Sum until threshold value reached and then reset the counter

Question

user_id | date                 | distance
1       | 2019-04-09 00:00:00  | 2
1       | 2019-04-09 00:00:30  | 5
1       | 2019-04-09 00:01:00  | 3
1       | 2019-04-         


        

Answer 1

As variant you can use RECURSIVE CTE to get it

Test table:

CREATE TABLE public.table_b (
    user_id int4 NULL,
    "date" timestamp NULL,
    distance int4 NULL
);

INSERT INTO public.table_b (user_id,"date",distance) VALUES 
(1,'2019-04-09 00:00:00.000',2)
,(1,'2019-04-09 00:00:30.000',5)
,(1,'2019-04-09 00:01:00.000',3)
,(1,'2019-04-09 00:01:45.000',7)
,(1,'2019-04-09 00:02:30.000',6)
,(1,'2019-04-09 00:03:00.000',1)
,(2,'2019-04-09 00:00:00.000',2)
,(2,'2019-04-09 00:00:30.000',5)
,(2,'2019-04-09 00:01:00.000',3)
,(2,'2019-04-09 00:01:45.000',7)
,(2,'2019-04-09 00:02:30.000',6)
,(2,'2019-04-09 00:03:00.000',1);

Query:

WITH RECURSIVE cte1 AS(
    SELECT *,ROW_NUMBER()OVER(PARTITION BY user_id ORDER BY date) n
    FROM table_b
),
cte2 AS(
    SELECT user_id,date,distance,distance running_distance,n
    FROM cte1
    WHERE n=1

    UNION ALL

    SELECT c1.user_id,c1.date,c1.distance,CASE WHEN c2.running_distance<10 THEN c2.running_distance ELSE 0 END+c1.distance running_distance,c1.n
    FROM cte1 c1
    JOIN cte2 c2 ON c2.user_id=c1.user_id AND c2.n+1=c1.n
)
SELECT user_id,date,distance,running_distance
FROM cte2
ORDER BY user_id,date