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MDEV-9728 - Hard crash in metadata_lock_info

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Disable output of MDL lock duration since there is no facility to retreive
it properly.
This commit is contained in:
Sergey Vojtovich 2016-06-23 12:16:20 +04:00
parent 4abeebeed7
commit f289f3ee9c
6 changed files with 42 additions and 49 deletions
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68
mysql-test/r/create_or_replace.result
View File

@ -264,11 +264,11 @@ create table mysqltest2.t2 like test.t1;
lock table test.t1 write, mysqltest2.t2 write;
select * from information_schema.metadata_lock_info;
THREAD_ID LOCK_MODE LOCK_DURATION LOCK_TYPE TABLE_SCHEMA TABLE_NAME
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Global read lock
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Schema metadata lock mysqltest2
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Schema metadata lock test
# MDL_SHARED_NO_READ_WRITE MDL_EXPLICIT Table metadata lock mysqltest2 t2
# MDL_SHARED_NO_READ_WRITE MDL_EXPLICIT Table metadata lock test t1
# MDL_INTENTION_EXCLUSIVE NULL Global read lock
# MDL_INTENTION_EXCLUSIVE NULL Schema metadata lock mysqltest2
# MDL_INTENTION_EXCLUSIVE NULL Schema metadata lock test
# MDL_SHARED_NO_READ_WRITE NULL Table metadata lock mysqltest2 t2
# MDL_SHARED_NO_READ_WRITE NULL Table metadata lock test t1
create or replace table test.t1;
ERROR 42000: A table must have at least 1 column
show tables;
@ -276,10 +276,10 @@ Tables_in_test
t2
select * from information_schema.metadata_lock_info;
THREAD_ID LOCK_MODE LOCK_DURATION LOCK_TYPE TABLE_SCHEMA TABLE_NAME
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Global read lock
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Schema metadata lock mysqltest2
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Schema metadata lock test
# MDL_SHARED_NO_READ_WRITE MDL_EXPLICIT Table metadata lock mysqltest2 t2
# MDL_INTENTION_EXCLUSIVE NULL Global read lock
# MDL_INTENTION_EXCLUSIVE NULL Schema metadata lock mysqltest2
# MDL_INTENTION_EXCLUSIVE NULL Schema metadata lock test
# MDL_SHARED_NO_READ_WRITE NULL Table metadata lock mysqltest2 t2
create or replace table mysqltest2.t2;
ERROR 42000: A table must have at least 1 column
select * from information_schema.metadata_lock_info;
@ -291,11 +291,11 @@ create table mysqltest2.t2 like test.t1;
lock table test.t1 write, mysqltest2.t2 write;
select * from information_schema.metadata_lock_info;
THREAD_ID LOCK_MODE LOCK_DURATION LOCK_TYPE TABLE_SCHEMA TABLE_NAME
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Global read lock
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Schema metadata lock mysqltest2
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Schema metadata lock test
# MDL_SHARED_NO_READ_WRITE MDL_EXPLICIT Table metadata lock mysqltest2 t2
# MDL_SHARED_NO_READ_WRITE MDL_EXPLICIT Table metadata lock test t1
# MDL_INTENTION_EXCLUSIVE NULL Global read lock
# MDL_INTENTION_EXCLUSIVE NULL Schema metadata lock mysqltest2
# MDL_INTENTION_EXCLUSIVE NULL Schema metadata lock test
# MDL_SHARED_NO_READ_WRITE NULL Table metadata lock mysqltest2 t2
# MDL_SHARED_NO_READ_WRITE NULL Table metadata lock test t1
create or replace table test.t1 (a int) select 1 as 'a', 2 as 'a';
ERROR 42S21: Duplicate column name 'a'
show tables;
@ -303,10 +303,10 @@ Tables_in_test
t2
select * from information_schema.metadata_lock_info;
