SAS(R) 9.1.3 Companion for z/OS

584 Write Function Appendix 1
Figure A1.8 Concatenation FRCB
R1
+0
+4
+8
+12
+16
* +20
Concatenation
function
(CONCFUNC):16
Pointer to User Exit
BAG Control Block
(CONCEXIT)
Next Data Set
Block Size
(CONBLKL)
Next Data Set
Record Size
(CONCRECL)
Next Data Set
Record Format
(CONCRECF)
Pointer to User
Maximum Data Size
(CONCZLEN)
* The user exit can update this field.
UEBCB
Fullword
In this function you can modify the maximum data size for the next data set by
changing the Pointer to User Maximum Data Size so that it points to a fullword that
you initialize.
Write Function
SAS invokes the Write function during the execution of the PUT statement
whenever a new record must be written to the file. The following figure illustrates the
Write FRCB and its relationship to other control blocks:
Figure A1.9 Write FRCB
R1
*
*
+0
+4
+8
+12
Write Function
(WRITFUNC):14
Pointer to User Exit
BAG Control Block
(WRITEXIT)
Pointer to User
Record Area Address
(WRITRECA)
Pointer to
Record Size
(WRITRECL)
* The user exit can update this field.
UEBCB
Record
Address
Fullword
Record
When the Write function receives control, the WRITRECA field (or Pointer to User
Record Area Address) points to a Record Address. The Record buffer is allocated by
SAS and contains the record that was created by the PUT statement.