feat: new datatypes subcrate based on the official arrow (#705)

* feat: Init datatypes2 crate

* chore: Remove some unimplemented types

* feat: Implements PrimitiveType and PrimitiveVector for datatypes2 (#633)

* feat: Implement primitive types and vectors

* feat: Implement a wrapper type

* feat: Remove VectorType from ScalarRef

* feat: Move some trait bound from NativeType to WrapperType

* feat: pub use  primitive vectors and builders

* feat: Returns error in try_from when type mismatch

* feat: Impl PartialEq for some vectors

* test: Pass vector tests

* chore: Add license header

* test: Pass more vector tests

* feat: Implement some methods of vector Helper

* test: Pass more tests

* style: Fix clippy

* chore: Add license header

* feat: Remove IntoValueRef trait

* feat: Add NativeType trait bound to WrapperType::Native

* docs: Explain what is wrapper type

* chore: Fix typos

* refactor: LogicalPrimitiveType::type_name returns str

* feat: Implements DateType and DateVector (#651)

* feat: Implement DateType and DateVector

* test: Pass more value and data type tests

* chore: Address CR comments

* test: Skip list value test

* feat: datatypes2 datetime (#661)

* feat: impl DateTime type and vector

* fix: add license header

* fix: CR comments and add more tests

* fix: customized serialization for wrapper type

* feat: Implements NullType and NullVector (#658)

* feat: Implements NullType and NullVector

* chore: Address CR comment

Co-authored-by: Ruihang Xia <waynestxia@gmail.com>

* chore: Address CR comment

Co-authored-by: Ruihang Xia <waynestxia@gmail.com>

* feat: Implements StringType and StringVector (#659)

* feat: implement string vector

Signed-off-by: Ruihang Xia <waynestxia@gmail.com>

* add more test and from

Signed-off-by: Ruihang Xia <waynestxia@gmail.com>

* fix clippy

Signed-off-by: Ruihang Xia <waynestxia@gmail.com>

* cover NUL

Signed-off-by: Ruihang Xia <waynestxia@gmail.com>

Signed-off-by: Ruihang Xia <waynestxia@gmail.com>

* feat: impl datatypes2/timestamp (#686)

* feat: add timestamp datatype and vectors

* fix: cr comments and reformat code

* chore: add some tests

* feat: Implements ListType and ListVector (#681)

* feat: Implement ListType and ListVector

* test: Pass more tests

* style: Fix clippy

* chore: Fix comment

* chore: Address CR comments

* feat: impl constant vector (#680)

* feat: impl constant vector

Signed-off-by: Ruihang Xia <waynestxia@gmail.com>

* fix tests

Signed-off-by: Ruihang Xia <waynestxia@gmail.com>

* Apply suggestions from code review

Co-authored-by: Yingwen <realevenyag@gmail.com>

* rename fn names

Signed-off-by: Ruihang Xia <waynestxia@gmail.com>

* remove println

Signed-off-by: Ruihang Xia <waynestxia@gmail.com>

Signed-off-by: Ruihang Xia <waynestxia@gmail.com>
Co-authored-by: Yingwen <realevenyag@gmail.com>

* feat: Implements Validity (#684)

* feat: Implements Validity

* chore: remove pub from sub mod in vectors

* feat: Implements schema for datatypes2 (#695)

* feat: Add is_timestamp_compatible to DataType

* feat: Implement ColumnSchema and Schema

* feat: Impl RawSchema

* chore: Remove useless codes and run more tests

* chore: Fix clippy

* feat: Impl from_arrow_time_unit and pass schema tests

* chore: add more tests for timestamp (#702)

* chore: add more tests for timestamp

* chore: add replicate test for timestamps

* feat: Implements helper methods for vectors/values (#703)

* feat: Implement helper methods for vectors/values

* chore: Address CR comments

* chore: add more test for timestamp

Signed-off-by: Ruihang Xia <waynestxia@gmail.com>
Co-authored-by: evenyag <realevenyag@gmail.com>
Co-authored-by: Lei, HUANG <6406592+v0y4g3r@users.noreply.github.com>
Co-authored-by: Lei, HUANG <mrsatangel@gmail.com>

src/common/recordbatch/src/recordbatch.rs

@@ -23,6 +23,7 @@ use snafu::ResultExt;
 
 use crate::error::{self, Result};
 
+// TODO(yingwen): We should hold vectors in the RecordBatch.
 #[derive(Clone, Debug, PartialEq)]
 pub struct RecordBatch {
     pub schema: SchemaRef,
@@ -103,6 +104,7 @@ impl<'a> Iterator for RecordBatchRowIterator<'a> {
         } else {
             let mut row = Vec::with_capacity(self.columns);
 
+            // TODO(yingwen): Get from the vector if RecordBatch also holds vectors.
             for col in 0..self.columns {
                 let column_array = self.record_batch.df_recordbatch.column(col);
                 match arrow_array_get(column_array.as_ref(), self.row_cursor)