Database Management
Reference Manual
Introduction to Database Concepts
:
Extracts
: Errors for Extract Operations
Errors for Extract Operations
Potential problems at issue and refresh are the same as for SAVEWORK and GETWORK on multiwrite DBs, i.e. there could be a name clash, or an owning element could be deleted. Such problems will need to resolved in the extract prior to issuing being allowed.
If doing a partial issue or flush or if issuing from an extract, then extra checks are applied as follows:
•
Where a non primary element has changed owner, then the old primary owner and the new primary owner must both be issued back at the same time.
•
If an element has been unnamed, and the name reused, then both elements must be flushed back together.
•
If an element and its owner have been created then:
1.
if it is included in a partial flushback, then so must its owner.
2.
if the owner is include in a partial drop, then so must the element itself
•
if an element and its owner have been deleted then:
1.
if it is included in a partial drop, then so must it's owner.
2.
if the owner is included in a partial flush, then so must it.
Where an element has not been claimed, then Drop can still be used to lose the local changes.
Note:
When a partial issue or drop is made there is no guarantee that the data is 'Engineering correct'. Users are advised to run Clasher and/or Datacon on the resultant version.
1974 to current year.
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