Re: unnest

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: John Hansen <john(at)geeknet(dot)com(dot)au>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: unnest
Date: 2004-11-29 02:18:32
Message-ID: 200411290218.iAT2IWW05787@candle.pha.pa.us
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I assume this is not something for our PostgreSQL CVS, even the later
SRF implementation.

---------------------------------------------------------------------------

John Hansen wrote:
> Attached, array -> rows iterator.
>
> select * from unnest(array[1,2,3,4,5]);
>
> Unnest
> ---------------
> 1
> 2
> 3
> 4
> 5
> 5 rows
>
> The switch statement could probably be done in a different way, but
> there doesn't seem to be any good examples of how to return anyitem. If
> anyone have a better way, please let me know.
>
> Does anyone know how to check individual array elements for NULL values?
> PG_ARG_ISNULL() seems to return true if ANY array element is null; ex::
> array[1,2,3,null,4,5]
>
> Comments / improvements welcome.
>
> Kind regards,
>
> John
>

Content-Description: Makefile

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Content-Description: unnest.c

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Content-Description: unnest.sql

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Bruce Momjian | http://candle.pha.pa.us
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In response to

  • unnest at 2004-11-05 12:09:58 from John Hansen

Responses

  • Re: unnest at 2004-11-29 17:23:56 from Joe Conway

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