enhance: type-aware bidirectional in/== or expression rewriting

[zhengbuqian]

Replace the fixed threshold (150) for merging == or into in[] with type-specific thresholds based on benchmark data:

• INT types: use in[] when N >= 10 (== or is faster below due to simpler execution path)
• FLOAT types: use in[] when N >= 15 (float hash is more expensive)
• Other types (varchar, bool): use in[] when N >= 3

The rewriting is now bidirectional:

• == or → in[]: when shouldUseInExpr returns true (existing direction)
• in[] → == or: when shouldUseInExpr returns false (new direction, via visitTermExpr)
• not in → != and: when shouldUseInExpr returns false (new, via visitUnaryExpr)

Both directions use the same shouldUseInExpr function to ensure consistency.

issue: #45525

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: zhengbuqian

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Details

Needs approval from an approver in each of these files:

• OWNERS [zhengbuqian]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[sre-ci-robot]

[ci-v2-notice]
Notice: New ci-v2 system is enabled for this PR.

To rerun ci-v2 checks, comment with:

• /ci-rerun-code-check // for ci-v2/code-check
• /ci-rerun-build // for ci-v2/build
• /ci-rerun-build-all // for ci-v2/build-all (multi-arch builds)
• /ci-rerun-buildenv // for ci-v2/build-env (build milvus-env builder images)
• /ci-rerun-ut-integration // for ci-v2/ut-integration, will rerun ci-v2/build
• /ci-rerun-ut-go // for ci-v2/ut-go, will rerun ci-v2/build
• /ci-rerun-ut-cpp // for ci-v2/ut-cpp
• /ci-rerun-ut // for all ci-v2/ut-integration, ci-v2/ut-go, ci-v2/ut-cpp, will rerun ci-v2/build
• /ci-rerun-e2e-arm // for ci-v2/e2e-arm
• /ci-rerun-e2e-default // for ci-v2/e2e-default
• /ci-rerun-ciloop // for ci-v2/ciloop (build + unit tests in one pipeline)
• /ci-rerun-gosdk // for ci-v2/go-sdk (Go SDK E2E tests, AMD)
• /ci-rerun-gosdk-arm // for ci-v2/go-sdk-arm (Go SDK E2E tests, ARM)

If you have any questions or requests, please contact @zhikunyao.

[codecov]

Codecov Report

❌ Patch coverage is 97.36842% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.76%. Comparing base (9ee6fce) to head (11c395c).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/parser/planparserv2/rewriter/util.go	84.61%	2 Missing ⚠️
internal/parser/planparserv2/rewriter/term_in.go	98.61%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #48544      +/-   ##
==========================================
- Coverage   77.82%   77.76%   -0.07%     
==========================================
  Files        2112     2112              
  Lines      354195   354294      +99     
==========================================
- Hits       275665   275517     -148     
- Misses      70202    70415     +213     
- Partials     8328     8362      +34     

Components	Coverage Δ
Client	79.25% <ø> (ø)
Core	84.30% <100.00%> (-0.03%)	⬇️
Go	75.80% <96.90%> (-0.09%)	⬇️

Files with missing lines	Coverage Δ
...rnal/core/unittest/test_expr_materialized_view.cpp	97.94% <100.00%> (+0.05%)	⬆️
internal/parser/planparserv2/rewriter/entry.go	88.26% <100.00%> (+0.84%)	⬆️
internal/parser/planparserv2/rewriter/term_in.go	93.68% <98.61%> (+2.44%)	⬆️
internal/parser/planparserv2/rewriter/util.go	68.75% <84.61%> (-0.70%)	⬇️

... and 52 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[zhengbuqian]

/ci-rerun-ut-go

[zhengbuqian]

/ci-rerun-e2e-default