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  1. MariaDB Server
  2. MDEV-34993

Incorrect cardinality estimation causes poor query plan

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      Filing this based on investigation in TODO-4922.

      There is a class of known issues one can observe with optimizer_use_condition_selectivity=3 setting. MariaDB 11.0 has a rewrite of relevant code.

      This MDEV is about making a minimal fix to stop pre-11.0 versions from picking very poor query plans.

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          Bug - A problem which impairs or prevents the functions of the product. MDEV-35074 main.selectivity_notembedded and main.selectivity_innodb_notembedded fail with view protocol

          • Blocker - Blocks development and/or testing work, production could not run.
          • Closed

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              psergei Sergei Petrunia
              psergei Sergei Petrunia
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