Execute as : Alter procedure « Procedure Function « SQL Server / T-SQL Tutorial

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SQL Server / T-SQL Tutorial » Procedure Function » Alter procedure 
21.10.4.Execute as
5>
6CREATE TABLE employee(
7>    id          INTEGER NOT NULL PRIMARY KEY,
8>    first_name  VARCHAR(10),
9>    last_name   VARCHAR(10),
10>    salary      DECIMAL(10,2),
11>    start_Date  DATETIME,
12>    region      VARCHAR(10),
13>    city        VARCHAR(20),
14>    managerid   INTEGER
15);
16> GO
1INSERT INTO employee VALUES (1'Jason' ,  'Martin', 5890,'2005-03-22','North','Vancouver',3);
2> GO
1INSERT INTO employee VALUES (2'Alison',  'Mathews',4789,'2003-07-21','South','Utown',4);
2> GO
1INSERT INTO employee VALUES (3'James' ,  'Smith',  6678,'2001-12-01','North','Paris',5);
2> GO
1INSERT INTO employee VALUES (4'Celia' ,  'Rice',   5567,'2006-03-03','South','London',6);
2> GO
1INSERT INTO employee VALUES (5'Robert',  'Black',  4467,'2004-07-02','East','Newton',7);
2> GO
1INSERT INTO employee VALUES (6'Linda' ,  'Green' , 6456,'2002-05-19','East','Calgary',8);
2> GO
1INSERT INTO employee VALUES (7'David' ,  'Larry',  5345,'2008-03-18','West','New York',9);
2> GO
1INSERT INTO employee VALUES (8'James' ,  'Cat',    4234,'2007-07-17','West','Regina',9);
2> GO
1INSERT INTO employee VALUES (9'Joan'  ,  'Act',    6123,'2001-04-16','North','Toronto',10);
2> GO
1>
2select from employee;
3> GO
id          first_name last_name  salary       start_Date              region     city                 managerid
----------- ---------- ---------- ------------ ----------------------- ---------- -------------------- -----------
          Jason      Martin          5890.00 2005-03-22 00:00:00.000 North      Vancouver                      3
          Alison     Mathews         4789.00 2003-07-21 00:00:00.000 South      Utown                          4
          James      Smith           6678.00 2001-12-01 00:00:00.000 North      Paris                          5
          Celia      Rice            5567.00 2006-03-03 00:00:00.000 South      London                         6
          Robert     Black           4467.00 2004-07-02 00:00:00.000 East       Newton                         7
          Linda      Green           6456.00 2002-05-19 00:00:00.000 East       Calgary                        8
          David      Larry           5345.00 2008-03-18 00:00:00.000 West       New York                       9
          James      Cat             4234.00 2007-07-17 00:00:00.000 West       Regina                         9
          Joan       Act             6123.00 2001-04-16 00:00:00.000 North      Toronto                       10
1>
2>
3>
4CREATE PROCEDURE dbo.usp_employee
5> @SchemaAndTable nvarchar(255)
6> AS
7> EXEC ('SELECT COUNT(*FROM ' + @SchemaAndTable)
8> GO
1>
2> EXEC dbo.usp_employee 'Employee'
3> GO

-----------
          9
1>
2> ALTER PROCEDURE dbo.usp_employee
3> @SchemaAndTable nvarchar(255)
4> WITH EXECUTE AS 'YourName'
5> AS
6> EXEC ('SELECT COUNT(*FROM ' + @SchemaAndTable)
7> GO
1>
2> drop procedure dbo.usp_employee
3> GO
1>
2> drop table employee;
3> GO
1>
21.10.Alter procedure
21.10.1.The syntax of the ALTER PROC statement
21.10.2.Modifying a Stored Procedure
21.10.3.ALTER PROC Statement Using WITH RECOMPILE
21.10.4.Execute as
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