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PREVIEW
Provides a preview of the results of a proposed merge, before the actual
merge takes place.
Syntax
PREVIEW [STRUCTURE-ONLY] [.]
Parameters
STRUCTURE- ONLY If this parameter is specified, then only the dictionary
structure will be previewed. This parameter, if
specified, must be on the same line as the PREVIEW
command.
Discussion
This command allows you to see the consequences of a merge without
actually modifying a dictionary. Note that the preview process can only
be used if the target dictionary is a master dictionary.
This commands generates a report that shows the results of the merge. If
structure is being previewed, the report will contain the following
information:
* Differences in the external names of entity types, relationship
classes and attributes.
* Differences in attribute data-types, lengths, and edit values.
* Differences between attributes which belong to each entity type's and
relationship type's attribute list.
When previewing versions, the structure differences, if any, will be
reported as described above. Unless the COMPLETE-STRUCTURE option is
selected, the preview will be limited to the structure pertinent to the
version only. In addition to the structure differences report, the
following will be reported:
* Differences in the external names of scopes if security is previewed.
* Differences in attribute values of the entities and relationships.
If you are previewing a dictionary version, the PREVIEW process will also
create SDMAIN commands and store them in the file SDMCOM. These commands
include the DEFINE command(s) which define the environment from which
occurrences are to be deleted. They also include the SDMAIN commands
'DELETE RELATIONSHIP' and 'DELETE ENTITY', which will delete any
occurrences which exist in the target dictionary but not in the source.
Note that you can then modify this file and use it as input to SDMAIN if
desired.
Example
>PREVIEW.
>