Question

I am creating a email queue to handle email sending. From that queue I’m taking X number of records and send emails according to the type field of the records.

For that I have declared a table inside the stored procedure. When X number of records are taken I am setting the status of the record in the EmailQ table to processing. But after sending X number of records which is now inside the declared table has to be deleted.

For that I can use Delete but there is this TRUNCATE to delete all the records in the table. But the declared table has not identified as a Table.

WHILE EXISTS ( SELECT * FROM emailQ WHERE Status != 3)
BEGIN
  CREATE PROCEDURE [dbo].[SendMails]
  DECLARE @Temp TABLE (......)
  --Declare all the necessary variables

  INSERT INTO @Temp SELECT TOP 10
  WITH (UPDLOCK, HOLDLOCK)

  --Update the email queue table status of selected set of records in to the @Temp

  DECLARE  dataSet CURSOR FORWARD_ONLY FOR (SELECT.......  FROM @Temp)
  OPEN dataSet
  FETCH NEXT FROM dataSet INTO...

  WHILE @@FETCH_STATUS = 0
  BEGIN
    --send mails acordingly
  END

  CLOSE dataSet
  DEALLOCATE dataSet

  --Update the email queue table status of completed set of records in to the @Temp

  WAITFOR DELAY...
  TRUNCATE @Temp// This is where this Temp table is not identified as a table(It says     "Incorrect sintax... Expecting a table")

 END

What is the most appropriate way to delete the records from this declared table.
I also appreciate the comments on my way of handling the mail sending.

Thanks.

Answer 1

You should do it with delete

DELETE FROM @Temp

Check related question

SQL Server, temporary tables with truncate vs table variable with delete

More on Truncate and Temp Tables

TRUNCATE TABLE

Should I use a #temp table or a @table variable?

UPDATE:

Truncate table won’t work with declared table variable. You should use #Temp table instead or deleting rows instead of trancating. Check related question for more info.

UPDATE 2:

Great answer by Martin Smith

What’s the difference between a temp table and table variable in SQL Server?