Re: Selecting newly added column returns empty but only when selecting with other columns in table

From: Melvin Davidson <melvin6925(at)gmail(dot)com>
To: mrtruji <mrtruji(at)gmail(dot)com>
Cc: "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org>
Subject: Re: Selecting newly added column returns empty but only when selecting with other columns in table
Date: 2015-11-27 01:39:49
Message-ID: CANu8Fiwd3FmU4BJDmrBUb4HsdFBHTWVaReKFwJK2A4QJ4z-TUA@mail.gmail.com
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Is it possible you have more than one row where state = 'CA'? Putting a
LIMIT 1 would then restrict to only 1 row.
Have you tried with no limit? IE: SELECT new_col FROM data;

On Thu, Nov 26, 2015 at 7:13 PM, mrtruji <mrtruji(at)gmail(dot)com> wrote:

> Just added a new bytea type column to an existing psql table and populated
> the column entirely with row data. Running into some strange query results:
>
> When I select the newly added column by itself I get all the data as
> expected:
>
> SELECT new_col FROM data LIMIT 1;
> Result: \x8481e7dec3650040b....
>
> When I try to filter with 'where' on another column in the table, I get
> the values from the other columns as expected but empty from my new_column:
>
> SELECT id, state, new_col FROM data WHERE state='CA' limit 1;
> Result: 123456_1; CA; EMPTY ROW
>
> The reverse is also true. If I select my new column in combination with
> other columns with no 'where' I get the correct value from my new column
> but empty for the other columns:
>
> SELECT id, state, new_col FROM data limit 1;
> Result: EMPTY ROW; EMPTY ROW; \x8481e7dec3650040b....
>
> Thanks to anyone with advice!
>

--
*Melvin Davidson*
I reserve the right to fantasize. Whether or not you
wish to share my fantasy is entirely up to you.

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