SAS(R) 9.1.3 Companion for z/OS

Details
Functions and CALL Routines under z/OS FDELETE Function 257
DSNCATLGD returns a value of 1 if the filename is found in the z/OS system catalog,
and a value of 0 if the filename is not found in the catalog.
DSNCATLGD is similar to the FILEEXIST function, but there are some differences
that make DSNCATLGD the prefered function to use in some circumstances.
DSNCATLGD does not cause dynamic allocation to occur, which is useful for tape data
sets because it does not require that a tape be mounted.
When a batch job is creating a new z/OS data set, DSNCATLGD will not return a
value of 1 until the job step that creates the data set terminates. FILEEXIST, which
uses dynamic allocation to verify that the data set exists, returns a value of 1 anytime
after the start of the batch job that is creating the data set.
Note: z/OS enters a dynamically allocated data set into the system catalog
immediately at the time of the dynamic allocation request. This includes all allocations
made by TSO users. R
See Also
FCLOSE Function
“FILEEXIST Function” on page 259
Closes an external file, a directory, or a directory member
Category: External Files
z/OS specifics: file close is strongly recommended
See: FCLOSE Function in SAS Language Reference: Dictionary
Syntax
FCLOSE(file-id)
file-id
specifies the identifier that was assigned when the file was opened, generally by the
FOPEN function.
Details
Files opened with the FOPEN function are not closed automatically after processing.
All files that are opened with FOPEN should be closed with FCLOSE. For code
examples, see “FINFO Function” on page 261
See Also
FDELETE Function
3 “FOPEN Function” on page 265
Deletes an external file or an empty directory