Re: Is there any easy way to determine a default value specified for table column? - Mailing list pgsql-general

From Thomas Kellerer
Subject Re: Is there any easy way to determine a default value specified for table column?
Date
Msg-id hnjb8s$obs$1@dough.gmane.org
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In response to Is there any easy way to determine a default value specified for table column?  (Belka Lambda <lambda-belka@yandex.ru>)
Responses Re: Re: Is there any easy way to determine a default value specified for table column?  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-general
Belka Lambda wrote on 14.03.2010 01:24:
> Hi everyone!
>
> Is there a way to "nicely" determine a default value of a table column? A function, which could be used, like:

The defaults are store in pg_attrdef, the corresponding column definitions in pg_attribute.

So you would need to do a join between the two tables, something like:

select c.relname, a.attname, def.adsrc
from pg_attrdef def
   join pg_class c on def.adrelid = c.oid
   join pg_attribute a on a.attrelid = c.oid and a.attnum = def.adnum
where c.relname = 'the_table_name'

Thomas



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