IBM i（AS400）DB2从Java检索和解压缩值

Question

I'm trying to retrieve a packed value from db2 (as400). I have no experience with DB2 and completely unaware of PACK values.

Can somebody provide me packing or unpacking algorithm.

I have already tried SELECT HEX(value) FROM..... . This is not working...

Thanx in advance.

Answer 1

Don't do anything special. DB2 internally stores some numbers as packed, but when it delivers those numbers to you, it unpacks them. select packed_numeric_column from db2_table... will work just fine.

Answer 2

select cast(myfield as numeric(18,6)) as myfield from mytable.

Answer 3

Problem solved,

We can decrypt <BLOB> type value using IBM500 Coded character set identifiers , in java.

//rsAS400.getBytes("F00001") this returns <BLOB> type value

String value = new String(rsAS400.getBytes("F00001"), "IBM500");