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  1. MariaDB Server
  2. MDEV-26300

LATERAL DERIVED: Optimizer trace insufficient, odd computations

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    Description

      LATERAL DERIVED optimization is not covered well enough in Optimizer Trace.

      There's some coverage in MDEV-24325 but some important data is not printed.

      (See comments below. It's not just about trace, carefully reading what is traced reveals further issues).

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          Task - A task that needs to be done. MDEV-36321 Indexes on derived tables with GROUP BY produce wrong out_rows estimates

          • Critical - Crashes, loss of data, severe memory leak.
          • In Testing

          Bug - A problem which impairs or prevents the functions of the product. MDEV-36323 Split Materialized code: last_refills is never set in 11.0+

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          relates to

          Task - A task that needs to be done. MDEV-36321 Indexes on derived tables with GROUP BY produce wrong out_rows estimates

          • Critical - Crashes, loss of data, severe memory leak.
          • In Testing

          Bug - A problem which impairs or prevents the functions of the product. MDEV-36323 Split Materialized code: last_refills is never set in 11.0+

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-24325 Optimizer trace doesn't cover LATERAL DERIVED

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-30878 Weird optimizer trace content for the LATERAL DERIVED table/access path

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

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              psergei Sergei Petrunia
              psergei Sergei Petrunia
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                Updated:

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