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| Macro Language Elements |
Automatic Macro Variables
Automatic macro variables are created by the macro processor and they supply a variety of information. They are useful in programs to check the status of a condition before executing code. When you use automatic macro variables, you reference them the same way that you do macro variables that you create such as &SYSLAST or &SYSJOBID.
- CAUTION:
- Do not create macro variable names that
begin with SYS.
The three-letter prefix SYS is reserved for use by SAS for automatic macro variables. For a complete list of reserved words in the macro language, see Reserved Words in the Macro Facility.
![[cautionend]](../../../../common/63294/HTML/default/images/cautend.gif)
For example, suppose you want to include the day and date that your current SAS session was invoked. Write the FOOTNOTE statement to reference the automatic macro variables SYSDAY and SYSDATE9:
footnote "Report for &sysday, &sysdate9";
If the current SAS session was invoked on June 13, 2007, macro variable resolution causes SAS to see this statement:
FOOTNOTE "Report for Friday, 13JUN2007";
All automatic variables except for SYSPBUFF are global and are created when you invoke SAS. The following table lists the automatic macro variables and describes their READ and WRITE status.
| Variable | Read and Write Status |
|---|---|
| SYSBUFFR | read and write |
| SYSCC | read and write |
| SYSCHARWIDTH | read-only |
| SYSCMD | read and write |
| SYSDATE | read-only |
| SYSDATE9 | read-only |
| SYSDAY | read-only |
| SYSDEVIC | read and write |
| SYSDMG | read and write |
| SYSDSN | read and write |
| SYSENCODING | read-only |
| SYSENV | read-only |
| SYSERR | read-only |
| SYSERRORTEXT | read only |
| SYSFILRC | read and write |
| SYSHOSTNAME | read-only |
| SYSINDEX | read-only |
| SYSINFO | read-only |
| SYSJOBID | read-only |
| SYSLAST | read and write |
| SYSLCKRC | read and write |
| SYSLIBRC | read and write |
| SYSLOGAPPLNAME | read-only |
| SYSMACRONAME | read-only |
| SYSMENV | read-only |
| SYSMSG | read and write |
| SYSNCPU | read-only |
| SYSODSPATH | read-only |
| SYSPARM | read and write |
| SYSPBUFF | read and write |
| SYSPROCESSID | read-only |
| SYSPROCESSNAME | read-only |
| SYSPROCNAME | read-only |
| SYSRC | read and write |
| SYSSCP | read-only |
| SYSSCPL | read-only |
| SYSSITE | read-only |
| SYSSTARTID | read-only |
| SYSSTARTNAME | read-only |
| SYSTCPIPHOSTNAME | read-only |
| SYSTIME | read-only |
| SYSUSERID | read-only |
| SYSVER | read-only |
| SYSVLONG | read-only |
| SYSVLONG4 | read-only |
| SYSWARNINGTEXT | read-only |
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Copyright © 2009 by SAS Institute Inc., Cary, NC, USA. All rights reserved.