feat: add codegen dispatch fallback for CometCast incompatible/unsupported cases (including legacy config paths) - #5079

Merged

comphead merged 9 commits into

apache:mainfrom

comphead:cometcast-codegen-fallback

Jul 29, 2026

Commits on Jul 29, 2026

feat: route CometCast through codegen dispatcher for legacy config paths
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test: drop expect_fallback markers from non-legacy cast_complex_types_to_string
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fix: restore query directive and refresh Map header in cast_complex_types_to_string
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test: run cast_string_to_date_time_parser_policy_legacy with plain query mode
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test: update explain-comet expectations for CalendarInterval cast via codegen dispatch
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address comments
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test(spark-diff): allow Comet plan in VariantEndToEndSuite codegen assertion
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address today's review comments
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refactor(cast): dedupe VariantType guard and trim redundant prose
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