Details
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Bug
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Status: Closed (View Workflow)
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Critical
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Resolution: Fixed
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10.2.1, 10.2.2
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None
Description
Simple window function used together with IFNULL in the SELECT ... list leads to repeatable crash:
openxs@ao756:~/dbs/maria10.2$ bin/mysql -uroot test
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Welcome to the MariaDB monitor. Commands end with ; or \g.
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Your MariaDB connection id is 2
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Server version: 10.2.2-MariaDB MariaDB Server
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Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.
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Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
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MariaDB [test]> create table t(a decimal(35,10), b int);
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Query OK, 0 rows affected (0.28 sec)
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MariaDB [test]> insert into t(a,b) values(1,1);
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Query OK, 1 row affected (0.05 sec)
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MariaDB [test]> insert into t(a,b) values(2,1);
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Query OK, 1 row affected (0.04 sec)
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MariaDB [test]> insert into t(a,b) values(0,1);
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Query OK, 1 row affected (0.04 sec)
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MariaDB [test]> select * from t;
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+--------------+------+
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| a | b |
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+--------------+------+
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| 1.0000000000 | 1 |
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| 2.0000000000 | 1 |
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| 0.0000000000 | 1 |
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+--------------+------+
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3 rows in set (0.00 sec)
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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;
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ERROR 2013 (HY000): Lost connection to MySQL server during query
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MariaDB [test]> 160826 17:30:16 mysqld_safe Number of processes running now: 0
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160826 17:30:16 mysqld_safe mysqld restarted
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MariaDB [test]> exit
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Bye
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openxs@ao756:~/dbs/maria10.2$ tail -100 data/ao756.err
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2016-08-26 17:26:59 139788388034496 [Note] InnoDB: Completed initialization of buffer pool
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2016-08-26 17:26:59 139788388034496 [Note] InnoDB: Highest supported file format is Barracuda.
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2016-08-26 17:26:59 139788388034496 [Note] InnoDB: 128 rollback segment(s) are active.
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2016-08-26 17:26:59 139788388034496 [Note] InnoDB: Waiting for purge to start
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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
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2016-08-26 17:26:59 139787830806272 [Note] InnoDB: Dumping buffer pool(s) not yet started
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2016-08-26 17:26:59 139788388034496 [Note] Plugin 'FEEDBACK' is disabled.
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2016-08-26 17:26:59 139788388034496 [Note] Server socket created on IP: '::'.
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2016-08-26 17:26:59 139788388034496 [Note] /home/openxs/dbs/maria10.2/bin/mysqld: ready for connections.
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Version: '10.2.2-MariaDB' socket: '/tmp/mysql.sock' port: 3306 MariaDB Server
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160826 17:30:16 [ERROR] mysqld got signal 11 ;
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This could be because you hit a bug. It is also possible that this binary
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or one of the libraries it was linked against is corrupt, improperly built,
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or misconfigured. This error can also be caused by malfunctioning hardware.
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To report this bug, see https://mariadb.com/kb/en/reporting-bugs
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We will try our best to scrape up some info that will hopefully help
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diagnose the problem, but since we have already crashed,
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something is definitely wrong and this may fail.
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Server version: 10.2.2-MariaDB
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key_buffer_size=134217728
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read_buffer_size=131072
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max_used_connections=1
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max_threads=153
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thread_count=1
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It is possible that mysqld could use up to
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key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 467161 K bytes of memory
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Hope that's ok; if not, decrease some variables in the equation.
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Thread pointer: 0x0x7f22d708a008
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Attempting backtrace. You can use the following information to find out
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where mysqld died. If you see no messages after this, something went
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terribly wrong...
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stack_bottom = 0x7f23052f69f0 thread_stack 0x48c00
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/home/openxs/dbs/maria10.2/bin/mysqld(my_print_stacktrace+0x2e)[0x7f2304c0191e]
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/home/openxs/dbs/maria10.2/bin/mysqld(handle_fatal_signal+0x38d)[0x7f230471013d]
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/lib/x86_64-linux-gnu/libpthread.so.0(+0x10330)[0x7f2303088330]
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/home/openxs/dbs/maria10.2/bin/mysqld(_ZN4Item13save_in_fieldEP5Fieldb+0x1e6)[0x7f230471fc66]
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/home/openxs/dbs/maria10.2/bin/mysqld(_Z31compute_window_func_with_framesP16Item_window_funcP5TABLEP11READ_RECORD+0x1a6)[0x7f23046a25f6]
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/home/openxs/dbs/maria10.2/bin/mysqld(_ZN18Window_func_runner4execEP5TABLEP9SORT_INFO+0x7b)[0x7f23046a27fb]
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/home/openxs/dbs/maria10.2/bin/mysqld(_ZN17Window_funcs_sort4execEP4JOIN+0x5b)[0x7f23046a288b]
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/home/openxs/dbs/maria10.2/bin/mysqld(_ZN24Window_funcs_computation4execEP4JOIN+0x18)[0x7f23046a2e78]
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/home/openxs/dbs/maria10.2/bin/mysqld(_ZN7AGGR_OP8end_sendEv+0xd7)[0x7f23045da667]
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/home/openxs/dbs/maria10.2/bin/mysqld(_Z24sub_select_postjoin_aggrP4JOINP13st_join_tableb+0x35)[0x7f23045da865]
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/home/openxs/dbs/maria10.2/bin/mysqld(_ZN4JOIN10exec_innerEv+0x845)[0x7f23045db165]
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/home/openxs/dbs/maria10.2/bin/mysqld(_ZN4JOIN4execEv+0x33)[0x7f23045db523]
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/home/openxs/dbs/maria10.2/bin/mysqld(_Z12mysql_selectP3THDP10TABLE_LISTjR4ListI4ItemEPS4_jP8st_orderS9_S7_S9_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x112)[0x7f23045db672]
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/home/openxs/dbs/maria10.2/bin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x23c)[0x7f23045dc12c]
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/home/openxs/dbs/maria10.2/bin/mysqld(+0x46211e)[0x7f230457b11e]
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mysys/stacktrace.c:247(my_print_stacktrace)[0x7f2304587dcc]
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/home/openxs/dbs/maria10.2/bin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_statebb+0x2b5)[0x7f230458b515]
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sql/item.cc:5956(Item::save_in_field(Field*, bool))[0x7f230458ed33]
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sql/sql_window.cc:1753(compute_window_func_with_frames(Item_window_func*, TABLE*, READ_RECORD*))[0x7f230458f5ac]
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/home/openxs/dbs/maria10.2/bin/mysqld(_Z24do_handle_one_connectionP7CONNECT+0x20a)[0x7f2304653a6a]
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sql/sql_select.cc:26156(AGGR_OP::end_send())[0x7f2304653c2d]
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/lib/x86_64-linux-gnu/libpthread.so.0(+0x8184)[0x7f2303080184]
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sql/sql_parse.cc:6311(execute_sqlcom_select)[0x7f23027a337d]
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Trying to get some variables.
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Some pointers may be invalid and cause the dump to abort.
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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
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Connection ID (thread ID): 2
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Status: NOT_KILLED
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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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...
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Attachments
Issue Links
- relates to
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MDEV-10815 Window Function Expressions Wrong Results
- Closed