Difference between revisions of "Database Timelines"
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Revision as of 06:29, 2 November 2009
Contents
Database Timelines
What are Database Timelines?
Database timelines provide row versioning for Recital database applications. Whenever a change is made to a table that is timeline enabled then delta changes are automatically recorded for each transaction. Changes made to any tables that are timeline enabled can be undone much like you would undo changes to program code that you edit in a text editor.
Using Database Timelines
To enable database timelines all you need to do is issue the SET TIMELINE ON command in your Recital configuration file.
SET TIMELINE ON
Viewing a timeline
There are 2 ways to view a timeline.
- The LIST TIMELINE command
- The SELECT * FROM SYSTIMELINE command
LIST TIMELINE [RANGE begin [,end]] [FOR condition] [TO FILE filename]
Undoing database changes
You can undo database changes with the ROLLBACK TIMELINE command.
ROLLBACK TIMELINE [RANGE begin [, end]] [FOR condition]
Clearing a timeline
The CLEAR TIMELINE command will reset a timeline.
CLEAR TIMELINE
