52North/SOS — pull request #128 by CarstenHollmann (2014-09-10 10:21:15+00:00)
Title: Check if the execution of the samplingGeometry extent query should be executed

(improve performance):

- Add pre-query to check if the observation table contains not null samplingGeometries.
- If only samplingGeometries with null value are contained, the extent query is not executed during the offering cache update.