minor ffi fixes

Author: nicklan

ffi/src/lib.rs

@@ -263,6 +263,7 @@ pub enum KernelError {
     InvalidTableLocationError,
     InvalidDecimalError,
     InvalidStructDataError,
+    InternalError,
 }
 
 impl From<Error> for KernelError {
@@ -303,6 +304,7 @@ impl From<Error> for KernelError {
             Error::InvalidTableLocation(_) => KernelError::InvalidTableLocationError,
             Error::InvalidDecimal(_) => KernelError::InvalidDecimalError,
             Error::InvalidStructData(_) => KernelError::InvalidStructDataError,
+            Error::InternalError(_) => KernelError::InternalError,
             Error::Backtraced {
                 source,
                 backtrace: _,

ffi/src/scan.rs

@@ -5,7 +5,7 @@ use std::ffi::c_void;
 use std::sync::{Arc, Mutex};
 
 use delta_kernel::scan::state::{visit_scan_files, DvInfo, GlobalScanState};
-use delta_kernel::scan::{Scan, ScanBuilder, ScanData};
+use delta_kernel::scan::{Scan, ScanData};
 use delta_kernel::schema::Schema;
 use delta_kernel::snapshot::Snapshot;
 use delta_kernel::{DeltaResult, EngineData, Error};