Re: array_length(anyarray)

From: Marko Tiikkaja <marko(at)joh(dot)to>
To: Andrew Dunstan <andrew(at)dunslane(dot)net>
Cc: PostGreSql hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: array_length(anyarray)
Date: 2013-12-18 21:19:27
Message-ID: 52B2115F.8030206@joh.to
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On 2013-12-18 22:13, Andrew Dunstan wrote:
> On 12/18/2013 03:27 PM, Marko Tiikkaja wrote:
>> Attached is a patch to add support for array_length(anyarray), which
>> only works for one-dimensional arrays, returns 0 for empty arrays and
>> complains if the array's lower bound isn't 1. In other words, does
>> the right thing when used with the arrays people use 99% of the time.
>
> Why the heck would it complain if the lower bound isn't 1?

Because then you're free to assume that the first element is [1] and the
last one is [array_length()]. Which is what 99% of the code using
array_length(anyarray, int) does anyway.

Regards,
Marko Tiikkaja

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