[pull] main from apache:main

[pull]

See Commits and Changes for more details.

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Created by pull[bot] (v2.0.0-alpha.1)

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Summary by Sourcery

Improve DataFusion's projection and distribution optimization with performance enhancements and new test coverage

Enhancements:

• Refactored is_projection_unnecessary function to improve performance and accuracy of projection checks
• Modified replace_order_preserving_variants to preserve fetch parameter when transforming execution plans

Tests:

• Added a new test for replacing order-preserving merge variants with coalesce partitions
• Introduced a benchmark to compare performance of projection unnecessary checks

Chores:

• Updated Cargo.toml to include criterion for benchmarking
• Added a new benchmark file for projection unnecessary checks

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Reviewer's Guide by Sourcery

This pull request includes changes to the is_projection_unnecessary function in datafusion/optimizer/src/optimize_projections/mod.rs to improve its efficiency and correctness. It also adds a test case to verify that SortPreservingMergeExec with fetch is correctly transformed to CoalescePartitionsExec and that the fetch value is preserved. Finally, a benchmark is added to compare the performance of the old and new is_projection_unnecessary functions.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Added a test case to verify that SortPreservingMergeExec with fetch is correctly transformed to CoalescePartitionsExec and that the fetch value is preserved.	Added a new test function test_replace_order_preserving_variants_with_fetch. Created a base plan with parquet_exec. Created a SortPreservingMergeExec with fetch=5. Created a DistributionContext. Applied the replace_order_preserving_variants function. Verified that the plan was transformed to CoalescePartitionsExec. Verified that the fetch value was preserved after the transformation.	datafusion/core/tests/physical_optimizer/enforce_distribution.rs
Refactored the is_projection_unnecessary function to improve its efficiency and correctness.	Modified the is_projection_unnecessary function to first check if the number of expressions is equal to the number of fields in the input schema. Modified the is_projection_unnecessary function to check if each expression is a column and if it matches the field name and relation. Removed the check for trivial expressions. Removed the call to projection_schema.	datafusion/optimizer/src/optimize_projections/mod.rs
Exposed the replace_order_preserving_variants function as public.	Changed the visibility of the replace_order_preserving_variants function to public.	datafusion/physical-optimizer/src/enforce_distribution.rs
Modified the replace_order_preserving_variants function to preserve the fetch value when transforming to CoalescePartitionsExec.	Modified the replace_order_preserving_variants function to use with_fetch when creating the CoalescePartitionsExec.	datafusion/physical-optimizer/src/enforce_distribution.rs
Added a benchmark to compare the performance of the old and new is_projection_unnecessary functions.	Added a new benchmark file datafusion/optimizer/benches/projection_unnecessary.rs. Created a function create_plan_with_many_exprs to create a logical plan with many expressions. Created a benchmark group projection_unnecessary_comparison. Added benchmarks for both the old and new is_projection_unnecessary functions.	datafusion/optimizer/Cargo.toml datafusion/optimizer/benches/projection_unnecessary.rs

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