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#################################################################### # Displaying default value # #################################################################### SELECT @@GLOBAL.metadata_locks_hash_instances; @@GLOBAL.metadata_locks_hash_instances 8 Warnings: Warning 1287 '@@metadata_locks_hash_instances' is deprecated and will be removed in a future release. #################################################################### # Check that value cannot be set (this variable is settable only # # at start-up). # #################################################################### SET @@GLOBAL.metadata_locks_hash_instances=1; ERROR HY000: Variable 'metadata_locks_hash_instances' is a read only variable SELECT @@GLOBAL.metadata_locks_hash_instances; @@GLOBAL.metadata_locks_hash_instances 8 Warnings: Warning 1287 '@@metadata_locks_hash_instances' is deprecated and will be removed in a future release. ################################################################# # Check if the value in GLOBAL Table matches value in variable # ################################################################# SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='metadata_locks_hash_instances' into @tmp; SELECT @@GLOBAL.metadata_locks_hash_instances = @tmp; @@GLOBAL.metadata_locks_hash_instances = @tmp 1 Warnings: Warning 1287 '@@metadata_locks_hash_instances' is deprecated and will be removed in a future release. SELECT @@GLOBAL.metadata_locks_hash_instances; @@GLOBAL.metadata_locks_hash_instances 8 Warnings: Warning 1287 '@@metadata_locks_hash_instances' is deprecated and will be removed in a future release. SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='metadata_locks_hash_instances'; VARIABLE_VALUE 8 ###################################################################### # Check if accessing variable with and without GLOBAL point to same # # variable # ###################################################################### SELECT @@metadata_locks_hash_instances = @@GLOBAL.metadata_locks_hash_instances; @@metadata_locks_hash_instances = @@GLOBAL.metadata_locks_hash_instances 1 Warnings: Warning 1287 '@@metadata_locks_hash_instances' is deprecated and will be removed in a future release. Warning 1287 '@@metadata_locks_hash_instances' is deprecated and will be removed in a future release. ###################################################################### # Check if variable has only the GLOBAL scope # ###################################################################### SELECT @@metadata_locks_hash_instances; @@metadata_locks_hash_instances 8 Warnings: Warning 1287 '@@metadata_locks_hash_instances' is deprecated and will be removed in a future release. SELECT @@GLOBAL.metadata_locks_hash_instances; @@GLOBAL.metadata_locks_hash_instances 8 Warnings: Warning 1287 '@@metadata_locks_hash_instances' is deprecated and will be removed in a future release. SELECT @@local.metadata_locks_hash_instances; ERROR HY000: Variable 'metadata_locks_hash_instances' is a GLOBAL variable SELECT @@SESSION.metadata_locks_hash_instances; ERROR HY000: Variable 'metadata_locks_hash_instances' is a GLOBAL variable