planner: consider prefix index column length in skyline pruning #27527

xuyifangreeneyes · 2021-08-24T04:12:20Z

What problem does this PR solve?

Issue Number: close #27313

Problem Summary:
Skyline pruning prunes maybe-good prefix index.

What is changed and how it works?

When comparing columns occurred in access conditions or index conditions, we say path1's columns are a strictly subset of path2's if each path1's column exists in path2's columns and the length of path1's column is less than or equal to the length of the corresponding path2's column.

Check List

Tests

Unit test
Integration test
Manual test (add detailed scripts or steps below)
No code

Side effects

Performance regression: Consumes more CPU
Performance regression: Consumes more Memory
Breaking backward compatibility

Documentation

Release note

'None'

ti-chi-bot · 2021-08-24T04:12:21Z

[REVIEW NOTIFICATION]

This pull request has been approved by:

Reminiscent
winoros

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winoros · 2021-11-24T09:03:09Z

planner/core/find_best_task.go

+	return true
+}
+
+func compareColumnsWithLens(lhs, rhs []*columnWithLen) (int, bool) {


Add some comments for this function.

winoros · 2021-11-24T09:05:55Z

planner/core/find_best_task.go

@@ -415,12 +416,112 @@ func (ds *DataSource) tryToGetDualTask() (task, error) {
 	return nil, nil
 }

+type columnWithLen struct {


We can move it to planner/util.
And add type alias type ColumnsWithLen []*ColumnWithLen
Then move the functions firstDominateSecond, compareColumnsWithLens to ColumnsWithLen's member function.

winoros · 2021-11-24T09:06:18Z

planner/core/find_best_task.go

+	return 1
+}
+
+func firstDominateSecond(cols1, cols2 []*columnWithLen) bool {


Also, add comments for this one.

xuyifangreeneyes · 2021-11-25T05:23:38Z

/cc @rebelice @time-and-fate @Reminiscent

planner/util/path_test.go

winoros · 2021-11-25T06:25:28Z

planner/util/path.go

+	return -1
+}
+
+// c1 dominates c2 when each column of c2 exists in c1 and c2's column length is no longer than c1's column length.


Maybe we should follow the pattern

Suggested change

// c1 dominates c2 when each column of c2 exists in c1 and c2's column length is no longer than c1's column length.

// dominates checks/tells ...

Reminiscent · 2021-11-26T06:48:59Z

planner/util/path.go

+	}
+}
+
+func compareLength(l, r int) int {


Add some comments to explain the return value.

Reminiscent · 2021-11-26T07:23:36Z

/merge

ti-chi-bot · 2021-11-26T07:23:38Z

This pull request has been accepted and is ready to merge.

Commit hash: 401703c

…/tidb into fix-issue-27313

Reminiscent · 2021-11-26T07:44:03Z

/merge

ti-chi-bot · 2021-11-26T07:44:07Z

This pull request has been accepted and is ready to merge.

