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expression, executor: allow insert strings with overflowed trailing spaces (#20987) #21282

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merged 5 commits into from
Nov 25, 2020

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cherry-pick #20987 to release-4.0


What problem does this PR solve?

Issue Number: close #10392

Problem Summary:

For now, TiDB will complain with error if string inserted are longer than varchar or char's lenght constraint with trailing spaces, however, as in MySQL's doc

For VARCHAR columns, trailing spaces in excess of the column length are truncated prior to insertion and a warning is generated, regardless of the SQL mode in use. For CHAR columns, truncation of excess trailing spaces from inserted values is performed silently regardless of the SQL mode.

https://dev.mysql.com/doc/refman/8.0/en/char.html

What is changed and how it works?

Make overflowed trailing spaces trimed, and report warning for varchar.

Proposal: xxx

What's Changed:

How it Works:

Related changes

  • Need to cherry-pick to the release branch 4.0, 3.0.

Check List

Tests

  • Integration test

Side effects

N/A

Release note

  • No release note

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

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@ichn-hu you're already a collaborator in bot's repo.

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LGTM

@ti-srebot ti-srebot added the status/LGT1 Indicates that a PR has LGTM 1. label Nov 25, 2020
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ichn-hu commented Nov 25, 2020

/run-all-tests

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LGTM

@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 Nov 25, 2020
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/merge

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Your auto merge job has been accepted, waiting for:

  • 21292

@ti-srebot ti-srebot added the status/can-merge Indicates a PR has been approved by a committer. label Nov 25, 2020
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ichn-hu commented Nov 25, 2020

/merge

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Your auto merge job has been accepted, waiting for:

  • 21292

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ichn-hu commented Nov 25, 2020

/merge

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Your auto merge job has been accepted, waiting for:

  • 21292

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/run-all-tests

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@ti-srebot merge failed.

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/run-all-tests

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@ti-srebot merge failed.

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/run-all-tests

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3 participants