Skip site navigation (1) Skip section navigation (2)

Re: Polymorphic arguments and composite types

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Jeff Davis <pgsql(at)j-davis(dot)com>
Cc: Simon Riggs <simon(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Polymorphic arguments and composite types
Date: 2007-10-05 16:29:59
Message-ID: 25124.1191601799@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Jeff Davis <pgsql(at)j-davis(dot)com> writes:
> You could do something like:
> SELECT * FROM c AS c1, c AS c2 WHERE ARRAY[c1.col1] <@ ANY(SELECT c2.col2);

Good point --- actually he could convert it back to the original
subselect style, as long as he's using the correct operator:

SELECT * FROM c WHERE ARRAY[col1] <@ ANY(SELECT col2 FROM c);

The one-element-array trick seems a bit awkward though.  I wonder
why we don't have an "anyelement <@ anyarray" kind of operator...

			regards, tom lane

In response to

Responses

pgsql-hackers by date

Next:From: Jeff DavisDate: 2007-10-05 16:46:34
Subject: Re: Polymorphic arguments and composite types
Previous:From: Jeff DavisDate: 2007-10-05 16:17:10
Subject: Re: Polymorphic arguments and composite types

Privacy Policy | About PostgreSQL
Copyright © 1996-2014 The PostgreSQL Global Development Group