H2 SQL Query column not found in scope - sql

Question

In relation with : SQL: Find unavailability per minute of a ressource in an appointment
((click above link for schema + info))
I'm trying to run this query in an H2 SQL database. I'm a little unfamiliar with H2 syntax. I noted the column num in the WHERE clause that causes the issue.
Error:
Column "NUM" not found; SQL statement:
CREATE FORCE VIEW (
SELECT
"A"."APPOINTMENT_ID",
"A"."APPOINTMENT_START_TIME",
"A"."APPOINTMENT_END_TIME",
"C"."COMPONENT_HOST_NAME",
'unavailable' AS "STATE"
FROM "PUBLIC"."APPOINTMENT" "A"
LEFT OUTER JOIN "PUBLIC"."APPOINTMENT_COMPONENT" "AC"
ON "A"."APPOINTMENT_ID" = "AC"."APPOINTMENT_ID"
INNER JOIN "PUBLIC"."COMPONENT" "C"
ON "C"."COMPONENT_ID" = "AC"."COMPONENT_ID"
WHERE ((CONVERT("A"."APPOINTMENT_START_TIME", TIME) <= DATEADD('minute', "NUM", CAST('00:00:00' AS TIME)))
AND (CONVERT("A"."APPOINTMENT_END_TIME", TIME) >= DATEADD('minute', "NUM", CAST('00:00:00' AS TIME))))
AND ("C"."COMPONENT_ID" IN(1))
FETCH FIRST ROW ONLY
) AS
SELECT
"A"."APPOINTMENT_ID",
"A"."APPOINTMENT_START_TIME",
"A"."APPOINTMENT_END_TIME",
"C"."COMPONENT_HOST_NAME",
'unavailable' AS "STATE"
FROM "PUBLIC"."APPOINTMENT" "A"
LEFT OUTER JOIN "PUBLIC"."APPOINTMENT_COMPONENT" "AC"
ON "A"."APPOINTMENT_ID" = "AC"."APPOINTMENT_ID"
INNER JOIN "PUBLIC"."COMPONENT" "C"
ON "C"."COMPONENT_ID" = "AC"."COMPONENT_ID"
WHERE ((CONVERT("A"."APPOINTMENT_START_TIME", TIME) <= DATEADD('minute', "NUM", CAST('00:00:00' AS TIME)))
AND (CONVERT("A"."APPOINTMENT_END_TIME", TIME) >= DATEADD('minute', "NUM", CAST('00:00:00' AS TIME))))
AND ("C"."COMPONENT_ID" IN(1))
FETCH FIRST ROW ONLY [42122-200] 42S22/42122 (Help)
My code:
with times(num) as
(
select 30 as num
union all select (num + 30)
from times where num < (24*60)
)
select dateadd('minute', num, cast('00:00:00' as time)) as datetimeinterval, unavailabilities.state from times
outer join(
select top 1 a.appointment_id, a.appointment_start_time, a.appointment_end_time, c.component_host_name, 'unavailable' as state
from appointment a
left join appointment_component ac on a.appointment_id = ac.appointment_id
inner join component c on c.component_id = ac.component_id
where
dateadd('minute', -->num<--, cast('00:00:00' as time)) between convert(a.appointment_start_time, time) and convert(a.appointment_end_time, time)
and
c.component_id in (1)
) unavailabilities
TLDR: Trying to get unavailabilities of a list of components by the minute or by a range of minutes (30 minutes here). Num should return a multiple of 30 in this case, depending on the time frame selected for which it will check if the components are taken or not.
N.B. I changed machine=component and appmach=appointment_component (cross table) from the link above

Answer 1

I am not sure about the syntax. I am not very much familiar with H2. But isn't num should be used in on clause instead of subquery ? Please check:
with recursive times(num) as
(
select 30 as num
union all select (num + 30)
from times where num < (24*60)
)
select dateadd('minute', num, cast('00:00:00' as time)) as datetimeinterval, unavailabilities.state from times
outer join(
select top 1 a.appointment_id, a.appointment_start_time, a.appointment_end_time, c.component_host_name, 'unavailable' as state
from appointment a
left join appointment_component ac on a.appointment_id = ac.appointment_id
inner join component c on c.component_id = ac.component_id
where
dateadd('minute', -->num<--, cast('00:00:00' as time)) between convert(a.appointment_start_time, time) and convert(a.appointment_end_time, time)
and
c.component_id in (1)
) unavailabilities
on dateadd('minute', num, cast('00:00:00' as time)) between convert(appointment_start_time, time) and convert(appointment_end_time, time)