Why do I get "A cursor with the name already exists"?

I have this trigger:

CREATE TRIGGER CHECKINGMAXQTYDAYSVACANCY
    ON TDINCI
AFTER INSERT 
AS
    DECLARE
        @incidentCode int,
        @dateStart datetime,
        @dateEnd datetime,
        @daysAccumulated int,
        @maxDaysAvailable int

    set @daysAccumulated = 0;

    select @incidentCode = CO_INCI from inserted;
    select @maxDaysAvailable = IN_DIAS_GANA from TCINCI
        where CO_INCI = @incidentCode;

    declare detailsCursor CURSOR FOR
        select FE_INIC, FE_FINA from TDINCI
        where CO_INCI = @incidentCode;

    open detailsCursor;

    if CURSOR_STATUS('variable', 'detailsCursor') >= 0
    begin
        fetch next from detailsCursor
            into @dateStart, @dateEnd;

        while @@FETCH_STATUS = 0
        begin
            set @daysAccumulated = @daysAccumulated + (DATEDIFF(DAY, @dateStart, @dateEnd) + 1);

            fetch next from detailsCursor
            into @dateStart, @dateEnd;
        end
        close detailsCursor;
        deallocate detailsCursor;
    end
    IF(@maxDaysAvailable > @daysAccumulated)
    BEGIN
        RAISERROR ('No se pueden ingresar mas dias de los programados en la cabecera de incidencias.', 16, 1);
        ROLLBACK TRANSACTION;
        RETURN 
    END
GO

When I do a Insert to the table TDINCI

INSERT INTO TDINCI 
VALUES (1, '20150101', '20150115', '2015-2015')

I get an error:

A cursor with the name 'detailsCursor' already exists.

I open

open detailsCursor;

and close the cursor.

close detailsCursor;
deallocate detailsCursor;

Maybe there is something with the scope of cursor that I don't manage? Thanks in advance.

Solution 1:

You are using global cursor that will be defined each time you are calling this procedure and give you the same error.

Define a local cursor. Just put the keyword LOCAL after CURSOR:

declare detailsCursor CURSOR LOCAL FOR
...