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Update database templates to v0.3.10.

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* Add interpolate_geometry_from_tstamp()
This commit is contained in:
D. Berge
2022-05-12 21:52:31 +02:00
parent 23de4d00d7
commit 69f565f357
2 changed files with 74 additions and 2 deletions
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72
etc/db/database-template.sql
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@@ -273,6 +273,78 @@ ALTER FUNCTION public.geometry_from_tstamp(ts timestamp with time zone, toleranc
COMMENT ON FUNCTION public.geometry_from_tstamp(ts timestamp with time zone, tolerance numeric, OUT geometry public.geometry, OUT delta numeric) IS 'Get geometry from timestamp';
--
-- Name: interpolate_geometry_from_tstamp(timestamp with time zone, numeric); Type: FUNCTION; Schema: public; Owner: postgres
--
CREATE FUNCTION public.interpolate_geometry_from_tstamp(ts timestamp with time zone, maxspan numeric) RETURNS public.geometry
LANGUAGE plpgsql
AS $$
DECLARE
ts0 timestamptz;
ts1 timestamptz;
geom0 geometry;
geom1 geometry;
span numeric;
fraction numeric;
BEGIN
SELECT tstamp, geometry
INTO ts0, geom0
FROM real_time_inputs
WHERE tstamp <= ts
ORDER BY tstamp DESC
LIMIT 1;
SELECT tstamp, geometry
INTO ts1, geom1
FROM real_time_inputs
WHERE tstamp >= ts
ORDER BY tstamp ASC
LIMIT 1;
IF geom0 IS NULL OR geom1 IS NULL THEN
RAISE NOTICE 'Interpolation failed (no straddling data)';
RETURN NULL;
END IF;
-- See if we got an exact match
IF ts0 = ts THEN
RETURN geom0;
ELSIF ts1 = ts THEN
RETURN geom1;
END IF;
span := extract('epoch' FROM ts1 - ts0);
IF span > maxspan THEN
RAISE NOTICE 'Interpolation timespan % outside maximum requested (%)', span, maxspan;
RETURN NULL;
END IF;
fraction := extract('epoch' FROM ts - ts0) / span;
IF fraction < 0 OR fraction > 1 THEN
RAISE NOTICE 'Requested timestamp % outside of interpolation span (fraction: %)', ts, fraction;
RETURN NULL;
END IF;
RETURN ST_LineInterpolatePoint(St_MakeLine(geom0, geom1), fraction);
END;
$$;
ALTER FUNCTION public.interpolate_geometry_from_tstamp(ts timestamp with time zone, maxspan numeric) OWNER TO postgres;
--
-- Name: FUNCTION interpolate_geometry_from_tstamp(ts timestamp with time zone, maxspan numeric); Type: COMMENT; Schema: public; Owner: postgres
--
COMMENT ON FUNCTION public.interpolate_geometry_from_tstamp(ts timestamp with time zone, maxspan numeric) IS 'Interpolate a position over a given maximum timespan (in seconds)
based on real-time inputs. Returns a POINT geometry.';
--
-- Name: notify(); Type: FUNCTION; Schema: public; Owner: postgres
--

4
etc/db/database-version.sql
View File

@@ -1,3 +1,3 @@
INSERT INTO public.info VALUES ('version', '{"db_schema": "0.3.9"}')
INSERT INTO public.info VALUES ('version', '{"db_schema": "0.3.10"}')
ON CONFLICT (key) DO UPDATE
SET value = public.info.value || '{"db_schema": "0.3.9"}' WHERE public.info.key = 'version';
SET value = public.info.value || '{"db_schema": "0.3.10"}' WHERE public.info.key = 'version';