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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10.1(EOL), 10.2(EOL), 10.3(EOL), 10.4(EOL), 10.5
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None
Description
CREATE TABLE t (a INT); |
SET SESSION character_set_connection= utf16le; |
CREATE VIEW v AS SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = 't1'; |
SELECT * FROM v; |
LOCK TABLE t WRITE; |
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# Cleanup
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DROP TABLE t; |
The result of SELECT * FROM v is already wrong, it returns the data for table t:
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10.3 b3e9798f |
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME TABLE_TYPE ENGINE VERSION ROW_FORMAT TABLE_ROWS AVG_ROW_LENGTH DATA_LENGTH MAX_DATA_LENGTH INDEX_LENGTH DATA_FREE AUTO_INCREMENT CREATE_TIME UPDATE_TIME CHECK_TIME TABLE_COLLATION CHECKSUM CREATE_OPTIONS TABLE_COMMENT MAX_INDEX_LENGTH TEMPORARY |
def test t1 BASE TABLE MyISAM 10 Fixed 0 0 0 1970324836974591 1024 0 NULL 2020-08-05 15:09:36 2020-08-05 15:09:36 NULL latin1_swedish_ci NULL 17179868160 N |
The wrong result is reproducible on 10.1-10.5, debug and non-debug alike.
On 10.3+ debug builds, further LOCK causes the assertion failure:
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10.3 b3e9798f |
mysqld: /data/src/10.3/sql/table.h:2082: void TABLE_LIST::init_one_table(const LEX_CSTRING*, const LEX_CSTRING*, const LEX_CSTRING*, thr_lock_type): Assertion `!alias_arg || strlen(alias_arg->str) == alias_arg->length' failed.
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200805 15:09:36 [ERROR] mysqld got signal 6 ;
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#7 0x00007ffacb9b3f12 in __GI___assert_fail (assertion=0x557143ef7650 "!alias_arg || strlen(alias_arg->str) == alias_arg->length", file=0x557143ef75de "/data/src/10.3/sql/table.h", line=2082, function=0x557143efa000 <TABLE_LIST::init_one_table(st_mysql_const_lex_string const*, st_mysql_const_lex_string const*, st_mysql_const_lex_string const*, thr_lock_type)::__PRETTY_FUNCTION__> "void TABLE_LIST::init_one_table(const LEX_CSTRING*, const LEX_CSTRING*, const LEX_CSTRING*, thr_lock_type)") at assert.c:101
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#8 0x00005571431d5820 in TABLE_LIST::init_one_table (this=0x7ffab4071df8, db_arg=0x7ffac5bb1c20, table_name_arg=0x7ffac5bb1c30, alias_arg=0x7ffac5bb1c40, lock_type_arg=TL_WRITE) at /data/src/10.3/sql/table.h:2082
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#9 0x0000557143217751 in Locked_tables_list::init_locked_tables (this=0x7ffab4004800, thd=0x7ffab4000af0) at /data/src/10.3/sql/sql_base.cc:2210
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#10 0x00005571432abbe7 in lock_tables_open_and_lock_tables (thd=0x7ffab4000af0, tables=0x7ffab40128f0) at /data/src/10.3/sql/sql_parse.cc:2919
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#11 0x00005571432b2798 in mysql_execute_command (thd=0x7ffab4000af0) at /data/src/10.3/sql/sql_parse.cc:4941
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#12 0x00005571432bc40d in mysql_parse (thd=0x7ffab4000af0, rawbuf=0x7ffab4012818 "LOCK TABLE t WRITE", length=18, parser_state=0x7ffac5bb25e0, is_com_multi=false, is_next_command=false) at /data/src/10.3/sql/sql_parse.cc:7810
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#13 0x00005571432a8c54 in dispatch_command (command=COM_QUERY, thd=0x7ffab4000af0, packet=0x7ffab41234d1 "LOCK TABLE t WRITE", packet_length=18, is_com_multi=false, is_next_command=false) at /data/src/10.3/sql/sql_parse.cc:1848
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#14 0x00005571432a756c in do_command (thd=0x7ffab4000af0) at /data/src/10.3/sql/sql_parse.cc:1393
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#15 0x0000557143420d5d in do_handle_one_connection (connect=0x557146dad380) at /data/src/10.3/sql/sql_connect.cc:1403
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#16 0x0000557143420abf in handle_one_connection (arg=0x557146dad380) at /data/src/10.3/sql/sql_connect.cc:1308
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#17 0x0000557143dd970c in pfs_spawn_thread (arg=0x557146dc8430) at /data/src/10.3/storage/perfschema/pfs.cc:1869
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#18 0x00007ffacd93c4a4 in start_thread (arg=0x7ffac5bb3700) at pthread_create.c:456
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#19 0x00007ffacba70d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97
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