gvSIG-Desktop 1.1. Manual de usuario.

The driver constantly performs geometric requests (in other words constantly calculates which geometries intersect with the current gvSIG view) and it is therefore essential that the database has a spatial index linked to the column in question.

If this index does not exist, an error window appears (figure 1) and the table or view cannot be added to the gvSIG view.

In addition, the driver needs to set a unique identifier for the records of the table or view, and this is not possible for certain types of views. If such a problem occurs, it will be detected by the driver and an error message will also appear (figure 2).

As a result, the view cannot be loaded to gvSIG from the database.

Figure 1. Warning regarding the lack of a spatial index

Figure 2. Warning regarding the fact that a ROWID could not be obtained