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-rw-r--r--sql/trigger.sql57
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diff --git a/sql/trigger.sql b/sql/trigger.sql
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--- createlang pgpgsql ebus
-
-CREATE TABLE value_cache ( LIKE value );
-
-DELETE FROM value_cache;
-
--- Create a function that always returns the first non-NULL item
-CREATE OR REPLACE FUNCTION public.first_agg ( anyelement, anyelement ) RETURNS anyelement AS $$
- SELECT CASE WHEN $1 IS NULL THEN $2 ELSE $1 END;
-$$ LANGUAGE SQL STABLE;
-
--- And then wrap an aggreagate around it
-CREATE AGGREGATE public.first (
- sfunc = public.first_agg,
- basetype = anyelement,
- stype = anyelement
-);
-
-DROP FUNCTION value_insert_trigger_func() CASCADE;
-
---CREATE FUNCTION value_insert_trigger_func() RETURNS trigger AS $$
--- BEGIN
--- DELETE FROM value_cache
--- WHERE date_trunc('hour', timestamp) =
--- (SELECT date_trunc('hour', max(timestamp)) FROM value)
--- AND sensor_id = (SELECT sensor_id from value where id = (select max(id) from value));
---
--- INSERT INTO value_cache
--- SELECT
--- COALESCE(0, (select max(id)+1 from value_cache)) as "id" --XXX use seq
--- ,date_trunc('hour', timestamp) AS "timestamp"
--- ,sensor_id AS "sensor_id"
--- ,type AS "type"
--- ,AVG(value_float) AS "value_float"
--- ,AVG(value_int) AS "value_int"
--- ,first(value_string) AS "value_string"
--- FROM value
--- WHERE date_trunc('hour', timestamp) = (SELECT date_trunc('hour', max(timestamp)) FROM value)
--- AND sensor_id = (SELECT sensor_id FROM value WHERE id = (SELECT MAX(id) FROM value))
--- GROUP BY type, sensor_id, date_trunc('hour', timestamp);
--- RETURN NULL;
--- END;
---$$ LANGUAGE plpgsql;
-
-
-CREATE FUNCTION value_insert_trigger_func() RETURNS trigger AS $$
- BEGIN
- NOTIFY evt_ebus_value_insert;
-
- RETURN NULL;
- END;
-$$ LANGUAGE plpgsql;
-
--- DROP TRIGGER value_insert_trigger ON value;
-
-CREATE TRIGGER value_insert_trigger
- AFTER INSERT ON value FOR EACH STATEMENT EXECUTE PROCEDURE value_insert_trigger_func();