class OCI8

def prefetch_rows=(num)

Note: The default value had been 1 before ruby-oci8 2.2.0.

retrieving specified number of rows in one round trip.
prefetch buffer to reduce the number of network round trips by
When a select statement is executed, the OCI library allocate
Sets the prefetch rows size. The default value is 100. 
def prefetch_rows=(num)
  @prefetch_rows = num
end