为什么我得到 "A cursor with the name already exists"？

Question

我有这个触发器：

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

当我插入 table TDINCI

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

我得到一个错误：

A cursor with the name 'detailsCursor' already exists.

我打开

open detailsCursor;

并关闭游标。

close detailsCursor;
deallocate detailsCursor;

也许有一些我不管理的游标范围？提前致谢。

Answer 1

您正在使用每次调用此过程时都会定义的全局游标，并给您同样的错误。

定义一个本地游标。只需在 CURSOR:

后面加上关键字 LOCAL

declare detailsCursor CURSOR LOCAL FOR
...

为什么我得到 "A cursor with the name already exists"？

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

sql

sql-server

tsql

database-cursor