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DESC sys.schema_table_lock_waits;
Field Type Null Key Default Extra
object_schema varchar(64) YES NULL
object_name varchar(64) YES NULL
waiting_thread_id bigint(20) unsigned NO NULL
waiting_pid bigint(20) unsigned YES NULL
waiting_account text YES NULL
waiting_lock_type varchar(32) NO NULL
waiting_lock_duration varchar(32) NO NULL
waiting_query longtext YES NULL
waiting_query_secs bigint(20) YES NULL
waiting_query_rows_affected bigint(20) unsigned YES NULL
waiting_query_rows_examined bigint(20) unsigned YES NULL
blocking_thread_id bigint(20) unsigned NO NULL
blocking_pid bigint(20) unsigned YES NULL
blocking_account text YES NULL
blocking_lock_type varchar(32) NO NULL
blocking_lock_duration varchar(32) NO NULL
sql_kill_blocking_query varchar(31) YES NULL
sql_kill_blocking_connection varchar(25) YES NULL
SELECT * FROM sys.schema_table_lock_waits;
DESC sys.x$schema_table_lock_waits;
Field Type Null Key Default Extra
object_schema varchar(64) YES NULL
object_name varchar(64) YES NULL
waiting_thread_id bigint(20) unsigned NO NULL
waiting_pid bigint(20) unsigned YES NULL
waiting_account text YES NULL
waiting_lock_type varchar(32) NO NULL
waiting_lock_duration varchar(32) NO NULL
waiting_query longtext YES NULL
waiting_query_secs bigint(20) YES NULL
waiting_query_rows_affected bigint(20) unsigned YES NULL
waiting_query_rows_examined bigint(20) unsigned YES NULL
blocking_thread_id bigint(20) unsigned NO NULL
blocking_pid bigint(20) unsigned YES NULL
blocking_account text YES NULL
blocking_lock_type varchar(32) NO NULL
blocking_lock_duration varchar(32) NO NULL
sql_kill_blocking_query varchar(31) YES NULL
sql_kill_blocking_connection varchar(25) YES NULL
SELECT * FROM sys.x$schema_table_lock_waits;
connect con1,localhost,root,,;
connect con2,localhost,root,,;
connection con1;
CREATE TABLE test.lock_waits (i INT PRIMARY KEY, j INT) ENGINE = InnoDB;
LOCK TABLE lock_waits WRITE;
connection con2;
ALTER TABLE test.lock_waits ADD k VARCHAR(20);
connection default;
SELECT object_schema, object_name,
waiting_account, waiting_lock_type, waiting_query,
blocking_account, blocking_lock_type, blocking_lock_duration
FROM sys.schema_table_lock_waits;
object_schema object_name waiting_account waiting_lock_type waiting_query blocking_account blocking_lock_type blocking_lock_duration
test lock_waits root@localhost SHARED_UPGRADABLE ALTER TABLE test.lock_waits ADD k VARCHAR(20) root@localhost SHARED_NO_READ_WRITE TRANSACTION
disconnect con1;
connection default;
disconnect con2;
connection default;
DROP TABLE test.lock_waits;
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