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  1. MariaDB Server
  2. MDEV-27259

Query with self join and sets of foreign keys crashes server: SIGSEGV and Assertion `key_col_info.comparator' failed, both in Item_func_in::get_func_row_mm_tree

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Details

    • Bug
    • Status: Confirmed (View Workflow)
    • Major
    • Resolution: Unresolved
    • 10.3.32, 10.2, 10.3
    • 10.3
    • Optimizer
    • None
    • Ubuntu 20.4

    Description

      I got a TABLE with an ID two foreign keys then some more columns.
      For context it is a sport project with tupels representing each a result of a match between Host and Guest.

      SELECT * FROM match t1 WHERE (203, 204) IN ((t1.Host, t1.Guest), (t1.Guest, t1.Host))

      works as expected

      SELECT * FROM match t1, match t2 WHERE (203, t2.hostgoals) IN ((t1.hostgoals, t1.guestgoals), (t1.guestgoals, t1.hostgoals))

      does, too

      SELECT * FROM match t1, match t2 WHERE (203, t2.Host) IN ((t1.Host, t1.Guest), (t1.Guest, t1.Host))

      crashes the server

      SQLSTATE[HY000]: General error: 2006 MySQL server has gone away

      Also after first occurence seems to have left server in corrupt state so it kept crashing without this query.

      Clarifications:
      "Host" and "Guest" are foreign keys to another table (same for both).
      "hostgoals" and "guestgoals" are just any numbers.

      Attachments

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-24337 Server crash in DTCollation::set_repertoire_from_charset

          • Major - Major loss of function.
          • Confirmed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-28346 UBSAN: runtime error: downcast of address X which does not point to an object of type 'Item_row' in Item_func_in::get_func_row_mm_tree and load of value X, which is not a valid value for type 'geometry_type' on SELECT

          • Major - Major loss of function.
          • Confirmed

          Activity

            People

              psergei Sergei Petrunia
              AdamPDotty Benjamin Dauth
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              Dates

                Created:
                Updated:

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