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From: Rajesh Kumar Mallah <mallah@trade-india.com>
To: pgsql-sql@postgresql.org
Subject: " Adding missing FROM-clause entry for table .... " problem.
Date: Tue, 18 Feb 2003 15:34:34 +0530
Message-ID: <200302181534.34822.mallah@trade-india.com> (raw)


Hi ,

We find that if we alias a tablename and refer to that tablename in where cluase instead of reffering
to the alias it produces wrond results.

EG:
select to_char(a.generated, 'DD/Mon/YYYY' ) ,userid,email,descr from membership_invoice a join payment_classes using(payment_class)
join users using(userid)  join membership_status using(userid) where  membership_invoice.status='a' and granted is false and 
membership_invoice.last_reminder is null and current_date - date(a.generated) > 4  limit 10 ;
NOTICE:  Adding missing FROM-clause entry for table "membership_invoice"
+-------------+--------+--------------------------+---------------+
|   to_char   | userid |          email           |     descr     |
+-------------+--------+--------------------------+---------------+
| 23/Nov/2002 |  34886 | pradeepk@trade-india.com | IID TradePass |
| 23/Nov/2002 |  34886 | pradeepk@trade-india.com | IID TradePass |
| 23/Nov/2002 |  34886 | pradeepk@trade-india.com | IID TradePass |
| 23/Nov/2002 |  34886 | pradeepk@trade-india.com | IID TradePass |
| 23/Nov/2002 |  34886 | pradeepk@trade-india.com | IID TradePass |
| 23/Nov/2002 |  34886 | pradeepk@trade-india.com | IID TradePass |
| 23/Nov/2002 |  34886 | pradeepk@trade-india.com | IID TradePass |
| 23/Nov/2002 |  34886 | pradeepk@trade-india.com | IID TradePass |
| 23/Nov/2002 |  34886 | pradeepk@trade-india.com | IID TradePass |
| 23/Nov/2002 |  34886 | pradeepk@trade-india.com | IID TradePass |
+-------------+--------+--------------------------+---------------+

Where as merely rewriting the quer to use defined aliases gives the correct results.

select to_char(a.generated, 'DD/Mon/YYYY' ) ,userid,email,descr from membership_invoice a join payment_classes 
using(payment_class) join users using(userid)  join membership_status using(userid) where  a.status='a' and granted is 
false and a.last_reminder is null and current_date - date(a.generated) > 4   ;
+-------------+--------+--------------------------------+------------------------+
|   to_char   | userid |             email              |         descr          |
+-------------+--------+--------------------------------+------------------------+
| 12/Feb/2003 | 125182 | blackandwhitetextile@yahoo.com | Mini Silver MemberShip |
| 13/Feb/2003 | 117512 | vaishnavipower@vsnl.net        | Mini Silver MemberShip |
+-------------+--------+--------------------------------+------------------------+
(2 rows)


Can Anyone please explain if its a BUG for problem in my
understanding 


Regds
Mallah.





-- 

Regds
Mallah

----------------------------------------
Rajesh Kumar Mallah,
Project Manager (Development)
Infocom Network Limited, New Delhi
phone: +91(11)6152172 (221) (L) ,9811255597 (M)

Visit http://www.trade-india.com ,
India's Leading B2B eMarketplace.



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