I am looking for some documentation or manual or reference guide for Netezza Spatial Functions.
Any idea where can I get the same.
The Netezza Spatial documentation that I use was included in the download from the IBM\Netezza portal\ftp site.
As in, along with the nz-analytics-v2.0.3 download, there are nz-analyticsdoc-v2.0.3 and nz-analyticsdochtml-v2.0.3 downloads.
Unpackaging nz-analyticsdoc-v2.0.3, you'll find two pdfs: Netezza_Spatial_Package_Reference_Guide-2.0.3.pdf Netezza_Spatial_Package_Users_Guide.pdf
I've never found them online.
I would talk to whoever maintains your Netezza Appliance, or failing that, an IBM rep.