TurboIMAGE/XL Database Management System Reference Manual (30391-90012)
Table Of Contents
- 1 Introduction
- 2 Database Structure and Protection
- 3 Defining a Database
- 4 Using the Database
- 5 TurboIMAGE/XL Library Procedures
- Using TurboIMAGE/XL Intrinsics
- DBBEGIN
- DBCLOSE
- DBCONTROL
- DBDELETE
- DBEND
- DBERROR
- DBEXPLAIN
- DBFIND
- DBGET
- DBINFO
- INTRINSIC NUMBER 402
- Syntax
- Parameters
- Discussion
- Mode 101: Item Number
- Mode 102: Item Name
- Mode 103: Items in Database
- Mode 104: Items in Data Set
- Mode 113: BTREEMODE1 and Wildcard Character
- Mode 201: Set Number
- Mode 202: Set Name
- Mode 203: Sets in Database
- Mode 204: Sets with Item
- Mode 205: Set Capacity
- Mode 206: Number of Data Set Chunks
- Mode 207: Size of Data Set Chunks
- Mode 208: Primary and Actual Capacity
- Mode 209: B-Tree Attachment
- Mode 301: Paths
- Mode 302: Key or Search Item
- Mode 401: Logging
- Mode 402: ILR
- Mode 403: Dynamic Roll-Back
- Mode 404: Logging Subsystem Information
- Mode 406: Database Information
- Mode 501: Subsystem Access
- Mode 502: Critical Item Update
- Modes 8nn: Third-Party Indexing
- Mode 901: Language
- DBLOCK
- DBMEMO
- DBOPEN
- DBPUT
- DBUNLOCK
- DBUPDATE
- DBXBEGIN
- DBXEND
- DBXUNDO
- 6 Host Language Access
- Model Program
- ORDERS Database Model Program
- Main Body of Program
- Opening the Database
- Retrieving All the Records on a Chain (with Item Level Locking)
- Retrieving a Data Entry Using a Record Number
- Retrieving Master Data Using a Key Value
- Retrieving Data Serially (with Set Level Locking)
- Adding an Entry
- Updating an Entry
- Deleting an Entry
- Rewinding a Data Set
- Obtaining Database Information
- Obtaining Error Messages and Explanations
- Closing the Database
- C
- COBOL II
- Defining Data Types, Variables, and Intrinsics
- Main Body of Program
- Opening the Database
- Retrieving All the Records on a Chain (with Item Level Locking)
- Retrieving a Data Entry Using a Record Number
- Retrieving Master Data Using a Key Value
- Retrieving Data Serially (with Set Level Locking)
- Adding an Entry
- Updating an Entry
- Deleting an Entry
- Rewinding a Data Set
- Obtaining Database Information
- Obtaining Error Messages and Explanations
- Closing the Database
- FORTRAN 77
- Pascal
- RPG
- 7 Logging and Recovery
- Database Utilities Used in Logging and Recovery
- Recovery Options
- Logical Transactions
- Dynamic Roll-Back Recovery
- Intrinsic Level Recovery
- Logging Preparation
- Step 1--Checking MPE/iX Logging Configuration
- Step 2--Acquiring Logging Capability
- Step 3--Logging to Tape or Disk
- Step 4--Building a Log File for Logging to Disk
- Step 5--Creating the Log Identifier
- Step 6--Setting the Log Identifier
- Step 7--Setting Flags for the Database Backup Copy
- Step 8--Making a Database Backup Copy
- TurboSTORE/iX 7x24 True-Online Backup
- Logging Status
- Logging Maintenance
- Roll-Forward Recovery
- Roll-Back Recovery
- DBRECOV Commands Used with Roll-Forward and Roll-Back Recovery
