Up until DB2 10, all DB2 data was retrieved using some form of indexing or scanning. With DB2 Version 10, a new access method called hashing is available. Of course, referring to hashing as “new” is somewhat disingenuous because it is an old, time-tested data processing technique. Indeed, IMS databases are founded upon hashing technology.A hash, or hash function, is an algorithm that converts a defined set of data elements into a small number, usually...
