Re: much slower query in production

["MichaelDBA@xxxxxxxxxxx" <michaeldba@xxxxxxxxxxx>]

Vacuum everything that you restored

Sent from my iPhone

On Feb 26, 2020, at 1:19 PM, Michael Lewis <mlewis@xxxxxxxxxxx> wrote:



UPDATE multicards
   SET defacements = COALESCE( count, 0 )
  FROM ( SELECT multicard_uid, COUNT(*) AS count FROM tickets GROUP BY multicard_uid ) AS sub
 WHERE uid = multicard_uid OR multicard_uid is null;

I expect this should work. Not sure of performance of course.