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* Determining Inheritance
@ 2003-10-01 09:51 Gordon Ross <G.Ross@ccw.gov.uk>
2003-10-01 14:26 ` Re: Determining Inheritance Tom Lane <tgl@sss.pgh.pa.us>
0 siblings, 1 reply; 2+ messages in thread
From: Gordon Ross @ 2003-10-01 09:51 UTC (permalink / raw)
To: pgsql-sql
Is there any way to determine which table a row belows to, if I do a
search on the top level table:
e.g. I have a table called "BASE". There are two tables which inherit
from "BASE" called "SUBTABLE1" and "SUBTABLE2"
If I do a SELECT * FROM BASE WHERE blah; how can I tell which table
(either SUBTABLE1 or SUBTABLE2) a row comes from ?
Do I need to add an extra column to BASE to specify which table a row
really belongs to ?
(If it helps or hinders, I am ultimately going to be doing this via
JDBC)
Thanks,
GTG
Gordon Ross,
Network Manager/Rheolwr Rhydwaith
Countryside Council for Wales/Cyngor Cefn Gwlad Cymru
^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: Determining Inheritance
2003-10-01 09:51 Determining Inheritance Gordon Ross <G.Ross@ccw.gov.uk>
@ 2003-10-01 14:26 ` Tom Lane <tgl@sss.pgh.pa.us>
0 siblings, 0 replies; 2+ messages in thread
From: Tom Lane @ 2003-10-01 14:26 UTC (permalink / raw)
To: Gordon Ross <G.Ross@ccw.gov.uk>; +Cc: pgsql-sql
"Gordon Ross" <G.Ross@ccw.gov.uk> writes:
> Is there any way to determine which table a row belows to, if I do a
> search on the top level table:
Look at the built-in column "tableoid". You can join this to
pg_class.oid to retrieve the table name.
regards, tom lane
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2003-10-01 09:51 Determining Inheritance Gordon Ross <G.Ross@ccw.gov.uk>
2003-10-01 14:26 ` Tom Lane <tgl@sss.pgh.pa.us>
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