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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/05/01 20:50:42 UTC

[GitHub] [arrow-datafusion] jon-chuang commented on issue #2248: [EPIC] Subquery support

jon-chuang commented on issue #2248:
URL: https://github.com/apache/arrow-datafusion/issues/2248#issuecomment-1114332289

   Some additional ideas for subquery optimizations:
   - If rest of subquery is not correlated, push up correlated filter (in particular, correlated equality filter) into a left join on the filter.
   - More here: https://www.alibabacloud.com/blog/query-optimization-technology-for-correlated-subqueries_597644


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