On Mon, Jan 31, 2011 at 6:42 AM, Naoya Anzai
<anzai-na...@mxu.nes.nec.co.jp> wrote:
> In PostgreSQL8.4.5, I found that the catalog pg_attribute.attinhcount is not
> correct.
>
> I executed the following queries.
>
> --------------------------------------------------------------------------
> create table "3_grandchild"();
> create table "2_child"();
> create table "1_parent"();
>
> alter table "3_grandchild" inherit "2_child";
> alter table "2_child" inherit "1_parent";
>
> alter table "3_grandchild" add column c1 text;
> alter table "2_child" add column c1 text;
> alter table "1_parent" add column c1 text;
>
> select c.relname,a.attname,a.attinhcount from pg_attribute a,pg_class c
> where a.attrelid=c.oid
> and relname in ('1_parent','2_child','3_grandchild')
> and attname not in('xmax','xmin','cmin','cmax','tableoid','ctid')
> order by relname;
>
> relname | attname | attinhcount
> --------------+---------+-------------
> 1_parent | c1 | 0
> 2_child | c1 | 1
> 3_grandchild | c1 | 2
> (3 rows)
> --------------------------------------------------------------------------
>
> "3_grandchild"'s attinhcount should be 1.
I think this is a manifestation the same problem mentioned here:
http://git.postgresql.org/gitweb?p=postgresql.git;a=commit;h=31b6fc06d83c6de3644c8f2921eb7de0eb92fac3
I believe this requires some refactoring to fix. It would be good to do that.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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