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############## mysql-test/t/innodb_rollback_segments_basic.test ###############
# #
# Variable Name: innodb_rollback_segments #
# Scope: Global #
# Access Type: Static #
# Data Type: numeric #
# #
# #
# Creation Date: 2011-07-05 #
# Author: Sunny Bains #
# Modified: Kevin Lewis 2015-12-15 #
# innodb_undo_logs -> innodb_rollback_segments #
# #
# Description: Read-Write config global variable innodb_rollback_segments #
# * Value check #
# * Scope check #
# #
###############################################################################
SET @start_global_value = @@global.innodb_rollback_segments;
SELECT @start_global_value;
--echo #
--echo # Default value is 128 and exists as global only
--echo #
SELECT @@GLOBAL.innodb_rollback_segments;
SELECT @@GLOBAL.innodb_rollback_segments >=0;
SELECT @@GLOBAL.innodb_rollback_segments <=128;
SELECT COUNT(@@GLOBAL.innodb_rollback_segments);
SELECT COUNT(@@innodb_rollback_segments);
SHOW GLOBAL variables LIKE 'innodb_rollback_segments';
SHOW SESSION variables LIKE 'innodb_rollback_segments';
--echo # Expected below: error 'Variable is a GLOBAL variable'
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
SELECT @@SESSION.innodb_rollback_segments;
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
SELECT COUNT(@@SESSION.innodb_rollback_segments);
--Error ER_BAD_FIELD_ERROR
SELECT innodb_rollback_segments;
--Error ER_INCORRECT_GLOBAL_LOCAL_VAR
SELECT @@LOCAL.innodb_rollback_segments;
--Error ER_INCORRECT_GLOBAL_LOCAL_VAR
SELECT COUNT(@@LOCAL.innodb_rollback_segments);
--Error ER_BAD_FIELD_ERROR
SELECT innodb_rollback_segments;
--echo #
--echo # Check if accessing variable with and without GLOBAL point to same variable
--echo #
SELECT @@innodb_rollback_segments = @@GLOBAL.innodb_rollback_segments;
--echo #
--echo # Check if the value in GLOBAL table matches value in performance_schema
--echo #
--disable_warnings
SELECT * FROM performance_schema.global_variables
WHERE variable_name='innodb_rollback_segments';
SELECT * FROM performance_schema.session_variables
WHERE variable_name='innodb_rollback_segments';
--enable_warnings
--echo #
--echo # Check if value can be set
--echo #
SET GLOBAL innodb_rollback_segments=100;
SELECT @@global.innodb_rollback_segments;
--disable_warnings
SELECT * FROM performance_schema.global_variables
WHERE variable_name='innodb_rollback_segments';
SELECT * FROM performance_schema.session_variables
WHERE variable_name='innodb_rollback_segments';
--enable_warnings
--error ER_GLOBAL_VARIABLE
SET SESSION innodb_rollback_segments=101;
--echo #
--echo # Valid values are 1 - 128
--echo #
--error ER_WRONG_TYPE_FOR_VAR
SET GLOBAL innodb_rollback_segments=1.1;
--error ER_WRONG_TYPE_FOR_VAR
SET GLOBAL innodb_rollback_segments=1e1;
--error ER_WRONG_TYPE_FOR_VAR
SET GLOBAL innodb_rollback_segments="foo";
SET GLOBAL innodb_rollback_segments=-7;
SELECT @@global.innodb_rollback_segments;
SET GLOBAL innodb_rollback_segments=0;
SELECT @@global.innodb_rollback_segments;
SET GLOBAL innodb_rollback_segments=50;
SELECT @@global.innodb_rollback_segments;
SET GLOBAL innodb_rollback_segments=129;
SELECT @@global.innodb_rollback_segments;
--disable_warnings
SELECT * FROM performance_schema.global_variables
WHERE variable_name='innodb_rollback_segments';
--enable_warnings
--echo #
--echo # cleanup
--echo #
SET @@global.innodb_rollback_segments = @start_global_value;
SELECT @@global.innodb_rollback_segments;
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