-- Create a conf table
SELECT cdb_geocoder_server._config_set('cds', '{"Manolo Escobar": {"El Limonero":"En stock", "Viva el vino":"Sin stock"}}');
 _config_set 
-------------
 
(1 row)

-- Test key retrieval
SELECT cdb_geocoder_server._config_get('cds');
                                _config_get                                 
----------------------------------------------------------------------------
 {"Manolo Escobar": {"El Limonero":"En stock", "Viva el vino":"Sin stock"}}
(1 row)

-- Test returns NULL if key doesn't exist
SELECT cdb_geocoder_server._config_get('no existe');
 _config_get 
-------------
 
(1 row)