The DDSQL option allows you to specify an alternate DD name for the dataset to be used by the SQL preprocessor when resolving EXEC SQL INCLUDE statements.
.-''-----. >>-DDSQL--(--+-ddname-+--)-------------------------------------><
Under the DDSQL('') option, the DD name that is used to resolve EXEC SQL INCLUDE statements is the DD name for SYSLIB from the DD compiler option.
This option may be useful when moving from the SQL precompiler to the integrated SQL preprocessor.