SQL Server 存储过程/游标

Question

我有一个包含 20 个空间表 (Zoom1-Zoom20) 的列表，并且有时会在这些表中弹出无效的几何图形。当出现无效几何时，我运行以下语句来查找无效几何的位置：

SELECT ID FROM Zoom10 WhERE Location.STIsValid() = 0

通常我必须为每个缩放表运行上述语句（导致无效几何图形的错误并不指示哪个缩放表具有无效几何图形），当从 select 语句返回结果时，我运行以下语句修正几何：

UPDATE MGeoZoom10 set Location = Location.MakeValid() where Location.STIsValid() = 0

我的问题是这个过程是否可以通过获取缩放表列表的存储过程自动化

select name from sys.tables where name like '%zoom'

然后使用

循环浏览缩放表

SELECT ID FROM Zoom10 WhERE Location.STIsValid() = 0

如果返回结果，它会在缩放表上运行更新语句？

Answer 1

试试这个：

sp_msforeachtable '
if ''?'' Like ''%Zoom%'' 
    Begin
        If Exists(SELECT ID FROM ? WhERE Location.STIsValid() = 0)
            UPDATE ? set Location = Location.MakeValid() where Location.STIsValid() = 0
    End     
'

Answer 2

您是否有 2 个名为 STIValid 和 MakeValid 的 UDF？如果是这样，你可以做这样的事情......

    SELECT id INTO #Processed FROM Sysobjects WHERE name = '(no such table)'

    DECLARE @TableId int, @TableName varchar(255), @CorrectionSQL varchar(255)

    SELECT @TableId = MIN(id) FROM Sysobjects WHERE type = 'U' AND name LIKE '%zoom'
    AND id NOT IN (SELECT id FROM #Processed)

    SET @TableId = ISNULL(@TableId, -1)

    WHILE @TableId > -1 BEGIN

        PRINT @TableId

        SELECT @TableName = name FROM Sysobjects WHERE type = 'U' AND id = @TableId
        SET @CorrectionSQL = 'UPDATE ' + @TableName + ' SET Location = dbo.MakeValid(Location) where dbo.STIsValid(Location) = 0'

        PRINT @CorrectionSQL
        EXEC(@CorrectionSQL)


        INSERT INTO #Processed (id) VALUES(@TableId)

        SELECT @TableId = MIN(id) FROM Sysobjects WHERE type = 'U' AND name IN ('DimAccount', 'DimCurrency', 'DimCustomer')
            AND id NOT IN (SELECT id FROM #Processed)

    END