Make Physical CastExpr Field-aware and unify cast semantics across physical expressions#20814

Merged

kosiew merged 10 commits intoapache:mainfrom

kosiew:cast-01-20164

Mar 10, 2026

Commits on Mar 9, 2026

Refactor cast ordering and column resolution logic
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feat: refactor CastExpr to use target_field for type casting
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Refactor CastExpr and schema rewriter
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Refactor CastExpr to use FieldRef target
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Refactor cast implementation for clarity
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Clarify column resolution logic in DefaultPhysicalExprAdapterRewriter
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comment:helper for substituting cast expressions in ordering equivalence
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Enhance CastExpr constructors with detailed documentation on usage and field metadata handling
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Rename is_legacy_target_field to is_default_target_field for clarity in CastExpr
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Refine nullability logic in CastExpr to account for child expression's nullability and update related tests for accuracy
kosiew
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