Converting SQL view that uses functions to work in snowflake - snowflake-cloud-data-platform

Question

I have a view in SQL server that i'm trying to convert to work in snowflake. The view uses two functions within it that are called to join onto another table.
I'm following steps provided by another user, but i'm getting lost somewhere in the middle and feel a little stuck.
Here is the query for the SQL Server view:
ALTER VIEW [proj].[pvw_PowerBI_ScrapList]
AS
SELECT
e.Name AS ProductionUnit,
temp.DateTime AS DateTime,
s.Reference AS Shift,
CONVERT(TIME, temp.DateTime) AS Time,
CONVERT(DATE, temp.DateTime - ISNULL((SELECT CAST(MIN(s_first.FromTimeOfDay) AS DateTime) FROM Shift s_first WHERE s_first.FromDay = s.FromDay AND s_first.ShiftCalendarID = s.ShiftCalendarID), CAST('6:00' AS DateTime))) AS ProductionDate,
temp.ScrapReason AS ScrapReason,
temp.Quantity AS ScrapQuantity,
'Manually Registered' AS RegistrationType
FROM (SELECT
CAST(SUM(sreg.ScrapQuantity) AS int) AS Quantity,
sreas.Name As ScrapReason,
DATEADD(MINUTE, 30 * (DATEPART(MINUTE, sreg.ScrapTime) / 30), DATEADD(HOUR, DATEDIFF(HOUR, 0, sreg.ScrapTime), 0)) AS DateTime,
srer.EquipmentID AS EquipmentID
FROM qms.ScrapRegistration sreg WITH (NOLOCK)
INNER JOIN qms.ScrapReason sreas WITH (NOLOCK) ON sreas.ID = sreg.ScrapReasonID -- creating CTE of this table
INNER JOIN WorkRequest wr WITH (NOLOCK) ON wr.ID = sreg.WorkRequestID -- CREATE CTE OF THIS TABLE
INNER JOIN SegmentRequirementEquipmentRequirement srer WITH (NOLOCK) ON srer.SegmentRequirementID = wr.SegmentRequirementID -- CREATE CTE OF THIS TABLE
GROUP BY DATEADD(MINUTE, 30 * (DATEPART(MINUTE, sreg.ScrapTime) / 30), DATEADD(HOUR, DATEDIFF(HOUR, 0, sreg.ScrapTime), 0)), srer.EquipmentID, sreas.Name) temp
INNER JOIN Equipment e WITH (NOLOCK) ON e.ID = temp.EquipmentID -- CREATE CTE OF THIS TABLE
INNER JOIN ShiftCalendar sc WITH (NOLOCK) ON sc.ID = dbo.cfn_GetEquipmentShiftCalendarID(e.ID, temp.DateTime) -- CREATE CTE OF THIS TABLE
INNER JOIN Shift s WITH (NOLOCK) ON s.ID = dbo.cfn_GetShiftIDFromDateTime(temp.DateTime, sc.ID) -- CREATE CTE OF THIS TABLE
UNION
SELECT
e.Name AS ProductionUnit,
temp.DateTime AS DateTime,
s.Reference AS Shift,
CONVERT(TIME, temp.DateTime) AS Time,
CONVERT(DATE, temp.DateTime - ISNULL((SELECT CAST(MIN(s_first.FromTimeOfDay) AS DateTime) FROM Shift s_first WHERE s_first.FromDay = s.FromDay AND s_first.ShiftCalendarID = s.ShiftCalendarID), CAST('6:00' AS DateTime))) AS ProductionDate,
temp.ScrapReason AS ScrapReason,
temp.Quantity AS ScrapQuantity,
'Auto Registered' AS RegistrationType
FROM (SELECT
SUM(ISNULL(asr.ScrapQuantity, 0)) AS Quantity,
sreas.Name As ScrapReason,
DATEADD(MINUTE, 30 * (DATEPART(MINUTE, asr.ScrapTime) / 30), DATEADD(HOUR, DATEDIFF(HOUR, 0, asr.ScrapTime), 0)) AS DateTime,
srer.EquipmentID AS EquipmentID
FROM proj.AutoScrapRegistration asr WITH (NOLOCK)
INNER JOIN qms.ScrapReason sreas WITH (NOLOCK) ON sreas.ID = asr.ScrapReasonID
INNER JOIN WorkRequest wr WITH (NOLOCK) ON wr.ID = asr.WorkRequestID
INNER JOIN SegmentRequirementEquipmentRequirement srer WITH (NOLOCK) ON srer.SegmentRequirementID = wr.SegmentRequirementID
GROUP BY DATEADD(MINUTE, 30 * (DATEPART(MINUTE, asr.ScrapTime) / 30), DATEADD(HOUR, DATEDIFF(HOUR, 0, asr.ScrapTime), 0)), srer.EquipmentID, sreas.Name) temp
INNER JOIN Equipment e WITH (NOLOCK) ON e.ID = temp.EquipmentID
INNER JOIN ShiftCalendar sc WITH (NOLOCK) ON sc.ID = dbo.cfn_GetEquipmentShiftCalendarID(temp.EquipmentID, temp.DateTime) -- the function is called here
INNER JOIN Shift s WITH (NOLOCK) ON s.ID = dbo.cfn_GetShiftIDFromDateTime(temp.DateTime, sc.ID) -- the function is called here
i'm ignoring the union for now to try and get something simply working.
