PostgreSQL supports returning a set of output parameters or return values, but no ODBC standard method exists for returning arrays of output parameters or return values. If the call Escape is used to invoke a function that returns a set of output parameters and buffers are bound for those output parameters, the PostgreSQL Wire Protocol driver places the first set of output parameters in the bound buffers. If no output parameters are bound for functions that return a set of results or output parameters, the driver returns a result set with a row for each set of output parameters.