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  1. MariaDB Server
  2. MDEV-193

LP:944706 - Query with impossible or constant subquery in WHERE or HAVING is not precomputed and thus not part of optimization

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 5.5.25
    • Component/s: None
    • Labels:
      None

      Description

      https://bugs.launchpad.net/maria/+bug/944706

      This is not a new bug, but it has been recently switched from milestone 5.3 to 5.5, so it needs an entry in JIRA.
      Fix version 5.5.23 is temporary.

        Attachments

          Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-277 CHEAP SQ: Server crashes in st_join_table::get_examined_rows with semijoin+materialization, IN and = subqueries

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-287 CHEAP SQ: A query with subquery in SELECT list, EXISTS, inner joins takes hundreds times longer

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-288 CHEAP SQ: Valgrind warnings "Memory lost" with IN and EXISTS nested subquery, materialization+semijoin

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-311 CHEAP SQ: Inconsistent behavior of subquery in SELECT and HAVING

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-312 CHEAP SQ: A query with LEFT JOIN in outer SELECT and INNER JOIN and aggregate in subquery takes much longer than on the main tree

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-317 CHEAP SQ: A query with EXISTS subquery, aggregate function in subquery, ORDER BY and LIMIT takes much longer than on main tree if optimizer_prune_level=0

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-321 CHEAP SQ: A query with inner joins and EXISTS subquery takes several times longer on MDEV-193 tree than on 5.5 main tree

          • Major - Major loss of function.
          • Closed

            Activity

              People

              Assignee:
              timour Timour Katchaounov (Inactive)
              Reporter:
              elenst Elena Stepanova
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                Dates

                Created:
                Updated:
                Resolved: