Environment Variable

The following environment variables may be set by the user:

• SAS_CLOBBER
  Determines the clobber behaviour. 0 implies that datasets may not be overridden, whilst 1 implies otherwise.
• SAS_FORMAT
  Determines the output format of new datasets. The following settings are allowed:
  • 1, FITS
  • 2, DAL
  • 3, DECEIT
• SAS_MEMORY_MODEL
  Determines which memory model the DAL uses to open datasets. The following settings are allowed:
  • 1, high
  • 2, highlow
  • 3, low - as the low memory model is not implemented, this will default to highlow
• SAS_ROWS
  Determines the number of rows selected when iterating over a table. Any positive integer value is allowed.
• SAS_COLUMN_WISE
  The DAL can write table columns (to the underlying FITS file) either in a column-by-column or a row-by-row fashion. The default behaviour is row-by-row, but setting the environment variable SAS_COLUMN_WISE ensures the column-by-column method is used.