Commit hash: 2a5be8f

* executor: fix error msg of granting non-table level privilege (#29321) * server: fix bug https://asktug.com/t/topic/213082/11 (#29577) * *: replace compareDatum by compare (#30048) * executor, store: replace compareDatum by compare (#30044) * executor: migrate test-infra to testify for executor/write_test.go (#29953) * planner: add sub plan info of shuffleReceiver when query explain analyze (#27992) * expression: fix wrong flen for CastAsString funtion (#29563) * br: migrate test-infra to testify for redact (#29747) * ddl: stable create expression index test (#29990) * *: replace compareDatum by compare (#30060) * planner: fix the issue that binding cannot work when sql_select_limit is enabled (#29789) * br : migrate test-infra to testify for lightning/backend/tidb/tidb_test.go (#30042) * *: fix unstable test in placement gc cases (#30045) * lightning: let ignore columns be compatible with tidb backend (#27850) * statistics: replace compareDatum by compare (#30052) * br/pkg/mock: migrate test-infra to testify (#30034) * ddl: forbit alter table cache in system db (#29998) * topsql: distinguish the row and index operation type (#29044) * ddl, util/codec: fix add index OOM and prevent panic in logging (#29925) * br/pkg/utils: migrate tests to testify (#30032) * expression, sessionctx: support rand_seed1 and rand_seed2 sysvar (#29936) * *: track the memory usage of IndexJoin more accurate (#29068) * br : migrate test-infra to testify for lightning/backend/importer (#30073) * planner: fix panic when the join key is scalarFunction (#30002) * ddl: fix none info of `alter table placement` (#29929) * expression: cast charset according to the function's resulting charset (#29905) * *: replace compareDatum by compare and fix compare (#30090) * store/driver: Use BatchGet method supported in client-go. (#29860) * privilege: disable role privilege when it is revoked from an user (#30028) * partition: Show partition reformat (#29945) * planner: fix the unstable test `TestPartitionWithVariedDatasources` (#30139) * server: Add a `MockConn` to enable testing connections (#30119) * *: skip unstable test (#29433) * skip test Signed-off-by: yisaer <disxiaofei@163.com> * skip unstable test Signed-off-by: yisaer <disxiaofei@163.com> * table/tables: add `StateRemote` interface for the cached table (#29152) * planner: rebuild range when the range is empty (#30003) * planner: support dump file for trace plan statement (#30059) * planner: make clear for MaybeOverOptimized4PlanCache (#29782) * update: fix the updatable table name resolution in build update list (#30061) * expression : prevent function DATE_ADD/SUB_STRING_XXX pushed down to TiFlash (#30154) * *: remove unused profile memory tracker from global tracker (#30143) * expression, util/codec: fix wrongly eliminated conditions caused by `HashCode()` collision (#30120) * cmd, expression: fix convert binary string to gbk (#30004) * sessionctx/variable: make lc_time_names read only (#30084) * expression: fix misuse of datumsToConstants in GBK test (#30072) * plugin: add more tests to cover audit logs (#30165) * planner: consider prefix index column length in skyline pruning (#27527) * server: support download optimize trace file (#30150) * expression: add ut config (#30156) * ddl/ddl_test.go: refactor testTableInfo to return error (#30069) * *: skip a case in TestClusterTables/ForClusterServerInfo on mac M1 (#29933) * planner: do not add extra limit when handle the execute stmt (#30152) * ddl: migrate test-infra to testify for db_cache_test.go (#30117) * tables: fix data race in mockStatRemoteData (#30180) * server: Port missing in processlist (#30183) * server: add build not race flag (#30184) * unistore: get/batchGet/scan support read-through-lock (#29898) * topsql: fix nil pointer panic in stmtctx (#30181) * types: fix wrong str_to_date() microseconds with leading zeros are not converted correctly (#30122) * dumpling: Add support for `Create Placement` (#29724) * *: add cardinality estimation trace for `Selectivity` (#29883) * *: replace compareDatum by compare and ignore warnings is collate is empty (#30105) * planner: implement aggregation eliminate optimize trace (#30114) * server: Combined fix for authentication issues (#29738) * executer: fix data race (#30186) * dumpling : add a function for the variable call of dm (#30033) * planner: revise optimize trace logic (#30163) * statistics: fix unstable test case TestTraceCE (#30235) * lightning: avoid retry write rows and record duplicate rows in tidb backend (#30179) * executor: send a task with error to the resultCh when panic happen (#30214) * docs: update placement policy limits (#30202) * expression: Support GBK for builtin function AesEncrypt. (#29946) * executor: remove useless log (#30248) * docs: Update 2021-09-29-secure-bootstrap.md (#30243) * executor: fix unstable test of topsql (#30257) * copr: add paging API for streaming-like process (#29612) * *: forbid set TiFlash Replica for a table with unsupport charset (#30162) * privilege, session, server: consistently map user login to identity (#30204) * expression: fix flen for timestamp_add (#30213) * types: check values