"Varying" in a cursor data type parameter

• jorge_vicente

  SSC Eights!

  Points: 983

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  November 29, 2016 at 4:10 pm

  #316215

  Hi!

  I am not sure if this question has to go here, I wait don't mistake!

  I was doing tests for the 70-461 exam, and I have a doubt about parameters.

  The question says: "What are the two characterisits of a cursor data type parameter?"

  And one answer of them is " It must be used with the VARYING keyword"

  I don't understand when you have to use the "VARYING" keyword and neither what is the meaning of this.

  I tried to look for in google, I found very little explanations and I want to understand this.

  Could someone help me?

  Regards and thanks!:-)

• mister.magoo

  SSC-Forever

  Points: 47174

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  November 29, 2016 at 5:28 pm

  #1915068

  Sure, step 1 is Google "CREATE PROC" and that takes you to this page: https://msdn.microsoft.com/en-us/library/ms187926.aspx#Parameters

  Then hit CTRL-F and enter "VARYING" in the search.

  Somewhere shortly below you will see this explanation:

  H. Using an OUTPUT cursor parameter

  The following example uses the OUTPUT cursor parameter to pass a cursor that is local to a procedure back to the calling batch, procedure, or trigger.

  First, create the procedure that declares and then opens a cursor on the Currency table:

  IF OBJECT_ID ( 'dbo.uspCurrencyCursor', 'P' ) IS NOT NULL

  DROP PROCEDURE dbo.uspCurrencyCursor;

  GO

  CREATE PROCEDURE dbo.uspCurrencyCursor

  @CurrencyCursor CURSOR VARYING OUTPUT

  AS

  SET NOCOUNT ON;

  SET @CurrencyCursor = CURSOR

  FORWARD_ONLY STATIC FOR

  SELECT CurrencyCode, Name

  FROM Sales.Currency;

  OPEN @CurrencyCursor;

  GO

  Next, run a batch that declares a local cursor variable, executes the procedure to assign the cursor to the local variable, and then fetches the rows from the cursor.

  DECLARE @MyCursor CURSOR;

  EXEC dbo.uspCurrencyCursor @CurrencyCursor = @MyCursor OUTPUT;

  WHILE (@@FETCH_STATUS = 0)

  BEGIN;

  FETCH NEXT FROM @MyCursor;

  END;

  CLOSE @MyCursor;

  DEALLOCATE @MyCursor;

  GO

  MM
  

  ---

  
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