database stuff

schema/create.sql

@@ -23,3 +23,10 @@ select create_hypertable('pv_power_measurement_t', 'time');
 
 grant insert on pv_power_measurement_t to nodered;
 grant select on pv_power_measurement_t to grafana;
+
+create view pv_stats_v as
+  select time, importEnergyActive, importEnergyReactive, exportEnergyActive, exportEnergyReactive,
+         powerApparent, powerActive, powerReactive, powerDemandPositive, powerDemandReverse, powerDemand,
+         factor, angle, voltage, current
+    from pv_power_measurement_t
+    order by time;

schema/queries.sql

@@ -0,0 +1,157 @@
+-- current year's gain
+with 
+    first_day_in_year as (
+        select 
+                date_trunc('day', min(time)) as day
+            from pv_power_measurement_t
+            where 
+                time between date_trunc('year', time) and now()
+    ),
+    first_value as (
+        select 
+                time_bucket('1 day', time) as interval,
+                first(exportenergyactive, time) as energy
+            from pv_power_measurement_t
+            where 
+                time between (select day from first_day_in_year) and (select day from first_day_in_year) + interval '1 day' and
+                status = 'Ok'
+            group by interval
+    ),
+    last_value as (
+        select  
+                time_bucket('1 day', time) as interval,
+                last(exportenergyactive, time) as energy
+            from pv_power_measurement_t
+            where 
+                time between date_trunc('day', now()) and date_trunc('day', now()) + interval '1 day' and
+                status = 'Ok'
+            group by interval
+    )
+    select
+        extract(year from (select day from first_day_in_year))::text as period_value,
+        'Year' as period_name,
+        (select energy from last_value) - (select energy from first_value) as yield;
+
+
+
+-- current month's gain
+with 
+    first_day_in_month as (
+        select 
+                date_trunc('day', min(time)) as day
+            from pv_power_measurement_t
+            where 
+                time between date_trunc('month', time) and now()
+    ),
+    first_value as (
+        select 
+                time_bucket('1 day', time) as interval,
+                first(exportenergyactive, time) as energy
+            from pv_power_measurement_t
+            where 
+                time between (select day from first_day_in_month) and (select day from first_day_in_month) + interval '1 day' and
+                status = 'Ok'
+            group by interval
+    ),
+    last_value as (
+        select  
+                time_bucket('1 day', time) as interval,
+                last(exportenergyactive, time) as energy
+            from pv_power_measurement_t
+            where 
+                time between date_trunc('day', now()) and date_trunc('day', now()) + interval '1 day' and
+                status = 'Ok'
+            group by interval
+    )
+    select
+        to_char((select day from first_day_in_month), 'Month') as period_value,
+        'Month' as period_name,
+        (select energy from last_value) - (select energy from first_value) as yield;
+
+
+            
+-- current day's gain
+with
+    values as (
+        select
+                time_bucket('1 day', time) as interval,
+                first(exportenergyactive, time) as first_value,
+                last(exportenergyactive, time) as last_value
+            from pv_power_measurement_t
+            where time >= date_trunc('day', now())
+            group by interval
+    )
+    select
+        (select interval from values)::date::text as period_value,
+        'Day' as period_name,
+        (select last_value from values) - (select first_value from values) as yield;
+
+
+-- all in one
+with 
+    first_day_in_year as (
+        select 
+                date_trunc('day', min(time)) as day
+            from pv_power_measurement_t
+            where 
+                time between date_trunc('year', time) and now()
+    ),
+    first_value_in_year as (
+        select 
+                time_bucket('1 day', time) as interval,
+                first(exportenergyactive, time) as energy
+            from pv_power_measurement_t
+            where 
+                time between (select day from first_day_in_year) and (select day from first_day_in_year) + interval '1 day' and
+                status = 'Ok'
+            group by interval
+    ),
+    first_day_in_month as (
+        select 
+                date_trunc('day', min(time)) as day
+            from pv_power_measurement_t
+            where 
+                time between date_trunc('month', time) and now()
+    ),
+    first_value_in_month as (
+        select 
+                time_bucket('1 day', time) as interval,
+                first(exportenergyactive, time) as energy
+            from pv_power_measurement_t
+            where 
+                time between (select day from first_day_in_month) and (select day from first_day_in_month) + interval '1 day' and
+                status = 'Ok'
+            group by interval
+    ),
+    first_value_in_day as (
+        select
+                time_bucket('1 day', time) as interval,
+                first(exportenergyactive, time) as energy
+            from pv_power_measurement_t
+            where time >= date_trunc('day', now())
+            group by interval
+    ),
+    last_value as (
+        select  
+                time_bucket('1 day', time) as interval,
+                last(exportenergyactive, time) as energy
+            from pv_power_measurement_t
+            where 
+                time between date_trunc('day', now()) and date_trunc('day', now()) + interval '1 day' and
+                status = 'Ok'
+            group by interval
+    )
+    select
+        extract(year from (select day from first_day_in_year))::text as period_value,
+        'Year' as period_name,
+        round(((select energy from last_value) - (select energy from first_value_in_year))::numeric, 2) as yield
+    union
+    select
+        to_char((select day from first_day_in_month), 'Month') as period_value,
+        'Month' as period_name,
+        round(((select energy from last_value) - (select energy from first_value_in_month))::numeric, 2) as yield
+    union
+    select
+        now()::date::text as period_value,
+        'Day' as period_name,
+        round(((select energy from last_value) - (select energy from first_value_in_day))::numeric, 2) as yield;