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From: Mark Williams <markwillimas@gmail.com>
To: 'Rob Sargent' <robjsargent@gmail.com>
Cc: pgsql-sql@lists.postgresql.org
Subject: RE: Select Distinct Order By Array_Position
Date: Mon, 26 Nov 2018 19:58:37 -0000
Message-ID: <004e01d485c2$6c45cb50$44d161f0$@gmail.com> (raw)
In-Reply-To: <57AC3D96-24B8-4D06-8946-AF6E0116888F@gmail.com>
References: <004301d485bc$00347250$009d56f0$@gmail.com>
	<57AC3D96-24B8-4D06-8946-AF6E0116888F@gmail.com>

Wasn’t aware it was possible to put array_position statement in the actual select or is this a select within a select?

 

Also, I am selecting from an ordered (randomly) subset of data and I need to return the result set in the same order so do have to output the array as part of the order by?

 

__

 

From: Rob Sargent <robjsargent@gmail.com> 
Sent: 26 November 2018 19:20
To: Mark Williams <markwillimas@gmail.com>
Cc: pgsql-sql@lists.postgresql.org
Subject: Re: Select Distinct Order By Array_Position

 

 





On Nov 26, 2018, at 12:12 PM, Mark Williams <markwillimas@gmail.com <mailto:markwillimas@gmail.com> > wrote:

 

Hi,

 

I am getting an error “SELECT DISTINCT, ORDER BY expressions must appear in select list”. I am ordering by  <http://documents.id/; 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  <http://documents.id/; documents.id, page_no FROM texts LEFT JOIN documents on  <http://documents.id/; 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[],  <http://documents.id/; documents.id)

 

Thanks,

 

Mark

__

 

Try put the array_position clause in the select and add documents.id <http://documents.id;  to the order by?

 

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