In Chapter 2, “Database Options,” Syntax 1 in the section “DBISQL options” should contain the keyword TEMPORARY:
SET [ TEMPORARY ] OPTION ... [ userid. | PUBLIC. ]option-name = [ option-value ]
Also the following sentence belongs at the beginning of the “DBISQL options” Description section:
“Syntax 1 with the TEMPORARY keyword cannot be used between the BEGIN and END keywords of a compound statement.”