By default, the server
processes entire tables unless you specify a range of rows. You can
specify a range using the macro variables SPDSSOBS and SPDSEOBS, or
you can use the table options, STARTOBS= and ENDOBS=.
If you specify the end of a user-defined range using the SPDSEOBS
macro variable, but do not specify the beginning of the range using SPDSSOBS, the server sets SPDSSOBS
to 1. If you specify values for both SPDSSOBS and SPDSEOBS macro variables, the value
of SPDSEOBS must be greater than SPDSSOBS. The SPDSSOBS and SPDSEOBS macro variables
specify ranges for table input processing as well as
WHERE clause processing.