如何檢查某個索引是否存在於另一個模式中的表中？

Question

從這個激勵了Question

我創造了這個過程：

CREATE PROCEDURE [dbo].[dropIndexWithSchema](@schemaName VARCHAR(200), @tableName VARCHAR(200), @indexName VARCHAR(200)) 
AS 
BEGIN 
    DECLARE @sql nvarchar(512) 

    IF EXISTS (SELECT i.* FROM @schemaName.sys.indexes i WHERE i.name = @indexName AND i.object_id = OBJECT_ID(@schemaName + '.dbo.' + @tableName)) 
    BEGIN 
     SELECT @sql = 'DROP INDEX ' + @indexName + ' ON ' + @schemaName + '.dbo.' + @tableName; 
     EXEC sp_executesql @sql 
    END 
END 
GO 

當然，這並不如@schemaName在工作FROM子句是不能夠被parametrised。還有構建OBJECT_ID函數的對象名稱的問題。

我想編寫一個過程，從模式A，將能夠刪除模式B中的表上的索引，如果它存在。

Answer 1

嘗試

CREATE PROCEDURE [dbo].[dropIndexWithSchema](@schemaName VARCHAR(200), @tableName VARCHAR(200), @indexName VARCHAR(200)) 
AS 
BEGIN 
    DECLARE @sql nvarchar(512) 
    DECLARE @query NVARCHAR(MAX) = 'SELECT i.* FROM ' + @schemaName+'.sys.indexes i WHERE i.name = '''+@indexName+''' AND i.object_id = OBJECT_ID('''+@schemaName + '.dbo.' + @tableName+''')' 
    EXEC sp_executesql @query 
    IF (@@rowcount > 0) 
    BEGIN 
     SELECT @sql = 'DROP INDEX ' + @indexName + ' ON ' + @schemaName + '.dbo.' + @tableName; 
     EXEC sp_executesql @sql 
    END 
END 
GO