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 G 679
Recovery and Logging Quick Reference
Sample Job Streams
Figure G-5. Sample Job Stream for Backup with Database Open for Access
:JOB MGR.DATAMGT
:FILE ORDERBK2;DEV=TAPE
Mount tape.
:STORE ORDERS;*ORDERBK2;ONLINE=START
Store database while it is open for
access.
:EOJ
Assume that you will start a new log
cycle after ORDER999.
The next example in Figure G-6. uses roll-forward recovery and TurboSTORE/iX 7x24
True-Online Backup (with ONLINE=START or ONLINE=END option). If all recommended
procedures have been followed, the database backup copy will have flags set for enabling
recovery and disabling access, so the step to set these flags would be unnecessary. If this
process is being done interactively, the following command in DBUTIL will show if the flags
for recovery and access are correctly set:
>>SHOW
database name
FLAGS
Figure G-6. Sample Job Stream for Roll-Forward Recovery
:JOB MGR.DATAMGT
:FILE ORDERBAD;DEV=TAPE
Current damaged database on the system
needing recovery.
:STORE ORDERS;*ORDERBAD;ONLINE=START
Store damaged database; optional step.
:RUN DBUTIL.PUB.SYS
PURGE ORDERS
Purge the current database.
EXIT
:FILE ORDERBK2;DEV=TAPE
Mount the backup tape.
:RESTORE *ORDERBK2;ORDERS
Restore the backup copy of the database
for recovery.
:RUN DBUTIL.PUB.SYS
DISABLE ORDERS FOR ACCESS
Set the flags in the database.
ENABLE ORDERS FOR RECOVERY
ENABLE ORDERS FOR MUSTRECOVER
EXIT
:RUN DBRECOV.PUB.SYS
Use roll-forward recovery on
RECOVER ORDERS
database ORDERS.
FILE PART1,SYS/P1D1.MKTG,0,3
Use the FILE command to route log
records
FILE PART2,SYS/P1D1.MKTG,0,3
to individual user log files.
FILE PART3,SYS/P1D1.MKTG,0,3
RUN
EXIT
:LOG ORDERLOG,RESTART
Restart current log file and set the
:RUN DBUTIL.PUB.SYS
database flags.
ENABLE ORDERS FOR ACCESS
DISABLE ORDERS FOR RECOVERY
ENABLE ORDERS FOR MUSTRECOVER
EXIT
:EOJ