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  1. MariaDB Server
  2. MDEV-2174

LP:611704 - Crash in replace_where_subcondition with nested subquery and semijoin=on

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Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • None
    • None
    • None

    Description

      The following query crashes maria 5.3 when executed as a prepared statement or a stored procedure:

      SELECT `col_varchar_key`
      FROM (
      SELECT SUBQUERY1_t1 .*
      FROM BB SUBQUERY1_t1 STRAIGHT_JOIN ( CC SUBQUERY1_t2 JOIN C ON SUBQUERY1_t2 .`col_varchar_key` ) ON SUBQUERY1_t2 .`col_varchar_key` AND ( 's' , 'r' ) IN (
      SELECT CHILD_SUBQUERY1_t1 .`col_varchar_nokey` , CHILD_SUBQUERY1_t2 .`col_varchar_nokey`
      FROM C CHILD_SUBQUERY1_t1 JOIN C CHILD_SUBQUERY1_t2 ON CHILD_SUBQUERY1_t1 .`col_int_nokey` ) ) table3 ;

      backtrace:

      #3 0x0827e9e0 in handle_segfault (sig=11) at mysqld.cc:2703
      #4 <signal handler called>
      #5 0x083b541b in replace_where_subcondition (join=0xb5d93ee0, expr=0xb5d72ddc, old_cond=0xb5d74320, new_cond=0xb5d8d070, do_fix_fields=false)
      at opt_subselect.cc:550
      #6 0x083b5303 in convert_join_subqueries_to_semijoins (join=0xb5d93ee0) at opt_subselect.cc:508
      #7 0x082fd3de in JOIN::optimize (this=0xb5d93ee0) at sql_select.cc:740
      #8 0x08303865 in mysql_select (thd=0xa8b0fd0, rref_pointer_array=0xb5d71e74, tables=0xb5d722e8, wild_num=0, fields=..., conds=0x0, og_num=0, order=0x0,
      group=0x0, having=0x0, proc_param=0x0, select_options=2416201216, result=0xb5d92150, unit=0xb5d71f10, select_lex=0xb5d71d70) at sql_select.cc:2542
      #9 0x08447f45 in mysql_derived_filling (thd=0xa8b0fd0, lex=0xb5d710f8, orig_table_list=0xb5d8c170) at sql_derived.cc:295
      #10 0x08447837 in mysql_handle_derived (lex=0xb5d710f8, processor=0x8447d60 <mysql_derived_filling(THD*, LEX*, TABLE_LIST*)>) at sql_derived.cc:56
      #11 0x082e4918 in open_and_lock_tables_derived (thd=0xa8b0fd0, tables=0xb5d8c170, derived=true) at sql_base.cc:5067
      #12 0x082a0d0f in open_and_lock_tables (thd=0xa8b0fd0, tables=0xb5d8c170) at mysql_priv.h:1648
      #13 0x0829a4b1 in execute_sqlcom_select (thd=0xa8b0fd0, all_tables=0xb5d8c170) at sql_parse.cc:5046
      #14 0x082910b8 in mysql_execute_command (thd=0xa8b0fd0) at sql_parse.cc:2265
      #15 0x084623f1 in sp_instr_stmt::exec_core (this=0xb5d8c370, thd=0xa8b0fd0, nextp=0xb609f2f8) at sp_head.cc:2927
      #16 0x08461d5d in sp_lex_keeper::reset_lex_and_exec_core (this=0xb5d8c398, thd=0xa8b0fd0, nextp=0xb609f2f8, open_tables=false, instr=0xb5d8c370)
      at sp_head.cc:2748
      #17 0x084621ca in sp_instr_stmt::execute (this=0xb5d8c370, thd=0xa8b0fd0, nextp=0xb609f2f8) at sp_head.cc:2870
      #18 0x0845e4ce in sp_head::execute (this=0xb5d707f0, thd=0xa8b0fd0) at sp_head.cc:1249
      #19 0x08460117 in sp_head::execute_procedure (this=0xb5d707f0, thd=0xa8b0fd0, args=0xa8b2c04) at sp_head.cc:1983
      #20 0x0829818d in mysql_execute_command (thd=0xa8b0fd0) at sql_parse.cc:4419
      #21 0x0829c8b9 in mysql_parse (thd=0xa8b0fd0, inBuf=0xb5d31900 "CALL stored_proc_23161()", length=24, found_semicolon=0xb60a0230) at sql_parse.cc:6027
      #22 0x0828eaea in dispatch_command (command=COM_QUERY, thd=0xa8b0fd0, packet=0xa8c9329 "CALL stored_proc_23161()", packet_length=24) at sql_parse.cc:1184
      #23 0x0828df90 in do_command (thd=0xa8b0fd0) at sql_parse.cc:890
      #24 0x0828b0f0 in handle_one_connection (arg=0xa8b0fd0) at sql_connect.cc:1153
      #25 0x00a08919 in start_thread () from /lib/libpthread.so.0
      #26 0x00951e5e in clone () from /lib/libc.so.6

      EXPLAIN:

      1 PRIMARY <derived2> system NULL NULL NULL NULL 0 const row not found
      2 DERIVED NULL NULL NULL NULL NULL NULL NULL no matching row in const table
      3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables

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            psergei Sergei Petrunia
            philipstoev Philip Stoev (Inactive)
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            Dates

              Created:
              Updated:
              Resolved:

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