Converts Protocol Buffers (Protobuf) binary data into a trajectory object.
Syntax
trajectory ST_TrajFromProtobuf(bytea protobuf)Parameters
| Parameter | Description |
|---|---|
protobuf |
A bytea value containing Protobuf-encoded trajectory data. For the expected schema, see . |
Return values
Returns a trajectory object. Returns NULL if the input cannot be parsed.
Example
The following query round-trips a trajectory through Protobuf encoding and decoding: st_makeTrajectory builds the trajectory, ST_AsProtobuf serializes it to bytea, and ST_TrajFromProtobuf deserializes it back to a trajectory object.
SELECT ST_TrajFromProtobuf(ST_AsProtobuf(st_makeTrajectory('STPOINT'::leaftype, ARRAY[1::float8], ARRAY[2::float8], 4326, ARRAY['2010-01-01 11:30'::timestamp], ARRAY['velocity'], ARRAY[1::int4], NULL, NULL, NULL::anyarray)));Output:
st_trajfromprotobuf
---------------------------
{"trajectory":{"version":1,"type":"STPOINT","leafcount":1,"start_time":"2010-01-01 11:30:00","end_time":"2010-01-01 ...