我在SQL Server 2008 R2中有一个查询,如下所示,当我执行这个查询时,它一直在运行......如何调试以找出这段代码出了什么问题?任何帮助想法请。 :)为什么我的SQL Server 2008查询继续运行?
DECLARE @RESULT TABLE (
priority int,
partcode nvarchar(50),
orderqty int,
allocateqty int)
DECLARE @ORDER TABLE(
priority int,
partcode nvarchar(50),
orderqty int)
DECLARE @STOCK TABLE(
partcode nvarchar(50),
stockqty int)
INSERT INTO @ORDER (priority,partcode,orderqty)
VALUES(1,'A',10),
(2,'A',40);
INSERT INTO @STOCK(partcode,stockqty)
VALUES('A',22);
IF (SELECT SUM(orderqty)FROM @ORDER)<(SELECT stockqty FROM @STOCK)
BEGIN
INSERT INTO @RESULT(priority,partcode,orderqty,allocateqty)
SELECT priority, partcode,orderqty,orderqty
FROM @ORDER
END
ELSE
BEGIN
DECLARE @allocatedqty int = 0
DECLARE @allocateqty int = 1
DECLARE @runningstock int = (SELECT stockqty FROM @stock)
WHILE @runningstock>=0
BEGIN
DECLARE @priority int
SELECT TOP 1 @priority = priority FROM @order ORDER BY priority ASC
WHILE @priority <= (SELECT MAX(priority) FROM @order)
BEGIN
DECLARE @orderqty int
SELECT @orderqty = orderqty - @allocatedqty FROM @order WHERE priority = @priority
SELECT @allocateqty = CASE WHEN @runningstock > 0 AND @orderqty > 0 THEN @allocateqty ELSE 0 END
INSERT INTO @RESULT(priority,partcode,orderqty,allocateqty)
SELECT @priority,
partcode,
CASE WHEN @orderqty >= 0 THEN @orderqty ELSE 0 END AS orderqty,
@allocateqty
FROM @order
WHERE priority = @priority
SET @priority += 1
SET @runningstock = @runningstock - @allocateqty
END
SET @allocatedqty += @allocateqty
IF (@runningstock <= 0) BREAK
END
END;
SELECT priority,partcode,SUM(allocateqty) AS [allocateqty]
FROM @Result
GROUP BY priority,partcode
尝试'@priority'='@priority'+ 1在你的while块的末尾(不含引号),不知道这是否是问题,但这是我如何写增量,我从来没有任何问题到目前为止 –
@Jeremy C.我试过了,但没有帮助。如果我在这种情况下设置股票= 20,它运行平稳。 – Sokea
您需要检查@runningstock的值,该值确定正在完成的循环的数量,如果它是一个大数字,那么将查询长时间运行非常合理。您可能需要优化查询。否则,你可以确定某处存在死锁。 –