On Thu, 26 Mar 2009, Bolla Sandor wrote:
> In rare cases I need to put subselects right after 'SELECT' keyword in
> MySQL.
> e.g:
>
> select x,y,(select z from b where id = a.id) as _b from a ...
>
> is there any support planned for this case?
You can do that like this already:
$db = ezcDbInstance::get();
$q = $db->createSelectQuery();
$qs = $db->createSelectQuery();
$qs->select( 'z' )->from( 'b' )->where( $qs->expr->eq( 'id', 'a.id' ) );
$q->select( 'x', 'y', "($qs as _b)" )->from( 'a' );
echo $q->getQuery(), "\n";
> The original ezcQuerySelect->select() function could be enhanced to use
> ezcQuerySubSelect object.
> Needs class checking and getQuery functionality, maybe alias enhancement
> as well.
As for aliases, that's tricky to do... because the select query might
look different and I'd have no idea how to set up such an alias in a
nice way. If you have a good idea on how to implement that... we'd be
interested.
regards,
--
Derick Rethans
eZ components Product Manager
eZ systems | http://ez.no
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