Section 13,16: DELETE

 Deletes a record from a relative file.  Statement format:


 Format -- Relative:

    DELETE ([UNIT=]u [,REC=r] [,ERR=s] [,IOSTAT=ios])
    DELETE (u'r [,ERR=s] [,IOSTAT=ios])

    Deletes the specified record from a relative file.

    u    Is the logical unit specifier, optionally prefaced 
         by UNIT=.  UNIT= is required if unit is not the first 
         I/O specifier.

    r    Is a record position specifier, prefaced by REC=.

    u'r  Is a unit and a record position specifier, not 
         prefaced by REC=.

    s    Is the label of a statement to which control is 
         transferred if an error occurs, prefaced by ERR=.

    ios  Is an I/O status specifier, prefaced by IOSTAT=.

 The forms of the DELETE statement with relative files are direct
 access deletes.  These forms delete the record specified by the
 number "r".  If REC=r is omitted, the current record is deleted.

 The DELETE statement logically removes the appropriate record from
 the specified file by locating the record and marking it as a
 deleted record.  A new record can be written into that position.

 Following a direct access delete, any associated variable is set to
 the next record number.

 NOTE:  You must specify the -vms compiler option for future READs
 to detect that a record has been deleted.