Details
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Bug
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Status: In Progress (View Workflow)
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Major
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Resolution: Unresolved
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None
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None
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Can result in hang or crash
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Q2/2026 Server Development
Description
Server Crash seen while testing MDEV-39014
Issue:
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mariadbd: /home/ppandith/wl-39014/sql/opt_table_elimination.cc:858: bool eliminate_tables_for_list(JOIN*, List<TABLE_LIST>, table_map, Item, table_map, Json_writer_array*): Assertion `!tbl->nested_join || tbl->sj_on_expr' failed.
260514 11:35:46 [ERROR] ./sql/mariadbd got signal 6 ;
Version:
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Branch : 13.2-mdev-39014-full-join-p2
commit : 95ab071bead67a564f7a8fbcb0a6fc3b377efbe2
Version : 13.0.1
How to Repro:
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create table A(pk int); |
SELECT * FROM ( A , ( SELECT alias1.pk FROM A as alias1 FULL JOIN A on(1) ) as dt); |
Stack trace:
#0 __pthread_kill_implementation (no_tid=0, signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:44
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#1 __pthread_kill_internal (signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:78
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#2 __GI___pthread_kill (threadid=<optimized out>, signo=6) at ./nptl/pthread_kill.c:89
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#3 my_write_core (sig=6) at /home/ppandith/wl-39014/mysys/stacktrace.c:424
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#4 handle_fatal_signal (sig=6) at /home/ppandith/wl-39014/sql/signal_handler.cc:298
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#5 <signal handler called>
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#6 __pthread_kill_implementation (no_tid=0, signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:44
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#7 __pthread_kill_internal (signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:78
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#8 __GI___pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ./nptl/pthread_kill.c:89
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#9 __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
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#10 __GI_abort () at ./stdlib/abort.c:79
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#11 __assert_fail_base (fmt="%s%s%s:%u: %s%sAssertion `%s' failed.\n%n",
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assertion=assertion@entry="!tbl->nested_join || tbl->sj_on_expr",
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file=file@entry="/home/ppandith/wl-39014/sql/opt_table_elimination.cc", line=line@entry=858,
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function=function@entry="bool eliminate_tables_for_list(JOIN*, List<TABLE_LIST>*, table_map, Item*, table_map, Json_writer_array*)") at ./assert/assert.c:96
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#12 __assert_fail (assertion="!tbl->nested_join || tbl->sj_on_expr", file="/home/ppandith/wl-39014/sql/opt_table_elimination.cc",
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line=858, function="bool eliminate_tables_for_list(JOIN*, List<TABLE_LIST>*, table_map, Item*, table_map, Json_writer_array*)")
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at ./assert/assert.c:105
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#13 eliminate_tables_for_list (join=, join_list=, list_tables=7, on_expr=, tables_used_elsewhere=3, trace_eliminate_tables=)
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at /home/ppandith/wl-39014/sql/opt_table_elimination.cc:858
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#14 eliminate_tables (join=) at /home/ppandith/wl-39014/sql/opt_table_elimination.cc:765
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#15 make_join_statistics (join=, tables_list=..., keyuse_array=) at /home/ppandith/wl-39014/sql/sql_select.cc:6032
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#16 JOIN::optimize_inner (this=) at /home/ppandith/wl-39014/sql/sql_select.cc:2882
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#17 JOIN::optimize (this=) at /home/ppandith/wl-39014/sql/sql_select.cc:2132
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#18 mysql_select (thd=, tables=, fields=..., conds=, og_num=0, order=, group=, having=, proc_param=, select_options=2164525824,
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result=, unit=, select_lex=) at /home/ppandith/wl-39014/sql/sql_select.cc:5544
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#19 handle_select (thd=, lex=, result=, setup_tables_done_option=0) at /home/ppandith/wl-39014/sql/sql_select.cc:752
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#20 execute_sqlcom_select (thd=, all_tables=) at /home/ppandith/wl-39014/sql/sql_parse.cc:6213
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#21 mysql_execute_command (thd=, is_called_from_prepared_stmt=false) at /home/ppandith/wl-39014/sql/sql_parse.cc:3989
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#22 mysql_parse (thd=, rawbuf="SELECT * FROM ( A , ( SELECT alias1.pk FROM A as alias1 FULL JOIN A on(1) ) as dt)", length=82,
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parser_state=) at /home/ppandith/wl-39014/sql/sql_parse.cc:7941
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#23 dispatch_command (command=COM_QUERY, thd=,
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packet="SELECT * FROM ( A , ( SELECT alias1.pk FROM A as alias1 FULL JOIN A on(1) ) as dt)", packet_length=82, blocking=true)
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at /home/ppandith/wl-39014/sql/sql_parse.cc:1898
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#24 do_command (thd=, blocking=true) at /home/ppandith/wl-39014/sql/sql_parse.cc:1432
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#25 do_handle_one_connection (connect=, put_in_cache=true) at /home/ppandith/wl-39014/sql/sql_connect.cc:1503
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#26 handle_one_connection (arg=) at /home/ppandith/wl-39014/sql/sql_connect.cc:1415
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#27 pfs_spawn_thread (arg=) at /home/ppandith/wl-39014/storage/perfschema/pfs.cc:2198
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#28 start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:447
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#29 clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
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Attachments
Issue Links
- relates to
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MDEV-39014 FULL JOIN Algorithm, Phase 2
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- In Review
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