WAIT and NOWAIT
Extended syntax so that it is possible to set innodb_lock_wait_timeout and lock_wait_timeout for the following statements:
Syntax
ALTER TABLE tbl_name [WAIT n|NOWAIT] ...
CREATE ... INDEX ON tbl_name (index_col_name, ...) [WAIT n|NOWAIT] ...
DROP INDEX ... [WAIT n|NOWAIT]
DROP TABLE tbl_name [WAIT n|NOWAIT] ...
LOCK TABLE ... [WAIT n|NOWAIT]
OPTIMIZE TABLE tbl_name [WAIT n|NOWAIT]
RENAME TABLE tbl_name [WAIT n|NOWAIT] ...
SELECT ... FOR UPDATE [WAIT n|NOWAIT]
SELECT ... LOCK IN SHARE MODE [WAIT n|NOWAIT]
TRUNCATE TABLE tbl_name [WAIT n|NOWAIT]
Description
The lock wait timeout can be explicitly set in the statement by using either WAIT n
(to set the wait in seconds) or NOWAIT
, in which case the statement will immediately fail if the lock cannot be obtained. WAIT 0
is equivalent to NOWAIT
.
See Also
This page is licensed: CC BY-SA / Gnu FDL
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