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Columns view? (Finding column names for a table)
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* Columns view? (Finding column names for a table)
@ 2008-02-06 20:33 Steve Midgley <public@misuse.org>
  2008-02-06 20:43 ` Re: Columns view? (Finding column names for a table) Thomas Kellerer <spam_eater@gmx.net>
  0 siblings, 1 reply; 2+ messages in thread

From: Steve Midgley @ 2008-02-06 20:33 UTC (permalink / raw)
  To: pgsql-sql

Hi,

I see this documentation item but can't figure out how to use it:

http://www.postgresql.org/docs/8.2/interactive/infoschema-columns.html

>The view columns contains information about all table columns (or view 
>columns) in the database.

However, if I execute "select columns;" I get a not found error. I'm 
sure there's some simple explanation - I'm interested specifically in 
listing the column names of a specific table (in Pg 8.2). The manual 
SQL I've developed is (where [table_name] is the table I want columns 
for):

          select pg_attribute.attname, * from pg_attribute
           join pg_class on pg_class.oid = pg_attribute.attrelid
         where
           pg_class.relname = '[table_name]'
           and
           attnum > 0
           and atttypid > 0

Not pretty but seems to work. Of course if there were a view that 
encapsulated this and future-proofed it, that'd be much nicer.

Any assistance is appreciated! Thanks,

Steve




^ permalink  raw  reply  [nested|flat] 2+ messages in thread

* Re: Columns view? (Finding column names for a table)
  2008-02-06 20:33 Columns view? (Finding column names for a table) Steve Midgley <public@misuse.org>
@ 2008-02-06 20:43 ` Thomas Kellerer <spam_eater@gmx.net>
  0 siblings, 0 replies; 2+ messages in thread

From: Thomas Kellerer @ 2008-02-06 20:43 UTC (permalink / raw)
  To: pgsql-sql

Steve Midgley wrote on 06.02.2008 21:33:
> Hi,
> 
> I see this documentation item but can't figure out how to use it:
> 
> http://www.postgresql.org/docs/8.2/interactive/infoschema-columns.html
> 
>> The view columns contains information about all table columns (or view 
>> columns) in the database.

select column_name
from information_schema.columns
where table_name = 'table_name'

works for me.

Thomas





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2008-02-06 20:33 Columns view? (Finding column names for a table) Steve Midgley <public@misuse.org>
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