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CURRENT_USER (Transact-SQL)

 

THIS TOPIC APPLIES TO: yesSQL Server (starting with 2008)yesAzure SQL DatabaseyesAzure SQL Data Warehouse yesParallel Data Warehouse

Returns the name of the current user. This function is equivalent to USER_NAME().

Topic link icon Transact-SQL Syntax Conventions

  
CURRENT_USER  

-- Azure SQL Data Warehouse and Parallel Data Warehouse  
CURRENT_USER  

sysname

CURRENT_USER returns the name of the current security context. If CURRENT_USER is executed after a call to EXECUTE AS switches context, CURRENT_USER will return the name of the impersonated context. If a Windows principal accessed the database by way of membership in a group, the name of the Windows principal will be returned instead of the name of the group.

To return the login of the current user, see SUSER_NAME (Transact-SQL) and SYSTEM_USER (Transact-SQL).

A. Using CURRENT_USER to return the current user name

The following example returns the name of the current user.

SELECT CURRENT_USER;  
GO  

B. Using CURRENT_USER as a DEFAULT constraint

The following example creates a table that uses CURRENT_USER as a DEFAULT constraint for the order_person column on a sales row.

USE AdventureWorks2012;  
GO  
IF EXISTS (SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES  
      WHERE TABLE_NAME = 'orders22')  
   DROP TABLE orders22;  
GO  
SET NOCOUNT ON;  
CREATE TABLE orders22  
(  
 order_id int IDENTITY(1000, 1) NOT NULL,  
 cust_id  int NOT NULL,  
 order_date smalldatetime NOT NULL DEFAULT GETDATE(),  
 order_amt money NOT NULL,  
 order_person char(30) NOT NULL DEFAULT CURRENT_USER  
);  
GO  

The following code inserts a record in the table. The user that is executing these statements is named Wanida.

INSERT orders22 (cust_id, order_amt)  
VALUES (5105, 577.95);  
GO  
SET NOCOUNT OFF;  
GO  

The following query selects all information from the orders22 table.

SELECT * FROM orders22;  
GO  

Here is the result set.

order_id cust_id order_date order_amt order_person

----------- ----------- -------------------- ------------ ------------

1000 5105 2005-04-03 23:34:00 577.95 Wanida

(1 row(s) affected)

C. Using CURRENT_USER from an impersonated context

In the following example, user Wanida executes the following Transact-SQL code.

SELECT CURRENT_USER;  
GO  
EXECUTE AS USER = 'Arnalfo';  
GO  
SELECT CURRENT_USER;  
GO  
REVERT;  
GO  
SELECT CURRENT_USER;  
GO  

Here is the result set.

Wanida

Arnalfo

Wanida

D: Using CURRENT_USER to return the current user name

The following example returns the name of the current user.

SELECT CURRENT_USER;  

USER_NAME (Transact-SQL)
SYSTEM_USER (Transact-SQL)
sys.database_principals (Transact-SQL)
ALTER TABLE (Transact-SQL)
CREATE TABLE (Transact-SQL)
System Functions (Transact-SQL)

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