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*: reduce dumpling accessing database and information_schema usage to improve its stability (#305) #313

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This is an automated cherry-pick of #305

What problem does this PR solve?

fix #298 and fix #296 and fix #310

What is changed and how it works?

  1. Try to dump the whole table directly if we meet some errors when we try to split tables into several chunks. cfb258a

  2. Reduce accessing SelectedField and SelectedLen info from database d3ba1e8

  3. Remove the usage of information_schema 1a0d9c4, 7f7cf58, b333bea, 088b5ba, 7dac228, bdb3c26

  4. Fix the bug that dumpling finishedRows is not accurate if we retry in chunks. ff398a4

  5. Fix the bug that dumpling dumps unlocked tables for consistency lock 7f7cf58

  6. Fix the bug of no-schema argument's wrong output 09d257d

Check List

Tests

  • Unit test
  • Integration test

Side effects

  • Increased code complexity

Related changes

  • Need to cherry-pick to the release branch

Release note

  • reduce dumpling accessing database and information_schema usage and improve dumpling's stability

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@lichunzhu lichunzhu left a comment

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LGTM

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[REVIEW NOTIFICATION]

This pull request has been approved by:

  • lichunzhu

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/merge

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

Commit hash: 1bd7db8

@ti-chi-bot ti-chi-bot merged commit 2b23ba5 into pingcap:release-4.0 Jul 16, 2021
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3 participants