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expression: pushdown substring/char_length to tikv #30191

Merged
merged 17 commits into from
Dec 30, 2021
Merged

expression: pushdown substring/char_length to tikv #30191

merged 17 commits into from
Dec 30, 2021

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guo-shaoge
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@guo-shaoge guo-shaoge commented Nov 27, 2021 •
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Signed-off-by: guo-shaoge shaoge1994@163.com

What problem does this PR solve?

Issue Number: close #31125 #30200

Problem Summary:

What is changed and how it works?

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

  • Affects user behaviors
  • Contains syntax changes
  • Contains variable changes
  • Contains experimental features
  • Changes MySQL compatibility

Release note

expression: pushdown substring/substr/mid/char_length to tikv

@guo-shaoge
expression: pushdown substring
4d3bd77 
Signed-off-by: guo-shaoge <shaoge1994@163.com>
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ti-chi-bot commented Nov 27, 2021 •
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[REVIEW NOTIFICATION]

This pull request has been approved by:

  • ichn-hu
  • wshwsh12

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment.
After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

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@ti-chi-bot ti-chi-bot added release-note Denotes a PR that will be considered when it comes time to generate release notes. needs-rebase Indicates a PR cannot be merged because it has merge conflicts with HEAD. size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. labels Nov 27, 2021
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/run-integration-copr-test tikv=pr/11494

@guo-shaoge
Merge branch 'master' of https://github.com/pingcap/tidb into pushdow…
b9409b3 
…n_substring

Signed-off-by: guo-shaoge <shaoge1994@163.com>

Conflicts:
	expression/expression.go
@guo-shaoge
fix case
316c119 
Signed-off-by: guo-shaoge <shaoge1994@163.com>
@ti-chi-bot ti-chi-bot added size/S Denotes a PR that changes 10-29 lines, ignoring generated files. and removed needs-rebase Indicates a PR cannot be merged because it has merge conflicts with HEAD. size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. labels Nov 27, 2021
@guo-shaoge
fix case
86ef769 
Signed-off-by: guo-shaoge <shaoge1994@163.com>
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/run-check_dev_2

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fix case
3f4bdd7 
Signed-off-by: guo-shaoge <shaoge1994@163.com>
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/run-check_dev_2

wjhuang2016
wjhuang2016 reviewed Nov 29, 2021
View reviewed changes
expression/expression.go Outdated
@@ -966,7 +966,7 @@ func scalarExprSupportedByTiKV(sf *ScalarFunction) bool {

// string functions.
ast.Length, ast.BitLength, ast.Concat, ast.ConcatWS /*ast.Locate,*/, ast.Replace, ast.ASCII, ast.Hex,
ast.Reverse, ast.LTrim, ast.RTrim /*ast.Left,*/, ast.Strcmp, ast.Space, ast.Elt, ast.Field,
ast.Reverse, ast.LTrim, ast.RTrim /*ast.Left,*/, ast.Strcmp, ast.Space, ast.Elt, ast.Field, ast.Substring,
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How about MID() and SubStr() ?

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done

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Related tikv pr: tikv/tikv#11494

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fix comment
550e22e 
fixSigned-off-by: guo-shaoge <shaoge1994@163.com>
@ti-chi-bot ti-chi-bot added size/M Denotes a PR that changes 30-99 lines, ignoring generated files. and removed size/S Denotes a PR that changes 10-29 lines, ignoring generated files. labels Dec 29, 2021
@ti-chi-bot ti-chi-bot added size/L Denotes a PR that changes 100-499 lines, ignoring generated files. and removed size/M Denotes a PR that changes 30-99 lines, ignoring generated files. labels Dec 29, 2021
guo-shaoge
guo-shaoge commented Dec 29, 2021
View reviewed changes
expression/integration_test.go
@@ -3472,36 +3472,36 @@ func TestExprPushdown(t *testing.T) {
"(4,'511111','611',7,8,9),(5,'611111','711',8,9,10)")

// case 1, index scan without double read, some filters can not be pushed to cop task
rows := tk.MustQuery("explain format = 'brief' select col2, col1 from t use index(key1) where col2 like '5%' and substr(col1, 1, 1) = '4'").Rows()
rows := tk.MustQuery("explain format = 'brief' select col2, col1 from t use index(key1) where col2 like '5%' and from_base64(to_base64(substr(col1, 1, 1))) = '4'").Rows()
require.Equal(t, "root", fmt.Sprintf("%v", rows[1][2]))
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from_base64 and to_base64 has no plan to pushdown for now...

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this looks so dirty...

@guo-shaoge guo-shaoge changed the title expression: pushdown substring to tikv expression: pushdown substring/char_length to tikv Dec 29, 2021
@guo-shaoge
fix fmt
0a51af1 
Signed-off-by: guo-shaoge <shaoge1994@163.com>
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/run-check_dev_2

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/run-unit-test

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sre-bot commented Dec 29, 2021 •
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Code Coverage Details: https://codecov.io/github/pingcap/tidb/commit/57107673fb2ae57f791f85f8c09c974564b3c5fb

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/run-check_dev_2

@ti-chi-bot ti-chi-bot added the status/LGT1 Indicates that a PR has LGTM 1. label Dec 30, 2021
@ti-chi-bot ti-chi-bot added status/LGT2 Indicates that a PR has LGTM 2. and removed status/LGT1 Indicates that a PR has LGTM 1. labels Dec 30, 2021
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/merge

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

Commit hash: 43203b7

@ti-chi-bot ti-chi-bot added the status/can-merge Indicates a PR has been approved by a committer. label Dec 30, 2021
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/run-unit-test

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/run-unit-test

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@guo-shaoge: Your PR was out of date, I have automatically updated it for you.

At the same time I will also trigger all tests for you:

/run-all-tests

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.

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/run-mysql-test

@ti-chi-bot ti-chi-bot merged commit 7f85091 into pingcap:master Dec 30, 2021
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@ichn-hu ichn-hu ichn-hu approved these changes

@wshwsh12 wshwsh12 wshwsh12 approved these changes

@wjhuang2016 wjhuang2016 Awaiting requested review from wjhuang2016

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Pushdown substring/substr/mid/char_length to TiKV
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@guo-shaoge @ti-chi-bot @sre-bot @wshwsh12 @wjhuang2016 @ichn-hu