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  1. MariaDB Server
  2. MDEV-4372

MWL#253: Server crashes in calculate_cond_selectivity_for_table with EXISTS subquery, use_condition_selectivity=3, stat tables

        Details

        • Type: Bug
        • Status: Closed
        • Priority: Major
        • Resolution: Fixed
        • Affects Version/s: None
        • Fix Version/s: None
        • Component/s: None
        • Labels:
          None

          Description

          SET optimizer_use_condition_selectivity=3;
SET use_stat_tables = PREFERABLY;

CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES 
  (1),(7),(4),(7),(0),(2),(9),(4),(0),(9),(1),(3),(8),(8);

CREATE TABLE t2 (b INT);
INSERT INTO t2 VALUES (4),(5),(2),(5),(1),(1),(2);

ANALYZE TABLE t1, t2;
FLUSH TABLES;

SELECT * FROM t1, t2 WHERE EXISTS ( SELECT 1 FROM t1, t2 ) AND a != b OR a <= 4;

          #3  <signal handler called>
#4  0x00000000008e5762 in calculate_cond_selectivity_for_table (thd=0x3a70800, table=0x7fcedc02dc70, cond=0x7fcedc12e518) at /data/bzr/maria-10.0-mwl253/sql/opt_range.cc:3377
#5  0x000000000064d8ae in make_join_statistics (join=0x7fcedc12e710, tables_list=..., conds=0x7fcedc12e518, keyuse_array=0x7fcedc12ea18) at /data/bzr/maria-10.0-mwl253/sql/sql_select.cc:3839
#6  0x0000000000644c03 in JOIN::optimize_inner (this=0x7fcedc12e710) at /data/bzr/maria-10.0-mwl253/sql/sql_select.cc:1306
#7  0x0000000000643bd2 in JOIN::optimize (this=0x7fcedc12e710) at /data/bzr/maria-10.0-mwl253/sql/sql_select.cc:1008
#8  0x000000000064b6df in mysql_select (thd=0x3a70800, rref_pointer_array=0x3a73738, tables=0x7fcedc0e93c0, wild_num=1, fields=..., conds=0x7fcedc12e518, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147748608, result=0x7fcedc12e6f0, unit=0x3a72e00, select_lex=0x3a734d8) at /data/bzr/maria-10.0-mwl253/sql/sql_select.cc:3220
#9  0x0000000000642041 in handle_select (thd=0x3a70800, lex=0x3a72d48, result=0x7fcedc12e6f0, setup_tables_done_option=0) at /data/bzr/maria-10.0-mwl253/sql/sql_select.cc:376
#10 0x000000000061a185 in execute_sqlcom_select (thd=0x3a70800, all_tables=0x7fcedc0e93c0) at /data/bzr/maria-10.0-mwl253/sql/sql_parse.cc:4797
#11 0x000000000061278e in mysql_execute_command (thd=0x3a70800) at /data/bzr/maria-10.0-mwl253/sql/sql_parse.cc:2266
#12 0x000000000061ca26 in mysql_parse (thd=0x3a70800, rawbuf=0x7fcedc0e9168 "SELECT * FROM t1, t2 WHERE EXISTS ( SELECT 1 FROM t1, t2 ) AND a != b OR a <= 4", length=79, parser_state=0x7fcee739d500) at /data/bzr/maria-10.0-mwl253/sql/sql_parse.cc:5920
#13 0x000000000060fab2 in dispatch_command (command=COM_QUERY, thd=0x3a70800, packet=0x3a75d01 "SELECT * FROM t1, t2 WHERE EXISTS ( SELECT 1 FROM t1, t2 ) AND a != b OR a <= 4", packet_length=79) at /data/bzr/maria-10.0-mwl253/sql/sql_parse.cc:1091
#14 0x000000000060ece0 in do_command (thd=0x3a70800) at /data/bzr/maria-10.0-mwl253/sql/sql_parse.cc:810
#15 0x00000000007222fe in do_handle_one_connection (thd_arg=0x3a70800) at /data/bzr/maria-10.0-mwl253/sql/sql_connect.cc:1266
#16 0x0000000000721ce9 in handle_one_connection (arg=0x3a70800) at /data/bzr/maria-10.0-mwl253/sql/sql_connect.cc:1181
#17 0x0000000000c9d5d4 in pfs_spawn_thread (arg=0x3a1d230) at /data/bzr/maria-10.0-mwl253/storage/perfschema/pfs.cc:1015
#18 0x00007fcef2a8ae9a in start_thread (arg=0x7fcee739e700) at pthread_create.c:308
#19 0x00007fcef1d7ecbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112

          revision-id: igor@askmonty.org-20130404211131-w3aybgqc80g7aiaq
revno: 3516
branch-nick: maria-10.0-mwl253

          Reproducible with MyISAM, InnoDB, Aria.
          EXPLAIN also crashes.

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                relates to

                Task - A task that needs to be done. MDEV-4145 Take into account the selectivity of single-table range predicates on non-indexed columns when searching for the best execution plan

                • Major - Major loss of function.
                • Closed

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                  igor Igor Babaev added a comment -

                  A fix for the bug has been pushed into maria-10.0-mwl253.

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                  igor Igor Babaev added a comment - A fix for the bug has been pushed into maria-10.0-mwl253.

                    People

                    • Assignee:
                      igor Igor Babaev
                      Reporter:
                      elenst Elena Stepanova
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                      Dates

                      • Created:
                        Updated:
                        Resolved: