Resume a WHILE loop from where it stopped SQL - sql-server

Question

I have a while loop query that I only want to run until 11PM everyday - I'm aware this can be achieved with a WAITFOR statement, and then just END the query.
However, on the following day, once I re-run my query, I want it to continue from where it stopped on the last run. So I'm thinking of creating a log table that will contain the last processed ID.
How can I achieve this?
DECLARE #MAX_Value BIGINT = ( SELECT MAX(ID) FROM dbo.TableA )
DECLARE #MIN_Value BIGINT = ( SELECT MIN(ID) FROM dbo.TableA )
WHILE (#MIN_Value < #MAX_Value )
BEGIN
INSERT INTO dbo.MyResults
/* Do some processing*/
….
….
….
SET #MIN_Value = MIN_Value + 1
/*I only want the above processing to run until 11PM*/
/* Once it’s 11PM, I want to save the last used #MIN_Value
into my LoggingTable (dbo.Logging) and kill the above processing.*/
/* Once I re-run the query I want my processing to restart from the
above #MIN_Value which is recorded in dbo.Logging */
END

Answer 1

Disclaimer: I do not recommend using WHILE loops in SQL Server but considering the comment that you want a solution in SQL, here you go:
-- First of all, I strongly recommend using a different way of assigning variable values to avoid scenarios with the variable being NULL when the table is empty, also you can do it in a single select.
-- Also, if something started running at 10:59:59 it will let the processing for the value finish and will not simply rollback at 11.
CREATE TABLE dbo.ProcessingValueLog (
LogEntryId BIGINT IDENTITY(1,1) NOT NULL,
LastUsedValue BIGINT NOT NULL,
LastUsedDateTime DATETIME NOT NULL DEFAULT(GETDATE()),
CompletedProcessing BIT NOT NULL DEFAULT(0)
)
DECLARE #MAX_Value BIGINT = 0;
DECLARE #MIN_Value BIGINT = 0;
SELECT
#MIN_Value = MIN(ID),
#MAX_Value = MAX(ID)
FROM
dbo.TableA
SELECT TOP 1
#MIN_Value = LastUsedValue
FROM
dbo.ProcessingValueLog
WHERE
CompletedProcessing = 1
ORDER BY
LastUsedDateTime DESC
DECLARE #CurrentHour TINYINT = HOUR(GETDATE());
DECLARE #LogEntryID BIGINT;
WHILE (#MIN_Value < #MAX_Value AND #CurrentHour < 23)
BEGIN
INSERT INTO dbo.ProcessingValueLog (LastUsedValue)
VALUE(#MIN_Value)
SELECT #LogEntryID = SCOPE_IDENTITY()
// Do some processing...
SET #MIN_Value = #MIN_Value + 1;
UPDATE dbo.ProcessingValueLog
SET CompletedProcessing = 1
WHERE LogEntryId = #LogEntryID
SET #CurrentHour = HOUR(GETDATE())
END