Re: UNNEST result order vs Array data
Achilleas Mantzios <achill@matrix.gatewaynet.com>
From: Achilleas Mantzios <achill@matrix.gatewaynet.com>
To: pgsql-sql@postgresql.org
Date: 2013-06-20T11:15:13Z
Lists: pgsql-sql
On 20/06/2013 13:45, Vik Fearing wrote: > On 06/20/2013 12:40 PM, gmb wrote: >> Hi all >> I just want to confirm something regarding UNNEST function used with arrays. >> I cannot see that it is specifically mentioned in the documentation , but >> maybe because it is obvious. >> >> Is the order of the result guaranteed to be the order of the array > Order is never guaranteed unless you specify an ORDER BY clause. > > I really think that the order should exactly reflect the order in the array. Think of ARRAY as Relation + ORDER. Relation + Order gives an ARRAY, ARRAY should give Relation *and* ORDER in return. -- Achilleas Mantzios