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###############################################################################
#                                                                             #
# Variable Name: query_cache_size                                             #
# Scope: Global                                                               #
# Access Type: Dynamic                                                        #
# Data Type: numeric                                                          #
#                                                                             #
#                                                                             #
# Creation Date: 2012-09-6                                                    #
# Author : Tanjot Singh Uppal                                                 #
#                                                                             #
#                                                                             #
# Description:Test Cases of Dynamic System Variable query_cache_size          #
#             that checks the behavior of this variable in the following ways #
#              * Value Check                                                  #
#              * Scope Check                                                  #
#              * Functionality Check                                          #
#              * Accessability Check                                          #
#                                                                             #               
# This test does not perform the crash recovery on this variable              # 
# For crash recovery test on default change please run the ibtest             #
###############################################################################

-- source include/have_innodb.inc
-- source include/not_embedded.inc
-- source include/have_innodb_16k.inc

echo '#________________________VAR_02_query_cache_size__________________#'
echo '##'
--echo '#---------------------WL6372_VAR_2_01----------------------#'
####################################################################
#   Checking default value                                         #
####################################################################
SELECT COUNT(@@GLOBAL.query_cache_size);
--echo 1 Expected

SELECT @@GLOBAL.query_cache_size;
--echo 1048576 Expected

--echo '#---------------------WL6372_VAR_2_02----------------------#'
#################################################################################
# Checking the Default value post starting the server with other value          #
#################################################################################
--echo # Restart server with query_cache_size 51200;

let $restart_file= $MYSQLTEST_VARDIR/tmp/mysqld.1.expect;
--exec echo "wait" > $restart_file
--shutdown_server 
--source include/wait_until_disconnected.inc
-- exec echo "restart:--query_cache_size=51200  " > $MYSQLTEST_VARDIR/tmp/mysqld.1.expect
-- enable_reconnect
-- source include/wait_until_connected_again.inc

SELECT @@GLOBAL.query_cache_size;
--echo 51200 Expected

SET @@GLOBAL.query_cache_size=DEFAULT;
SELECT @@GLOBAL.query_cache_size;
--echo 1048576 Expected



--echo '#---------------------WL6372_VAR_2_03----------------------#'
####################################################################
#   Checking Value can be set - Dynamic                            #
####################################################################

--error ER_GLOBAL_VARIABLE
SET @@local.query_cache_size=1;
--echo Expected error 'Global variable'

--error ER_GLOBAL_VARIABLE
SET @@session.query_cache_size=1;
--echo Expected error 'Global variable'

--disable_warnings
SET @@GLOBAL.query_cache_size=1;
--enable_warnings
SET @@GLOBAL.query_cache_size=DEFAULT;

SELECT @@GLOBAL.query_cache_size;
--echo 1048576 Expected


--echo '#---------------------WL6372_VAR_2_04----------------------#'
#################################################################
# Check if the value in GLOBAL Table matches value in variable  #
#################################################################
--disable_warnings
SELECT @@GLOBAL.query_cache_size = VARIABLE_VALUE
FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
WHERE VARIABLE_NAME='query_cache_size';
--enable_warnings
--echo 1 Expected

SELECT COUNT(@@GLOBAL.query_cache_size);
--echo 1 Expected

--disable_warnings
SELECT COUNT(VARIABLE_VALUE)
FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES 
WHERE VARIABLE_NAME='query_cache_size';
--enable_warnings
--echo 1 Expected



--echo '#---------------------WL6372_VAR_2_05----------------------#'
################################################################################
#  Checking Variable Scope                                                     #
################################################################################
SELECT @@query_cache_size = @@GLOBAL.query_cache_size;
--echo 1 Expected

--Error ER_INCORRECT_GLOBAL_LOCAL_VAR
SELECT COUNT(@@local.query_cache_size);
--echo Expected error 'Variable is a GLOBAL variable'

--Error ER_INCORRECT_GLOBAL_LOCAL_VAR
SELECT COUNT(@@SESSION.query_cache_size);
--echo Expected error 'Variable is a GLOBAL variable'

SELECT COUNT(@@GLOBAL.query_cache_size);
--echo 1 Expected

--Error ER_BAD_FIELD_ERROR
SELECT query_cache_size = @@SESSION.query_cache_size;
--echo Expected error 'Unknown column query_cache_size in field list'



--echo '#---------------------WL6372_VAR_2_06----------------------#'
###############################################################################
# Checking the /Var  directory size                                           #
###############################################################################
-- source include/vardir_size_check.inc
--echo TRUE Expected

