From: Leif Biberg Kristensen <leif@solumslekt.org>
To: postgresql <pgsql-sql@postgresql.org>
Subject: Re: Plpgsql: Iterating through a string of parameters
Date: Thu, 25 Mar 2010 17:00:25 +0100
Message-ID: <201003251700.25623.leif@solumslekt.org> (raw)
In-Reply-To: <201003251616.53097.leif@solumslekt.org>
References: <201003251616.53097.leif@solumslekt.org>
On Thursday 25. March 2010 16.16.53 Leif Biberg Kristensen wrote:
> I'm struggling with how to make plpgsql iterate through a list of numbers
> input as a text string, eg. "1438 2656 973 4208". I figure that I can use the
> regexp_split_to_array() function to make an array of the string, but can I
> iterate through an array with eg. a FOR loop?
I found a solution myself through trial-and-error:
CREATE OR REPLACE FUNCTION text_to_arr(TEXT) RETURNS VOID AS $$
DECLARE
arr TEXT ARRAY;
BEGIN
arr := regexp_split_to_array($1, E'\\s+');
FOR i IN 1..array_length(arr, 1) LOOP
RAISE NOTICE '%', arr[i]::INTEGER;
END LOOP;
RETURN;
END
$$ LANGUAGE plpgsql IMMUTABLE;
pgslekt=> select * from text_to_arr('1438 2607 1504');
NOTICE: 1438
NOTICE: 2607
NOTICE: 1504
text_to_arr
-------------
(1 row)
pgslekt=>
regards,
--
Leif Biberg Kristensen
http://solumslekt.org/
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To: pgsql-sql@postgresql.org
Cc: leif@solumslekt.org
Subject: Re: Plpgsql: Iterating through a string of parameters
In-Reply-To: <201003251700.25623.leif@solumslekt.org>
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