The PPSQL option specifies options to be passed to the SQL preprocessor if it is invoked.
.-NOPPSQL-----------------------. >>-+-PPSQL--(--‘options string’--)-+---------------------------><
So, specifying PPSQL('ONEPASS') PP(SQL) is the same as specifying PP(SQL('ONEPASS')).
This option has no effect unless the PP(SQL) option is specified. However, if you want to specify a set of SQL preprocessor options that should be used if and when the SQL preprocessor is invoked, you could specify this option in the installation options exit. Then whenever you specified PP(SQL), the set of options specified in the PPSQL option would be used.
Also, any options specified when the preprocessor is invoked overrule those specified in the PPSQL option. So, specifying PPSQL('ONEPASS') PP(SQL('TWOPASS')) is the same as specifying PP(SQL('ONEPASS TWOPASS')) or the even simpler PP(SQL('TWOPASS')).
The options string is limited to 1000 characters in length. However, if the string is longer than 100 characters, it will not be shown in the options listing.