Detail-Queries are parametrized queries with the primary key of the
master-dataset as search-parameter for the foreign key of the detail.
Whenever you navigate in the master, the detail will be executed with a new
parameter value.
HDR has got nothing to do with this case.
HDR _will_ help, if you get large sets of details and want to do search _in_
them, but the MD-mechanism itself is as fast as it can get.

CU,

Nick Josipovic
CMCI/Research Labs
Global Corporate Communications
SAP AG

Neurottstrasse 16
69190 Walldorf
T ++49 6227 762945
F ++49 6227 7834457
E nikica.josipovic@...
http://www.sap.com/germany



-----Original Message-----
From: Christian Gütter [mailto:cguetter@...]
Sent: Friday, November 16, 2001 11:39 AM
To: ibobjects@yahoogroups.com
Subject: [IBO] HDR


Hi list,


due to the successes of Guido Klapperich I am also playing
with the HDR (Horizontal Dataset Refinement). I saw that it
increases the speed of my queries with large result sets.

Now a small question. I have got to tables, A and B, and a
Master-Detail relationship using IBO's Masterlinks.

A is master, quite small, about 4.000 records. B is a larger
table with 30.000 records.
Does it make sense to activate HDR for the detail table,
will HDR speed up the search for the detail records
(about 5 to 40 records)?


TIA,

Christian

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