A Installation, Compatibility, and Upgrade

A.1 Upgrading LRS Data

If you have linear referencing data (that is, geometries with measure information) in release 8.1.5, 8.1.6, or 8.1.7 format, you must upgrade that data to the format for Spatial releases 9.0.1 and higher, as follows:

1. Drop any spatial indexes on the table with the linear referencing data.

2. Find out which dimension of the object has the linear referencing information.

   This could be the third or the fourth dimension, depending on the dimensionality of the data. For example, if the data has three dimensions (such as X, Y, and height), the LRS geometry object is 4D, and the LRS dimension in this case is usually 4.

3. Make sure that the data is in the format for release 8.1.6 or higher (that is, it has 4-digit SDO_GTYPE values).

4. Update the LRS geometry objects by setting the LRS dimension in the SDO_GTYPE field, as in the following examples.

   Example 1: The LRS dimension is 3 for the geometries in the GEOMETRY column of table LRS_DATA. Update the SDO_GTYPE as follows:

   UPDATE LRS_DATA a SET a.geometry.sdo_gtype = a.geometry.sdo_gtype + 300;
   
   

   Example 2: The LRS dimension is 4 for the geometries in the GEOMETRY column of table LRS_DATA. Update the SDO_GTYPE as follows:

   UPDATE LRS_DATA a SET a.geometry.sdo_gtype = a.geometry.sdo_gtype + 400;