doc.FAQ.WhatDoesUseExtendedFetchDo `Use Extended Fetch'' controls whether the OpenLink ODBC Bridge agent/Lite uses the SQLExtendedFetch () function of the underlying ODBC driver, if it's available, when fetching data. Using the bridged driver's SQLExtendedFetch () should improve performance. However it may be necessary to disable this setting- for instance, some drivers do not support extended fetching on a result-set produced by an ODBC catalog call.When extended fetching is disabled, the bridged driver's SQLFetch() function is used instead.