HP 3000 Manuals HP 3000 Manuals
DBChange Plus Enhancements by RJ Diepeveen Commercial Systems Division MPE/iX Release 4.0 includes significant enhancements to TurboIMAGE/XL. Several of these enhancements affect the TurboIMAGE/XL utility programs and related maintenance products. DBChange Plus is enhanced to keep pace with TurboIMAGE/XL. The areas of enhancement relate to the following TurboIMAGE/XL enhancements: * Third Party Indexing Interface * IEEE Floating Point Real Numbers * Four (4) Gigabyte Dataset Size These new features are described in the articles entitled "TurboIMAGE/XL Enhancements" and "TurboIMAGE/XL Enhancement Details" included in this Communicator. THIRD PARTY INDEXING INTERFACE SUPPORT The Third Party Indexing (TPI) Interface is a seamless integration of TurboIMAGE/XL with the OMNIDEX from Dynamic Information Systems Corporation (DISC) or SUPERDEX from Bradmark Technologies Inc. Each of these products has file requirements that make up the logical database. DBChange Plus is enhanced to work with the logical database. For the variety of functions available within DBChange Plus such as COPY, RESTRUCTURE, REPACK or ERASE, the database files and indexes files are handled as one. Each of the products, SUPERDEX or OMNIDEX, will have different requirements due to the proprietary nature of their products. Specific details for these functions should be obtained from the respective vendors. IEEE FLOATING POINT REAL NUMBERS TurboIMAGE/XL now supports IEEE Floating Point Real Numbers with data types E2 and E4 for single and double precision. DBChange Plus now supports this data type when adding and changing items in databases. It should be noted that although the data type is new, IEEE Real Number data in TurboIMAGE/XL items is not new. Many users have chosen to store the IEEE Real values in the R (HP3000 Real Number) data type. The only limitation in this implementation was that HP supplied tools, such as Query, were unable to correctly display or manipulate this data. That task was always left to the user programs that understood the data as being IEEE Real Numbers. DBChange Plus is enhanced to perform conversions of data from one type to another, for example from I2 to E2, or from R2 to E2. DBChange Plus can also do data type changing without data conversion. So, for those R2 data types with single precision IEEE Real data being stored in them, DBChange Plus can change the data type from R2 to E2 without performing the data conversion. These enhancements to DBChange Plus allows you to more quickly take advantage of these new data types in your applications. FOUR (4) GIGABYTE DATASET SIZES File sizes can now reach a maximum size of four (4) gigabytes, up from two (2) gigabytes in the previous release. TurboIMAGE/XL is enhanced to handle datasets this size, and DBChange Plus is enhanced to make them that large. As DBChange Plus processes a dataset capacity change, it calculates the required new file size and, if less than or equal to 4GB, process the request with the file system. A common reason for not having the request satisfied would be an out of disc space condition. This enhancement allows your databases to grow with your business. CONCLUSION As TurboIMAGE/XL continues to be enhanced so will the supporting products from Hewlett-Packard. DBChange Plus is keeping pace with TurboIMAGE/XL.