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[core] Fix IS NAN predicate failing with file index - #9143

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ArnavBalyan:arnavb/fix-nanpredicate
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[core] Fix IS NAN predicate failing with file index#9143
ArnavBalyan wants to merge 1 commit into
apache:masterfrom
ArnavBalyan:arnavb/fix-nanpredicate

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Purpose

  • IsNan predicates throws UnsupportedOperationException when the filtered column has a file index.
  • This is because FileIndexReader does not handle visitIsNaN
  • Fix by returning remain so file is not pruned and engine can do a full predicate evaluation.

Tests

  • UT

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