THREAD_ID LOCK_MODE LOCK_DURATION LOCK_TYPE TABLE_SCHEMA TABLE_NAME
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Global read lock
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Schema metadata lock mysqltest2
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Schema metadata lock test
# MDL_SHARED_NO_READ_WRITE MDL_EXPLICIT Table metadata lock mysqltest2 t2
# MDL_INTENTION_EXCLUSIVE NULL Global read lock
# MDL_INTENTION_EXCLUSIVE NULL Schema metadata lock mysqltest2
# MDL_INTENTION_EXCLUSIVE NULL Schema metadata lock test
# MDL_SHARED_NO_READ_WRITE NULL Table metadata lock mysqltest2 t2
create or replace table mysqltest2.t2 (a int) select 1 as 'a', 2 as 'a';
ERROR 42S21: Duplicate column name 'a'
select * from information_schema.metadata_lock_info;
@ -400,31 +400,31 @@ create table t1 (a int);
lock table t1 write, t2 read;
select * from information_schema.metadata_lock_info;
THREAD_ID LOCK_MODE LOCK_DURATION LOCK_TYPE TABLE_SCHEMA TABLE_NAME
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Global read lock
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Schema metadata lock test
# MDL_SHARED_NO_READ_WRITE MDL_EXPLICIT Table metadata lock test t1
# MDL_SHARED_READ MDL_EXPLICIT Table metadata lock test t2
# MDL_INTENTION_EXCLUSIVE NULL Global read lock
# MDL_INTENTION_EXCLUSIVE NULL Schema metadata lock test
# MDL_SHARED_NO_READ_WRITE NULL Table metadata lock test t1
# MDL_SHARED_READ NULL Table metadata lock test t2
create or replace table t1 (i int);
select * from information_schema.metadata_lock_info;
THREAD_ID LOCK_MODE LOCK_DURATION LOCK_TYPE TABLE_SCHEMA TABLE_NAME
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Global read lock
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Schema metadata lock test
# MDL_SHARED_NO_READ_WRITE MDL_EXPLICIT Table metadata lock test t1
# MDL_SHARED_READ MDL_EXPLICIT Table metadata lock test t2
# MDL_INTENTION_EXCLUSIVE NULL Global read lock
# MDL_INTENTION_EXCLUSIVE NULL Schema metadata lock test
# MDL_SHARED_NO_READ_WRITE NULL Table metadata lock test t1
# MDL_SHARED_READ NULL Table metadata lock test t2
create or replace table t1 like t2;
select * from information_schema.metadata_lock_info;
THREAD_ID LOCK_MODE LOCK_DURATION LOCK_TYPE TABLE_SCHEMA TABLE_NAME
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Global read lock
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Schema metadata lock test
# MDL_SHARED_NO_READ_WRITE MDL_EXPLICIT Table metadata lock test t1
# MDL_SHARED_READ MDL_EXPLICIT Table metadata lock test t2
# MDL_INTENTION_EXCLUSIVE NULL Global read lock
# MDL_INTENTION_EXCLUSIVE NULL Schema metadata lock test
# MDL_SHARED_NO_READ_WRITE NULL Table metadata lock test t1
# MDL_SHARED_READ NULL Table metadata lock test t2
create or replace table t1 select 1 as f1;
select * from information_schema.metadata_lock_info;
THREAD_ID LOCK_MODE LOCK_DURATION LOCK_TYPE TABLE_SCHEMA TABLE_NAME
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Global read lock
# MDL_INTENTION_EXCLUSIVE MDL_EXPLICIT Schema metadata lock test
# MDL_SHARED_NO_READ_WRITE MDL_EXPLICIT Table metadata lock test t1
# MDL_SHARED_READ MDL_EXPLICIT Table metadata lock test t2
# MDL_INTENTION_EXCLUSIVE NULL Global read lock
# MDL_INTENTION_EXCLUSIVE NULL Schema metadata lock test
# MDL_SHARED_NO_READ_WRITE NULL Table metadata lock test t1
# MDL_SHARED_READ NULL Table metadata lock test t2
drop table t1;
unlock tables;
#

