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Storages: Skip filtering for filter column (#9361) #9481

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This is an automated cherry-pick of #9361

What problem does this PR solve?

Issue Number: close #9348, ref #9103

Problem Summary:

If Min-Max index returns RSResult::All, we will create a EMPTY filter column to make some checks on block structure happy.

if (block.getRSResult().allMatch())
{
block.insert(
filter_column,
header.safeGetByPosition(filter_column)); // Make some checks on block structure happy.
if (return_filter)
res_filter = nullptr;
return true;
}

In LateMaterializationBlockInputStream, filter_column_stream does not execute projecting to remove filter column, and will execute filtering in

for (auto & col : filter_column_block)
{
col.column = col.column->filter(col_filter, passed_count);
}

This result issue #9348.

What is changed and how it works?

Skip filtering for filter column as

for (auto & col : filter_column_block)
{
if (col.name == filter_column_name)
continue;
col.column = col.column->filter(*filter, passed_count);

Add add unit-test for this case.


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

None

Signed-off-by: ti-chi-bot <ti-community-prow-bot@tidb.io>
@ti-chi-bot ti-chi-bot added release-note-none Denotes a PR that doesn't merit a release note. size/L Denotes a PR that changes 100-499 lines, ignoring generated files. type/cherry-pick-for-release-8.1 This PR is cherry-picked to release-8.1 from a source PR. labels Sep 27, 2024
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ti-chi-bot bot commented Sep 27, 2024

This cherry pick PR is for a release branch and has not yet been approved by triage owners.
Adding the do-not-merge/cherry-pick-not-approved label.

To merge this cherry pick:

  1. It must be approved by the approvers firstly.
  2. AFTER it has been approved by approvers, please wait for the cherry-pick merging approval from triage owners.

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ti-chi-bot bot commented Sep 27, 2024

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign hongyunyan for approval. For more information see the Code Review Process.

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ti-chi-bot bot commented Sep 27, 2024

@ti-chi-bot: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name Commit Details Required Rerun command
pull-unit-test d3f204a link true /test pull-unit-test

Full PR test history. Your PR dashboard.

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3 participants