10 Commits

Author	SHA1	Message	Date
wangyisong1996	25b5a2ce18	*: Refactor aggregation (#4605) ... Aggregation results were stored in aggregation functions, so one map is created for each function to store different groups’ results, which requires much memory. The aggregation functions are refactored and are now stateless, and the maps are kept in executor (executor.HashAggExec and mocktikv.aggregateExec) so that only one map is needed to store all the functions’ results, which reduced the memory usage.	2017-09-22 19:41:01 +08:00
Jian Zhang	2762c44161	*: move aggregate functions to an individual package "aggregation" (#4549)	2017-09-18 15:07:35 +08:00
Yiding Cui	c7c248eb91	executor: change struct row to []types.Datum (#4072)	2017-08-09 18:37:57 +08:00
Han Fei	eac2769606	*: change the format of aggregation's result (#3483)	2017-06-21 18:19:03 +08:00
Han Fei	ad52a2462c	executor: add open inteferce for Executor. (#3221)	2017-05-09 21:13:22 +08:00
Yang Zhexuan	858d76bbe3	executor: fixed comments warning. (#3187)	2017-05-01 19:19:32 +08:00
Lynn	97bfafa702	*: Use AggregationFunction instead of evaluate in aggregation (#3040)	2017-04-14 19:49:00 +08:00
Ewan Chou	a6e0019733	executor: use MVMap for aggregate (#3028)	2017-04-11 13:07:40 +08:00
Bin Liu	9f17a88377	fix some typo in comments (#2943)	2017-03-29 08:55:49 +08:00
Han Fei	7965666bce	executor: ajust some code. (#2574)	2017-01-30 09:45:50 +08:00