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executor: fix the bug of step value overflow when split regions #23206

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@sourcelliu sourcelliu commented Mar 9, 2021

Signed-off-by: mantuliu [email protected]

What problem does this PR solve?

Issue Number: close #23159

Problem Summary:

What is changed and how it works?

How it Works:
Use math/big package.

Related changes

  • PR to update pingcap/docs/pingcap/docs-cn: no
  • Need to cherry-pick to the release branch: yes

Check List

Tests

  • Unit test
  • Integration test

Release note

  • Fix the bug of step value overflow when split regions.

@sourcelliu sourcelliu requested a review from a team as a code owner March 9, 2021 09:28
@sourcelliu sourcelliu requested review from wshwsh12 and removed request for a team March 9, 2021 09:28
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@ti-chi-bot ti-chi-bot added the size/M Denotes a PR that changes 30-99 lines, ignoring generated files. label Mar 9, 2021
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sre-bot commented Mar 9, 2021

Please follow PR Title Format:

  • pkg [, pkg2, pkg3]: what's changed

Or if the count of mainly changed packages are more than 3, use

  • *: what's changed

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sre-bot commented Mar 9, 2021

Please follow PR Title Format:

  • pkg [, pkg2, pkg3]: what's changed

Or if the count of mainly changed packages are more than 3, use

  • *: what's changed

@github-actions github-actions bot added the sig/execution SIG execution label Mar 9, 2021
@ichn-hu ichn-hu mentioned this pull request Mar 9, 2021
@sourcelliu sourcelliu changed the title Fix the bug of step value overflow when split regions executor: fix the bug of step value overflow when split regions Mar 10, 2021
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@wshwsh12 PTAL thanks.

handleCols: core.NewIntHandleCols(&expression.Column{RetType: types.NewFieldType(mysql.TypeLonglong)}),
lower: []types.Datum{types.NewDatum(-9223372036854775808)},
upper: []types.Datum{types.NewDatum(9223372036854775807)},
num: 4,
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What happens when REGIONS 1 is given?

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I add some edge test. And in the Integration Testing, the mysql client get the result:

mysql> create table if not exists `t1` (`id` bigint);
Query OK, 0 rows affected (0.00 sec)

mysql> split table `t1` between (-9223372036854775808) and (9223372036854775807) regions 1;
ERROR 1105 (HY000): Split table `t1` region step value should more than 1000, step -1 is invalid

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why close it? @mantuliu

@ti-chi-bot ti-chi-bot added the needs-rebase Indicates a PR cannot be merged because it has merge conflicts with HEAD. label Mar 16, 2021
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@mantuliu: PR needs rebase.

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 kubernetes/test-infra repository.

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@AilinKid #21277 fix it

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Step value overflowed on split command
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