[postgis-devel] Geomtries

[Leticia]

Hi, I need to build a new index. It is similar to R-tree but their entries
nodes contains not only the MBRs but some numeric information.

I am using a "CREATE TYPE" in order to create the data type for the table.
The SQL sentences look like

 

.

 

CREATE TYPE New_Type

(

   internallength = -1, 

   input = New_Type_IN,

   output = New_Type_OUT,

   storage= plain

);

 

.

 

CREATE TABLE proof (col   New_type);

 

CREATE INDEX anIndex ON proof USING GiST(  col   New_Type_Ops);

.

 

 

As I am creating an opaque data type, I need to create an equivalent one in
C language. I need something like this:

 

/* C language */

typedef struct My_New_Type

{

    ???  geometry;

    float4  number;

} My_New_Type;

 

Which kind of Postgis data type must I use in the "geometry" field
structure. 

As the "My_New_Type" will be stored as the "col" attribute in the table, I
need it not to be a "pointer" so I can't declare as PG_LWGEOM, LWGEOM, etc.

 

 

Could you help me?

Thanks in advance,

Leticia

 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/postgis-devel/attachments/20070315/19cbd490/attachment.html>