equals to NaN or Inf when convert to float (#30148) * parser: respect TiDB comment when DROP INDEX IF EXISTS (#30173) * ddl: disallow change columns from zero int to time (#25728) * * : statement summary should know the slow write is blocked on read lock lease (#30166) * planner: regard NULL as point when accessing composite index (#30244) * planner: Add trace for proj elimination rule (#30275) * privilege,session: Match loopback connections to 'localhost' accounts (#29995) (#30189) * ddltest: refactor logutil.InitLogger in ddltest to avoid data race (#30299) * load data: fix bug if load data with long content (#29222) * topsql: reduce data race of sql digest (#30296) * ddl: Do not consider the clustered index when checking the length of the secondary index (#29660) * *: update client-go to use resolveForRead (#30314) * ddl/ddl_algorithm_test.go: migrate test-infra to testify (#30268) * store: Add metrics for pd api call time (#30062) * *: replace compareDatum by compare and fix wrong optimize order by (#30273) * metrics/grafana: fix display for 'Start TSO Wait Duration' panel (#30311) * ddl: migrate test-infra to testify for ddl/options_test.go (#30269) * planner: fix inconsistent schema between UnionAll and child operator (#30231) * test: fix incorrect regexp pattern during migrating test (#30080) * br: add more precise check for lock file (#30218) * executor: replace should not change other rows when auto ID is out of range (#30301) * tidb-server: return 1 while failing to set cpu affinity (#30197) * executor: migrate test-infra to testify for executor/index_lookup_join_test.go (#30260) * expression: fix wrong result of greatest/least(mixed unsigned/signed int) (#30121) * types: casting JSON literal `null` to number types should fail (#30278) * executor: fix data race in oomtest (#30339) * parser: fix missing charset and collation of handle column (#30320) * expression: don't append null when param for char() is null (#30236) * *: add warn log for stale read (#30340) * parser: support multi bracket for subquery (#29656) * session, sessionctx/variable: fix validation recursion bug (#30293) * planner: Add trace for agg pushdown rule (#30262) * planner/core: fix a data race when building plan for cached table (#30355) * executor: avoid sum from avg overflow (#30010) * config: make EnableSlowLog atomic (#30346) * *: fix goroutine leak in ddl intergration test (#30369) * executor: make projection executor unparallel for insert/update/delete (#30290) * executor, util: reset offsets and nullBitMap for MutRow when setting new values (#30265) * expression: fix tidb can't alter table from other-type with null value to timestamp with NOT NULL attribute (#29664) * dumpling: fix default collation with upstream when dump database and table (#30292) * ddl: fix the enum default value by triming trailing space (#30356) * expression: migrate test-infra to testify for flag_simplify_test.go (#30407) * server: refine code logic in handleDownloadFile (#30422) * refine logic Signed-off-by: yisaer <disxiaofei@163.com> * fix Signed-off-by: yisaer <disxiaofei@163.com> * ddl: migrate test-infra to testify for ddl/table_test.go (#30267) * ddl: handle the error from `addBatchDDLJobs()` correctly (#30401) * br: fix the integration tests (#30423) * util, cmd: remove unused filesort (#30438) * *: update client-go for small backoff time (#30436) * server: Fix unstable tests with FakeAuthSwitch (#30287) * dumpling: fix dump failed when sequence exists (#30164) * *: replace compareDatum by compare (#30421) * lightning: fix gcs max key limit (#30393) * expression, parser: add built-in func is_uuid (#30318) * expression: migrate test-infra to testify for constant_fold_test.go (#30424) * executor: fix pipelined window invalid memory address (#30418) * makefile: add gotestsum for verify ci (#29848) * server: close sql rows to fix unstable test (#30306) * Makefile: add coverage record for BR and Dumpling (#30457) * executor: track the mem usage of IndexMergeReader (#30210) * infosync: close body when ReadAll encounters error (#30462) * planner: show accessed partition when explain mpp query over partition table (#30367) * *: Fix use of user identity in SHOW GRANTS + error messages (#30294) * ddl: add not null flag for auto_increment column (#30477) * expression: make some unstable test serial (#30323) * expression: migrate test-infra to testify for constant_propagation_test.go (#30430) * executor: stable test TestSetDDLReorgBatchSize and TestSetDDLReorgWorkerCnt (#30480) * statistics, util/ranger: add cardinality estimation trace for `GetRowCountBy...