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--source include/have_innodb.inc
SELECT @@GLOBAL.innodb_doublewrite;
SET @@GLOBAL.innodb_doublewrite=0;
SELECT @@GLOBAL.innodb_doublewrite;
SET @@GLOBAL.innodb_doublewrite=2;
--error ER_WRONG_VALUE_FOR_VAR
SET @@GLOBAL.innodb_doublewrite=3;
SELECT @@GLOBAL.innodb_doublewrite;
SET @@GLOBAL.innodb_doublewrite=1;
SELECT @@GLOBAL.innodb_doublewrite;
SELECT COUNT(VARIABLE_VALUE)
FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
WHERE VARIABLE_NAME='innodb_doublewrite';
--echo '#---------------------BS_STVARS_026_04----------------------#'
################################################################################
# Check if accessing variable with and without GLOBAL point to same variable #
################################################################################
SELECT @@innodb_doublewrite = @@GLOBAL.innodb_doublewrite;
--echo 1 Expected
--echo '#---------------------BS_STVARS_026_05----------------------#'
################################################################################
# Check if innodb_doublewrite can be accessed with and without @@ sign #
################################################################################
SELECT COUNT(@@innodb_doublewrite);
--echo 1 Expected
--Error ER_INCORRECT_GLOBAL_LOCAL_VAR
SELECT COUNT(@@local.innodb_doublewrite);
--echo Expected error 'Variable is a GLOBAL variable'
--Error ER_INCORRECT_GLOBAL_LOCAL_VAR
SELECT COUNT(@@SESSION.innodb_doublewrite);
--echo Expected error 'Variable is a GLOBAL variable'
SELECT COUNT(@@GLOBAL.innodb_doublewrite);
--echo 1 Expected
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
SELECT @@innodb_doublewrite = @@SESSION.innodb_doublewrite;
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