CREATE TABLE valid_values (value varchar(255)) ENGINE=myisam;
INSERT INTO valid_values VALUES(1);
INSERT INTO valid_values VALUES(64);
CREATE TABLE invalid_values (value varchar(255)) ENGINE=myisam;
INSERT INTO invalid_values VALUES('\'abc\'');
SET @start_global_value = @@global.ROCKSDB_MAX_BACKGROUND_JOBS;
SELECT @start_global_value;
@start_global_value
2
'# Setting to valid values in global scope#'
"Trying to set variable @@global.ROCKSDB_MAX_BACKGROUND_JOBS to 1"
SET @@global.ROCKSDB_MAX_BACKGROUND_JOBS   = 1;
SELECT @@global.ROCKSDB_MAX_BACKGROUND_JOBS;
@@global.ROCKSDB_MAX_BACKGROUND_JOBS
1
"Setting the global scope variable back to default"
SET @@global.ROCKSDB_MAX_BACKGROUND_JOBS = DEFAULT;
SELECT @@global.ROCKSDB_MAX_BACKGROUND_JOBS;
@@global.ROCKSDB_MAX_BACKGROUND_JOBS
2
"Trying to set variable @@global.ROCKSDB_MAX_BACKGROUND_JOBS to 64"
SET @@global.ROCKSDB_MAX_BACKGROUND_JOBS   = 64;
SELECT @@global.ROCKSDB_MAX_BACKGROUND_JOBS;
@@global.ROCKSDB_MAX_BACKGROUND_JOBS
64
"Setting the global scope variable back to default"
SET @@global.ROCKSDB_MAX_BACKGROUND_JOBS = DEFAULT;
SELECT @@global.ROCKSDB_MAX_BACKGROUND_JOBS;
@@global.ROCKSDB_MAX_BACKGROUND_JOBS
2
"Trying to set variable @@session.ROCKSDB_MAX_BACKGROUND_JOBS to 444. It should fail because it is not session."
SET @@session.ROCKSDB_MAX_BACKGROUND_JOBS   = 444;
ERROR HY000: Variable 'rocksdb_max_background_jobs' is a GLOBAL variable and should be set with SET GLOBAL
'# Testing with invalid values in global scope #'
"Trying to set variable @@global.ROCKSDB_MAX_BACKGROUND_JOBS to 'abc'"
SET @@global.ROCKSDB_MAX_BACKGROUND_JOBS   = 'abc';
Got one of the listed errors
SELECT @@global.ROCKSDB_MAX_BACKGROUND_JOBS;
@@global.ROCKSDB_MAX_BACKGROUND_JOBS
2
SET @@global.ROCKSDB_MAX_BACKGROUND_JOBS = @start_global_value;
SELECT @@global.ROCKSDB_MAX_BACKGROUND_JOBS;
@@global.ROCKSDB_MAX_BACKGROUND_JOBS
2
DROP TABLE valid_values;
DROP TABLE invalid_values;