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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Indeed, </span><span style='color:#1F497D'>OptimizedAggregateReader
is the place. Make sure your SelectAggregates command is instantiating such a
reader.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Dan.</span><span
style='font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
fdo-users-bounces@lists.osgeo.org [mailto:fdo-users-bounces@lists.osgeo.org] <b>On
Behalf Of </b>Piet Bibber<br>
<b>Sent:</b> Monday, October 01, 2007 10:16 AM<br>
<b>To:</b> FDO Users Mail List<br>
<b>Subject:</b> Re: [fdo-users] Improving performance for NEN1878 provider,
howto?<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<p class=MsoNormal>Robert, Badreddine, Gavin<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>I do provide the extends and counts in <span
style='font-size:10.0pt'>Nen1878OptimizedAggregateReader. Is that what you
refer to?</span><o:p></o:p></p>
</div>
<p>Piet<o:p></o:p></p>
<div>
<p class=MsoNormal><br>
<br>
<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span class=gmailquote>On 10/1/07, <b>Robert Fortin</b> <<a
href="mailto:robert.fortin@autodesk.com">robert.fortin@autodesk.com</a>>
wrote:</span> <o:p></o:p></p>
<p class=MsoNormal>Badreddine,<br>
<br>
Isn't it the combination of count and spatialExtents that need to be<br>
optimized?<br>
I believe Map looks for the equivalent of<br>
<br>
Select SpatialExtents(geometry), count(*) from <class><br>
<br>
RF<br>
<br>
<br>
-----Original Message-----<br>
From: <a href="mailto:fdo-users-bounces@lists.osgeo.org">fdo-users-bounces@lists.osgeo.org
</a><br>
[mailto:<a href="mailto:fdo-users-bounces@lists.osgeo.org">fdo-users-bounces@lists.osgeo.org</a>]
On Behalf Of Badreddine<br>
Karoui<br>
Sent: Monday, October 01, 2007 9:42 AM<br>
To: <a href="mailto:fdo-users@lists.osgeo.org">fdo-users@lists.osgeo.org</a><br>
Subject: RE: [fdo-users] Improving performance for NEN1878 provider,<br>
howto?<br>
<br>
Hi,<br>
<br>
You may want to implement the FdoISelectAggregates command plus the<br>
SpatialExtents and Count functions. If these two functions are not <br>
implemented, then Map will scan all the geometries to find the minimum<br>
bounding rectangle of all the data.<br>
<br>
Badreddine<br>
<br>
-----Original Message-----<br>
From: <a href="mailto:fdo-users-bounces@lists.osgeo.org">fdo-users-bounces@lists.osgeo.org</a><br>
[mailto:<a href="mailto:fdo-users-bounces@lists.osgeo.org">fdo-users-bounces@lists.osgeo.org</a>]
On Behalf Of Piet Bibber<br>
Sent: Monday, October 01, 2007 7:46 AM<br>
To: <a href="mailto:fdo-users@lists.osgeo.org">fdo-users@lists.osgeo.org</a><br>
Subject: [fdo-users] Improving performance for NEN1878 provider, howto?<br>
<br>
<br>
Hello,<br>
<br>
My NEN1878 provider is almost done, but performance is not so fantastic<br>
when<br>
reading the geometry; reading the schema is alright. <br>
That is stange, as I cache in the geometry when I read the schema<br>
(NEN1878<br>
schema discovery requires a full file scan; no seperate schema header).<br>
(The<br>
schema is read within 3 seconds for a 2.3MB file, including the geometry <br>
and<br>
attributes (all in memory (using STL)).<br>
The SDF and SHP all seem so fast :-)<br>
<br>
Map 3D seem to spend most of his time caching in the geometry (see<br>
source<br>
code below)<br>
<br>
I based my provider on the SHP provider, the reader seem to use <br>
FDO_READER<br>
template, but I can't find where that points to. Maybe there are better<br>
optimized readers.<br>
<br>
Thanks.<br>
Piet<br>
<br>
Excerpt from the source files:<br>
<br>
FdoByteArray * CreateCachedGeometry(FdoByteArray* fgfByteArray_I) <br>
{<br>
FdoByteArray* fgfByteArray =
fgfByteArray_I; // it may be<br>
reallocated<br>
int
count = mFeature->GetNumPoints();<br>
FdoInt32 numPointOrds = 2;<br>
FdoInt32 numBytesForOrdinates =
numPointOrds * <br>
sizeof(double)<br>
* count;<br>
FdoInt32 numParts = 0;<br>
FdoGeometryType fdoGeomType =
GetFdoGeometryType();<br>
FdoInt32 dimensionality =
FdoDimensionality_XY;<br>
FdoInt32 numPositions
= mFeature->GetNumPoints(); <br>
<br>
fgfByteArray->Clear();<br>
<br>
fgfByteArray =
FdoByteArray::Append(fgfByteArray,<br>
sizeof(fdoGeomType), (FdoByte *) &fdoGeomType);<br>
<br>
switch (fdoGeomType)<br>
{<br>
case FdoGeometryType_None: <br>
break;<br>
<br>
case
FdoGeometryType_Point:<br>
fgfByteArray =
FdoByteArray::Append(fgfByteArray,<br>
sizeof(dimensionality), (FdoByte*)&dimensionality);<br>
fgfByteArray =
FdoByteArray::Append(fgfByteArray, <br>
numBytesForOrdinates, (FdoByte*)mFeature->GetPoints());<br>
break;<br>
<br>
case
FdoGeometryType_LineString:<br>
fgfByteArray =
FdoByteArray::Append(fgfByteArray,<br>
sizeof(dimensionality), (FdoByte *) &dimensionality); <br>
fgfByteArray =
FdoByteArray::Append(fgfByteArray,<br>
sizeof(count),<br>
(FdoByte *)&count);<br>
fgfByteArray =
FdoByteArray::Append(fgfByteArray,<br>
numBytesForOrdinates, (FdoByte *)mFeature->GetPoints()); <br>
break;<br>
<br>
default:<br>
throw<br>
FdoException::Create(FdoException::NLSGetMessage(FDO_NLSID(FDO_10_UNSUPP<br>
ORTEDGEOMETRYTYPE)));<br>
}<br>
<br>
return
(fgfByteArray); <br>
}<br>
<br>
<br>
// Returns pointer to vector of DoublePoints<br>
inline DoublePoint* Nen1878Feature::GetPoints()<br>
{<br>
return (&mCoordinates[0]);<br>
}<br>
<br>
--<br>
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