On Tue, 12 Jun 2012 12:59:13 -0700, Charles Mills wrote: > >" A round-trip conversion works only in a two-tier homogenous environment >where the data makes the complete round trip. For example, if you pass data >from DB2 for Linux, UNIX, and Windows to DB2 for z/OS and then back to DB2 >for Linux, UNIX, and Windows with a round-trip conversion, no data is lost. >The data was converted back to its original format. However, if you have a >more complicated environment, a round-trip conversion does not necessarily >preserve data integrity. For example, if you pass data from DB2 for z/OS to >DB2 for Linux, UNIX, and Windows and then to Linux on a Java client, two >conversions have potentially occurred. Because the data was not converted >back to its original format before the second conversion, data might have >been lost even if round-trip conversions are used. > ??? Errr...
The composition of two (or more) bijective function is a bijective function. This can't violate data integrity. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
