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Posted to github@arrow.apache.org by "mingmwang (via GitHub)" <gi...@apache.org> on 2023/04/04 02:25:20 UTC

[GitHub] [arrow-datafusion] mingmwang commented on issue #5646: TPCH, Query 18 and 17 very slow

mingmwang commented on issue #5646:
URL: https://github.com/apache/arrow-datafusion/issues/5646#issuecomment-1495249710

   One reason for so many `downcast_value` call is because the grouping column `l_partkey` is with high cardinality, causing the vectorization is almost useless.


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