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SAS®9 Processing of SAS 6 Files via the V6 Engine
If you do not migrate SAS 6 files to SAS®9 format, the V6 compatibility engine can automatically process some files. This topic describes the supported processing.Processing Compatible Files
The V6 engine provides the following processing for compatible SAS 6 files. Use the Compatibility Calculator to determine whether your files are compatible.- SAS data file supports input, update, and output.
- DATA step view and PROC SQL view support input.
- SAS/ACCESS view supports input and update.
- SAS catalog supports input.
- Stored compiled DATA step program supports input.
- MDDB file supports input.
- The DELETE statement is supported with PROC DATASETS in SAS 9.2 and later.
File types are explained in the SAS 9.2 Language Reference: Concepts.
Read-Only Processing of Incompatible Files for Selected Environments
The V6 engine provides the following processing for incompatible SAS 6 files under selected environments. Use the Compatibility Calculator to determine whether read-only V6 processing is supported for your files.
- SAS data file supports input (read-only).
- No SAS views, catalogs, compiled programs, or MDDBs are supported.
- Indexes are not supported.
- The DELETE statement is supported with PROC DATASETS in SAS 9.2 and later.
Using the V6 Engine
If you do not specify the V6 engine name, SAS identifies that a library is in Version 6 format and automatically assigns the V6 engine.
For example, in a SAS®9 session, if you issue the following LIBNAME statement to assign a libref to a SAS data library containing only Version 6 files, SAS automatically assigns the V6 engine:
libname myfiles 'v6-SAS-data-library';
However, it is suggested that you specify the V6 engine name:
libname myfiles v6 'v6-SAS-data-library';
Note: The V6 engine processes Version 6 files created by Release 6.08 through Release 6.12. For Version 6 files prior to Release 6.08, see the SAS documentation for your operating environment.
Creating Version 6 Files in SAS®9
You might need to create (output) a Version 6 file in a SAS®9 session, for example, if you are sharing data with a Version 6 application. To do so, see the information about using a SAS®9 file in Version 6, and methods for regressing a file to Version 6. Keep in mind that the Version 6 file must adhere to Version 6 capabilities, that is, no long names, no integrity constraints, and so on.
