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#
# Show the global value;
#
SELECT @@global.avoid_temporal_upgrade;
SHOW GLOBAL VARIABLES LIKE 'avoid_temporal_upgrade';
--disable_warnings
SELECT * FROM information_schema.global_variables WHERE variable_name='avoid_temporal_upgrade';
--enable_warnings

--echo #It is not a session variable.
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
SELECT @@session.avoid_temporal_upgrade;
SHOW SESSION VARIABLES LIKE 'avoid_temporal_upgrade';
--disable_warnings
SELECT * FROM information_schema.session_variables WHERE variable_name='avoid_temporal_upgrade';
--enable_warnings
--error ER_GLOBAL_VARIABLE
SET SESSION avoid_temporal_upgrade= ON;

--echo #Test setting the variable to various values.

--echo #Boolean values.
SET GLOBAL avoid_temporal_upgrade= ON;
SELECT @@global.avoid_temporal_upgrade;

SET GLOBAL avoid_temporal_upgrade= OFF;
SELECT @@global.avoid_temporal_upgrade;

SET GLOBAL avoid_temporal_upgrade= 1;
SELECT @@global.avoid_temporal_upgrade;

SET GLOBAL avoid_temporal_upgrade= 0;
SELECT @@global.avoid_temporal_upgrade;

--echo #Test for DEFAULT value.
SET GLOBAL avoid_temporal_upgrade= DEFAULT;
SELECT @@global.avoid_temporal_upgrade;

--echo #Test for invalid value.
--error ER_WRONG_VALUE_FOR_VAR
SET GLOBAL avoid_temporal_upgrade= 2;

--echo #Test for invalid statement for setting the 
--echo #global variable.
--error ER_GLOBAL_VARIABLE
SET avoid_temporal_upgrade= 1;

--echo #Fetches the current global value for the variable.
SELECT @@avoid_temporal_upgrade;