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  1. MariaDB Server
  2. MDEV-6439

Server crashes in Explain_union::print_explain with explain in slow log, tis620 charset

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      #2  0x0000000000864189 in handle_fatal_signal (sig=11) at 10.0/sql/signal_handler.cc:262
      #3  <signal handler called>
      #4  0x00000000007c4f24 in Explain_union::print_explain (this=0x7fee28b77b68, query=0x7fee28b77aa8, output=0x7fee325b4d10, explain_flags=0 '\000') at 10.0/sql/sql_explain.cc:228
      #5  0x00000000007c53cc in Explain_node::print_explain_for_children (this=0x7fee28b78ff0, query=0x7fee28b77aa8, output=0x7fee325b4d10, explain_flags=0 '\000') at 10.0/sql/sql_explain.cc:327
      #6  0x00000000007c57a7 in Explain_select::print_explain (this=0x7fee28b78ff0, query=0x7fee28b77aa8, output=0x7fee325b4d10, explain_flags=0 '\000') at 10.0/sql/sql_explain.cc:390
      #7  0x00000000007c4c9c in Explain_query::print_explain (this=0x7fee28b77aa8, output=0x7fee325b4d10, explain_flags=0 '\000') at 10.0/sql/sql_explain.cc:175
      #8  0x00000000007c4d63 in Explain_query::print_explain_str (this=0x7fee28b77aa8, thd=0x7fee2b32f070, out_str=0x7fee325b4e70) at 10.0/sql/sql_explain.cc:197
      #9  0x00000000007c4cd0 in print_explain_query (lex=0x7fee2b332cc0, thd=0x7fee2b32f070, str=0x7fee325b4e70) at 10.0/sql/sql_explain.cc:182
      #10 0x000000000093552b in MYSQL_QUERY_LOG::write (this=0x7fee2c3d6150, thd=0x7fee2b32f070, current_time=1405123297, user_host=0x7fee325b52a0 "root[root] @ localhost []", user_host_len=25, query_utime=1563, lock_utime=733, is_command=false, sql_text=0x7fee28819088 "SELECT * FROM t1 WHERE a >= ANY ( SELECT 'foo' UNION SELECT 'bar' )", sql_text_len=67) at 10.0/sql/log.cc:2926
      #11 0x000000000093088b in Log_to_file_event_handler::log_slow (this=0x7fee2c3d5c00, thd=0x7fee2b32f070, current_time=..., user_host=0x7fee325b52a0 "root[root] @ localhost []", user_host_len=25, query_utime=1563, lock_utime=733, is_command=false, sql_text=0x7fee28819088 "SELECT * FROM t1 WHERE a >= ANY ( SELECT 'foo' UNION SELECT 'bar' )", sql_text_len=67) at 10.0/sql/log.cc:1018
      #12 0x000000000093129e in LOGGER::slow_log_print (this=0x18a1600, thd=0x7fee2b32f070, query=0x7fee28819088 "SELECT * FROM t1 WHERE a >= ANY ( SELECT 'foo' UNION SELECT 'bar' )", query_length=67, current_utime=52081142100) at 10.0/sql/log.cc:1309
      #13 0x000000000093d254 in slow_log_print (thd=0x7fee2b32f070, query=0x7fee28819088 "SELECT * FROM t1 WHERE a >= ANY ( SELECT 'foo' UNION SELECT 'bar' )", query_length=67, current_utime=52081142100) at 10.0/sql/log.cc:6020
      #14 0x000000000067708c in log_slow_statement (thd=0x7fee2b32f070) at 10.0/sql/sql_parse.cc:1823
      #15 0x0000000000676d62 in dispatch_command (command=COM_QUERY, thd=0x7fee2b32f070, packet=0x7fee2c3f6071 "", packet_length=67) at 10.0/sql/sql_parse.cc:1743
      #16 0x0000000000674be2 in do_command (thd=0x7fee2b32f070) at 10.0/sql/sql_parse.cc:1006
      #17 0x0000000000790ab5 in do_handle_one_connection (thd_arg=0x7fee2b32f070) at 10.0/sql/sql_connect.cc:1379
      #18 0x0000000000790808 in handle_one_connection (arg=0x7fee2b32f070) at 10.0/sql/sql_connect.cc:1293
      #19 0x0000000000cc22f6 in pfs_spawn_thread (arg=0x7fee2a6a0970) at 10.0/storage/perfschema/pfs.cc:1860
      #20 0x00007fee321a0b50 in start_thread (arg=<optimized out>) at pthread_create.c:304
      #21 0x00007fee30698a7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112

      Stack trace from:

      revision-id: knielsen@knielsen-hq.org-20140711100647-nf3rdaf5ep26pgty
      revno: 4290
      branch-nick: 10.0

      Test case:

      SET NAMES tis620;
      SET GLOBAL slow_query_log = 1;
      SET long_query_time = 0.000001;
      SET log_slow_verbosity = 'explain';
       
      CREATE TABLE t1 (a VARCHAR(3)) ENGINE=MyISAM;
      SELECT * FROM t1 WHERE a >= ANY ( SELECT 'foo' UNION SELECT 'bar' );

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              Assignee:
              psergey Sergei Petrunia
              Reporter:
              elenst Elena Stepanova
              Votes:
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                Created:
                Updated:
                Resolved: