execute as

If the EXECUTE AS statement has been used to switch context, SYSTEM_USER returns the name of the impersonated context.

The execution context of a session or module can be explicitly changed by specifying a user or login name in an EXECUTE AS statement.

The ownership of the module cannot be changed to a group or role when the module specifies EXECUTE AS OWNER and has an explicit owner.

It is conceptually like an island of code that will execute as it would have in 1. 0, with very few exceptions.

If CURRENT_USER is executed after a call to EXECUTE AS switches context, CURRENT_USER will return the name of the impersonated context.

Some functions that return the identity of the user return the user specified in the EXECUTE AS clause, not the original caller.

When specified as a standalone statement, REVERT applies to EXECUTE AS statements defined within a batch or session.

A set of statements that execute as a unit are said to be atomic.

Switches the execution context back to the caller of the last EXECUTE AS statement.

On a multiprocessor computer, the system can simultaneously execute as many threads as there are processors on the computer.

EXECUTE AS CALLER specifies that the statements inside the module are executed in the context of the caller of the module.

To test your image, you can also invoke BusyBox with a command to execute, as shown in Listing 6.

Unlike the EXECUTE AS clause, it does not change the execution context of the procedure.

EXECUTE AS SELF is equivalent to EXECUTE AS user_name, where the specified user is the person creating or modifying the module.

EXECUTE AS cannot be specified for inline user-defined functions.

EXECUTE AS user_name, specifies the statements inside the module execute in the context of the user specified in user_name.

EXECUTE AS OWNER specifies the statements inside the module executes in the context of the current owner of the module.

A transaction consists of a single command or a group of commands that execute as a package.

When no execution context is specified, or EXECUTE AS CALLER is specified, IMPERSONATE permissions are not required.

Consider the case in which a user explicitly switches context at the server-level using the EXECUTE AS LOGIN statement.

You can create an execution context stack by calling the EXECUTE AS statement multiple times across multiple principals.

Right-click your DB Activity Report, and click Execute, as shown in Figure 26.

For more information about implicit context switching, see Using EXECUTE AS in Modules.

You want the statements in the module to execute as the calling user.

Specifies the cookie that was created in a corresponding EXECUTE AS stand-alone statement.

The application should execute, as shown in Figure 30.

Moreover, you should create rules to execute as independently as possible, such that only one rule is needed to perform a defined action.

You can also provide a file containing commands to execute as an argument if you do not want to execute.

Locate the install image and execute as follows, choosing the default values on all the screens.

Malicious modules that are defined to execute as high privileged users.

The module is marked EXECUTE AS USER or SELF, and the module owner has the corresponding permissions on the referenced object.

For more information, see Extending Database Impersonation by Using EXECUTE AS.

When specified inside a module, REVERT is applicable only to EXECUTE AS statements defined in the module.

This can be emulated by switching user context by using EXECUTE AS.

You can use EXECUTE AS to temporarily switch to the security context of the caller.

Describes how to use EXECUTE AS to extend user impersonation beyond the scope of the current database.

In effect, Beria's "question" was for approval to summarily execute as many as 34, 000 Polish prisoners of war.

Compiled methods loaded from JXEs execute as native code.

Describes how to define custom permission sets using EXECUTE AS inside a module.

Using EXECUTE AS with a login-less user is more secure because it is permission-based, not password-based.

The module is marked EXECUTE AS CALLER, and you have the corresponding permissions on the object.

You have two ways of allowing a user to switch contexts within a database: SETUSER or EXECUTE AS.

Describes how to use EXECUTE AS inside modules such as stored procedures, triggers, queues, and user-defined functions.

What we practice now will pay dividends in the future when we train or when we actually execute as a coalition air force.

For example, the following stored procedure issues an EXECUTE AS statement followed by a REVERT statement.

Using EXECUTE AS to explicitly impersonate another user is similar to SETUSER in earlier versions of SQL Server.

For example, two concurrent queries, Q1 and Q2, execute as user-defined functions that acquire 10MB and 20MB of memory respectively.

She specifies EXECUTE AS CALLER in the CREATE PROCEDURE statement, as shown in this example

If the signature is verified, the context established by the EXECUTE AS clause in the module has the certificate

extended database impersonation by using execute as

Execute as command and return results

Using EXECUTE AS to Create Custom Permission Sets

So the final command line will execute as

Use EXECUTE AS OWNER in the following scenario

Use EXECUTE AS SELF in the following scenarios

For example, assume that two batches execute as follows