getLocus()
Returns a value that indicates where the UDX is currently executing.
The values returned by getLocus() are one of the following values.
| DBOS | The UDX is running on the host system. |
| SPU | The UDX is running in parallel on the SPUs. |
| POSTGRES | The UDX is in the compile step (not yet executing). |
| NZLUA | The code is being executed outside of the Netezza database using the nzlua command line. |