Makes an ISAM mail file smaller.

  When you compress a file, the following four steps occur:

   1  A temporary file named MAIL_nnnn_COMPRESS.TMP is created.
      (nnnn is a unique, four-digit number.)

   2  The contents (of the file to be compressed) are copied to
      the temporary file and compressed.

   3  The original (uncompressed) file is renamed with a file
      type of OLD.

   4  The newly compressed file is renamed from
      MAIL_nnnn_COMPRESS.TMP back to its original name.

   Format:

         COMPRESS [file-spec]

Additional information available:

ParametersQualifiersExamples

 file-spec

   The name of the mail file to be compressed.  If a file-spec is
   not specified, MAIL will compress the mail file that is
   currently open.  If there is no open mail file, MAIL will
   compress the default mail file.

Additional information available:

/OUTPUT

   The name of the compressed file.

  1.

       $ MAIL
       MAIL> COMPRESS
       %MAIL-S-CREATED, DISK$FUN:[FELLINI]MAIL_08C8_COMPRESS.TMP;1 created
       %MAIL-S-COPIED, DISK$FUN:[FELLINI]MAIL.MAI;1 copied to DISK$FUN:[FELLINI]MAIL_08C8_COMPRESS.TMP;1 (2 records)
       %MAIL-S-RENAMED, DISK$FUN:[FELLINI]MAIL.MAI;1 renamed to DISK$FUN:[FELLINI]MAIL.OLD;2
       %MAIL-S-RENAMED, DISK$FUN:[FELLINI]MAIL_08C8_COMPRESS.TMP;1 renamed to DISK$FUN:[FELLINI]MAIL.MAI;1

         This example shows how to compress the contents of your default
         mail file (MAIL.MAI).

  2.

       MAIL> COMPRESS trips.mai
       %MAIL-S-CREATED, DISK$FUN:[FELLINI]MAIL_08C8_COMPRESS.TMP;1 created
       %MAIL-S-COPIED, DISK$FUN:[FELLINI]TRIPS.MAI;1 copied to DISK$FUN:[FELLINI]MAIL_08C8_COMPRESS.TMP;1 (2 records)
       %MAIL-S-RENAMED, DISK$FUN:[FELLINI]TRIPS.MAI;1 renamed to DISK$FUN:[FELLINI]TRIPS.OLD;2
       %MAIL-S-RENAMED, DISK$FUN:[FELLINI]MAIL_08C8_COMPRESS.TMP;1 renamed to DISK$FUN:[FELLINI]TRIPS.MAI;1

         This example shows how to compress the contents of a file named
         TRIPS.MAI.