` (#30321) * *: skip mysql client goroutine leak detection in integration ddl (#30467) * executor,util: write slow query to slow log no matter what log level (#30461) * executor: enable index_merge used in transaction. (#29875) * logutil: add testcase for SlowQueryLogger.MaxDays/MaxSize/MaxBackups (#30316) * expression: fix data race in builtin_other_vec_generated_test.go (#30503) * expression: fix data race in the collationInfo (#30490) * planner/core, session: fix error message of wrong variable scope (#30510) * lightning: support Re/ReregisterMySQL by different tls name (#30463) * executor: TestBatchGetandPointGetwithHashPartition test typo (#29669) (#29671) * mockstore: improve log to avoid panic for nil pointer (#30513) * *: replace compareDatum by compare, PR 10 (#30456) * planner: Disable dynamic partition prune mode for all non-autocommit (#27532) (#30505) * expression: change the log level of an confusing log from warn to debug (#30484) * br: Check crypter.key valid before backup (#29991) * *: replace compareDatum by compare, PR 11 (#30465) * dumpling: fix default column collation with upstream when dump table (#30531) * server: fix prepared cursor select (#30285) * executor: HashJoinExec checks the buildError even if the probeSide is empty (#30471) * parser, expression: follow mysql, increase interval precedence (#30528) * makefile: set timeout 25m for make race (#30555) * planner: fix the unstable test TestAnalyzeGlobalStatsWithOpts/2 (#30576) * expression,types: Adjusts UNIX_TIMESTAMP() for non-existing DST values (#28739) (#30405) * br: add res.Body.close to avoid leak (#30545) * lightning: add back integration test lightning_error_summary (#30547) * sessionctx/variable: small refactor (split large file) (#30511) * ddl: let `admin cancel ddl jobs` run in a new transaction (#30549) * *: Retry when placement PutBundles failed (#30590) * dumpling: delete unit test in github actions (#30562) * *: support trace plan target='estimation' statement (#30491) * expression: migrate test-infra to testify for integration_test.go (#30548) * planner: support trace for min/max eliminate (#30441) * support min/max trace Signed-off-by: yisaer <disxiaofei@163.com> * address the comment Signed-off-by: yisaer <disxiaofei@163.com> Co-authored-by: Ti Chi Robot <ti-community-prow-bot@tidb.io> * br: remove cdclog in br (#30573) * *: show cmd to check if all needed histograms are loaded (#29672) * expression: clone repertoire when clone the scalar function (#30602) * *: use the real StateRemote interface implementation for cached table (#30066) * *: query failed after add index / timestamp out-of-range (#28424) (#29323) * planner: implement collecting predicate columns from logical plan (#29878) * *: show PK name when decoding the clustered index row key (#30623) * ddl/callback_test.go: migrate test-infra to testify (#30317) * *: Rename some names of placement ddl operation (#30622) * executor: fix data race in the index_lookup_hash_join (#30619) * ddl: remove unnecessary locking when adding an index (#29772) * server: try to make `TidbTestSuite` more stable (#30643) * *: Add some PD tests for placement and fix some bug found (#30621) * *: migrate sync.WaitGroup to util.WaitGroupWrapper (#30644) * planner: add trace for join eliminate rule (#30343) * executor: migrate test-infra to testify for executor/shuffle_test.go (#30514) * planner: make (*AccessPath).OnlyPointRange more succinct (#30520) * planner: add trace for join reorder (#30394) * executor: migrate test-infra to testify for executor/union_scan_test.go (#30525) * expression: make cast return error if cast binary literal to another character set (#30537) * *: update tikv client (#30670) * *: update sysutil in go.mod to fix panic when search log (#30523) * topsql: shouldn't evict the SQL meta, since the evicted SQL can be appear on Other components (TiKV) TopN records (#27050) * testify: migrate test-infra to testify for analyze_test.go (#30640) * util: replace compareDatum by compare, point part (#30575) * test: make all the tests run in serial (#30692) * statistics: add mutex for Handle.globalMap and Handle.feedback (#30550) * executor: fix regular expression in json so that it could match identifer start with '$' (#29750) * util/testkit/testkit.go: fix typo (#30638) * planner: Introduce a new global variable to control the historical statistics feature (#30646) * topsql: introduce datasink interface (#30662) * planner: unify the argument of stats functions to use SessionCtx instead of StatementContext (#30668) * metrics: fix the Max SafeTS Gap metrics (#30689) * lightning: Add source dir existence check for s3 (#30674) * golangci-lint: support durationcheck (#30027) * executor: fix data race on IndexHashJoin.cancelFunc (#30701) * sessionctx/variable: change tidb_store_limit to global only (#30522) * statistics: remove reassignment of Handle.pool in NewHandle (#30675) * br: fix some unstable unit test cases. (#30716) * bindinfo: fix the comment typo (#30616) * server: support decoding prepared string args to character_set_client (#30723) * expression: fix enum type join binary get wrong result (#30445) * cmd/explaintest: fix wrong result comparison for explain test (#30717) * parallel create tables in br * metrics: fix copr-cache metrics (#30712) * test: merge executor's serial tests to other tests (#30711) * statistics: avoid deadlock when create/drop extended stats and analyze at the same time (#30566) * ddl: add batch create table api Signed-off-by: xhe <xw897002528@gmail.com> * ddl: add unit tests Signed-off-by: xhe <xw897002528@gmail.com> * ddl: fix fmt Signed-off-by: xhe <xw897002528@gmail.com> * ddl: typo Co-authored-by: Arenatlx <ailinsilence4@gmail.com> * ddl: fix tests Signed-off-by: xhe <xw897002528@gmail.com> * ddl: rename to BatchCreateTableWithInfo Signed-off-by: xhe <xw897002528@gmail.com> * ddl: trace the error Signed-off-by: xhe <xw897002528@gmail.com> * ddl: comments Signed-off-by: xhe <xw897002528@gmail.com> * ddl: cancle the job right Signed-off-by: xhe <xw897002528@gmail.com> * ddl: cancel the job right 2 Signed-off-by: xhe <xw897002528@gmail.com> * ddl: report error if entry too large Signed-off-by: xhe <xw897002528@gmail.com> * ddl: report error when table is duplicated Signed-off-by: xhe <xw897002528@gmail.com> * ddl: go fmt Signed-off-by: xhe <xw897002528@gmail.com> * infoschema: improve batch memory perf Signed-off-by: xhe <xw897002528@gmail.com> * ddl: retain ID Signed-off-by: xhe <xw897002528@gmail.com> * sessionctx: fix the value of analyze_version when upgrading 4.x to 5.… (#30743) * ddl: reduce log frequency Signed-off-by: xhe <xw897002528@gmail.com> * ddl: fix tests Signed-off-by: xhe <xw897002528@gmail.com> * server: disable socket listener for `basicHTTPHandlerTestSuite` (#30680) * planner: support the plan cache aware of bindings (#30169) * planner: fix early set of plan's statisticsTable (#30754) * *: implement renew write lock lease for cached table (#30206) * *: Modify placement rule index to reserve some indexes for future work (#30737) * executor: add an unit test case for unreasonable invoking Close (#30696) * planner: fix wrong subquery's coercibility (#30750) Co-authored-by: unconsolable <chenzhipeng2012@gmail.com> Co-authored-by: zhangguangchao <1614439+zgcbj@users.noreply.github.com> Co-authored-by: wjHuang <huangwenjun1997@gmail.com> Co-authored-by: Weizhen Wang <wangweizhen@pingcap.com> Co-authored-by: mmyj <mayj.hello@gmail.com> Co-authored-by: Shenghui Wu <793703860@qq.com> Co-authored-by: tison <wander4096@gmail.com> Co-authored-by: Yuanjia Zhang <zhangyuanjia@pingcap.com> Co-authored-by: xiaolunzhou <51695571+JayL-zxl@users.noreply.github.com> Co-authored-by: 王超 <cclcwangchao@hotmail.com> Co-authored-by: glorv <glorvs@163.com> Co-authored-by: sylzd <liuzidong@xiaomi.com> Co-authored-by: Yexiang Zhang <mornyx.z@gmail.com> Co-authored-by: tangenta <tangenta@126.com> Co-authored-by: Yujie Xia <xiayjchn@gmail.com> Co-authored-by: Hangjie Mo <mohangjie1995@gmail.com> Co-authored-by: HuaiyuXu <391585975@qq.com> Co-authored-by: Song Gao <disxiaofei@163.com> Co-authored-by: xiongjiwei <xiongjiwei1996@outlook.com> Co-authored-by: WangDeng <DWang_Slam@163.com> Co-authored-by: Mattias Jonsson <mjonss@users.noreply.github.com> Co-authored-by: djshow832 <zhangming@pingcap.com> Co-authored-by: tiancaiamao <tiancaiamao@gmail.com> Co-authored-by: Chengpeng Yan <41809508+Reminiscent@users.noreply.github.com> Co-authored-by: Arenatlx <314806019@qq.com> Co-authored-by: Meng Xin <tregoldmeng@gmail.com> Co-authored-by: Zhou Kunqin <25057648+time-and-fate@users.noreply.github.com> Co-authored-by: Youra Cho <espresso98@users.noreply.github.com> Co-authored-by: Yifan Xu <30385241+xuyifangreeneyes@users.noreply.github.com> Co-authored-by: José Clovis Ramírez de la Rosa <clovis-@live.com> Co-authored-by: Xiang Zhang <angwerzx@126.com> Co-authored-by: Lei Zhao <zlwgx1023@gmail.com> Co-authored-by: Daniël van Eeden <git@myname.nl> Co-authored-by: docsir <73268456+docsir@users.noreply.github.com> Co-authored-by: Morgan Tocker <tocker@gmail.com> Co-authored-by: jakevin <30525741+jackwener@users.noreply.github.com> Co-authored-by: 姬小野 <38575466+JameyWoo@users.noreply.github.com> Co-authored-by: you06 <you1474600@gmail.com> Co-authored-by: lance6716 <lance6716@gmail.com> Co-authored-by: TonsnakeLin <87681388+TonsnakeLin@users.noreply.github.com> Co-authored-by: imentu <imentu@foxmail.com> Co-authored-by: Alkaid <38248129+jyz0309@users.noreply.github.com> Co-authored-by: lvtu <37565148+tongtongyin@users.noreply.github.com> Co-authored-by: 3pointer <luancheng@pingcap.com> Co-authored-by: Zhuhe Fang <fzhedu@gmail.com> Co-authored-by: WizardXiao <89761062+WizardXiao@users.noreply.github.com> Co-authored-by: Jianjun Liao <36503113+Leavrth@users.noreply.github.com> Co-authored-by: guo-shaoge <shaoge1994@163.com> Co-authored-by: Ryan Leung <rleungx@gmail.com> Co-authored-by: xufei <xufei@pingcap.com> Co-authored-by: Ehco <zh19960202@gmail.com> Co-authored-by: Zak Zhao <57036248+joccau@users.noreply.github.com> Co-authored-by: xhe <xw897002528@gmail.com> Co-authored-by: Chunzhu Li <lichunzhu@stu.xjtu.edu.cn> Co-authored-by: Ti Chi Robot <ti-community-prow-bot@tidb.io> Co-authored-by: Xiaoju Wu <wuxiaoju@pingcap.com> Co-authored-by: JmPotato <ghzpotato@gmail.com> Co-authored-by: Zach <51114270+zach030@users.noreply.github.com> Co-authored-by: bb7133 <bb7133@gmail.com> Co-authored-by: crazycs <crazycs520@gmail.com> Co-authored-by: znhh6018 <44599853+znhh6018@users.noreply.github.com> Co-authored-by: eddie lin <eddievim@foxmail.com> Co-authored-by: dongjunduo <andj4cn@gmail.com> Co-authored-by: Zhenchi <zhongzc_arch@outlook.com> Co-authored-by: wangggong <793160615@qq.com> Co-authored-by: zhangjinpeng1987 <zhangjinpeng@pingcap.com> Co-authored-by: Jack Yu <yusp@pingcap.com> Co-authored-by: Arenatlx <ailinsilence4@gmail.com> Co-authored-by: Yiding Cui <winoros@gmail.com>

* executor: migrate test-infra to testify for executor/show_stats_test.go (#30000) * ddl/table_split_test.go: migrate test-infra to testify (#29960) * *: fix unstable test caused by TestRandomPanicAggConsume (#30035) * ddl/ddl_test.go: refactor testSchemaInfo to return error #29964 (#30008) * executor: remove useless parameter (#30043) * executor: fix error msg of granting non-table level privilege (#29321) * server: fix bug https://asktug.com/t/topic/213082/11 (#29577) * *: replace compareDatum by compare (#30048) * executor, store: replace compareDatum by compare (#30044) * executor: migrate test-infra to testify for executor/write_test.go (#29953) * planner: add sub plan info of shuffleReceiver when query explain analyze (#27992) * expression: fix wrong flen for CastAsString funtion (#29563) * br: migrate test-infra to testify for redact (#29747) * ddl: stable create expression index test (#29990) * *: replace compareDatum by compare (#30060) * planner: fix the issue that binding cannot work when sql_select_limit is enabled (#29789) * br : migrate test-infra to testify for lightning/backend/tidb/tidb_test.go (#30042) * *: fix unstable test in placement gc cases (#30045) * lightning: let ignore columns be compatible with tidb backend (#27850) * statistics: replace compareDatum by compare (#30052) * br/pkg/mock: migrate test-infra to testify (#30034) * ddl: forbit alter table cache in system db (#29998) * topsql: distinguish the row and index operation type (#29044) * ddl, util/codec: fix add index OOM and prevent panic in logging (#29925) * br/pkg/utils: migrate tests to testify (#30032) * expression, sessionctx: support rand_seed1 and rand_seed2 sysvar (#29936) * *: track the memory usage of IndexJoin more accurate (#29068) * br : migrate test-infra to testify for lightning/backend/importer (#30073) * planner: fix panic when the join key is scalarFunction (#30002) * ddl: fix none info of `alter table placement` (#29929) * expression: cast charset according to the function's resulting charset (#29905) * *: replace compareDatum by compare and fix compare (#30090) * store/driver: Use BatchGet method supported in client-go. (#29860) * privilege: disable role privilege when it is revoked from an user (#30028) * partition: Show partition reformat (#29945) * planner: fix the unstable test `TestPartitionWithVariedDatasources` (#30139) * server: Add a `MockConn` to enable testing connections (#30119) * *: skip unstable test (#29433) * skip test Signed-off-by: yisaer <disxiaofei@163.com> * skip unstable test Signed-off-by: yisaer <disxiaofei@163.com> * table/tables: add `StateRemote` interface for the cached table (#29152) * planner: rebuild range when the range is empty (#30003) * planner: support dump file for trace plan statement (#30059) * planner: make clear for MaybeOverOptimized4PlanCache (#29782) * update: fix the updatable table name resolution in build update list (#30061) * expression : prevent function DATE_ADD/SUB_STRING_XXX pushed down to TiFlash (#30154) * *: remove unused profile memory tracker from global tracker (#30143) * expression, util/codec: fix wrongly eliminated conditions caused by `HashCode()` collision (#30120) * cmd, expression: fix convert binary string to gbk (#30004) * sessionctx/variable: make lc_time_names read only (#30084) * expression: fix misuse of datumsToConstants in GBK test (#30072) * plugin: add more tests to cover audit logs (#30165) * planner: consider prefix index column length in skyline pruning (#27527) * server: support download optimize trace file (#30150) * expression: add ut config (#30156) * ddl/ddl_test.go: refactor testTableInfo to return error (#30069) * *: skip a case in TestClusterTables/ForClusterServerInfo on mac M1 (#29933) * planner: do not add extra limit when handle the execute stmt (#30152) * ddl: migrate test-infra to testify for db_cache_test.go (#30117) * tables: fix data race in mockStatRemoteData (#30180) * server: Port missing in processlist (#30183) * server: add build not race flag (#30184) * unistore: get/batchGet/scan support read-through-lock (#29898) * topsql: fix nil pointer panic in stmtctx (#30181) * types: fix wrong str_to_date() microseconds with leading zeros are not converted correctly (#30122) * dumpling: Add support for `Create Placement` (#29724) * *: add cardinality estimation trace for `Selectivity` (#29883) * *: replace compareDatum by compare and ignore warnings is collate is empty (#30105) * planner: implement aggregation eliminate optimize trace (#30114) * server: Combined fix for authentication issues (#29738) * executer: fix data race (#30186) * dumpling : add a function for the variable call of dm (#30033) * planner: revise optimize trace logic (#30163) * statistics: fix unstable test case TestTraceCE (#30235) * lightning: avoid retry write rows and record duplicate rows in tidb backend (#30179) * executor: send a task with error to the resultCh when panic happen (#30214) * docs: update placement policy limits (#30202) * expression: Support GBK for builtin function AesEncrypt. (#29946) * executor: remove useless log (#30248) * docs: Update 2021-09-29-secure-bootstrap.md (#30243) * executor: fix unstable test of topsql (#30257) * copr: add paging API for streaming-like process (#29612) * *: forbid set TiFlash Replica for a table with unsupport charset (#30162) * privilege, session, server: consistently map user login to identity (#30204) * expression: fix flen for timestamp_add (#30213) * types: check values equals to NaN or Inf when convert to float (#30148) * parser: respect TiDB comment when DROP INDEX IF EXISTS (#30173) * ddl: disallow change columns from zero int to time (#25728) * * : statement summary should know the slow write is blocked on read lock lease (#30166) * planner: regard NULL as point when accessing composite index (#30244) * planner: Add trace for proj elimination rule (#30275) * privilege,session: Match loopback connections to 'localhost' accounts (#29995) (#30189) * ddltest: refactor logutil.InitLogger in ddltest to avoid data race (#30299) * load data: fix bug if load data with long content (#29222) * topsql: reduce data race of sql digest (#30296) * ddl: Do not consider the clustered index when checking the length of the secondary index (#29660) * *: update client-go to use resolveForRead (#30314) * ddl/ddl_algorithm_test.go: migrate test-infra to testify (#30268) * store: Add metrics for pd api call time (#30062) * *: replace compareDatum by compare and fix wrong optimize order by (#30273) * metrics/grafana: fix