Need to Add Another While in the below query - sql

Question

I've got the below code from one of the experts here in this forum (Which is working fine). So what I'm trying to do is to amend this query further to get the dates the same way but for all tasks. There is a table called "TASK" in the database and each task_id has a clndr_id and proj_id. The desired output would be (proj_id, task_id, clndr_id, date_Value), so I think we need to add another WHILE to get all dates for all tasks in the TASK table. I hope #CurseStacker or anyone else can help :)..thanks.
ALTER FUNCTION [dbo].[GetProjectDates]
(
#project_name varchar(50)
)
RETURNS #temp_tb TABLE([proj_id] int, [clndr_id] int , [date_value] date)
AS
BEGIN
-- Add the SELECT statement with parameter references here
DECLARE #project_id int
DECLARE #clndr_id int
DECLARE #walker int = 0
DECLARE #holder varchar(MAX)
DECLARE #date date
DECLARE #data varchar(MAX)
SELECT #project_id = [p].[proj_id]
,#clndr_id = [p].[clndr_id]
,#holder = [c].[clndr_data]
FROM [PMDB].[dbo].[PROJECT] AS [p]
INNER JOIN [PMDB].[dbo].[CALENDAR] AS [c] ON [p].[clndr_id] = [c].[clndr_id]
WHERE [p].[proj_short_name] = #project_name
WHILE #walker <> LEN(#holder) + 1
BEGIN
IF SUBSTRING(#holder, #walker, 2) = 'd|'
BEGIN
SET #data = SUBSTRING(#holder, #walker, 10)
IF SUBSTRING(#data, LEN(#data) - 2, 3) = ')()'
BEGIN
SET #date = DATEADD(D, CAST(SUBSTRING(#data, 3, 5) AS int) -2, '01/01/1900')
INSERT INTO #temp_tb VALUES (#project_id, #clndr_id, #date)
END
END
SET #walker = #walker + 1
END
RETURN
END
GO
So "TASK" table includes (proj_id, task_id, clndr_id) and from "Calendar" table we can get the clndr_data by linking to proj_id in task table (The above code gets the dates in clndr_data between 'd|' and ')()' for only one clndr_id, and it works fine' Now I need to do the same but for several calendars;
proj_id task_id clndr_id clndr_data
4917 310449 7143 (0||CalendarData()(.....
4917 310450 7144 (0||CalendarData()(.....
4917 310451 7149 (0||CalendarData()(.....
Desired Outcome (Assuming clndr_id 7143 has only 2 dates between 'd|' and ')()', clndr_id 7144 has 3 dates, and cldnr_id 7149 has two dates) JUST AN ASSUMPTION
proj_id task_id clndr_id date
4917 310449 7143 2018-09-24
4917 310449 7143 2018-09-25
4917 310450 7144 2018-09-26
4917 310450 7144 2018-10-01
4917 310450 7144 2018-10-02
4917 310451 7149 2018-10-03
4917 310451 7149 2018-10-04

Answer 1

try something like below:
ALTER FUNCTION [dbo].[GetProjectDates]
(
#project_name varchar(50)
)
RETURNS #temp_tb TABLE([proj_id] int, [task_id] int, [clndr_id] int , [date_value] date)
AS
BEGIN
-- Add the SELECT statement with parameter references here
DECLARE #project_id int
DECLARE #task_id int
DECLARE #clndr_id int
DECLARE #walker int = 0
DECLARE #holder varchar(MAX) = ''
DECLARE #date date
DECLARE #data varchar(MAX)
declare #tab table (project_id int, task_id int, clndr_id int, holder varchar(max))
insert into #tab
SELECT [T].[proj_id] as project_id
,[T].[task_id] as task_id
,[c].[clndr_id] as clndr_id
,[c].[clndr_data] as holder
FROM [PMDB].[dbo].[TASK] as [T]
INNER JOIN [PMDB].[dbo].[CALENDAR] AS [c] ON [T].[clndr_id] = [c].[clndr_id] and [T].[Proj_id] = [c].[proj_id]
WHERE [T].[proj_id] = (select proj_id FROM [PMDB].[dbo].[PROJECT] where [proj_short_name] = #project_name)
declare #cur_task int, #cur_clndr int
set #cur_task = (select top 1 task_id from #tab)
set #cur_clndr = (select top 1 clndr_id from #tab where task_id = #task_id)
set #holder = (select top 1 holder from #tab where task_id = #task_id)
while ((select count(1) from #tab) > 0)
begin
print 'Current loop running for Task_Id' + convert(varchar(10), #cur_task)
WHILE #walker <> LEN(#holder) + 1
BEGIN
IF SUBSTRING(#holder, #walker, 2) = 'd|'
BEGIN
SET #data = SUBSTRING(#holder, #walker, 10)
IF SUBSTRING(#data, LEN(#data) - 2, 3) = ')()'
BEGIN
SET #date = DATEADD(D, CAST(SUBSTRING(#data, 3, 5) AS int) -2, '01/01/1900')
INSERT INTO #temp_tb VALUES (#project_id, #task_id, #clndr_id, #date)
END
END
SET #walker = #walker + 1
END
delete #tab where task_id = #cur_task
set #cur_task = (select top 1 task_id from #tab)
set #cur_clndr = (select top 1 clndr_id from #tab where task_id = #task_id)
set #holder = (select top 1 holder from #tab where task_id = #task_id)
set #walker = 0
end
RETURN
END