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  1. MariaDB Server
  2. MDEV-5535

cannot reopen temporary table

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    • 10.2.0-1, 10.2.0-3, 10.2.0-5, 10.2.0-6, 10.2.0-7, 10.2.0-8, 10.2.0-9, 10.2.0-10, 10.2.0-11, 10.2.1-1, 10.2.1-3, 10.2.1-4, 5.5.50

    Description

      It is a well-known and very old MySQL/MariaDB limitation that temporary tables can only be used once in any query; for example, one cannot join a temporary table to itself. This task is about removing this limitation.

      original bug report:

      if I create temporary table a (id int); I cant select a1.* from a a1, a a2;

      I understand, that http://bugs.mysql.com/bug.php?id=10327 is in "feature" state for 8(!!!) years.
      But may be at least at mariadb someone to fix it.
      It is not so extraordinary type of select.
      I had bumped at almost all kind of problems about this, which are described about this bug. And any kind of rewrite selects/logic to avoid this error is a huge performance and logic issuse at hiload projects.
      Can anyone tell me if it would be fixed? when? where?
      Because I cant find any mention about it in mariadb.
      Sorry if I missed something.

      Attachments

        Issue Links

          blocks

          Task - A task that needs to be done. CONJ-296 Support COM_MULTI

          • Major - Major loss of function.
          • Closed
          causes

          Bug - A problem which impairs or prevents the functions of the product. MDEV-15867 Slave SQL: Error 'Table 't' is specified twice (ER_UPDATE_TABLE_USED) upon CREATE TABLE .. SELECT

          • Major - Major loss of function.
          • Closed
          relates to

          Task - A task that needs to be done. MDEV-6115 window functions as in the SQL standard

          • Major - Major loss of function.
          • Closed

          Technical task - A technical task. MDEV-8789 Implement non-recursive common table expressions

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-10216 Assertion `strcmp(share->unique_file_name,filename) || share->last_version' failed in myisam/mi_open.c:67: test_if_reopen

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-11173 If a materialized VIEW is used multiple times in a query, several temporary tables are created

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

          Activity

            People

              nirbhay_c Nirbhay Choubey (Inactive)
              chombik tem (Inactive)
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              Dates

                Created:
                Updated:
                Resolved:

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