display for 'Start TSO Wait Duration' panel (#30311) * ddl: migrate test-infra to testify for ddl/options_test.go (#30269) * planner: fix inconsistent schema between UnionAll and child operator (#30231) * test: fix incorrect regexp pattern during migrating test (#30080) * br: add more precise check for lock file (#30218) * executor: replace should not change other rows when auto ID is out of range (#30301) * tidb-server: return 1 while failing to set cpu affinity (#30197) * executor: migrate test-infra to testify for executor/index_lookup_join_test.go (#30260) * expression: fix wrong result of greatest/least(mixed unsigned/signed int) (#30121) * types: casting JSON literal `null` to number types should fail (#30278) * executor: fix data race in oomtest (#30339) * parser: fix missing charset and collation of handle column (#30320) * expression: don't append null when param for char() is null (#30236) * *: add warn log for stale read (#30340) * parser: support multi bracket for subquery (#29656) * session, sessionctx/variable: fix validation recursion bug (#30293) * planner: Add trace for agg pushdown rule (#30262) * planner/core: fix a data race when building plan for cached table (#30355) * executor: avoid sum from avg overflow (#30010) * config: make EnableSlowLog atomic (#30346) * *: fix goroutine leak in ddl intergration test (#30369) * executor: make projection executor unparallel for insert/update/delete (#30290) * executor, util: reset offsets and nullBitMap for MutRow when setting new values (#30265) * expression: fix tidb can't alter table from other-type with null value to timestamp with NOT NULL attribute (#29664) * dumpling: fix default collation with upstream when dump database and table (#30292) * ddl: fix the enum default value by triming trailing space (#30356) * expression: migrate test-infra to testify for flag_simplify_test.go (#30407) * server: refine code logic in handleDownloadFile (#30422) * refine logic Signed-off-by: yisaer <disxiaofei@163.com> * fix Signed-off-by: yisaer <disxiaofei@163.com> * ddl: migrate test-infra to testify for ddl/table_test.go (#30267) * ddl: handle the error from `addBatchDDLJobs()` correctly (#30401) * br: fix the integration tests (#30423) * util, cmd: remove unused filesort (#30438) * *: update client-go for small backoff time (#30436) * server: Fix unstable tests with FakeAuthSwitch (#30287) * dumpling: fix dump failed when sequence exists (#30164) * *: replace compareDatum by compare (#30421) * lightning: fix gcs max key limit (#30393) * expression, parser: add built-in func is_uuid (#30318) * expression: migrate test-infra to testify for constant_fold_test.go (#30424) * executor: fix pipelined window invalid memory address (#30418) * makefile: add gotestsum for verify ci (#29848) * server: close sql rows to fix unstable test (#30306) * Makefile: add coverage record for BR and Dumpling (#30457) * executor: track the mem usage of IndexMergeReader (#30210) * infosync: close body when ReadAll encounters error (#30462) * planner: show accessed partition when explain mpp query over partition table (#30367) * *: Fix use of user identity in SHOW GRANTS + error messages (#30294) * ddl: add not null flag for auto_increment column (#30477) * expression: make some unstable test serial (#30323) * expression: migrate test-infra to testify for constant_propagation_test.go (#30430) * executor: stable test TestSetDDLReorgBatchSize and TestSetDDLReorgWorkerCnt (#30480) * statistics, util/ranger: add cardinality estimation trace for `GetRowCountBy...` (#30321) * *: skip mysql client goroutine leak detection in integration ddl (#30467) * executor,util: write slow query to slow log no matter what log level (#30461) * executor: enable index_merge used in transaction. (#29875) * logutil: add testcase for SlowQueryLogger.MaxDays/MaxSize/MaxBackups (#30316) * expression: fix data race in builtin_other_vec_generated_test.go (#30503) * expression: fix data race in the collationInfo (#30490) * planner/core, session: fix error message of wrong variable scope (#30510) * lightning: support Re/ReregisterMySQL by different tls name (#30463) * executor: TestBatchGetandPointGetwithHashPartition test typo (#29669) (#29671) * mockstore: improve log to avoid panic for nil pointer (#30513) * *: replace compareDatum by compare, PR 10 (#30456) * planner: Disable dynamic partition prune mode for all non-autocommit (#27532) (#30505) * expression: change the log level of an confusing log from warn to debug (#30484) * br: Check crypter.key valid before backup (#29991) * *: replace compareDatum by compare, PR 11 (#30465) * dumpling: fix default column collation with upstream when dump table (#30531) * server: fix prepared cursor select (#30285) * executor: HashJoinExec checks the buildError even if the probeSide is empty (#30471) * parser, expression: follow mysql, increase interval precedence (#30528) * makefile: set timeout 25m for make race (#30555) * planner: fix the unstable test TestAnalyzeGlobalStatsWithOpts/2 (#30576) * expression,types: Adjusts UNIX_TIMESTAMP() for non-existing DST values (#28739) (#30405) * br: add res.Body.close to avoid leak (#30545) * lightning: add back integration test lightning_error_summary (#30547) * sessionctx/variable: small refactor (split large file) (#30511) * ddl: let `admin cancel ddl jobs` run in a new transaction (#30549) * *: Retry when placement PutBundles failed (#30590) * dumpling: delete unit test in github actions (#30562) * *: support trace plan target='estimation' statement (#30491) * expression: migrate test-infra to testify for integration_test.go (#30548) * planner: support trace for min/max eliminate (#30441) * support min/max trace Signed-off-by: yisaer <disxiaofei@163.com> * address the comment Signed-off-by: yisaer <disxiaofei@163.com> Co-authored-by: Ti Chi Robot <ti-community-prow-bot@tidb.io> * br: remove cdclog in br (#30573) * *: show cmd to check if all needed histograms are loaded (#29672) * expression: clone repertoire when clone the scalar function (#30602) * *: use the real StateRemote interface implementation for cached table (#30066) * *: query failed after add index / timestamp out-of-range (#28424) (#29323) * planner: implement collecting predicate columns from logical plan (#29878) * *: show PK name when decoding the clustered index row key (#30623) * ddl/callback_test.go: migrate test-infra to testify (#30317) * *: Rename some names of placement ddl operation (#30622) * executor: fix data race in the index_lookup_hash_join (#30619) * ddl: