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From: Erik Wienhold <[email protected]>
To: Marcos Pegoraro <[email protected]>
Cc: Postgres General <[email protected]>
Subject: Re: Length returns NULL ?
Date: Wed, 5 Jun 2024 21:07:52 +0200
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAB-JLwZmKYDT=0WSkvKHLqaejxWoMjBok3YjUtAtM1U8=N__0g@mail.gmail.com>
References: <CAB-JLwZmKYDT=0WSkvKHLqaejxWoMjBok3YjUtAtM1U8=N__0g@mail.gmail.com>

On 2024-06-05 19:50 +0200, Marcos Pegoraro wrote:
> There are some functions called ...length, but only array_length returns
> NULL on empty array, why ?

Because the empty array has zero dimensions[1].  But now I'm wondering
why array_ndims returns NULL instead of zero for empty arrays.

[1] https://www.postgresql.org/message-id/603c8f070811061951u16034c3fk5dfaa493a6739a24%40mail.gmail.com

-- 
Erik

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