fix(server): avoid extracting text range filters

[LegendPei]

Purpose of the PR

• close [Bug] Unexpected ArrayIndexOutOfBoundsException for filter-step and repeat()-step #2935

This PR fixes the query-planning path exposed by #2935.

For top-level traversals like g.V().has("vp4", P.lt("")).repeat(...).count(),
HugeGraph may extract the text range predicate into a backend query. However,
range predicates on text properties should not be planned as backend range
index queries. This can make the direct traversal fail while an equivalent
match() traversal returns normally.

This change keeps such text range predicates in the traversal layer instead of
pushing them down to the backend query, making the direct traversal consistent
with the equivalent match() form.

Main Changes

• Avoid extracting Text property predicates with gt/gte/lt/lte into
  HugeGraphStep / HugeVertexStep backend queries.
• Preserve normal extraction for system properties and non-text property
  predicates.
• Add a regression test for the reported traversal shape:
  has("vp4", P.lt("")).repeat(__.out("el2")).emit().times(1).count().
• Verify that the direct traversal returns the same result as the equivalent
  match() traversal.

Verifying these changes

• Trivial rework / code cleanup without any test coverage. (No Need)
• Already covered by existing tests, such as (please modify tests here).
• Need tests and can be verified as follows:
  - mvn -pl hugegraph-server/hugegraph-test -am -P core-test,memory -Dtest=CountStrategyCoreTest#testRepeatAfterTextRangeFilterWithEmptyResult -DfailIfNoTests=false "-Drat.skip=true" "-Dcheckstyle.skip=true" test
  • mvn -pl hugegraph-server/hugegraph-test -am -P core-test,rocksdb -Dtest=CountStrategyCoreTest#testRepeatAfterTextRangeFilterWithEmptyResult -DfailIfNoTests=false "-Drat.skip=true" "-Dcheckstyle.skip=true" test

Does this PR potentially affect the following parts?

• Dependencies (add/update license info & regenerate_known_dependencies.sh)
• Modify configurations
• The public API
• Other affects (typed here)
• Nope

Documentation Status

• Doc - TODO
• Doc - Done
• Doc - No Need

[Copilot]

Pull request overview

Fixes a traversal query-planning bug where range predicates (gt/gte/lt/lte) on Text properties were being extracted/pushed down into backend queries, leading to incorrect behavior (and the exception reported in #2935). The change keeps these text range predicates in the traversal layer while adding a regression test to ensure direct traversals behave consistently with equivalent match() traversals.

Changes:

• Prevent extraction of HasStep containers when they include range comparisons on Text properties.
• Keep existing extraction behavior for system properties and non-text property predicates (intended).
• Add a regression test reproducing the traversal shape from #2935 and asserting consistent results between direct and match() forms.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/traversal/optimize/TraversalUtil.java	Adds a guard to stop extracting HasContainers with text range predicates into backend query steps.
hugegraph-server/hugegraph-test/src/main/java/org/apache/hugegraph/core/CountStrategyCoreTest.java	Adds a regression test covering a text range filter followed by repeat(...).emit().times(1).count().

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.25%. Comparing base (454dd3d) to head (a361614).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@              Coverage Diff              @@
##             master    #3034       +/-   ##
=============================================
+ Coverage     35.94%   93.25%   +57.31%     
+ Complexity      338       65      -273     
=============================================
  Files           803        9      -794     
  Lines         68053      267    -67786     
  Branches       8907       22     -8885     
=============================================
- Hits          24460      249    -24211     
+ Misses        40968        8    -40960     
+ Partials       2625       10     -2615     

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

[imbajin]

The original correctness fix is clear, but the latest version now broadens the PR into a more aggressive HasStep split-and-remove optimization. I left one scope/risk comment suggesting we keep this PR on the minimal safe path and move the broader optimization to a follow-up.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

[imbajin]

The current patch looks scoped back to the safer minimal fix. I left three non-blocking test-coverage suggestions to better guard the text-range extraction behavior and related fallback paths.