Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Fixed
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10.4, 10.5
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None
Description
This is originally coming from CLX-251.
A testcase using FederatedX engine:
Apply the following diff:
diff --git a/mysql-test/suite/federated/federatedx_create_handlers.test b/mysql-test/suite/federated/federatedx_create_handlers.test
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index 42a03e60d67..8f602886f09 100644
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--- a/mysql-test/suite/federated/federatedx_create_handlers.test
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+++ b/mysql-test/suite/federated/federatedx_create_handlers.test
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@@ -167,6 +167,19 @@ select name into outfile 'tmp.txt' from federated.t1;
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let $path=`select concat(@@datadir, 'test/tmp.txt')`;
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remove_file $path;
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+--echo #
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+--echo # CLX-251: EXPLAIN with subselect crashes MariaDB server
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+--echo #
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+select sin(0);
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+
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+explain
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+select * from federated.t1
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+where name in (select name from federated.t2);
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+
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+explain format=json
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+select * from federated.t1
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+where name in (select name from federated.t2);
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+
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DROP TABLE federated.t1, federated.t2, federated.t3, federated.t4;
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connection slave; |
Run ./mtr federated.federatedx_create_handlers and it will crash like so:
Thread 1 (Thread 0x7f475e44b700 (LWP 32449)):
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#0 __pthread_kill (threadid=<optimized out>, signo=11) at ../sysdeps/unix/sysv/linux/pthread_kill.c:57
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#1 0x000055da6c0301ab in my_write_core (sig=11) at /home/psergey/dev-git/10.4-cl3/mysys/stacktrace.c:481
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#2 0x000055da6b792887 in handle_fatal_signal (sig=11) at /home/psergey/dev-git/10.4-cl3/sql/signal_handler.cc:343
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#3 <signal handler called>
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#4 0x000055da6b3adf88 in With_sum_func_cache::With_sum_func_cache (this=0x7f4740017362, a=0xa5a5a5a5a5a5a5a5, b=0x7f47400133f8) at /home/psergey/dev-git/10.4-cl3/sql/item.h:2440
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#5 0x000055da6b3af99d in Item_func::Item_func (this=0x7f47400172b0, thd=0x7f4740000d50, a=0xa5a5a5a5a5a5a5a5, b=0x7f47400133f8) at /home/psergey/dev-git/10.4-cl3/sql/item_func.h:111
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#6 0x000055da6b3b00b0 in Item_int_func::Item_int_func (this=0x7f47400172b0, thd=0x7f4740000d50, a=0xa5a5a5a5a5a5a5a5, b=0x7f47400133f8) at /home/psergey/dev-git/10.4-cl3/sql/item_func.h:997
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#7 0x000055da6b3b03ea in Item_bool_func::Item_bool_func (this=0x7f47400172b0, thd=0x7f4740000d50, a=0xa5a5a5a5a5a5a5a5, b=0x7f47400133f8) at /home/psergey/dev-git/10.4-cl3/sql/item_cmpfunc.h:222
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#8 0x000055da6b3b0572 in Item_bool_func2::Item_bool_func2 (this=0x7f47400172b0, thd=0x7f4740000d50, a=0xa5a5a5a5a5a5a5a5, b=0x7f47400133f8) at /home/psergey/dev-git/10.4-cl3/sql/item_cmpfunc.h:412
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#9 0x000055da6b3b07ce in Item_bool_func2_with_rev::Item_bool_func2_with_rev (this=0x7f47400172b0, thd=0x7f4740000d50, a=0xa5a5a5a5a5a5a5a5, b=0x7f47400133f8) at /home/psergey/dev-git/10.4-cl3/sql/item_cmpfunc.h:474
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#10 0x000055da6b3b0a3d in Item_bool_rowready_func2::Item_bool_rowready_func2 (this=0x7f47400172b0, thd=0x7f4740000d50, a=0xa5a5a5a5a5a5a5a5, b=0x7f47400133f8) at /home/psergey/dev-git/10.4-cl3/sql/item_cmpfunc.h:516
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#11 0x000055da6b3b0aea in Item_func_eq::Item_func_eq (this=0x7f47400172b0, thd=0x7f4740000d50, a=0xa5a5a5a5a5a5a5a5, b=0x7f47400133f8) at /home/psergey/dev-git/10.4-cl3/sql/item_cmpfunc.h:708
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#12 0x000055da6b7f3eb1 in Eq_creator::create (this=0x55da6cdada80 <eq_creator>, thd=0x7f4740000d50, a=0xa5a5a5a5a5a5a5a5, b=0x7f47400133f8) at /home/psergey/dev-git/10.4-cl3/sql/item_cmpfunc.cc:7315
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#13 0x000055da6b87a290 in Item_in_subselect::create_single_in_to_exists_cond (this=0x7f4740014438, join=0x7f4740015f40, where_item=0x7f4740016440, having_item=0x7f4740016448) at /home/psergey/dev-git/10.4-cl3/sql/item_subselect.cc:2206
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#14 0x000055da6b87c822 in Item_in_subselect::create_in_to_exists_cond (this=0x7f4740014438, join_arg=0x7f4740015f40) at /home/psergey/dev-git/10.4-cl3/sql/item_subselect.cc:2622
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#15 0x000055da6b62dc2d in JOIN::choose_subquery_plan (this=0x7f4740015f40, join_tables=1) at /home/psergey/dev-git/10.4-cl3/sql/opt_subselect.cc:6392
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#16 0x000055da6b4956d0 in make_join_statistics (join=0x7f4740015f40, tables_list=..., keyuse_array=0x7f4740016230) at /home/psergey/dev-git/10.4-cl3/sql/sql_select.cc:5601
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#17 0x000055da6b489275 in JOIN::optimize_inner (this=0x7f4740015f40) at /home/psergey/dev-git/10.4-cl3/sql/sql_select.cc:2260
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#18 0x000055da6b486bba in JOIN::optimize (this=0x7f4740015f40) at /home/psergey/dev-git/10.4-cl3/sql/sql_select.cc:1607
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#19 0x000055da6b492062 in mysql_select (thd=0x7f4740000d50, tables=0x7f4740013560, wild_num=0, fields=..., conds=0x0, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147748612, result=0x7f4740014fa0, unit=0x7f4740013c40, select_lex=0x7f4740012f88) at /home/psergey/dev-git/10.4-cl3/sql/sql_select.cc:4670
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#20 0x000055da6b4cf5e6 in mysql_explain_union (thd=0x7f4740000d50, unit=0x7f4740013c40, result=0x7f4740014fa0) at /home/psergey/dev-git/10.4-cl3/sql/sql_select.cc:26966
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#21 0x000055da6b4cf2e0 in select_describe (join=0x7f4740015618, need_tmp_table=false, need_order=false, distinct=false, message=0x0) at /home/psergey/dev-git/10.4-cl3/sql/sql_select.cc:26926
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#22 0x000055da6b49168c in JOIN::exec_inner (this=0x7f4740015618) at /home/psergey/dev-git/10.4-cl3/sql/sql_select.cc:4432
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#23 0x000055da6b4909e4 in JOIN::exec (this=0x7f4740015618) at /home/psergey/dev-git/10.4-cl3/sql/sql_select.cc:4252
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#24 0x000055da6b4920fb in mysql_select (thd=0x7f4740000d50, tables=0x7f47400127a0, wild_num=1, fields=..., conds=0x7f4740014438, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147748612, result=0x7f4740014fa0, unit=0x7f4740004c78, select_lex=0x7f47400121d0) at /home/psergey/dev-git/10.4-cl3/sql/sql_select.cc:4684
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