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Directory :  /www/server/mysql/mysql-test/suite/sys_vars/t/

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Current File : /www/server/mysql/mysql-test/suite/sys_vars/t/key_buffer_size_func.test
################### mysql-test\t\key_buffer_size_func.test ####################
#                                                                             #
# Variable Name: key_buffer_size                                              #
# Scope: GLOBAL                                                               #
# Access Type: Dynamic                                                        #
# Data Type: numeric                                                          #
# Default Value: 131072                                                       #
# Range:8-4294967295                                                          #
#                                                                             #
#                                                                             #
# Creation Date: 2008-03-07                                                   #
# Author:  Salman Rawala                                                      #
#                                                                             #
# Description: Test Cases of Dynamic System Variable key_buffer_size          #
#              that checks the functionality of this variable                 #
#                                                                             #
# Reference:                                                                  #
#    http://dev.mysql.com/doc/refman/5.1/en/server-system-variables.html      #
#                                                                             #
###############################################################################

--disable_warnings
DROP TABLE IF EXISTS t1;
--enable_warnings

#########################
#   Creating new table  #
#########################

--echo ## Creating new table t1 ##
CREATE TABLE t1
(
id INT NOT NULL AUTO_INCREMENT,
PRIMARY KEY (id),
rollno INT NOT NULL,
name VARCHAR(30)
);

SET @start_value= @@global.key_buffer_size;

FLUSH STATUS;

--echo '#--------------------FN_DYNVARS_055_01-------------------------#'
########################################################################
#    Setting initial value of key_buffer_size, inserting some rows
#    & creating 2 new connections
########################################################################

--echo ## Setting initial value of variable to 131072 ##
SET @@global.key_buffer_size = 131072;


--echo ## Creating two new connections ##
CONNECT (test_con1,localhost,root,,);
CONNECT (test_con2,localhost,root,,);


--echo '#--------------------FN_DYNVARS_055_02-------------------------#'
###############################################################################
# Verifying initial behavior of variable by concatinating values greater than 4
###############################################################################

--echo ## Connecting with connection test_con1 ##
CONNECTION test_con1;
SELECT @@global.key_buffer_size;


--echo ## Inserting some rows in table ##
INSERT INTO t1(rollno, name) VALUES(1, 'Record_1');
INSERT INTO t1(rollno, name) VALUES(2, 'Record_2');
INSERT INTO t1(rollno, name) VALUES(1, 'Record_3');
INSERT INTO t1(rollno, name) VALUES(3, 'Record_4');
INSERT INTO t1(rollno, name) VALUES(1, 'Record_5');
INSERT INTO t1(rollno, name) VALUES(3, 'Record_6');
INSERT INTO t1(rollno, name) VALUES(4, 'Record_7');
INSERT INTO t1(rollno, name) VALUES(4, 'Record_8');
INSERT INTO t1(rollno, name) VALUES(4, 'Record_9');
INSERT INTO t1(rollno, name) VALUES(4, 'Record_10');

--echo ## Key_reads must be zero (no disk access) ##
show status like 'Key_reads';

--echo ## Switching to connection test_con2 ##
connection test_con2;

--echo ## Key_reads must be zero (no disk access) ##
show status like 'Key_reads';

--echo ## Connecting with connection test_con1 ##
CONNECTION test_con1;

--echo ## Inserting some rows in table ##
INSERT INTO t1(rollno, name) VALUES(5, 'Record_11');
INSERT INTO t1(rollno, name) VALUES(6, 'Record_12');
INSERT INTO t1(rollno, name) VALUES(5, 'Record_13');
INSERT INTO t1(rollno, name) VALUES(7, 'Record_14');
INSERT INTO t1(rollno, name) VALUES(5, 'Record_15');
INSERT INTO t1(rollno, name) VALUES(7, 'Record_16');
INSERT INTO t1(rollno, name) VALUES(8, 'Record_17');
INSERT INTO t1(rollno, name) VALUES(8, 'Record_18');
INSERT INTO t1(rollno, name) VALUES(8, 'Record_19');
INSERT INTO t1(rollno, name) VALUES(8, 'Record_20');

--echo ## Key_reads must be zero (no disk access) ##
show status like 'Key_reads';

############################################################
#    Disconnecting all connection & dropping table         #
############################################################

--echo ## Dropping table ##
DROP TABLE IF EXISTS t1;

--echo ## Disconnecting both the connections ##
DISCONNECT test_con2;
DISCONNECT test_con1;

connection default;
SET @@global.key_buffer_size= @start_value;

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