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  1. MariaDB Server
  2. MDEV-4349

MWL#253: Server crashes in calculate_cond_selectivity_for_table with constant table, optimizer_use_condition_selectivity>1

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    Details

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

      Description

      #3  <signal handler called>
      #4  0x00000000008e5560 in calculate_cond_selectivity_for_table (thd=0x2064800, table=0x7fc27c0ed680, cond=0x7fc27c01f740) at /data/bzr/maria-10.0-mwl253/sql/opt_range.cc:3367
      #5  0x000000000064d945 in make_join_statistics (join=0x7fc27c01e1c0, tables_list=..., conds=0x7fc27c01f740, keyuse_array=0x7fc27c01e4c8) at /data/bzr/maria-10.0-mwl253/sql/sql_select.cc:3857
      #6  0x0000000000644bf3 in JOIN::optimize_inner (this=0x7fc27c01e1c0) at /data/bzr/maria-10.0-mwl253/sql/sql_select.cc:1306
      #7  0x0000000000643bc2 in JOIN::optimize (this=0x7fc27c01e1c0) at /data/bzr/maria-10.0-mwl253/sql/sql_select.cc:1008
      #8  0x000000000064b6cf in mysql_select (thd=0x2064800, rref_pointer_array=0x2067738, tables=0x7fc27c131fd0, wild_num=1, fields=..., conds=0x7fc27c01e018, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147748608, result=0x7fc27c133d48, unit=0x2066e00, select_lex=0x20674d8) at /data/bzr/maria-10.0-mwl253/sql/sql_select.cc:3220
      #9  0x0000000000642031 in handle_select (thd=0x2064800, lex=0x2066d48, result=0x7fc27c133d48, setup_tables_done_option=0) at /data/bzr/maria-10.0-mwl253/sql/sql_select.cc:376
      #10 0x000000000061a175 in execute_sqlcom_select (thd=0x2064800, all_tables=0x7fc27c131fd0) at /data/bzr/maria-10.0-mwl253/sql/sql_parse.cc:4797
      #11 0x000000000061277e in mysql_execute_command (thd=0x2064800) at /data/bzr/maria-10.0-mwl253/sql/sql_parse.cc:2266
      #12 0x000000000061ca16 in mysql_parse (thd=0x2064800, rawbuf=0x7fc27c131d98 "SELECT * FROM t1 WHERE a IN ( SELECT b FROM t2 ) AND ( a > 3 )", length=62, parser_state=0x7fc2862b0500) at /data/bzr/maria-10.0-mwl253/sql/sql_parse.cc:5920
      #13 0x000000000060faa2 in dispatch_command (command=COM_QUERY, thd=0x2064800, packet=0x2069d01 "SELECT * FROM t1 WHERE a IN ( SELECT b FROM t2 ) AND ( a > 3 )", packet_length=62) at /data/bzr/maria-10.0-mwl253/sql/sql_parse.cc:1091
      #14 0x000000000060ecd0 in do_command (thd=0x2064800) at /data/bzr/maria-10.0-mwl253/sql/sql_parse.cc:810
      #15 0x0000000000722226 in do_handle_one_connection (thd_arg=0x2064800) at /data/bzr/maria-10.0-mwl253/sql/sql_connect.cc:1266
      #16 0x0000000000721c11 in handle_one_connection (arg=0x2064800) at /data/bzr/maria-10.0-mwl253/sql/sql_connect.cc:1181
      #17 0x0000000000c9d340 in pfs_spawn_thread (arg=0x2011230) at /data/bzr/maria-10.0-mwl253/storage/perfschema/pfs.cc:1015
      #18 0x00007fc29199de9a in start_thread (arg=0x7fc2862b1700) at pthread_create.c:308
      #19 0x00007fc290c91cbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112

      revision-id: igor@askmonty.org-20130401181718-qs2gbk9nd8t3rnvq
      revno: 3509
      branch-nick: maria-10.0-mwl253

      Test case:

      SET optimizer_use_condition_selectivity=3;
       
      CREATE TABLE t1 (a INT) ENGINE=MyISAM;
      INSERT INTO t1 VALUES (1);
       
      CREATE TABLE t2 (b INT) ENGINE=MyISAM;
      INSERT INTO t2 VALUES (2),(3);
       
      SELECT * FROM t1 WHERE a IN ( SELECT b FROM t2 ) AND ( a > 3 );

      Reproducible with optimizer_use_condition_selectivity = 2 | 3 | 4
      EXPLAIN also crashes.

      optimizer_switch (default):

      index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=off,exists_to_in=off

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              Assignee:
              igor Igor Babaev
              Reporter:
              elenst Elena Stepanova
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                Dates

                Created:
                Updated:
                Resolved:

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