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  1. MariaDB Server
  2. MDEV-10669

Crash in SELECT with window function used

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      Simple window function used together with IFNULL in the SELECT ... list leads to repeatable crash:

      openxs@ao756:~/dbs/maria10.2$ bin/mysql -uroot test
      Welcome to the MariaDB monitor.  Commands end with ; or \g.
      Your MariaDB connection id is 2
      Server version: 10.2.2-MariaDB MariaDB Server
       
      Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.
       
      Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
       
      MariaDB [test]> create table t(a decimal(35,10), b int);
      Query OK, 0 rows affected (0.28 sec)
       
      MariaDB [test]> insert into t(a,b) values(1,1);
      Query OK, 1 row affected (0.05 sec)
       
      MariaDB [test]> insert into t(a,b) values(2,1);
      Query OK, 1 row affected (0.04 sec)
       
      MariaDB [test]> insert into t(a,b) values(0,1);
      Query OK, 1 row affected (0.04 sec)
       
      MariaDB [test]> select * from t;
      +--------------+------+
      | a            | b    |
      +--------------+------+
      | 1.0000000000 |    1 |
      | 2.0000000000 |    1 |
      | 0.0000000000 |    1 |
      +--------------+------+
      3 rows in set (0.00 sec)
       
      MariaDB [test]> SELECT ifnull(((t.a) / CASE WHEN sum(t.a) over(partition by t.b) =0 then null else null end) ,0) from t;
      ERROR 2013 (HY000): Lost connection to MySQL server during query
      MariaDB [test]> 160826 17:30:16 mysqld_safe Number of processes running now: 0
      160826 17:30:16 mysqld_safe mysqld restarted
       
      MariaDB [test]> exit
      Bye
      openxs@ao756:~/dbs/maria10.2$ tail -100 data/ao756.err
      2016-08-26 17:26:59 139788388034496 [Note] InnoDB: Completed initialization of buffer pool
      2016-08-26 17:26:59 139788388034496 [Note] InnoDB: Highest supported file format is Barracuda.
      2016-08-26 17:26:59 139788388034496 [Note] InnoDB: 128 rollback segment(s) are active.
      2016-08-26 17:26:59 139788388034496 [Note] InnoDB: Waiting for purge to start
      2016-08-26 17:26:59 139788388034496 [Note] InnoDB:  Percona XtraDB (http://www.percona.com) 5.6.30-76.3 started; log sequence number 1616819
      2016-08-26 17:26:59 139787830806272 [Note] InnoDB: Dumping buffer pool(s) not yet started
      2016-08-26 17:26:59 139788388034496 [Note] Plugin 'FEEDBACK' is disabled.
      2016-08-26 17:26:59 139788388034496 [Note] Server socket created on IP: '::'.
      2016-08-26 17:26:59 139788388034496 [Note] /home/openxs/dbs/maria10.2/bin/mysqld: ready for connections.
      Version: '10.2.2-MariaDB'  socket: '/tmp/mysql.sock'  port: 3306  MariaDB Server
      160826 17:30:16 [ERROR] mysqld got signal 11 ;
      This could be because you hit a bug. It is also possible that this binary
      or one of the libraries it was linked against is corrupt, improperly built,
      or misconfigured. This error can also be caused by malfunctioning hardware.
       
      To report this bug, see https://mariadb.com/kb/en/reporting-bugs
       
      We will try our best to scrape up some info that will hopefully help
      diagnose the problem, but since we have already crashed,
      something is definitely wrong and this may fail.
       
      Server version: 10.2.2-MariaDB
      key_buffer_size=134217728
      read_buffer_size=131072
      max_used_connections=1
      max_threads=153
      thread_count=1
      It is possible that mysqld could use up to
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 467161 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0x0x7f22d708a008
      Attempting backtrace. You can use the following information to find out
      where mysqld died. If you see no messages after this, something went
      terribly wrong...
      stack_bottom = 0x7f23052f69f0 thread_stack 0x48c00
      /home/openxs/dbs/maria10.2/bin/mysqld(my_print_stacktrace+0x2e)[0x7f2304c0191e]
      /home/openxs/dbs/maria10.2/bin/mysqld(handle_fatal_signal+0x38d)[0x7f230471013d]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0x10330)[0x7f2303088330]
      /home/openxs/dbs/maria10.2/bin/mysqld(_ZN4Item13save_in_fieldEP5Fieldb+0x1e6)[0x7f230471fc66]
      /home/openxs/dbs/maria10.2/bin/mysqld(_Z31compute_window_func_with_framesP16Item_window_funcP5TABLEP11READ_RECORD+0x1a6)[0x7f23046a25f6]
      /home/openxs/dbs/maria10.2/bin/mysqld(_ZN18Window_func_runner4execEP5TABLEP9SORT_INFO+0x7b)[0x7f23046a27fb]
      /home/openxs/dbs/maria10.2/bin/mysqld(_ZN17Window_funcs_sort4execEP4JOIN+0x5b)[0x7f23046a288b]
      /home/openxs/dbs/maria10.2/bin/mysqld(_ZN24Window_funcs_computation4execEP4JOIN+0x18)[0x7f23046a2e78]
      /home/openxs/dbs/maria10.2/bin/mysqld(_ZN7AGGR_OP8end_sendEv+0xd7)[0x7f23045da667]
      /home/openxs/dbs/maria10.2/bin/mysqld(_Z24sub_select_postjoin_aggrP4JOINP13st_join_tableb+0x35)[0x7f23045da865]
      /home/openxs/dbs/maria10.2/bin/mysqld(_ZN4JOIN10exec_innerEv+0x845)[0x7f23045db165]
      /home/openxs/dbs/maria10.2/bin/mysqld(_ZN4JOIN4execEv+0x33)[0x7f23045db523]
      /home/openxs/dbs/maria10.2/bin/mysqld(_Z12mysql_selectP3THDP10TABLE_LISTjR4ListI4ItemEPS4_jP8st_orderS9_S7_S9_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x112)[0x7f23045db672]
      /home/openxs/dbs/maria10.2/bin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x23c)[0x7f23045dc12c]
      /home/openxs/dbs/maria10.2/bin/mysqld(+0x46211e)[0x7f230457b11e]
      mysys/stacktrace.c:247(my_print_stacktrace)[0x7f2304587dcc]
      /home/openxs/dbs/maria10.2/bin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_statebb+0x2b5)[0x7f230458b515]
      sql/item.cc:5956(Item::save_in_field(Field*, bool))[0x7f230458ed33]
      sql/sql_window.cc:1753(compute_window_func_with_frames(Item_window_func*, TABLE*, READ_RECORD*))[0x7f230458f5ac]
      /home/openxs/dbs/maria10.2/bin/mysqld(_Z24do_handle_one_connectionP7CONNECT+0x20a)[0x7f2304653a6a]
      sql/sql_select.cc:26156(AGGR_OP::end_send())[0x7f2304653c2d]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0x8184)[0x7f2303080184]
      sql/sql_parse.cc:6311(execute_sqlcom_select)[0x7f23027a337d]
       
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x7f22d70db020): SELECT ifnull(((t.a) / CASE WHEN sum(t.a) over(partition by t.b) =0 then null else null end) ,0) from t
      Connection ID (thread ID): 2
      Status: NOT_KILLED
       
      Optimizer switch: 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=on,exists_to_in=on,orderby_uses_equalities=off
      ...
      

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              Assignee:
              psergei Sergei Petrunia
              Reporter:
              valerii Valerii Kravchuk
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                Created:
                Updated:
                Resolved:

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