feat: impl scanning data from storage engine for table (#47)

* feat: impl scanning data from storage for MitoTable

* adds test mod to setup table engine test

* fix: comment error

* fix: boyan -> dennis in todo comments

* fix: remove necessary send in BatchIteratorPtr

src/common/recordbatch/src/error.rs

@@ -1,6 +1,9 @@
 use datatypes::arrow::error::ArrowError;
 use snafu::{Backtrace, Snafu};
 
+// TODO(dennis): use ErrorExt instead.
+pub type BoxedError = Box<dyn std::error::Error + Send + Sync>;
+
 #[derive(Debug, Snafu)]
 #[snafu(visibility(pub))]
 pub enum Error {
@@ -9,6 +12,9 @@ pub enum Error {
         source: ArrowError,
         backtrace: Backtrace,
     },
+
+    #[snafu(display("Storage error: {}, source: {}", msg, source))]
+    Storage { source: BoxedError, msg: String },
 }
 
 pub type Result<T> = std::result::Result<T, Error>;