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################################################################################
# #
# Variable Name: sql_low_priority_updates #
# Scope: GLOBAL & SESSION #
# Access Type: Dynamic #
# Data Type: BOOLEAN #
# Default Value: 1 TRUE #
# Values: 1 TRUE, 0 FALSE #
# #
# #
# Creation Date: 2008-02-25 #
# Author: Sharique Abdullah #
# #
# Description: Test Cases of Dynamic System Variable sql_low_priority_updates #
# that checks behavior of this variable in the following ways #
# * Functionality based on different values #
# #
# Reference: http://dev.mysql.com/doc/refman/5.1/en/set-option.html #
# #
################################################################################
--source include/not_embedded.inc
################################################################
# sql_low_priority_updates was renamed to low_priority_updates #
################################################################
--echo ** Setup **
--echo
#
# Setup
#
connect (con0,localhost,root,,);
connect (con1,localhost,root,,);
connection default;
SET @global_low_priority_updates = @@GLOBAL.low_priority_updates;
SET @session_low_priority_updates = @@SESSION.low_priority_updates;
#
# Create Table
#
CREATE TABLE t1 (a varchar(100));
create view v1 as select * from t1;
--echo '#--------------------FN_DYNVARS_160_01-------------------------#'
#
# Value ON
#
connection con0;
SET SESSION low_priority_updates = ON;
connection con1;
SET SESSION low_priority_updates = ON;
connection default;
SET SESSION low_priority_updates = ON;
INSERT INTO t1 VALUES('1');
INSERT INTO t1 VALUES('2');
INSERT INTO t1 VALUES('3');
INSERT INTO t1 VALUES('4');
INSERT INTO t1 VALUES('5');
INSERT INTO t1 VALUES('6');
LOCK TABLE v1 WRITE CONCURRENT;
connection con1;
--echo ** Asynchronous Execution **
delimiter |;
send
UPDATE t1 SET a = CONCAT(a,"-updated");|
delimiter ;|
connection con0;
let $wait_condition = SELECT COUNT(*) > 0 FROM information_schema.processlist
WHERE state='Waiting for table level lock' AND
info LIKE 'UPDATE t1 SET a = CONCAT(a,"-updated")';
--source include/wait_condition.inc
--echo ** Asynchronous Execution **
delimiter |;
send
LOCK TABLE t1 READ;
SELECT * FROM t1;
UNLOCK TABLES;|
delimiter ;|
connection default;
let $wait_condition= SELECT count(*) = 2 FROM information_schema.processlist
WHERE state LIKE 'Waiting for table level lock';
--source include/wait_condition.inc
UNLOCK TABLES;
connection con0;
--echo ** Asynchronous Result **
reap;
--echo Expected values of a without -updated;
connection default;
DELETE FROM t1;
--echo '#--------------------FN_DYNVARS_160_02-------------------------#'
#
# Value ON
#
connection con0;
SET SESSION low_priority_updates = OFF;
connection con1;
reap;
SET SESSION low_priority_updates = OFF;
connection default;
SET SESSION low_priority_updates = OFF;
INSERT INTO t1 VALUES('1');
INSERT INTO t1 VALUES('2');
INSERT INTO t1 VALUES('3');
INSERT INTO t1 VALUES('4');
INSERT INTO t1 VALUES('5');
INSERT INTO t1 VALUES('6');
LOCK TABLE v1 READ;
connection con1;
--echo ** Asynchronous Execution **
delimiter |;
send
UPDATE t1 SET a = CONCAT(a,"-updated");|
delimiter ;|
connection con0;
let $wait_condition = SELECT COUNT(*) > 0 FROM information_schema.processlist
WHERE state='Waiting for table level lock' AND
info LIKE 'UPDATE t1 SET a = CONCAT(a,"-updated")';
--source include/wait_condition.inc
--echo ** Asynchronous Execution **
delimiter |;
send
LOCK TABLE t1 READ;
SELECT * FROM t1;
UNLOCK TABLES;|
delimiter ;|
connection default;
let $wait_condition= SELECT count(*) = 2 FROM information_schema.processlist
WHERE state LIKE 'Waiting for table level lock';
--source include/wait_condition.inc
UNLOCK TABLES;
connection con0;
--echo ** Asynchronous Result **
reap;
--echo Expected values of a with -updated;
connection default;
DELETE FROM t1;
--echo '#--------------------FN_DYNVARS_160_03-------------------------#'
#
# Session data integrity check & GLOBAL Value check
#
connect (con_int1,localhost,root,,);
connection con_int1;
SELECT @@SESSION.low_priority_updates;
--echo 1 / TRUE Expected
SET SESSION low_priority_updates = FALSE;
connect (con_int2,localhost,root,,);
connection con_int2;
SELECT @@SESSION.low_priority_updates;
--echo 1 / TRUE Expected
SET SESSION low_priority_updates = TRUE;
connection con_int1;
SELECT @@SESSION.low_priority_updates;
--echo 0 / FALSE Expected
connection con_int2;
SELECT @@SESSION.low_priority_updates;
--echo 1 / TRUE Expected
connection default;
disconnect con_int1;
disconnect con_int2;
#
# Cleanup
#
connection default;
disconnect con0;
disconnect con1;
drop view v1;
DROP TABLE t1;
SET @@GLOBAL.low_priority_updates = @global_low_priority_updates;
SET @@SESSION.low_priority_updates = @session_low_priority_updates;
|
