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SET @start_value = @@global.slow_query_log_file;
'#---------------------FN_DYNVARS_004_01-------------------------#'
SET @@global.slow_query_log_file = DEFAULT;
SELECT @@global.slow_query_log_file;
@@global.slow_query_log_file
mysqld-slow.log
'#--------------------FN_DYNVARS_004_02------------------------#'
SET @@global.slow_query_log_file = mytest.log;
SET @@global.slow_query_log_file = 12;
ERROR 42000: Incorrect argument type to variable 'slow_query_log_file'
'#----------------------FN_DYNVARS_004_03------------------------#'
SELECT @@global.slow_query_log_file = VARIABLE_VALUE
FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
WHERE VARIABLE_NAME='slow_query_log_file';
@@global.slow_query_log_file = VARIABLE_VALUE
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SET @@global.slow_query_log_file= @start_value;
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