CA Dynam for VSE User Guide

Dynamic File Sorting
Control characters for DTFPR (printer) files are inserted if not present, and
control characters for DTFCD (punch) files are removed if present. CA
Dynam/FI only supports printer files using ASA or machine control characters.
When the simulation is invoked for files not conforming to this rule,
unpredictable results occur.
The LIOCS functions provided by the CNTRL and PRTOV macros are not
supported. Therefore, programs which depend upon CNTRL and PRTOV
support cannot use this simulation. (This includes the COBOL 'EOP' condition.)
DTFCPs that use system logical units, and process unit record I/O, can
normally be processed by CA Dynam/FI; DTFCPs that use programmer logical
units, such as SYS001, cannot. This means that compiler and Assembler work
files may not be processed by CA Dynam/FI.
Dynamic File Sorting
Dynamic file sorting lets you sort records on input or output while
manipulating/processing them in a user program written in Assembler, COBOL,
and so on. CA Dynam/FI does this by interfacing with CA SRAM (Sort
Reentrant Access Method). The procedure is transparent to the user program
since all CA SRAM specifications are made on the DLBL or TLBL rather than
within the program. CA Dynam/FI sends information to CA SRAM to define how
files are to be sorted, and intercepts the records at GETs and PUTs for CA
SRAM calls.
For this facility to work, both CA Dynam/FI and CA SRAM must be active and
supported. The Programming Guide explains how this is done. For more
information, see the DYNAM/FI installation option record.
On the DLBL or TLBL statement, indicate whether you are sorting on input
(SORTIN) or on output (SORTOUT) and what sort key fields are to be used.
The sort key field(s) may be defined on the xLBL statement or may reside in
the Catalog as a sort key name (SKNAME). A cataloged sort key name
provides greater flexibility:
• Different files may use the same sort key.
• A larger number of CA SRAM options may be defined.
• A sort key is only defined once and easily maintained with DYNCAT.
For more information about defining and maintaining SKNAMEs, see the
DYNCAT utility.
On the DLBL or TLBL statement you may also indicate the file name and logical
unit for the sort work file (SORTWRK). If you omit the SORTWRK parameter,
the file name WORK01 on SYS001 is assumed.
6–8 User Guide