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  1. MariaDB Server
  2. MDEV-25896

SEL_ARG weight mismatch, Assertion `computed_weight == weight' in SEL_ARG::verify_weight



    • Type: Bug
    • Status: Open (View Workflow)
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 10.5, 10.6
    • Fix Version/s: 10.5
    • Component/s: Optimizer
    • Labels:


      --source include/have_innodb.inc
      CREATE TABLE t1 (pk INT, a INT, b INT, PRIMARY KEY (pk), KEY(a,b)) ENGINE=InnoDB;
      INSERT INTO t1 VALUES (1,1,1),(2,2,2);
      SELECT a FROM t1 WHERE a < 50 AND pk IN (7,3) AND b IN (35,3) OR a = 17;
      # Cleanup
      DROP TABLE t1;

      10.5 2c6d5c92

      2021-06-11 15:34:40 4 [ERROR] SEL_ARG weight mismatch: computed 3 have 7
      mariadbd: /data/src/10.5/sql/opt_range.cc:10086: uint SEL_ARG::verify_weight(): Assertion `computed_weight == weight' failed.
      210611 15:34:40 [ERROR] mysqld got signal 6 ;
      #7  0x00007fe40717cf36 in __GI___assert_fail (assertion=0x565492b1e33e "computed_weight == weight", file=0x565492b1c400 "/data/src/10.5/sql/opt_range.cc", line=10086, function=0x565492b1e358 "uint SEL_ARG::verify_weight()") at assert.c:101
      #8  0x00005654920420c3 in SEL_ARG::verify_weight (this=0x7fe3d4054e60) at /data/src/10.5/sql/opt_range.cc:10086
      #9  0x0000565492042150 in key_or_with_limit (param=0x7fe4003d59b0, keyno=1, key1=0x7fe3d4054698, key2=0x7fe3d4054c88) at /data/src/10.5/sql/opt_range.cc:10107
      #10 0x0000565492041194 in tree_or (param=0x7fe4003d59b0, tree1=0x7fe3d4054608, tree2=0x7fe3d4054bf8) at /data/src/10.5/sql/opt_range.cc:9750
      #11 0x000056549203cfe4 in Item_cond::get_mm_tree (this=0x7fe3d4017348, param=0x7fe4003d59b0, cond_ptr=0x7fe3d4019e30) at /data/src/10.5/sql/opt_range.cc:8360
      #12 0x000056549202ea91 in SQL_SELECT::test_quick_select (this=0x7fe3d4019e28, thd=0x7fe3d4000db8, keys_to_use=..., prev_tables=0, limit=18446744073709551615, force_quick_range=false, ordered_output=false, remove_false_parts_of_where=true, only_single_index_range_scan=false) at /data/src/10.5/sql/opt_range.cc:2881
      #13 0x0000565491b75e55 in get_quick_record_count (thd=0x7fe3d4000db8, select=0x7fe3d4019e28, table=0x7fe3d4226aa8, keys=0x7fe3d4018be8, limit=18446744073709551615) at /data/src/10.5/sql/sql_select.cc:4805
      #14 0x0000565491b787ee in make_join_statistics (join=0x7fe3d4017d80, tables_list=..., keyuse_array=0x7fe3d4018070) at /data/src/10.5/sql/sql_select.cc:5537
      #15 0x0000565491b6cc18 in JOIN::optimize_inner (this=0x7fe3d4017d80) at /data/src/10.5/sql/sql_select.cc:2294
      #16 0x0000565491b6a705 in JOIN::optimize (this=0x7fe3d4017d80) at /data/src/10.5/sql/sql_select.cc:1666
      #17 0x0000565491b75b34 in mysql_select (thd=0x7fe3d4000db8, tables=0x7fe3d4015a10, fields=..., conds=0x7fe3d4017348, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147748608, result=0x7fe3d4017d58, unit=0x7fe3d4004f70, select_lex=0x7fe3d40153f8) at /data/src/10.5/sql/sql_select.cc:4747
      #18 0x0000565491b65531 in handle_select (thd=0x7fe3d4000db8, lex=0x7fe3d4004ea8, result=0x7fe3d4017d58, setup_tables_done_option=0) at /data/src/10.5/sql/sql_select.cc:443
      #19 0x0000565491b27a73 in execute_sqlcom_select (thd=0x7fe3d4000db8, all_tables=0x7fe3d4015a10) at /data/src/10.5/sql/sql_parse.cc:6310
      #20 0x0000565491b1ed9b in mysql_execute_command (thd=0x7fe3d4000db8) at /data/src/10.5/sql/sql_parse.cc:4006
      #21 0x0000565491b2c922 in mysql_parse (thd=0x7fe3d4000db8, rawbuf=0x7fe3d4015310 "SELECT a FROM t1 WHERE a < 50 AND pk IN (7,3) AND b IN (35,3) OR a = 17", length=71, parser_state=0x7fe4003d7490, is_com_multi=false, is_next_command=false) at /data/src/10.5/sql/sql_parse.cc:8096
      #22 0x0000565491b188cb in dispatch_command (command=COM_QUERY, thd=0x7fe3d4000db8, packet=0x7fe3d400b5c9 "SELECT a FROM t1 WHERE a < 50 AND pk IN (7,3) AND b IN (35,3) OR a = 17", packet_length=71, is_com_multi=false, is_next_command=false) at /data/src/10.5/sql/sql_parse.cc:1891
      #23 0x0000565491b170bd in do_command (thd=0x7fe3d4000db8) at /data/src/10.5/sql/sql_parse.cc:1370
      #24 0x0000565491cc6fb0 in do_handle_one_connection (connect=0x565495dcf958, put_in_cache=true) at /data/src/10.5/sql/sql_connect.cc:1410
      #25 0x0000565491cc6d13 in handle_one_connection (arg=0x565495e8c2e8) at /data/src/10.5/sql/sql_connect.cc:1312
      #26 0x000056549222bd79 in pfs_spawn_thread (arg=0x565495dcd168) at /data/src/10.5/storage/perfschema/pfs.cc:2201
      #27 0x00007fe407694609 in start_thread (arg=<optimized out>) at pthread_create.c:477
      #28 0x00007fe407268293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

      Reproducible on 10.5, 10.6. Not applicable to 10.4.
      No obvious problem on a non-debug build (no error message in the log, either).
      Not reproducible with the test case above and MyISAM/Aria instead of InnoDB.
      EXPLAIN on debug build also fails.
      EXPLAIN from a non-debug build:

      EXPLAIN EXTENDED SELECT a FROM t1 WHERE a < 50 AND pk IN (7,3) AND b IN (35,3) OR a = 17;
      id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
      1	SIMPLE	t1	range	PRIMARY,a	a	5	NULL	2	100.00	Using where; Using index
      Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` < 50 and `test`.`t1`.`pk` in (7,3) and `test`.`t1`.`b` in (35,3) or `test`.`t1`.`a` = 17




            psergei Sergei Petrunia
            elenst Elena Stepanova
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