test

[BiteTheDDDDt]

What problem does this PR solve?

Issue Number: close #xxx

Related PR: #xxx

Problem Summary:

Release note

None

Check List (For Author)

• Test

  • Regression test
  • Unit Test
  • Manual test (add detailed scripts or steps below)
  • No need to test or manual test. Explain why:
    • This is a refactor/code format and no logic has been changed.
    • Previous test can cover this change.
    • No code files have been changed.
    • Other reason

• Behavior changed:

  • No.
  • Yes.

• Does this need documentation?

  • No.
  • Yes.

Check List (For Reviewer who merge this PR)

• Confirm the release note
• Confirm test cases
• Confirm document
• Add branch pick label

[hello-stephen]

Thank you for your contribution to Apache Doris.
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Please clearly describe your PR:

1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
2. Which behaviors were modified. What was the previous behavior, what is it now, why was it modified, and what possible impacts might there be.
3. What features were added. Why was this function added?
4. Which code was refactored and why was this part of the code refactored?
5. Which functions were optimized and what is the difference before and after the optimization?

[BiteTheDDDDt]

run buildall

[Copilot]

Pull request overview

This PR introduces a performance optimization for hash table operations in aggregation operators by implementing batch prefetching with a two-phase approach and removing an unnecessary conditional check for string hash maps.

Changes:

• Removed conditional is_string_hash_map() check before prefetching, enabling prefetch for all hash map types
• Added lazy_emplace_batch method with two-phase prefetch optimization for better cache utilization
• Updated aggregation operators to use batch emplace instead of loop-based single emplace

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
be/src/vec/common/hash_table/hash_map_context.h	Added batch emplace method with two-phase prefetching; removed is_string_hash_map() conditionals from prefetch calls
be/src/pipeline/exec/streaming_aggregation_operator.cpp	Updated to use lazy_emplace_batch for both limit and non-limit cases
be/src/pipeline/exec/aggregation_source_operator.cpp	Updated to use lazy_emplace_batch instead of loop-based emplace
be/src/pipeline/exec/aggregation_sink_operator.cpp	Updated to use lazy_emplace_batch for both limit and non-limit cases

---

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[Copilot]

Inconsistent code style: line 168 has the conditional and assignment on the same line, while lines 156-158 have them on separate lines. For consistency and readability, please format line 168 the same way as lines 156-158.

Suggested change

	if (current_row_ref) *current_row_ref = i;
	places[i] = *state.lazy_emplace_key(*hash_table, i, keys[i], hash_values[i], creator,
	creator_for_null_key);
	}
	if (current_row_ref)
	*current_row_ref = i;
	places[i] = *state.lazy_emplace_key(*hash_table, i, keys[i], hash_values[i], creator,
	creator_for_null_key);

[hello-stephen]

BE Regression && UT Coverage Report

Increment line coverage 100.00% (36/36) 🎉

Increment coverage report
Complete coverage report

Category	Coverage
Function Coverage	71.35% (26067/36532)
Line Coverage	54.09% (272628/504046)
Region Coverage	51.51% (227055/440788)
Branch Coverage	52.90% (97582/184462)

[hello-stephen]

BE Regression && UT Coverage Report

Increment line coverage 100.00% (36/36) 🎉

Increment coverage report
Complete coverage report

Category	Coverage
Function Coverage	71.44% (26100/36532)
Line Coverage	54.18% (273092/504046)
Region Coverage	51.63% (227581/440788)
Branch Coverage	53.00% (97765/184462)