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  1. MariaDB Server
  2. MDEV-9741

Window functions: support being in a subquery

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    • Sprint:
      10.2.0-9

      Description

      Current code assumes that window function computation is a once-in-a-query
      event. It creates Item and Cached_item objects, and allocates things on
      thd->mem_root.

      This task is separate the computations into

      • Stage #1: a part that is done once
      • Stage #2: a part that is re-run for every select re-execution.

      Also, all 'cursor' objects must be created at stage #1.

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              Assignee:
              psergei Sergei Petrunia
              Reporter:
              psergei Sergei Petrunia
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