[UMN_MAPSERVER-DEV] OracleSpatial 10i GetExtent slow

[Benedikt Rothe]

Hi Johan

It is not on me to answer on your feature-request. 

Maybe the following SQL-Statement is helpfull for you. It delivers the
Oracle-Metadata:

select owner,table_name,column_name,d.*
from all_sdo_geom_metadata m,
     table(m.DIMINFO) d

Since the result of this query  is a simple relation (no oracle-objects) 
it
can be used from any Oracle-Interface (xDBC, ADOxxx, ...)

By
Benedikt

UMN MapServer Developers List <MAPSERVER-DEV at LISTS.UMN.EDU> schrieb am 
26.02.2006 12:53:04:

> I hope you all understood that there still is a need for function that
> retrieves the layerextent from metadata if it's available (as Frank
> mentions). In my case we have over a million records in the table and to
> calculate extent for the layer by go true all those records will take to
> much time.
> 
> Best regards
> Johan
> 
> ___________________________________
> 
> 
> Johan Hallgren
> WM-data
> 
> 
> Pelle Bergs backe 3
> Box 1938, 791 19 Falun
> Tel: 023-844 65 (int: +46-2384465)
> Mobil: 070-588 44 28 (int: +46-705884428)
> johan.e.hallgren at wmdata.com
> http://www.wmdata.se
> 
> -----Original Message-----
> From: UMN MapServer Developers List [mailto:MAPSERVER-DEV at LISTS.UMN.EDU]
> On Behalf Of Daniel Morissette
> Sent: den 24 februari 2006 21:18
> To: MAPSERVER-DEV at LISTS.UMN.EDU
> Subject: Re: [UMN_MAPSERVER-DEV] OracleSpatial 10i GetExtent slow
> 
> Sean Gillies wrote:
> > On Feb 24, 2006, at 8:12 AM, Frank Warmerdam wrote:
> > 
> >> Hallgren Johan E wrote:
> >>
> >>> Hello
> >>>
> >>> I have used the mapscript function getExtent for a layer, to get the
> >>> extent, that one was slow. Do you mean that the msOWSGetLayerExtent
> >>> would be faster?
> >>>
> >>> Could it be possible to change the logic so the function I need
> would
> >>> run the msOWSGetLayerExtent instead?
> >>
> >>
> >> Johan / others,
> >>
> >> I'm no expert on this area of the code, but it definitely seems  like
> we
> >> ought to offer a mapscript mechanism that works like 
> >> msOWSGetLayerExtent,
> >> using layer metadata if available.
> >>
> >> In the meantime Johan, if you already know your extents (as you
> would 
> >> have
> >> to for setting up OWS metadata on a layer) you could just modify your
> >> mapscript application to hardcode the extent or perhaps to pull it 
> >> manually
> >> from layer metadata.
> > 
> > 
> > Layers have an extent just like the map, so that's probably better
> than 
> > the metadata. layerObj.getExtent will preferentially return the
> layer's 
> > extent attribute, and then fall back on a query of the  datasource.
> > 
> > I can't say for sure if this is implemented for the PHP mapscript.
> > 
> 
> Yes, PHP MapScript's $layer->getExtent() calls msLayerGetExtent() 
> directly the same way as the SWIG equivalent.
> 
> Daniel
> -- 
> ------------------------------------------------------------
>   Daniel Morissette               dmorissette at dmsolutions.ca
>   DM Solutions Group              http://www.dmsolutions.ca/
> ------------------------------------------------------------
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