The data callback classes can be used with Oracle to insert and fetch data. These classes are useful for very large data that may not fit in memory for a single database call and are described in Section 15.3, “The Data Callback Classes,” in the DB Interface Module User’s Guide.

Oracle supports sending multiple rows of data for one execution of an insert statement. Retrieving multiple rows of data on each call to RWDBOSql::fetch() is also supported.