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  1. IMPALA
  2. IMPALA-6113

Skip row groups with predicates on NULL columns

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      Column chunks that only contain NULL values don't have their min_value and max_value fields populated and as a result we cannot skip row groups based on predicates on such columns. IMPALA-5061 added support to populate the null_count in statistics, allowing us to detect column chunks that only contain NULLs. We should use that information to skip row groups if the predicate allows us to.

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              • Assignee:
                gaborkaszab Gabor Kaszab
                Reporter:
                lv Lars Volker
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