SET NOEXEC (Transact-SQL)
编译每个查询但不执行查询。
语法
SET NOEXEC { ON | OFF }
备注
当 SET NOEXEC 为 ON 时,SQL Server 2005 将编译每一批处理 Transact-SQL 语句但并不执行它们。当 SET NOEXEC 设置为 OFF 时,所有批处理将在编译后执行。
SQL Server 中的语句执行包含两个阶段:编译和执行。该设置可用于让 SQL Server 在执行 Transact-SQL 代码时,验证代码中的语法和对象名。它也可以用于调试通常是较大的批处理中的部分语句。
SET NOEXEC 设置是在执行或运行时设置,而不是在分析时设置。
权限
要求具有 public 角色的成员资格。
示例
下面的示例在有效查询、含有无效对象名的查询以及含有不正确语法的查询中使用 NOEXEC
。
USE AdventureWorks;
GO
PRINT 'Valid query';
GO
-- SET NOEXEC to ON.
SET NOEXEC ON;
GO
-- Inner join.
SELECT e.EmployeeID, e.Title, v.Name
FROM HumanResources.Employee e
INNER JOIN Purchasing.PurchaseOrderHeader poh
ON e.EmployeeID = poh.EmployeeID
INNER JOIN Purchasing.Vendor v
ON poh.VendorID = v.VendorID;
GO
-- SET NOEXEC to OFF.
SET NOEXEC OFF;
GO
PRINT 'Invalid object name';
GO
-- SET NOEXEC to ON.
SET NOEXEC ON;
GO
-- Function name used is a reserved keyword.
USE AdventureWorks;
GO
CREATE FUNCTION dbo.Values(@EmployeeID INT)
RETURNS TABLE
AS
RETURN (SELECT PurchaseOrderID, TotalDue
FROM dbo.PurchaseOrderHeader
WHERE EmployeeID = @EmployeeID)
-- SET NOEXEC to OFF.
SET NOEXEC OFF
GO
PRINT 'Invalid syntax';
GO
-- SET NOEXEC to ON.
SET NOEXEC ON;
GO
-- Built-in function incorrectly invoked
SELECT *
FROM fn_helpcollations;
-- Reset SET NOEXEC to OFF.
SET NOEXEC OFF;
GO
请参阅
参考
SET (Transact-SQL)
SET SHOWPLAN_ALL (Transact-SQL)
SET SHOWPLAN_TEXT (Transact-SQL)