Geo-partitioning helper functions
The followinng functions are primarily helpful while implementing Row-level geo-partitioning, as they can significantly simplify inserting rows from user's server and selecting rows from the local partition.
|yb_is_local_table(oid)||boolean||Returns whether the given 'oid' is a table replicated only in the local region|
|yb_server_region()||varchar||Returns the region of the currently connected node|
|yb_server_zone()||varchar||Returns the zone of the currently connected node|
|yb_server_cloud()||varchar||Returns the zone of the currently connected node|