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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10.3(EOL), 10.4(EOL), 10.5, 10.6
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None
Description
The following test case causes an assertion failure in Debug build of the current 10.3 and most probably of all other versions:
create table t1 (a int);
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insert into t1 values (3), (2);
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create table t2 (b int);
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insert into t2 values (4), (2);
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create table t3 (c int);
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insert into t3 values (7), (1);
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select a from t1
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where a >= any (select b from t2 group by (select c from t3 where c = 1));
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drop table t1,t2,t3;
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The failure happens in item_subselect.cc():
4 0x00007fde8f9b1187 in raise () from /lib64/libc.so.6
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#5 0x00007fde8f9b2538 in abort () from /lib64/libc.so.6
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#6 0x00007fde8f9aa126 in __assert_fail_base () from /lib64/libc.so.6
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#7 0x00007fde8f9aa1d2 in __assert_fail () from /lib64/libc.so.6
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#8 0x00005618d77c3f94 in Item_subselect::exec (this=0x7fde78017750) at /home/igor/maria-git/10.3/sql/item_subselect.cc:766
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#9 0x00005618d77c6307 in Item_singlerow_subselect::val_str (this=0x7fde78017750, str=0x7fde78113020) at /home/igor/maria-git/10.3/sql/item_subselect.cc:1437
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#10 0x00005618d7710bbe in Item_copy_string::copy (this=0x7fde78112ff0) at /home/igor/maria-git/10.3/sql/item.cc:5281
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#11 0x00005618d7440132 in copy_fields (param=0x7fde7810e008) at /home/igor/maria-git/10.3/sql/sql_select.cc:24580
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#12 0x00005618d743796f in end_send_group (join=0x7fde7810de18, join_tab=0x7fde78112be0, end_of_records=false) at /home/igor/maria-git/10.3/sql/sql_select.cc:21282
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#13 0x00005618d7434687 in evaluate_join_record (join=0x7fde7810de18, join_tab=0x7fde78112850, error=0) at /home/igor/maria-git/10.3/sql/sql_select.cc:20119
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#14 0x00005618d7433ed9 in sub_select (join=0x7fde7810de18, join_tab=0x7fde78112850, end_of_records=false) at /home/igor/maria-git/10.3/sql/sql_select.cc:19892
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#15 0x00005618d7433356 in do_select (join=0x7fde7810de18, procedure=0x0) at /home/igor/maria-git/10.3/sql/sql_sel
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...
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Attachments
Activity
You do not dig deeper so this will crash server again:
diff --git a/mysql-test/main/subselect4.test b/mysql-test/main/subselect4.test
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index a59f4bbcdac..c41fbcfa7b7 100644
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--- a/mysql-test/main/subselect4.test
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+++ b/mysql-test/main/subselect4.test
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@@ -2452,7 +2452,7 @@ insert into t3 values (7), (1);
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let $q1=
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select a from t1
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- where a >= any (select b from t2 group by (select c from t3 where c = 1));
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+ where a >= any (select b from t2 group by 1 + (select c from t3 where c = 1));
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eval explain extended $q1;
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eval $q1;
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@@ -2464,7 +2464,7 @@ deallocate prepare stmt;
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let $q2=
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select a from t1
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- where a <= all (select b from t2 group by (select c from t3 where c = 1));
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+ where a <= all (select b from t2 group by 1 + (select c from t3 where c = 1));
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eval explain extended $q2;
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eval $q2;
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here is result:
CURRENT_TEST: main.subselect4
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mysqltest: At line 2458: query '$q1' failed: 2013: Lost connection to MySQL server during query
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The result from queries just before the failure was:
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< snip >
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DROP TABLE t1;
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# End of 10.2 tests
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#
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# MDEV-29139: Redundannt subquery in GROUP BY clause of ANY/ALL subquery
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#
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create table t1 (a int);
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insert into t1 values (3), (1), (2);
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create table t2 (b int not null);
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insert into t2 values (4), (2);
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create table t3 (c int);
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insert into t3 values (7), (1);
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explain extended select a from t1
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where a >= any (select b from t2 group by 1 + (select c from t3 where c = 1));
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 100.00
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where <nop>(<in_optimizer>(`test`.`t1`.`a`,(/* select#2 */ select min(`test`.`t2`.`b`) from `test`.`t2`) <= <cache>(`test`.`t1`.`a`)))
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select a from t1
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where a >= any (select b from t2 group by 1 + (select c from t3 where c = 1));
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More results from queries before failure can be found in /home/sanja/maria/git/10.3/mysql-test/var/log/subselect4.log
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Server [mysqld.1 - pid: 36431, winpid: 36431, exit: 256] failed during test run
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Server log from this test:
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----------SERVER LOG START-----------
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$ /home/sanja/maria/git/10.3/sql/mysqld --defaults-group-suffix=.1 --defaults-file=/home/sanja/maria/git/10.3/mysql-test/var/my.cnf --log-output=file --loose-sequence --core-file --loose-debug-sync-timeout=300
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2022-07-21 10:12:17 0 [Note] /home/sanja/maria/git/10.3/sql/mysqld (mysqld 10.3.36-MariaDB-debug-log) starting as process 36432 ...
