HP 3000 Manuals

Ch 1. Introduction [ DBChange Plus Technical Addendum for MPE/iX Release 4.0 ] MPE/iX 5.0 Documentation


DBChange Plus Technical Addendum for MPE/iX Release 4.0

Chapter 1  Introduction 

You can store real (floating-point) numbers in MPE/iX using one of two
formats:  IEEE or HP 3000.  Until now, only an R data type was available
for you to store just your TurboIMAGE HP 3000 reals.  Some users may have
stored their IEEE reals using either the K or R data type.  An E data
type is now available to distinguish the two formats available on MPE/iX
and is especially important for users who take advantage of the math
coprocessor.  Refer to the TurboIMAGE/XL Database Management System 
Reference Manual for information on available data types.

You can use DBChange Plus to change your TurboIMAGE/XL databases to
include data items of type E. You can add new data items, and you can
change existing items.  If you change existing items to type E, any
stored data is converted to IEEE data format unless you indicate that it
already is in IEEE format.  You do this by specifying type E with a
special no-conversion option, which is provided specifically for this
purpose.


CAUTION Before installing this version of DBChange Plus, be sure to apply any changes to your database already stored in an existing change file. Change files created by an earlier version of DBChange Plus cannot be used with this version, and you will have to reenter the changes if they are not applied. Of course, you can always purge the old version change file when you use the BASE command.


MPE/iX 5.0 Documentation