note 107086 added to mongocollection.group

Here's my code to do an equivalent of a GROUP BY and a SUM $contributionCol = $db->customers->contribution; $group = $contributionCol->group(array('date' => true), array('sum' => 0), "function (obj, prev) { prev['sum'] += obj.amount; }"); This groups by the 'date' column and sums over the 'amount' column. In my testing this was much slower than querying all rows and doing the Group by code with PHP. It could just be my particular setup and data set. Also at first my amount column was a string, which caused the results to be concatenated rather than arithmetic addition, something else to watch out for. ---- Server IP: 64.71.164.2 Probable Submitter: 69.21.197.122 ---- Manual Page -- http://www.php.net/manual/en/mongocollection.group.php Edit -- https://master.php.net/note/edit/107086 Del: integrated -- https://master.php.net/note/delete/107086/integrated Del: useless -- https://master.php.net/note/delete/107086/useless Del: bad code -- https://master.php.net/note/delete/107086/bad+code Del: spam -- https://master.php.net/note/delete/107086/spam Del: non-english -- https://master.php.net/note/delete/107086/non-english Del: in docs -- https://master.php.net/note/delete/107086/in+docs Del: other reasons-- https://master.php.net/note/delete/107086 Reject -- https://master.php.net/note/reject/107086 Search -- https://master.php.net/manage/user-notes.php