SET @mroonga_default_tokenizer_backup = @@mroonga_default_tokenizer;
SET GLOBAL mroonga_default_tokenizer = "TokenBigramSplitAlpha";
SHOW GLOBAL VARIABLES LIKE 'mroonga_default_tokenizer';
Variable_name	Value
mroonga_default_tokenizer	TokenBigramSplitAlpha
SET GLOBAL mroonga_default_tokenizer = @mroonga_default_tokenizer_backup;
