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Subject [GitHub] [drill] vvysotskyi opened a new pull request #2289: DRILL-7985: Support Mongo aggregate, union, project, limit, sort pushdowns
Date Sun, 08 Aug 2021 14:46:41 GMT

vvysotskyi opened a new pull request #2289:
URL: https://github.com/apache/drill/pull/2289


   # [DRILL-7985](https://issues.apache.org/jira/browse/DRILL-7985): Support Mongo aggregate,
union, project, limit, sort pushdowns
   
   ## Description
   This pull request adds support for the following mongo pushdowns:
   - aggregate
   - project (including expressions)
   - limit (including offset)
   - union / union all
   - sort
   Added storage plugin configs to disable specific optimizations if required.
   
   Besides that, it includes changes for the Generic storage plugin pushdown framework that
simplifies the implementation of specific pushdowns for the planning stage. For more details
about it, please refer to this doc: https://github.com/apache/drill/compare/master...vvysotskyi:DRILL-7985?expand=1#diff-b0e0fdc4f6e47614a62fbfdbad0a21598726c72d15de22120e4ac9dbd945e933
   It works in a similar way to how we do pushdowns for JDBC, Cassandra, or Elasticsearch,
but without using the Calcite adapter.
   
   ## Documentation
   Yes
   
   ## Testing
   Added UT.
   


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