10
plugin/metadata_lock_info/metadata_lock_info.cc
View File

@ -81,25 +81,17 @@ int i_s_metadata_lock_info_fill_row(
THD *thd = param->thd;
TABLE *table = param->table;
DBUG_ENTER("i_s_metadata_lock_info_fill_row");
MDL_request mdl_request;
enum_mdl_duration mdl_duration;
MDL_context *mdl_ctx = mdl_ticket->get_ctx();
enum_mdl_type mdl_ticket_type = mdl_ticket->get_type();
MDL_key *mdl_key = mdl_ticket->get_key();
MDL_key::enum_mdl_namespace mdl_namespace = mdl_key->mdl_namespace();
mdl_request.init(mdl_key, mdl_ticket_type, MDL_STATEMENT);
mdl_ctx->find_ticket(&mdl_request, &mdl_duration);
table->field[0]->store((longlong) mdl_ctx->get_thread_id(), TRUE);
table->field[1]->set_notnull();
table->field[1]->store(
metadata_lock_info_lock_mode[(int) mdl_ticket_type].str,
metadata_lock_info_lock_mode[(int) mdl_ticket_type].length,
system_charset_info);
table->field[2]->set_notnull();
table->field[2]->store(
metadata_lock_info_duration[(int) mdl_duration].str,
metadata_lock_info_duration[(int) mdl_duration].length,
system_charset_info);
table->field[2]->set_null();
table->field[3]->set_notnull();
table->field[3]->store(
metadata_lock_info_lock_name[(int) mdl_namespace].str,

6
plugin/metadata_lock_info/mysql-test/metadata_lock_info/r/global_read_lock.result
View File

@ -1,10 +1,10 @@
SELECT lock_mode, lock_duration, lock_type, table_schema, table_name FROM information_schema.metadata_lock_info;
lock_mode lock_duration lock_type table_schema table_name
FLUSH TABLES WITH READ LOCK;
SELECT lock_mode, lock_duration, lock_type, table_schema, table_name FROM information_schema.metadata_lock_info ORDER BY lock_type DESC;
SELECT lock_mode, lock_duration, lock_type, table_schema, table_name FROM information_schema.metadata_lock_info;
lock_mode lock_duration lock_type table_schema table_name
MDL_SHARED MDL_EXPLICIT Global read lock
MDL_SHARED MDL_EXPLICIT Commit lock
MDL_SHARED NULL Commit lock
MDL_SHARED NULL Global read lock
UNLOCK TABLES;
SELECT lock_mode, lock_duration, lock_type, table_schema, table_name FROM information_schema.metadata_lock_info;
lock_mode lock_duration lock_type table_schema table_name

2
plugin/metadata_lock_info/mysql-test/metadata_lock_info/r/table_metadata_lock.result
View File

@ -6,7 +6,7 @@ SELECT * FROM t1;
a
SELECT lock_mode, lock_duration, lock_type, table_schema, table_name FROM information_schema.metadata_lock_info;
lock_mode lock_duration lock_type table_schema table_name
MDL_SHARED_READ MDL_TRANSACTION Table metadata lock test t1
MDL_SHARED_READ NULL Table metadata lock test t1
ROLLBACK;
SELECT lock_mode, lock_duration, lock_type, table_schema, table_name FROM information_schema.metadata_lock_info;
lock_mode lock_duration lock_type table_schema table_name

2
plugin/metadata_lock_info/mysql-test/metadata_lock_info/r/user_lock.result
View File

@ -5,7 +5,7 @@ GET_LOCK('LOCK1',0)
1
SELECT lock_mode, lock_duration, lock_type, table_schema, table_name FROM information_schema.metadata_lock_info;
lock_mode lock_duration lock_type table_schema table_name
MDL_SHARED_NO_WRITE MDL_EXPLICIT User lock LOCK1
MDL_SHARED_NO_WRITE NULL User lock LOCK1
SELECT RELEASE_LOCK('LOCK1');
RELEASE_LOCK('LOCK1')
1

3
plugin/metadata_lock_info/mysql-test/metadata_lock_info/t/global_read_lock.test
View File

@ -1,5 +1,6 @@
SELECT lock_mode, lock_duration, lock_type, table_schema, table_name FROM information_schema.metadata_lock_info;
FLUSH TABLES WITH READ LOCK;
SELECT lock_mode, lock_duration, lock_type, table_schema, table_name FROM information_schema.metadata_lock_info ORDER BY lock_type DESC;
--sorted_result
SELECT lock_mode, lock_duration, lock_type, table_schema, table_name FROM information_schema.metadata_lock_info;
UNLOCK TABLES;
SELECT lock_mode, lock_duration, lock_type, table_schema, table_name FROM information_schema.metadata_lock_info;