Sas file locks

DATA and the other on libref. This argument is optional. For details about releasing locks, see Clearing an Explicit Lock. Locking a library prevents other users from reading, updating, or deleting existing SAS files in the library or from creating new SAS files in the library.

The lock also prevents other users from obtaining a list of files in the library. All these statements are equivalent. Beginning with SAS 6. Therefore, when you execute the LOCK statement on one of these data sets, both of them are automatically locked. VIEW concurrently. Locking a member of type CATALOG prevents other users from creating, deleting, or renaming the catalog, or listing the entries in the catalog. It also prevents creating, reading, updating, deleting, or renaming any of the entries in the catalog by other users.

While your SAS catalog or catalogs are locked, you can update an application that uses many different catalog entries. For example, you can execute LOCK statements to ensure exclusive access to the catalogs that contain your application's entries. This ensures that no other users are executing your application while you are updating its entries. This allows other users to gain access to your catalogs and to execute your application.

For more information, see Clearing an Explicit Lock. Locking an entry in a catalog prevents other users from creating, reading, updating, or deleting that entry. How you clear an explicit lock depends on the level in the data object hierarchy at which the lock was obtained. There are three ways to clear locks. Each is explained in detail in the sections that follow. Explicitly lock lower-level data objects and unlock the higher-level data objects, which implicitly unlocks its lower-level objects.

Including the LOCK statement provides protection for the multistep program by acquiring exclusive access to the file. Opens MyData. Census to remove observations. At the end of the DATA step, the file is closed. No other operation in the current SAS session can access the file. However, until the file is reopened, it can be accessed by another SAS session. Census to sort the file. At the end of the procedure, the file is closed, which means that no other operation in the current SAS session can access the file, but the file can be accessed by another SAS session.

Census to rebuild the file's index. At the end of the procedure, the file is closed. Releases the exclusive lock on MyData. Global Statements by Category. Comment Statement. Learn more. Choose Your Journey. Learn the difference between classical and Bayesian statistical approaches and see a few PROC examples to perform Bayesian analysis in this video.

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Posted AM views. Thanks Reanesh. Posted AM views In reply to Reaensh. Hi, Thanks for the reply.