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2022-07-21 10:12:17 0 [Warning] Could not increase number of max_open_files to more than 1024 (request: 32198)
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2022-07-21 10:12:17 0 [Warning] Changed limits: max_open_files: 1024 max_connections: 151 (was 151) table_cache: 421 (was 2000)
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2022-07-21 10:12:17 0 [Note] Plugin 'partition' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'InnoDB' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_DATAFILES' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_TABLESTATS' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_LOCKS' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_MUTEXES' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_CMPMEM' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_CMP_PER_INDEX' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_CMP' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_FT_DELETED' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_CMP_RESET' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_LOCK_WAITS' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_TABLESPACES_ENCRYPTION' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_BUFFER_PAGE_LRU' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_FIELDS' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_CMPMEM_RESET' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'FEEDBACK' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_COLUMNS' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_FT_INDEX_TABLE' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_CMP_PER_INDEX_RESET' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'user_variables' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_FT_INDEX_CACHE' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_FOREIGN_COLS' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_FT_BEING_DELETED' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_BUFFER_POOL_STATS' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_TRX' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_FOREIGN' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_TABLES' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_FT_DEFAULT_STOPWORD' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_FT_CONFIG' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_BUFFER_PAGE' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_TABLESPACES' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_METRICS' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_INDEXES' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_VIRTUAL' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_TABLESPACES_SCRUBBING' is disabled.
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2022-07-21 10:12:17 0 [Note] Plugin 'INNODB_SYS_SEMAPHORE_WAITS' is disabled.
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2022-07-21 10:12:17 0 [Warning] /home/sanja/maria/git/10.3/sql/mysqld: unknown option '--loose-pam-debug'
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2022-07-21 10:12:17 0 [Note] Server socket created on IP: '127.0.0.1'.
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2022-07-21 10:12:17 0 [Note] Reading of all Master_info entries succeeded
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2022-07-21 10:12:17 0 [Note] Added new Master_info '' to hash table
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2022-07-21 10:12:17 0 [Note] /home/sanja/maria/git/10.3/sql/mysqld: ready for connections.
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Version: '10.3.36-MariaDB-debug-log' socket: '/home/sanja/maria/git/10.3/mysql-test/var/tmp/mysqld.1.sock' port: 16000 Source distribution
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mysqld: /home/sanja/maria/git/10.3/sql/item_subselect.cc:766: virtual bool Item_subselect::exec(): Assertion `!eliminated' failed.
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220721 10:12:18 [ERROR] mysqld got signal 6 ;
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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: 10.3.36-MariaDB-debug-log
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key_buffer_size=1048576
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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 = 63289 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: 0x7fa0c0000da0
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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 = 0x7fa0dcddcda8 thread_stack 0x49000
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mysys/stacktrace.c:174(my_print_stacktrace)[0x560fb50d5ee5]
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sql/signal_handler.cc:231(handle_fatal_signal)[0x560fb47746dd]
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libc_sigaction.c:0(__restore_rt)[0x7fa0e2cf1520]
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nptl/pthread_kill.c:44(__pthread_kill_implementation)[0x7fa0e2d45a7c]
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posix/raise.c:27(__GI_raise)[0x7fa0e2cf1476]
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stdlib/abort.c:81(__GI_abort)[0x7fa0e2cd77f3]
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intl/loadmsgcat.c:1177(_nl_load_domain)[0x7fa0e2cd771b]
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:0(__GI___assert_fail)[0x7fa0e2ce8e96]
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sql/item_subselect.cc:768(Item_subselect::exec())[0x560fb485f780]
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sql/item_subselect.cc:1415(Item_singlerow_subselect::val_int())[0x560fb4861bfb]
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sql/item_func.cc:1213(Item_func_plus::int_op())[0x560fb4808fc6]
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sql/item_func.cc:854(Item_func_hybrid_field_type::val_str_from_int_op(String*))[0x560fb4807891]
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sql/sql_type.cc:3524(Type_handler_int_result::Item_func_hybrid_field_type_val_str(Item_func_hybrid_field_type*, String*) const)[0x560fb464ab83]
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/home/sanja/maria/git/10.3/sql/mysqld(_ZN27Item_func_hybrid_field_type7val_strEP6String+0xbf)[0x560fb440cfeb]
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/home/sanja/maria/git/10.3/sql/mysqld(_ZN16Item_copy_string4copyEv+0x42)[0x560fb47a42ba]
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sql/item_func.h:585(Item_func_hybrid_field_type::val_str(String*))[0x560fb44b5983]
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sql/item.cc:5281(Item_copy_string::copy())[0x560fb44acb1a]
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sql/sql_select.cc:24603(copy_fields(TMP_TABLE_PARAM*))[0x560fb44a9564]
