setting ppDBPipeLine.MasterDataPipeline at runtime

rbuser

I need to be able to define the sql queries at runtime, so
programaticaly create ppDBPipeLine-DataSource-DataSet component sets to
suit.

My reports contain subreports, requiring their own query.

I can manipulate ppDBPipeLine.MasterDataPipeline at designtime, but not
runtime as required. This property appears to be a pure placeholder
with a null getter and setter.

What do I need to do ?

Thanks in advance,

John Wilson

nicocizik

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Tech Tip: Define Master/Detail DataPipeline Links in Code
---------------------------------------------------------

Defining a Master/Detail relationship for a DataPipeline
requires that the detail pipeline have the
following properties defined:

1. MasterDataPipeline

2. MasterFieldLinks


At Delphi design-time you can use the object inspector
and the DataPipeline's FieldLinks editor to define
the master/detail relationship.


The following example illustrates how to define the
master/detail relationship dynamically at run-time.


var
lFieldLink: TppMasterFieldLink;


begin

{define the master/detail pipeline relationship}
plDetail.MasterDataPipeline := plMaster;

{create a new field link }
lFieldLink := TppMasterFieldLink.Create(nil);

lFieldLink.Parent := plDetail;

{assign the detail field name}
lFieldLink.DetailFieldName := 'CustNo';

{assign the master field name}
lFieldLink.MasterFieldName := 'CustNo';


end;


Note: The DataPipeline linking requires the records in the detail dataset to
be ordered by the linking fields. In the above example, the detail data must
be ordered by CustNo.


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