| Data Set Options under z/OS |
Specifies the initial disposition for a sequential access bound
SAS library.
| Valid in: |
DATA step and PROC steps
|
| Default: |
OLD
|
| Engines: |
V9TAPE, V8TAPE, V7TAPE, V6TAPE, V5TAPE
|
| z/OS specifics: |
all
|
-
NEW
-
specifies that the sequential library is
to be considered empty. SAS therefore does not look for previously written
members. The DATA step writes the new member at the beginning of the new (empty)
library. Any members that existed in the library before the write operation
are lost. The FILEDISP=NEW option can be valid only during the first write
to a sequential library for a given libref. For all subsequent writes to that
libref, FILEDISP=NEW is ignored and FILEDISP=OLD is assumed.
-
OLD
-
specifies that the sequential library is
not initially empty. SAS therefore writes members with names that do not already
exist in the library at the end of the library. If the member being written
has a name that already exists in the library, the existing member is overwritten,
and any members that follow the overwritten member are lost.
A sequential library is a single SAS file
that can contain one or more concatenated members.
To avoid inadvertent data loss, make sure that you specify
FILEDISP=NEW only when writing to new (empty) sequential libraries. Also,
when writing to an existing sequential library, make sure that the name of
the member being written does not inadvertently correspond to the name of
a member that already exists in the library.
Copyright © 2009 by SAS Institute Inc., Cary, NC, USA. All rights reserved.