- Recovery Tables
- Post-Recovery Options
- The Mirror Database
- 8 Using the Database Utilities
- Restructuring the Database with TurboIMAGE/XL Utilities
- Summary of Utility Routines
- Utility Program Operation
- DBLOAD
- DBRECOV
- >CONTROL
- >EXIT
- >FILE
- >RECOVER
- >ROLLBACK
- >RUN
- DBRESTOR
- DBSTORE
- DBUNLOAD
- DBUTIL
- >>ACTIVATE
- >>ADDINDEX
- >>CREATE
- >>DEACTIVATE
- >>DETACH
- >>DISABLE
- >>DROPINDEX
- >>ENABLE
- >>ERASE
- >>EXIT
- >>HELP
- >>MOVE
- >>PURGE
- >>REBUILDINDEX
- >>REDO
- >>RELEASE
- >>SECURE
- >>SET
- >>SHOW
- Syntax
- Parameters
- Example (Show Users)
- Example Discussion
- Example (Show All)
- Example Discussion
- Example (Show Capacity)
- Format of Show Device List
- Example (Show Device)
- Format of Show Indices
- Example (Show Indices)
- Format of Show Locks List
- Example 1 (Show Locks)
- Example 1 Discussion
- Example 2 (Show Locks)
- Example 2 Discussion
- >>VERIFY
- 9 Using a Remote Database
- 10 Internal Structures and Techniques
- 11 B-Tree Indices
- A Error Messages
- B Results of Multiple Access
- C Database Design Considerations
- D Multiple Calls to DBLOCK
- E TurboIMAGE/XL Log Record Formats
- F MPE/iX Log Record Formats
- G Recovery and Logging Quick Reference
- H TurboIMAGE/XL versus TurboIMAGE/V
Appendix E 659
TurboIMAGE/XL Log Record Formats
E TurboIMAGE/XL Log Record Formats
This appendix shows the TurboIMAGE/XL log record formats for the DBBEGIN, DBCLOSE,
DBDELETE, DBEND, DBMEMO, DBOPEN, DBPUT, DBUPDATE, DBXBEGIN, DBXEND, and
DBXUNDO intrinsics. Note that the recovery flag will always be zero in the log file records.
This flag is used during recovery if user recovery files are created.
NOTE
All TurboIMAGE/XL records are contained within MPE/iX "WRITELOG"
records. Consequently, all information contained in the header portion of each
WRITELOG record is available, in addition to the information provided by
TurboIMAGE/XL.
DBBEGIN
HALFWORD(0-8) - MPE WRITELOG RECORD
HALFWORD(9) - TURBOIMAGE/XL LOG RECORD LENGTH
HALFWORD(10) - DBBEGIN LOG RECORD CODE ("BE")
HALFWORD(11) - DATA SEGMENT NUMBER
HALFWORD(12) - RECOVERY FLAG ("NO"-FAILED,"OK"-RECOVERED)
OR MULTIPLE DATABASE TRANSACTION SEQUENCE ID
HALFWORD(13) - TRANSACTION NUMBER (1 WORD)
HALFWORD(15) - LENGTH OF USER BUFFER
HALFWORD(16) - START OF USER BUFFER
DBBEGIN Mode 4 (MDBXBEGIN)
HALFWORD(0-8) - MPE WRITELOG RECORD
HALFWORD(9) - TURBOIMAGE/XL LOG RECORD LENGTH
HALFWORD(10) - MDBXBEGIN LOG RECORD CODE ("TB")
HALFWORD(11) - NOT USED
HALFWORD(12) - SEQUENCE ID
BITS 0-3 = RESERVED
BITS 4-9 = SEQUENCE NUMBER
BITS 10-15 = TOTAL NUMBER OF DBBEGIN/DBEND
LOG RECORDS IN THE SEQUENCE
HALFWORD(13-14) - TRANSACTION ID
HALFWORD(15) - LENGTH OF USER BUFFER
HALFWORD(16) - START OF USER BUFFER
HALFWORD(17) - NUMBER OF BASE IDs INVOLVED IN MDBX
HALFWORD(18) - DATA SEGMENT NUMBER OF FIRST BASE ID
HALFWORD(19-20) - TRANSACTION NUMBER FOR 1ST BASE ID
HALFWORD(21) - DATA SEGMENT NUMBER OF SECOND BASE ID
HALFWORD(22-23) - TRANSACTION NUMBER FOR 2ND BASE ID