[Enhancement] add trino function map_agg

[guoxiaolongzte]

Why I'm doing:

When using the Trino dialect, the map_agg function is not supported.

https://trino.io/docs/385/functions/aggregate.html?highlight=map_agg#map_agg

What I'm doing:

map_agg(key, value) -> map_from_arrays(array_agg(key), array_agg(value))

support the map_agg function.

Fixes #issue

What type of PR is this:

• BugFix
• Feature
• Enhancement
• Refactor
• UT
• Doc
• Tool

Does this PR entail a change in behavior?

• Yes, this PR will result in a change in behavior.
• No, this PR will not result in a change in behavior.

If yes, please specify the type of change:

• Interface/UI changes: syntax, type conversion, expression evaluation, display information
• Parameter changes: default values, similar parameters but with different default values
• Policy changes: use new policy to replace old one, functionality automatically enabled
• Feature removed
• Miscellaneous: upgrade & downgrade compatibility, etc.

Checklist:

• I have added test cases for my bug fix or my new feature
• This pr needs user documentation (for new or modified features or behaviors)
  • I have added documentation for my new feature or new function
• This is a backport pr

Bugfix cherry-pick branch check:

• [x ] I have checked the version labels which the pr will be auto-backported to the target branch
  • 4.0
  • 3.5
  • 3.4
  • 3.3

---

Note

Adds Trino map_agg(key, value) support by rewriting to map_from_arrays(array_agg(key), array_agg(value)) and includes a unit test.

• Trino function transformation:
  • In fe/fe-core/src/main/java/com/starrocks/connector/parser/trino/ComplexFunctionCallTransformer.java:
    • Add support for map_agg(key, value) -> map_from_arrays(array_agg(key), array_agg(value)) with arg count validation.
• Tests:
  • In fe/fe-core/src/test/java/com/starrocks/connector/parser/trino/TrinoFunctionTransformTest.java:
    • Add testMapFunction asserting transformation to array_agg('key'), array_agg('value') and map_from_arrays(...).

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[alvin-celerdata]

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✅ Bugbot reviewed your changes and found no bugs!

---

[sonarqubecloud]

Quality Gate failed

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C Maintainability Rating on New Code (required ≥ A)

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[github-actions]

[Java-Extensions Incremental Coverage Report]

✅ pass : 0 / 0 (0%)

[github-actions]

[FE Incremental Coverage Report]

✅ pass : 5 / 6 (83.33%)

file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
🔵	com/starrocks/connector/parser/trino/ComplexFunctionCallTransformer.java	5	6	83.33%	[129]

[github-actions]

[BE Incremental Coverage Report]

✅ pass : 0 / 0 (0%)

[github-actions]

@Mergifyio backport branch-4.0

[github-actions]

@Mergifyio backport branch-3.3

[github-actions]

@Mergifyio backport branch-3.4

[github-actions]

@Mergifyio backport branch-3.5

[mergify]

backport branch-4.0

✅ Backports have been created

Details

• #67397 [Enhancement] add trino function map_agg (backport #66673) has been created for branch branch-4.0

[mergify]

backport branch-3.3

✅ Backports have been created

Details

• #67398 [Enhancement] add trino function map_agg (backport #66673) has been created for branch branch-3.3

[mergify]

backport branch-3.4

✅ Backports have been created

Details

• #67399 [Enhancement] add trino function map_agg (backport #66673) has been created for branch branch-3.4

[mergify]

backport branch-3.5

✅ Backports have been created

Details

• #67400 [Enhancement] add trino function map_agg (backport #66673) has been created for branch branch-3.5