Re: select from composite type

From: "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>
To: Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
Cc: Lorusso Domenico <domenico(dot)l76(at)gmail(dot)com>, pgsql-general(at)lists(dot)postgresql(dot)org
Subject: Re: select from composite type
Date: 2024-02-05 00:48:19
Message-ID: CAKFQuwbgspq1_jRD=zoB-k+NOJ4v0D3_XRFihGW5egcJB-u56Q@mail.gmail.com
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On Sun, Feb 4, 2024 at 5:39 PM Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
wrote:

>
> >
> > attribute_list is an array of composite type (with 20 fields).
>
> I am trying to wrap my head around "array of composite type". Please
> provide an example.
>

ARRAY[ (1,2)::point, (3,4)::point ]::point[]

The main problem is the concept of writing "from($1)" in any query makes no
sense, you cannot parameterize a from clause directly like that. You have
to put the value somewhere an expression is directly allowed.

David J.

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