: pgsql-novice
Yes - in the postgresql.conf there is an "add_missing_from" option - change
that to false.  I think by default it is on, and in future versions they are
planning to set that to false.

-----Original Message-----
From: Steve Tucknott [mailto:steve(at)retsol(dot)co(dot)uk] 
Sent: Thursday, June 30, 2005 2:55 AM
To: PostGreSQL
Subject: [NOVICE] Aliased table names ...oddity?


I don't know whether this is a 'bug' (it seems like designed behaviour)
- but if you do:
SELECT markUp.*
FROM markUp AS mark
     JOIN clientBranch AS clntB
     ON   mark.foreignRecNo      = clntB.clientRecNo
     AND  clntB.recNo            = 2
WHERE mark.serviceCoBranchRecNo  = 2
AND   mark.foreignTableName      = 'client'

So the table has an ALIAS that is ignored in the SELECT clause, then the
WHERE clause is 'ignored' and all rows from the table are returned.
Obviously its a typo in the original SQL - (but one that's very difficult to
pick up unless the data returned is obviously outside limits). Running the
SQL in PSQL, it seems that a FROM clause is automatically appended for the
missing 'markUp' table - so it does seem that this is intentional. Is there
a way to have this 'rejected' as an error - ie selecting from a table not
included in the query? 



Steve Tucknott
ReTSol Ltd

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MOBILE	07736715772

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Subject: Re: Aliased table names ...oddity?
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