Database Management
Reference Manual
Introduction to Database Concepts
:
Extracts
: MERGE CHANGES on Extracts
MERGE CHANGES on Extracts
When a 'MERGE CHANGE' operation is performed on a DB with extracts, all the lower extracts have to be changed to take account of this. Thus doing a 'MERGE CHANGE' on a DB with extracts should not be undertaken lightly. The opposite is not needed, i.e. MERGE CHANGES on a child does not require the parent extract to be merged.
The following restrictions apply to MERGE CHANGES:
1.
Any sessions 'linked' to child extracts are preserved.
2.
There may be no users on any lower extracts.
To minimise the sessions preserved in (1) it is suggested that a bottom up approach is followed when doing 'MERGE CHANGES'.
1974 to current year.
AVEVA Solutions Limited and its subsidiaries. All rights reserved.
