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Issues: pingcap/tidb

RFC: reorganize packages layout for this repository
#41241 opened Feb 9, 2023 by bb7133
Open 17
flaky test list
#41316 opened Feb 12, 2023 by hawkingrei
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Issues list

planner: NDV used in join cardinality estimation is over-estimated in some cases epic/cardinality-estimation the optimizer cardinality estimation sig/planner SIG: Planner type/enhancement The issue or PR belongs to an enhancement.
#36475 opened Jul 22, 2022 by qw4990
planner: consider partition pruning when estimating partition table row counts component/statistics epic/cardinality-estimation the optimizer cardinality estimation sig/planner SIG: Planner type/enhancement The issue or PR belongs to an enhancement.
#36977 opened Aug 9, 2022 by qw4990
Planner doesn't estimate local aggregate cardinality properly epic/cardinality-estimation the optimizer cardinality estimation severity/moderate sig/planner SIG: Planner type/bug The issue is confirmed as a bug.
#35420 opened Jun 16, 2022 by fixdb
@qw4990 @time-and-fate
Consider filter condition of index access path in skyline pruning epic/cardinality-estimation the optimizer cardinality estimation sig/planner SIG: Planner type/enhancement The issue or PR belongs to an enhancement.
#37689 opened Sep 7, 2022 by time-and-fate
@qw4990
1
planner: cardinality estimation on TPCC customer is not accurate enough epic/cardinality-estimation the optimizer cardinality estimation sig/planner SIG: Planner type/enhancement The issue or PR belongs to an enhancement.
#39636 opened Dec 5, 2022 by qw4990
wrong estimation causing wrong plan in TPCDS epic/cardinality-estimation the optimizer cardinality estimation sig/planner SIG: Planner type/enhancement The issue or PR belongs to an enhancement.
#39520 opened Nov 30, 2022 by qw4990
wrong estimation causing wrong plan in TPCC epic/cardinality-estimation the optimizer cardinality estimation sig/planner SIG: Planner type/enhancement The issue or PR belongs to an enhancement.
#39519 opened Nov 30, 2022 by qw4990
wrong estimation causing wrong plan for CH workload epic/cardinality-estimation the optimizer cardinality estimation sig/planner SIG: Planner type/enhancement The issue or PR belongs to an enhancement.
#39492 opened Nov 30, 2022 by dbsid
@qw4990
1
estRows differs significantly from actRows epic/cardinality-estimation the optimizer cardinality estimation sig/planner SIG: Planner type/enhancement The issue or PR belongs to an enhancement.
#39762 opened Dec 8, 2022 by Mini256
@time-and-fate
planner: unexpected cardinality estimation results epic/cardinality-estimation the optimizer cardinality estimation may-affects-5.1 This bug maybe affects 5.1.x versions. may-affects-5.2 This bug maybe affects 5.2.x versions. may-affects-5.3 This bug maybe affects 5.3.x versions. may-affects-5.4 This bug maybe affects 5.4.x versions. may-affects-6.1 may-affects-6.5 may-affects-7.1 severity/moderate sig/planner SIG: Planner type/bug The issue is confirmed as a bug.
#44376 opened Jun 2, 2023 by qw4990
@qw4990 @time-and-fate
2
Using Limit to replace Topn when estrows is small. affects-7.1 affects-8.1 epic/cardinality-estimation the optimizer cardinality estimation epic/cost-model the optimizer cost model found/gs found by gs sig/planner SIG: Planner type/enhancement The issue or PR belongs to an enhancement.
#46925 opened Sep 12, 2023 by King-Dylan
@chrysan @qw4990
4
planner: large outer-join cardinality estimation error when there are multiple join keys epic/cardinality-estimation the optimizer cardinality estimation found/gs found by gs sig/planner SIG: Planner type/enhancement The issue or PR belongs to an enhancement.
#49893 opened Dec 28, 2023 by qw4990
@qw4990 @time-and-fate
2
planner: prevent the optimizer from using different versions of stats of a table during optimization component/statistics epic/cardinality-estimation the optimizer cardinality estimation sig/planner SIG: Planner type/enhancement The issue or PR belongs to an enhancement.
#50281 opened Jan 10, 2024 by qw4990
planner: large cardinality estimation error for IndexJoin with IndexLookup when join estimation is zero affects-8.1 epic/cardinality-estimation the optimizer cardinality estimation report/customer Customers have encountered this bug. sig/planner SIG: Planner type/enhancement The issue or PR belongs to an enhancement.
#51379 opened Feb 28, 2024 by qw4990
2
Wrong estimated row count for _tidb_rowid affects-5.4 This bug affects 5.4.x versions. affects-6.1 affects-6.5 affects-7.1 affects-7.5 affects-8.1 epic/cardinality-estimation the optimizer cardinality estimation report/customer Customers have encountered this bug. sig/planner SIG: Planner type/enhancement The issue or PR belongs to an enhancement.
#51098 opened Feb 13, 2024 by djshow832
@hawkingrei
3
unexpected estimate row count using distinct epic/cardinality-estimation the optimizer cardinality estimation fuzz/randomtest severity/minor sig/planner SIG: Planner type/bug The issue is confirmed as a bug.
#51229 opened Feb 21, 2024 by wjhuang2016
@time-and-fate
incorrect row estimation in having clause epic/cardinality-estimation the optimizer cardinality estimation fuzz/randomtest severity/moderate sig/planner SIG: Planner type/bug The issue is confirmed as a bug.
#51280 opened Feb 23, 2024 by wjhuang2016
@time-and-fate
1
The estRows is wrong if SQL is executed multiple times epic/cardinality-estimation the optimizer cardinality estimation may-affects-5.4 This bug maybe affects 5.4.x versions. may-affects-6.1 may-affects-6.5 may-affects-7.1 may-affects-7.5 may-affects-8.1 severity/moderate sig/planner SIG: Planner type/bug The issue is confirmed as a bug.
#53119 opened May 9, 2024 by yedushusheng
@hawkingrei
1
planner: NDV estimation formula is too naive affects-5.4 This bug affects 5.4.x versions. affects-6.1 affects-6.5 affects-7.1 affects-7.5 affects-8.1 epic/cardinality-estimation the optimizer cardinality estimation report/customer Customers have encountered this bug. sig/planner SIG: Planner type/enhancement The issue or PR belongs to an enhancement.
#54812 opened Jul 22, 2024 by qw4990
1
Planner should consider specified partition when caculate estRows epic/cardinality-estimation the optimizer cardinality estimation sig/planner SIG: Planner type/enhancement The issue or PR belongs to an enhancement.
#53657 opened May 29, 2024 by Defined2014
1
ProTip! Find all open issues with in progress development work with linked:pr.