CDF API for FFI

ffi/src/engine_data.rs

@@ -64,6 +64,16 @@ pub struct ArrowFFIData {
     pub schema: FFI_ArrowSchema,
 }
 
+#[cfg(feature = "default-engine-base")]
+impl ArrowFFIData {
+    pub fn empty() -> Self {
+        Self {
+            array: FFI_ArrowArray::empty(),
+            schema: FFI_ArrowSchema::empty(),
+        }
+    }
+}
+
 // TODO: This should use a callback to avoid having to have the engine free the struct
 /// Get an [`ArrowFFIData`] to allow binding to the arrow [C Data
 /// Interface](https://arrow.apache.org/docs/format/CDataInterface.html). This includes the data and

ffi/src/lib.rs

@@ -37,6 +37,8 @@ pub use domain_metadata::get_domain_metadata;
 pub mod engine_data;
 pub mod engine_funcs;
 pub mod error;
+#[cfg(feature = "default-engine-base")]
+pub mod table_changes;
 use error::{AllocateError, AllocateErrorFn, ExternResult, IntoExternResult};
 pub mod expressions;
 #[cfg(feature = "tracing")]