Select Distinct Order By Array_Position

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From: Mark Williams <markwillimas@gmail.com>
To: pgsql-sql@lists.postgresql.org
Subject: Select Distinct Order By Array_Position
Date: Mon, 26 Nov 2018 19:12:39 -0000
Message-ID: <004301d485bc$00347250$009d56f0$@gmail.com> (raw)

Hi,

I am getting an error "SELECT DISTINCT, ORDER BY expressions must appear in
select list". I am ordering by documents.id and it appears in my select
list. So I am guessing the problem lies with the array. Is there any way of
achieving this? Query is below.

SELECT DISTINCT documents.id, page_no FROM texts LEFT JOIN documents on
documents.id=texts.doc_id WHERE doc_id IN (26194, 2345, 189) AND  (text LIKE
'%RIVER%') ORDER BY array_position(ARRAY[26194, 2345, 189]::INTEGER[],
documents.id)

Thanks,

Mark

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