45f9d6a00f
statistics: compute and store column order correlation with handle ( #9315 )
2019-02-27 11:32:00 +08:00
32b1dbd8d5
*: rename "github.com/pkg/errors" to "github.com/pingcap/errors" ( #8136 )
...
We import "github.com/pkg/errors" in the code, and actually put
the "github.com/pingcap/errors" there in the vendor path.
That's a dirty hack, and prevent the introduce of Go module.
2018-11-01 16:09:07 +08:00
6220692e3b
stats: limit the length of sample values ( #7931 )
2018-10-18 15:30:43 +08:00
cb03f2bec1
move from juju/errors to pkg/errors ( #7151 )
2018-09-12 15:42:20 +08:00
82a6c1085c
*: introduce the concept of physical ID, code refactory ( #7374 )
2018-08-16 10:33:24 +08:00
1285088127
executor, plan: support analyze partition table ( #7190 )
2018-08-01 16:39:08 +08:00
501de19821
stats: add average column size for the histogram ( #5974 )
2018-03-23 13:44:24 +08:00
b6ad6a20a5
stats: fix building too many buckets ( #5978 )
2018-03-09 17:20:29 +08:00
4e1a114e68
*: move package context to sessionctx ( #5890 )
2018-02-22 18:03:38 +08:00
c45111d9f6
stats: use more compact structure for histograms ( #5539 )
...
* stats: use more compact structure for histograms
* address comments
* address comments
* refine code
* address comment
2018-01-05 20:43:01 +08:00
835b764db3
stats: fix bug when build histograms for null json ( #5545 )
2018-01-04 11:15:32 +08:00
8b15cb52b7
*: move StatementContext to its own package. ( #5177 )
2017-11-22 00:11:14 +08:00
30a080db5c
*: build and use count-min sketch ( #5042 )
2017-11-08 22:34:01 +08:00
62433663e5
util/types: change types path ( #5007 )
...
* util/types: change types path
2017-11-04 10:37:14 -05:00
a5266d6621
stats: fix bug when build histograms for columns ( #4757 )
2017-10-12 13:28:12 +08:00
6f84392d40
*: optimize SortExec ( #4622 )
...
* *: change key of orderByRow from "key []types.Datum" to "key []*types.Datum"
* address comment
2017-09-25 19:50:26 +08:00
31f7b9c3b6
*: implement analyze columns push down ( #4522 )
2017-09-18 14:21:10 +08:00
0e438de9ff
*: move sample collector from executor to stats ( #4468 )
2017-09-08 12:21:10 +08:00
7c273c0f29
*: implement auto analyze ( #4141 )
2017-08-18 18:42:28 +08:00
520785b149
*: fix possible race in stats update ( #3987 )
2017-08-03 20:54:15 +08:00
e0e77d3bac
*: reduce analyze table read when table contains PK ( #3783 )
...
* *: reduce analyze table read when table contains PK
* fix ci
* *: address comment
* fix ci
* statistics：make comment more accurate
2017-07-18 05:07:17 -05:00
bebd5c59e4
statistics: fix bug when calculate lowerbound ( #3677 )
2017-07-10 15:40:46 +08:00
a81726a42f
executor, statistics: analyze with null count. ( #3336 )
2017-05-26 16:44:09 +08:00
7a5cd973f8
statisitics: build and load with lowerbound ( #3327 )
2017-05-25 15:00:36 +08:00
93f4780f40
plan: add variable countReliable to physicalPlanInfo ( #3011 )
2017-04-24 17:07:31 +08:00
0f2afbf44b
statistics: prepare for analyze part of a table ( #3062 )
...
We need to make somthing like 'analyze index...' work, this is only the first step.
2017-04-20 14:05:51 +08:00
375148460f
statistics: process the case that we lack a column in stats table ( #3075 )
...
When we can't find a column in stats table, we return a pseudo table for now. It's not reasonable.
We should return a real table and use pseudo estimation for the missed histogram.
2017-04-18 23:34:52 +08:00
dcf12b5273
statistics: refactor statistics package. ( #3044 )
2017-04-13 13:13:52 +08:00
8a87d775b8
statistics: remove rlock using copy on write. ( #3029 )
...
every time we update stats cache, we copy the whole map. By this way we can avoid rlock.
2017-04-12 10:22:22 +08:00
113070162e
statistics: separate Column and Index Histogram ( #3031 )
2017-04-11 17:24:17 +08:00
e3a0dc68ce
*: use column id to get stats instead of column offset ( #3019 )
...
Now we assume that the order of columns in stats matches the column offsets. It will return wrong stats sometimes.
If we analyze when a table is (c1, c2) and then drop c1, the c2's offset will become 0. But in stats the position of 0 is c1. I have added this case to test.
2017-04-10 16:03:20 +08:00
b6ff4ad4b1
statistics: add bucket structure. ( #2993 )
2017-04-06 10:15:18 +08:00
16cefef717
executor, statistics: use FM sketch to estimate NDV ( #2966 )
2017-04-01 15:03:54 +08:00
82285af11d
*: change the way of column estimating. ( #2956 )
...
When the ddl happens after loading stats. We can estimate as peusdo column for the missed column, instead of making the whole table peusdo.
I havn't processed the case of index. It's the first step.
2017-04-01 14:55:09 +08:00
e7bb049b0e
statistics: adjust codes. ( #2952 )
2017-03-29 18:09:47 +08:00
