Issue 7829: Intermediate Queries (plm-ftf)
Source: Zentrum fuer Graphische Datenverarbeitung e.V. (Mr. Steffen Nowacki, steffen.nowacki(at)partmaster.de)
Nature: Uncategorized Issue
Severity: 
Summary: The result of the concatenation of queries
is defined as the union of the result of the
single queries.


Some use cases needs another semantic of concatenated queries.
F.i. for the Start node identification use case
the set of Items selected by an Item_query
have to be filtered by an (optional)
following Item_version_query.
In this case the ItemQuery doesn't contribute directly to the
result of the whole concatenated query
but is only an intermediate step to define the start nodes
of the following Item_version_query.


To switch the semamtics of concatenation between


   A) union of single result
   B) intermediate step without contribution to the result
       but with contribution to the start nodes of the next queries
a flag should be added to the class Query called "Intermediate".

Resolution: 
Revised Text: 
Actions taken:
October 1, 2004: received issue
Discussion: 
Defer the general solution but solve specific case as in issue 7924. This feature will be realized by an extensions to the query mechanism in PLM Services 2.0
End of Annotations:=====
te: Fri, 01 Oct 2004 12:02:59 +0200 
From: Steffen Nowacki <steffen.nowacki@partmaster.de> 
User-Agent: Thunderbird 0.6 (Windows/20040502) 
X-Accept-Language: de-de, de-at, de, en-us, en 
To: issues@omg.org 
Subject: issue for PLM Services 1.0 


PLM Services 1.0
Document mantis/04-04-01
Revision Date 05/05/2004
Chapter 3.7.6
Page: 358


Intermediate Queries


The result of the concatenation of queries
is defined as the union of the result of the
single queries.


Some use cases needs another semantic of concatenated queries.
F.i. for the Start node identification use case
the set of Items selected by an Item_query
have to be filtered by an (optional)
following Item_version_query.
In this case the ItemQuery doesn't contribute directly to the
result of the whole concatenated query
but is only an intermediate step to define the start nodes
of the following Item_version_query.


To switch the semamtics of concatenation between


   A) union of single result
   B) intermediate step without contribution to the result
       but with contribution to the start nodes of the next queries
a flag should be added to the class Query called "Intermediate".


Steffen Nowacki
PartMaster GmbH