From: | "Pavel Stehule" <pavel(dot)stehule(at)gmail(dot)com> |
---|---|
To: | "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | "Marcin Krawczyk" <jankes(dot)mk(at)gmail(dot)com>, pgsql-sql(at)postgresql(dot)org |
Subject: | Re: array variables |
Date: | 2008-11-13 13:47:05 |
Message-ID: | 162867790811130547h7d19aec3if6d8514244563e40@mail.gmail.com |
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Lists: | pgsql-sql |
2008/11/13 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>:
> "Pavel Stehule" <pavel(dot)stehule(at)gmail(dot)com> writes:
>> 2008/11/13 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>:
>>> Sure you can, if you're using a version new enough to have arrays of
>>> composite types.
>
>> I don't expect so user use devel version ;)
>
> My example was done in 8.3.
>
>> - and result is array of
>> some composite type, not two dimensional array
>
I tested it with error:
postgres=# create table f(a int, b int);
CREATE TABLE
postgres=# insert into f values(10,20);
INSERT 0 1
postgres=# select array(select row(a,b) from f);
ERROR: could not find array type for datatype record
postgres=# select version();
version
----------------------------------------------------------------------------------------------------
PostgreSQL 8.3.0 on i686-pc-linux-gnu, compiled by GCC gcc (GCC)
4.1.2 20070925 (Red Hat 4.1.2-33)
(1 row)
I forgot on casting, so I was confused.
Regards
Pavel Stehule
> Well, if the columns are of different types then you'll never be able to
> represent them as a 2-D array, so I thought this was a more general answer.
ok
>
> regards, tom lane
>
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