[fdo-internals] Request review of RFC28-AddStart/EndExpressionFunctions

[Jason Birch]

You can have an X(geometry) that returns null for non-points.  Unless
the EndPoint is important.

 

From: fdo-internals-bounces at lists.osgeo.org
[mailto:fdo-internals-bounces at lists.osgeo.org] On Behalf Of Dan Stoica
Sent: Wednesday, November 05, 2008 08:53
To: FDO Internals Mail List
Subject: RE: [fdo-internals] Request review of
RFC28-AddStart/EndExpressionFunctions

 

Then you cannot have only X(geometry). In addition a PointN() function
is needed as well.

 

Dan.

 

From: fdo-internals-bounces at lists.osgeo.org
[mailto:fdo-internals-bounces at lists.osgeo.org] On Behalf Of Robert
Fortin
Sent: Wednesday, November 05, 2008 11:48 AM
To: FDO Internals Mail List
Subject: RE: [fdo-internals] Request review of RFC
28-AddStart/EndExpressionFunctions

 

Following other functions declaration (RFC-8, RFC-11 and that's what the
RFC-28 indicated), it's a property name which in this case has to be a
geometry property.

 

RF

 

From: fdo-internals-bounces at lists.osgeo.org
[mailto:fdo-internals-bounces at lists.osgeo.org] On Behalf Of Dan Stoica
Sent: Wednesday, November 05, 2008 11:14 AM
To: FDO Internals Mail List
Subject: RE: [fdo-internals] Request review of RFC
28-AddStart/EndExpressionFunctions

 

By geometry you mean the geometry column or a geometry value which
definitely has to be a point?

 

Dan.

From: fdo-internals-bounces at lists.osgeo.org
[mailto:fdo-internals-bounces at lists.osgeo.org] On Behalf Of Robert
Fortin
Sent: Wednesday, November 05, 2008 11:03 AM
To: FDO Internals Mail List
Subject: RE: [fdo-internals] Request review of RFC
28-AddStart/EndExpressionFunctions

 

I'm all for trying to use existing standard and applying to our case.

 

In order to address my use case which is only concerned with point
geometry,  I would have to do and implement the following:

 

X(geometry)

Y(geometry)

Z(geometry)

(and M(geometry) by extension)

 

Everything else is additional to the use case.

 

So the RFC should only be about these 3 functions and mention the
additional ones and trying to match the OGC standard.

 

RF

 

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