Search Postgresql Archives

Re: obtaining ARRAY position for a given match

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Pedro Doria Meunier wrote:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi,

I'm trying to get the array position for a given match as thus:

This gets me the record for a given match:
SELECT *  FROM garmin_units WHERE 'L' = ANY (protocol_tag);

Ok. so far so good...
But what about getting the array position at which 'L' is stored?

Searching the Postgresql docs gives me no answer... :(
Am I on a wild goose chase?

Any insight highly appreciated ;)

BR,
Pedro Doria Meunier.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (GNU/Linux)
Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org/

iEYEARECAAYFAksFP6IACgkQ2FH5GXCfxAuasgCgu/d68fkg16r1OF/2QSLnmwhW
gjYAniyQ1Mn/72323NSznxgakF4dn98k
=tWbI
-----END PGP SIGNATURE-----

I wrote this a while ago. If you are on 8.4 use unnest instead. And if you are searching thru really big arrays, use plpgsql so you can terminate when you find a match.

CREATE OR REPLACE FUNCTION idx(text[], text)
RETURNS int AS
$$
SELECT MIN(CASE WHEN $1[i] = $2 THEN i
ELSE NULL END)::int
FROM generate_series(array_lower($1, 1),
array_upper($1, 1)) i;
$$
LANGUAGE 'sql' IMMUTABLE STRICT;

--
Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Postgresql Jobs]     [Postgresql Admin]     [Postgresql Performance]     [Linux Clusters]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Postgresql & PHP]     [Yosemite]
  Powered by Linux