Description
Extend join/aggregate materialized rewriting rule to produce rewritings using Union operators, e.g., a given query could be partially answered from the MV (year = 2014) and from the query (not(year=2014)). If the MV is stored e.g. in Druid, this rewriting might be beneficial. As with the other rewritings, decision on whether to finally use the rewriting is cost-based.
Attachments
Issue Links
- is related to
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CALCITE-1802 Add post-aggregation step for Union in materialized view rewriting
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- Closed
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- relates to
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CALCITE-1731 Rewriting of queries using materialized views with joins and aggregates
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- Closed
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