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session: set process info before building plan (#22101) #22148

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merged 6 commits into from
Jan 26, 2021

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cherry-pick #22101 to release-4.0


What problem does this PR solve?

Issue Number: close #22068

Problem Summary:
Uncorrelated subqueries will execute once when building plan, and it maybe cost much time. So we set process info before building plan, to trace the running time and info.

What is changed and how it works?

Proposal: xxx

What's Changed:

How it Works:

Related changes

  • Need to cherry-pick to the release branch 4.0,5.0

Check List

Tests

  • Manual test (add detailed scripts or steps below)
    Session 1:
    select 1 from t where a = (select sleep(30));
    Session 2:
[tidb]> show processlist;
+------+------+-----------+------+---------+------+------------+----------------------------------------------+
| Id   | User | Host      | db   | Command | Time | State      | Info                                         |
+------+------+-----------+------+---------+------+------------+----------------------------------------------+
|    3 | root | 127.0.0.1 | test | Query   |    6 | autocommit | select 1 from t where a = (select sleep(30)) |
|    5 | root | 127.0.0.1 | NULL | Query   |    0 | autocommit | show processlist                             |
+------+------+-----------+------+---------+------+------------+----------------------------------------------+
2 rows in set (0.000 sec)

Side effects

Release note

  • Show process info when building plan.

Signed-off-by: ti-srebot <ti-srebot@pingcap.com>
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/run-all-tests

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@wshwsh12 you're already a collaborator in bot's repo.

@github-actions github-actions bot added the sig/sql-infra SIG: SQL Infra label Jan 7, 2021
@jebter jebter modified the milestones: v4.0.9, v4.0.10 Jan 7, 2021
@jebter jebter modified the milestones: v4.0.10, v4.0.11 Jan 18, 2021
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LGTM

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@qw4990, Thanks for your review. The bot only counts LGTMs from Reviewers and higher roles, but you're still welcome to leave your comments. See the corresponding SIG page for more information. Related SIG: sql-infra(slack).

@qw4990 qw4990 added status/PTAL and removed sig/sql-infra SIG: SQL Infra labels Jan 25, 2021
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LGTM

@ti-srebot ti-srebot added the status/LGT1 Indicates that a PR has LGTM 1. label Jan 25, 2021
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qw4990 commented Jan 25, 2021

PTAL @XuHuaiyu @lzmhhh123

zz-jason
zz-jason previously approved these changes Jan 25, 2021
@ti-srebot ti-srebot added status/LGT2 Indicates that a PR has LGTM 2. and removed status/LGT1 Indicates that a PR has LGTM 1. labels Jan 25, 2021
@github-actions github-actions bot added the sig/sql-infra SIG: SQL Infra label Jan 25, 2021
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/merge

@ti-srebot ti-srebot added the status/can-merge Indicates a PR has been approved by a committer. label Jan 25, 2021
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Your auto merge job has been accepted, waiting for:

  • 20981
  • 21323
  • 21329
  • 21404
  • 21443
  • 21473
  • 21477
  • 21582
  • 21593
  • 21602
  • 21604
  • 21610
  • 21623
  • 21635
  • 21958
  • 22116

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qw4990 commented Jan 26, 2021

@wshwsh12 Please resolve conflicts.

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@qw4990, Thanks for your review. The bot only counts LGTMs from Reviewers and higher roles, but you're still welcome to leave your comments. See the corresponding SIG page for more information. Related SIG: sql-infra(slack).

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qw4990 commented Jan 26, 2021

/merge

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Your auto merge job has been accepted, waiting for:

  • 21628
  • 21142
  • 21936
  • 21874
  • 20981
  • 21464
  • 21483
  • 21525
  • 21590
  • 21604
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  • 21673
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  • 21810
  • 22527

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/run-all-tests

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/run-all-tests

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qw4990 commented Jan 26, 2021

/merge

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qw4990 commented Jan 26, 2021

/merge

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Your auto merge job has been accepted, waiting for:

  • 21945
  • 22136
  • 22119
  • 21853
  • 22174
  • 21881
  • 22527
  • 22527

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/run-all-tests

@ti-srebot ti-srebot merged commit 6d0ffe4 into pingcap:release-4.0 Jan 26, 2021
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5 participants