importinto/lightning: check max row size when parsing csv to avoid OOM (#58592)

[ti-chi-bot]

This is an automated cherry-pick of #58592

What problem does this PR solve?

Issue Number: close #58590

Problem Summary:

What changed and how does it work?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)

import a file with 20 fields, each field is about 10+M, total row size is about 266M

mysql> import into t from '/playground/lightning/single-file/long-row.csv';
ERROR 1105 (HY000): size of row cannot exceed the max value of txn-entry-size-limit
mysql>

• No need to test

  • I checked and no code files have been changed.

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

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-8.1@61d7f3c). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-8.1     #62126   +/-   ##
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  Coverage               ?   71.3908%           
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  Files                  ?       1469           
  Lines                  ?     425455           
  Branches               ?          0           
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  Hits                   ?     303736           
  Misses                 ?     101209           
  Partials               ?      20510           

Flag	Coverage Δ
unit	71.3908% <100.0000%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	52.9656% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	41.6210% <0.0000%> (?)

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[Benjamin2037]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Benjamin2037, D3Hunter

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• pkg/lightning/OWNERS [Benjamin2037,D3Hunter]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-07-02 06:59:00.259531836 +0000 UTC m=+1464592.982710841: ☑️ agreed by D3Hunter.
• 2025-07-02 06:59:33.410503878 +0000 UTC m=+1464626.133682860: ☑️ agreed by Benjamin2037.

[joechenrh]

/retest