TurboIMAGE/XL Database Management System Reference Manual MPE/iX V6.5 (30391-90011)
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What's New in this Edition
TurboIMAGE/XL version C.07.04 or later includes the following enhancements:
Jumbo Data Sets
By using the JUMBO option of $CONTROL, data sets can be greater than 4 GBytes.
B-Tree Indices
Provides the capability for wildcard and range searches. A new chapter 11 was added on
this topic.
Dynamic Roll-Back of Multiple Database Transactions
This enhancement is an extension of the dynamic roll-back (DBX) feature to include
multiple databases.
Dynamic Master Data Set Expansion
Dynamic master data set expansion allows a master data set to be expanded dynamically
(up to a new maximum capacity specified in the root file) during DBPUT when the data set
space is exhausted. To facilitate the dynamic master data set expansion enhancement,
DBSCHEMA, DBUTIL, and some of the TurboIMAGE/XL intrinsics are enhanced.
Support for TurboSTORE/iX 7x24 True-On-line Backup in
DBRECOV
TurboSTORE/iX 7x24 True-On-line Backup can be used to backup the database even when
open if the option ONLINE=START or ONLINE=END is used. DBRECOV will recover such a
database using logfiles.
Native-mode Utilities
DBUTIL and DBSCHEMA are now native-mode utility programs.
New Modes for DBINFO and DBFIND
DBINFO, DBFIND, and DBCONTROL have additional modes for handling B-Tree index files
and master data set expansion.
New DBUTIL Commands and Options
These new DBUTIL commands are added: DETACH, REDO, DO, LISTREDO, ADDINDEX,
DROPINDEX, and REBUILDINDEX. A new INDEXED option is added for the SHOW command.
Enhanced Database Integrity
The DBPUT and DBUPDATE intrinsics check the integrity of neighboring entries to detect
possible data corruption before inserting into a chain.
Scalability
TurboIMAGE/XL is enhanced to increase the concurrency of modification intrinsics,
DBPUT, DBDELETE, and DBUPDATE (Critical Item Update feature ON).