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  1. Couchbase Server
  2. MB-61508

Intersect scan used for two similar partial indexes

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    Description

      When two similar partial indexes are defined, the planner may choose an intersect scan with both indexes when using one of the indexes is more efficient:

      CREATE INDEX ix1 ON default(id) WHERE type = "type1";
      		 
      CREATE INDEX ix2 ON default(id, type) WHERE type NOT IN ["type2", "type3"];
      		 
       
      		 
      explain SELECT * FROM default WHERE type = "type1" AND id = $my_id;

      In this case using ix1 is better.

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            pierre.regazzoni Pierre Regazzoni
            bingjie.miao Bingjie Miao
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