CREATE TABLE valid_values (value varchar(255)) ENGINE=myisam;
INSERT INTO valid_values VALUES(1);
INSERT INTO valid_values VALUES(0);
INSERT INTO valid_values VALUES(222333);
CREATE TABLE invalid_values (value varchar(255)) ENGINE=myisam;
INSERT INTO invalid_values VALUES('\'aaa\'');
INSERT INTO invalid_values VALUES('\'bbb\'');
SET @@global.rocksdb_compaction_readahead_size = -1;
Warnings:
Warning	1292	Truncated incorrect rocksdb_compaction_readahead_... value: '-1'
SELECT @@global.rocksdb_compaction_readahead_size;
@@global.rocksdb_compaction_readahead_size
0
SET @start_global_value = @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE;
SELECT @start_global_value;
@start_global_value
0
'# Setting to valid values in global scope#'
"Trying to set variable @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE to 1"
SET @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE   = 1;
SELECT @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE;
@@global.ROCKSDB_COMPACTION_READAHEAD_SIZE
1
"Setting the global scope variable back to default"
SET @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE = DEFAULT;
SELECT @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE;
@@global.ROCKSDB_COMPACTION_READAHEAD_SIZE
0
"Trying to set variable @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE to 0"
SET @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE   = 0;
SELECT @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE;
@@global.ROCKSDB_COMPACTION_READAHEAD_SIZE
0
"Setting the global scope variable back to default"
SET @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE = DEFAULT;
SELECT @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE;
@@global.ROCKSDB_COMPACTION_READAHEAD_SIZE
0
"Trying to set variable @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE to 222333"
SET @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE   = 222333;
SELECT @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE;
@@global.ROCKSDB_COMPACTION_READAHEAD_SIZE
222333
"Setting the global scope variable back to default"
SET @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE = DEFAULT;
SELECT @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE;
@@global.ROCKSDB_COMPACTION_READAHEAD_SIZE
0
"Trying to set variable @@session.ROCKSDB_COMPACTION_READAHEAD_SIZE to 444. It should fail because it is not session."
SET @@session.ROCKSDB_COMPACTION_READAHEAD_SIZE   = 444;
ERROR HY000: Variable 'rocksdb_compaction_readahead_size' is a GLOBAL variable and should be set with SET GLOBAL
'# Testing with invalid values in global scope #'
"Trying to set variable @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE to 'aaa'"
SET @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE   = 'aaa';
Got one of the listed errors
SELECT @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE;
@@global.ROCKSDB_COMPACTION_READAHEAD_SIZE
0
"Trying to set variable @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE to 'bbb'"
SET @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE   = 'bbb';
Got one of the listed errors
SELECT @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE;
@@global.ROCKSDB_COMPACTION_READAHEAD_SIZE
0
SET @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE = @start_global_value;
SELECT @@global.ROCKSDB_COMPACTION_READAHEAD_SIZE;
@@global.ROCKSDB_COMPACTION_READAHEAD_SIZE
0
DROP TABLE valid_values;
DROP TABLE invalid_values;