--echo '#---------------------WL6372_VAR_2_07----------------------#'
#################################################################################
# Checking the size of query cache functionality                                #
#################################################################################
--echo # create 1 table and insert 3 rows each
--disable_warnings
DROP TABLE IF EXISTS tab1;
--enable_warnings
let $i = 3;

let $table = tab1;
--source include/create_table.inc
--source include/Load_data.inc

set @@GLOBAL.query_cache_size=DEFAULT;

let $Qcache_hits = `select variable_value from information_schema.global_status where variable_name ='Qcache_hits';`;
let $Qcache_inserts = `select variable_value from information_schema.global_status where variable_name ='Qcache_inserts';`;
let $Qcache_queries_in_cache = `select variable_value from information_schema.global_status where variable_name ='Qcache_queries_in_cache';`;
let $Qcache_not_cached = `select variable_value from information_schema.global_status where variable_name ='Qcache_not_cached';`;

select 1 from tab1 limit 1;
--echo 1 Expected
--disable_warnings
select variable_value from information_schema.global_status where variable_name ='Qcache_hits';
--echo 0 Expected
select variable_value from information_schema.global_status where variable_name ='Qcache_inserts';
--echo 0 Expected
select variable_value from information_schema.global_status where variable_name ='Qcache_queries_in_cache';
--echo 0 Expected
select variable_value from information_schema.global_status where variable_name ='Qcache_not_cached';
--enable_warnings
--echo 17 Expected

select 1 from tab1 limit 1;
--echo 1 Expected
--disable_warnings
select variable_value from information_schema.global_status where variable_name ='Qcache_hits';
--echo 0 Expected
select variable_value from information_schema.global_status where variable_name ='Qcache_inserts';
--echo 0 Expected
select variable_value from information_schema.global_status where variable_name ='Qcache_queries_in_cache';
--echo 0 Expected
select variable_value from information_schema.global_status where variable_name ='Qcache_not_cached';
--enable_warnings
--echo 22 Expected

select 1 from tab1 limit 2;
--echo 1 Expected
--disable_warnings
select variable_value from information_schema.global_status where variable_name ='Qcache_hits';
--echo 0 Expected
select variable_value from information_schema.global_status where variable_name ='Qcache_inserts';
--echo 0 Expected
select variable_value from information_schema.global_status where variable_name ='Qcache_queries_in_cache';
--echo 0 Expected
select variable_value from information_schema.global_status where variable_name ='Qcache_not_cached';
--enable_warnings
--echo 27 Expected

--echo # Restart server with query_cache_type ON

let $restart_file= $MYSQLTEST_VARDIR/tmp/mysqld.1.expect;
--exec echo "wait" > $restart_file
--shutdown_server 
--source include/wait_until_disconnected.inc
-- exec echo "restart:--query_cache_type=1  " > $MYSQLTEST_VARDIR/tmp/mysqld.1.expect
-- enable_reconnect
-- source include/wait_until_connected_again.inc

--disable_warnings
let $Qcache_hits = `select variable_value from information_schema.global_status where variable_name ='Qcache_hits';`;
let $Qcache_inserts = `select variable_value from information_schema.global_status where variable_name ='Qcache_inserts';`;
let $Qcache_queries_in_cache = `select variable_value from information_schema.global_status where variable_name ='Qcache_queries_in_cache';`;
let $Qcache_not_cached = `select variable_value from information_schema.global_status where variable_name ='Qcache_not_cached';`;
--enable_warnings

select 1 from tab1 limit 1;
--echo 1 Expected

--disable_warnings
select variable_value from information_schema.global_status where variable_name ='Qcache_hits';
--echo 0 Expected

select variable_value from information_schema.global_status where variable_name ='Qcache_inserts';
--echo 1 Expected

select variable_value from information_schema.global_status where variable_name ='Qcache_queries_in_cache';
--echo 1 Expected

select variable_value from information_schema.global_status where variable_name ='Qcache_not_cached';
--echo 8 Expected

select 1 from tab1 limit 2;
--echo 1 Expected
select variable_value from information_schema.global_status where variable_name ='Qcache_hits';
--echo 0 Expected

select variable_value from information_schema.global_status where variable_name ='Qcache_inserts';
--echo 2 Expected

select variable_value from information_schema.global_status where variable_name ='Qcache_queries_in_cache';
--echo 2 Expected

select variable_value from information_schema.global_status where variable_name ='Qcache_not_cached';
--echo 12 Expected

select 1 from tab1 limit 1;
--echo 1 Expected
select variable_value from information_schema.global_status where variable_name ='Qcache_hits';
--echo 1 Expected

select variable_value from information_schema.global_status where variable_name ='Qcache_inserts';
--echo 2 Expected

select variable_value from information_schema.global_status where variable_name ='Qcache_queries_in_cache';
--echo 2 Expected

select variable_value from information_schema.global_status where variable_name ='Qcache_not_cached';
--echo 16 Expected

--enable_warnings

--echo # opening another client session
connect (con1,localhost,root,,);

--disable_warnings
select variable_value from information_schema.global_status where variable_name ='Qcache_not_cached';
--enable_warnings
--echo 17 Expected

disconnect con1;

--echo #cleanup
connection default;

DROP TABLE IF EXISTS tab1;

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