The functions are highlighted in this post How to conver this SQL server Function into a CTE in snowflake
Here is what i have so far:
WITH table_ScrapRegistration (
Quantity
,ScrapReason
,DATETIME
,EquipmentID
,ScrapReasonID
,WorkRequestID
,SegmentRequirementID
)
AS (
SELECT CAST(SUM(sreg.ScrapQuantity) AS INT) AS Quantity
,sreas.Name AS ScrapReason
,DATEADD(MIN, 30 * (DATE_PART(MINUTE, sreg.ScrapTime) / 30)::INT, date_trunc('HOUR', sreg.ScrapTime)) AS DATETIME
,srer.EquipmentID AS EquipmentID
,sreas.ID AS ScrapReasonID
,wr.ID AS WorkRequestID
,srer.SegmentRequirementID AS SegmentRequirementID
FROM DB_BI_DEV.RAW_CPMS_LAG.ScrapRegistration sreg
INNER JOIN DB_BI_DEV.RAW_CPMS_LAG.ScrapReason sreas ON sreas.ID = sreg.ScrapReasonID -- CREATE CTE OF THIS TABLE
INNER JOIN DB_BI_DEV.RAW_CPMS_LAG.WorkRequest wr ON wr.ID = sreg.WorkRequestID -- CREATE CTE OF THIS TABLE
INNER JOIN DB_BI_DEV.RAW_CPMS_LAG.SegmentRequirementEquipmentRequirement srer ON srer.SegmentRequirementID = wr.SegmentRequirementID -- CREATE CTE OF THIS TABLE
GROUP BY DATEADD(MIN, 30 * (DATE_PART(MINUTE, sreg.ScrapTime) / 30)::INT, date_trunc('HOUR', sreg.ScrapTime))
,srer.EquipmentID
,sreas.Name
,sreas.ID
,wr.ID
,srer.SegmentRequirementID
)
,table_scrapreason (
name
,ID
)
AS (
SELECT name
,ID
FROM DB_BI_DEV.RAW_CPMS_LAG.ScrapReason
)
,table_workrequest (
ID
,SegmentRequirementID
) -- this is from a join)
AS (
SELECT id
,SegmentRequirementID
FROM DB_BI_DEV.RAW_CPMS_LAG.WorkRequest
)
,table_SegmentRequirementEquipmentRequirement (
EquipmentID
,SegmentRequirementID
)
AS (
SELECT EquipmentID
,SegmentRequirementID
FROM DB_BI_DEV.RAW_CPMS_LAG.SegmentRequirementEquipmentRequirement
)
,table_equipment (
id
,name
,ParentEquipmentID
,ShiftCalendarEntityNumber
)
AS (
SELECT id
,name
,ParentEquipmentID
,ShiftCalendarEntityNumber
FROM DB_BI_DEV.RAW_CPMS_LAG.Equipment
)
,table_ShiftCalendar (
id,
entitynumber,
begindate,
enddate,
name,
PeriodInDays
)
AS (
SELECT id,
entitynumber,
begindate,
enddate,
name,
PeriodInDays
FROM DB_BI_DEV.RAW_CPMS_LAG.ShiftCalendar)
,table_shift (
ID
,Reference
,FromDay
)
AS -- this is from the temp table
(
SELECT ID
,Reference
,FromDay
FROM DB_BI_DEV.RAW_CPMS_LAG.shift
)
,temp_sub_select
AS (
SELECT sreg.Quantity AS Quantity
,sreas.name AS ScrapReason
,timeadd('minute', TRUNCATE (minute(sreg.DATETIME) / 30) * 30, date_trunc('hour', sreg.DATETIME)) AS DATETIME
,srer.EquipmentID AS EquipmentID
FROM table_ScrapRegistration sreg
INNER JOIN table_scrapreason sreas ON sreas.ID = sreg.ScrapReasonID -- CREATE CTE OF THIS TABLE
INNER JOIN table_workrequest wr ON wr.ID = sreg.WorkRequestID -- CREATE CTE OF THIS TABLE
INNER JOIN table_SegmentRequirementEquipmentRequirement srer ON srer.SegmentRequirementID = wr.SegmentRequirementID -- CREATE CTE OF THIS TABLE
GROUP BY sreg.Quantity
,sreas.name
,timeadd('minute', TRUNCATE (minute(sreg.DATETIME) / 30) * 30, date_trunc('hour', sreg.DATETIME))
,srer.EquipmentID
)
--select * from cte_GetEquipmentShiftCalendarID_part_a
--when i run this i get results
, cte_GetEquipmentShiftCalendarID_part_a
as (
WITH recursive rec_cte(id, parentequipmentid, shiftcalendarentitynumber) AS (
SELECT ID,
ParentEquipmentID,
ShiftCalendarEntityNumber
FROM table_equipment
UNION ALL
SELECT r.ID,
p.ParentEquipmentID,
p.ShiftCalendarEntityNumber
FROM rec_cte AS r
INNER JOIN table_equipment p ON p.ID = r.ParentEquipmentID
AND r.ShiftCalendarEntityNumber IS NULL
)
SELECT c.id,
sc.id AS shiftCalendarID,
sc.begindate,
sc.enddate
FROM rec_cte AS c
LEFT JOIN table_shiftcalendar AS sc ON sc.entitynumber = c.ShiftCalendarEntityNumber
WHERE shiftcalendarentitynumber IS NOT NULL
)
select * from cte_GetEquipmentShiftCalendarID_part_a
-- when i run this, i dont get any results.