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sql/sql_select.cc:21307(end_send_group(JOIN*, st_join_table*, bool))[0x560fb44a8cf6]
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sql/sql_select.cc:20143(evaluate_join_record(JOIN*, st_join_table*, int))[0x560fb44a8002]
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sql/sql_select.cc:19916(sub_select(JOIN*, st_join_table*, bool))[0x560fb447d0f9]
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sql/sql_select.cc:19454(do_select(JOIN*, Procedure*))[0x560fb447c2f6]
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sql/sql_select.cc:4172(JOIN::exec_inner())[0x560fb486d7cc]
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sql/sql_select.cc:3967(JOIN::exec())[0x560fb485f962]
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sql/item_subselect.cc:791(Item_subselect::exec())[0x560fb4861bfb]
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sql/item_subselect.cc:1415(Item_singlerow_subselect::val_int())[0x560fb47c4375]
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sql/item_cmpfunc.cc:916(Arg_comparator::compare_int_signed())[0x560fb47dac5e]
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sql/item_cmpfunc.h:102(Arg_comparator::compare())[0x560fb47c747f]
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sql/item_cmpfunc.cc:1795(Item_func_le::val_int())[0x560fb47c636c]
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sql/item_cmpfunc.cc:1541(Item_in_optimizer::val_int())[0x560fb47c188a]
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sql/item_cmpfunc.cc:284(Item_func_nop_all::val_int())[0x560fb44a9189]
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sql/sql_select.cc:20011(evaluate_join_record(JOIN*, st_join_table*, int))[0x560fb44a8cf6]
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sql/sql_select.cc:19916(sub_select(JOIN*, st_join_table*, bool))[0x560fb44a8002]
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sql/sql_select.cc:19454(do_select(JOIN*, Procedure*))[0x560fb447d0f9]
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sql/sql_select.cc:4172(JOIN::exec_inner())[0x560fb447c2f6]
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sql/sql_select.cc:3967(JOIN::exec())[0x560fb447d926]
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sql/sql_select.cc:4377(mysql_select(THD*, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*))[0x560fb446e378]
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sql/sql_select.cc:372(handle_select(THD*, LEX*, select_result*, unsigned long))[0x560fb4430ce9]
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sql/sql_parse.cc:6339(execute_sqlcom_select(THD*, TABLE_LIST*))[0x560fb4427406]
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sql/sql_parse.cc:3870(mysql_execute_command(THD*))[0x560fb44354e5]
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sql/sql_parse.cc:7870(mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool))[0x560fb442113a]
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sql/sql_parse.cc:1855(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool))[0x560fb441fa06]
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sql/sql_parse.cc:1398(do_command(THD*))[0x560fb45b1f85]
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sql/sql_connect.cc:1403(do_handle_one_connection(CONNECT*))[0x560fb45b1ce5]
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sql/sql_connect.cc:1309(handle_one_connection)[0x560fb50056ec]
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nptl/pthread_create.c:442(start_thread)[0x7fa0e2d43b43]
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x86_64/clone3.S:83(__clone3)[0x7fa0e2dd5a00]
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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 (0x7fa0c0012ae8): select a from t1
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where a >= any (select b from t2 group by 1 + (select c from t3 where c = 1))
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Connection ID (thread ID): 4
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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=on,condition_pushdown_for_derived=on,split_materialized=on
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The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/ contains
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information that should help you find out what is causing the crash.
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Writing a core file...
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Working directory at /dev/shm/var_auto_sr36/mysqld.1/data
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Resource Limits:
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Limit Soft Limit Hard Limit Units
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Max cpu time unlimited unlimited seconds
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Max file size unlimited unlimited bytes
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Max data size unlimited unlimited bytes
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Max stack size 8388608 unlimited bytes
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Max core file size unlimited unlimited bytes
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Max resident set unlimited unlimited bytes
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Max processes 255871 255871 processes
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Max open files 1024 1024 files
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Max locked memory 8393273344 8393273344 bytes
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Max address space unlimited unlimited bytes
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Max file locks unlimited unlimited locks
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Max pending signals 255871 255871 signals
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Max msgqueue size 819200 819200 bytes
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Max nice priority 0 0
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Max realtime priority 0 0
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Max realtime timeout unlimited unlimited us
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Core pattern: |/usr/share/apport/apport -p%p -s%s -c%c -d%d -P%P -u%u -g%g -- %E
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Kernel version: Linux version 5.15.0-41-generic (buildd@lcy02-amd64-065) (gcc (Ubuntu 11.2.0-19ubuntu1) 11.2.0, GNU ld (GNU Binutils for Ubuntu) 2.38) #44-Ubuntu SMP Wed Jun 22 14:20:53 UTC 2022
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----------SERVER LOG END-------------
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A fix for this bug was pushed into 10.3