remove unnecessary locking when adding an index (#29772) * server: try to make `TidbTestSuite` more stable (#30643) * *: Add some PD tests for placement and fix some bug found (#30621) * *: migrate sync.WaitGroup to util.WaitGroupWrapper (#30644) * planner: add trace for join eliminate rule (#30343) * executor: migrate test-infra to testify for executor/shuffle_test.go (#30514) * planner: make (*AccessPath).OnlyPointRange more succinct (#30520) * planner: add trace for join reorder (#30394) * executor: migrate test-infra to testify for executor/union_scan_test.go (#30525) * expression: make cast return error if cast binary literal to another character set (#30537) * *: update tikv client (#30670) * *: update sysutil in go.mod to fix panic when search log (#30523) * topsql: shouldn't evict the SQL meta, since the evicted SQL can be appear on Other components (TiKV) TopN records (#27050) * testify: migrate test-infra to testify for analyze_test.go (#30640) * util: replace compareDatum by compare, point part (#30575) * test: make all the tests run in serial (#30692) * statistics: add mutex for Handle.globalMap and Handle.feedback (#30550) * executor: fix regular expression in json so that it could match identifer start with '$' (#29750) * util/testkit/testkit.go: fix typo (#30638) * planner: Introduce a new global variable to control the historical statistics feature (#30646) * topsql: introduce datasink interface (#30662) * planner: unify the argument of stats functions to use SessionCtx instead of StatementContext (#30668) * metrics: fix the Max SafeTS Gap metrics (#30689) * lightning: Add source dir existence check for s3 (#30674) * golangci-lint: support durationcheck (#30027) * executor: fix data race on IndexHashJoin.cancelFunc (#30701) * sessionctx/variable: change tidb_store_limit to global only (#30522) * statistics: remove reassignment of Handle.pool in NewHandle (#30675) * br: fix some unstable unit test cases. (#30716) * bindinfo: fix the comment typo (#30616) * server: support decoding prepared string args to character_set_client (#30723) * expression: fix enum type join binary get wrong result (#30445) * cmd/explaintest: fix wrong result comparison for explain test (#30717) * parallel create tables in br * metrics: fix copr-cache metrics (#30712) * test: merge executor's serial tests to other tests (#30711) * ddl: add batch create table api Signed-off-by: xhe <xw897002528@gmail.com> * ddl: add unit tests Signed-off-by: xhe <xw897002528@gmail.com> * ddl: fix fmt Signed-off-by: xhe <xw897002528@gmail.com> * ddl: typo Co-authored-by: Arenatlx <ailinsilence4@gmail.com> * ddl: fix tests Signed-off-by: xhe <xw897002528@gmail.com> * ddl: rename to BatchCreateTableWithInfo Signed-off-by: xhe <xw897002528@gmail.com> * ddl: trace the error Signed-off-by: xhe <xw897002528@gmail.com> * ddl: comments Signed-off-by: xhe <xw897002528@gmail.com> * ddl: cancle the job right Signed-off-by: xhe <xw897002528@gmail.com> * ddl: cancel the job right 2 Signed-off-by: xhe <xw897002528@gmail.com> * ddl: report error if entry too large Signed-off-by: xhe <xw897002528@gmail.com> * ddl: report error when table is duplicated Signed-off-by: xhe <xw897002528@gmail.com> * ddl: go fmt Signed-off-by: xhe <xw897002528@gmail.com> * infoschema: improve batch memory perf Signed-off-by: xhe <xw897002528@gmail.com> * ddl: retain ID Signed-off-by: xhe <xw897002528@gmail.com> * ddl: reduce log frequency Signed-off-by: xhe <xw897002528@gmail.com> * ddl: fix tests Signed-off-by: xhe <xw897002528@gmail.com> * fix merge issue * fix issue that loss table restore * refactoring code * refactoring code Co-authored-by: Weizhen Wang <wangweizhen@pingcap.com> Co-authored-by: wangggong <793160615@qq.com> Co-authored-by: 王超 <cclcwangchao@hotmail.com> Co-authored-by: José Clovis Ramírez de la Rosa <clovis-@live.com> Co-authored-by: unconsolable <chenzhipeng2012@gmail.com> Co-authored-by: zhangguangchao 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Co-authored-by: Chengpeng Yan <41809508+Reminiscent@users.noreply.github.com> Co-authored-by: Arenatlx <314806019@qq.com> Co-authored-by: Meng Xin <tregoldmeng@gmail.com> Co-authored-by: Zhou Kunqin <25057648+time-and-fate@users.noreply.github.com> Co-authored-by: Youra Cho <espresso98@users.noreply.github.com> Co-authored-by: Yifan Xu <30385241+xuyifangreeneyes@users.noreply.github.com> Co-authored-by: Xiang Zhang <angwerzx@126.com> Co-authored-by: Lei Zhao <zlwgx1023@gmail.com> Co-authored-by: Daniël van Eeden <git@myname.nl> Co-authored-by: docsir <73268456+docsir@users.noreply.github.com> Co-authored-by: Morgan Tocker <tocker@gmail.com> Co-authored-by: jakevin <30525741+jackwener@users.noreply.github.com> Co-authored-by: 姬小野 <38575466+JameyWoo@users.noreply.github.com> Co-authored-by: you06 <you1474600@gmail.com> Co-authored-by: lance6716 <lance6716@gmail.com> Co-authored-by: TonsnakeLin <87681388+TonsnakeLin@users.noreply.github.com> Co-authored-by: imentu <imentu@foxmail.com> 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consider index column prefix length in skyline pruning

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Tracking issue for heuristic rules enhancement for index selection #26020

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xuyifangreeneyes added 2 commits November 25, 2021 13:14

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Merge branch 'master' into fix-issue-27313

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fmt; address comment; fix ut

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planner/util/path.go

}

}

func compareLength(l, r int) int {

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Add some comments to explain the return value.

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Merge branch 'master' into fix-issue-27313

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planner: consider prefix index column length in skyline pruning #27527

planner: consider prefix index column length in skyline pruning #27527

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	// c1 dominates c2 when each column of c2 exists in c1 and c2's column length is no longer than c1's column length.
	// dominates checks/tells ...

planner: consider prefix index column length in skyline pruning #27527

planner: consider prefix index column length in skyline pruning #27527

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xuyifangreeneyes commented Aug 24, 2021

What problem does this PR solve?

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