diff --git a/velox/dwio/common/Closeable.h b/velox/dwio/common/Closeable.h
index 4572e08cf98a..bdb825437889 100644
--- a/velox/dwio/common/Closeable.h
+++ b/velox/dwio/common/Closeable.h
@@ -18,10 +18,7 @@
 
 #include "velox/dwio/common/exception/Exception.h"
 
-namespace facebook {
-namespace velox {
-namespace dwio {
-namespace common {
+namespace facebook::velox::dwio::common {
 
 // Base class for closeable object which need to be explicitly closed before
 // being destructed
@@ -67,7 +64,4 @@ class Closeable {
   bool closed_;
 };
 
-} // namespace common
-} // namespace dwio
-} // namespace velox
-} // namespace facebook
+} // namespace facebook::velox::dwio::common
diff --git a/velox/dwio/common/FormatData.h b/velox/dwio/common/FormatData.h
index d0d37006a2a8..bff3c420bc50 100644
--- a/velox/dwio/common/FormatData.h
+++ b/velox/dwio/common/FormatData.h
@@ -17,8 +17,8 @@
 #pragma once
 
 #include "velox/common/memory/Memory.h"
+#include "velox/dwio/common/PositionProvider.h"
 #include "velox/dwio/common/ScanSpec.h"
-#include "velox/dwio/common/SeekableInputStream.h"
 #include "velox/dwio/common/Statistics.h"
 #include "velox/dwio/common/TypeWithId.h"
 #include "velox/type/Filter.h"
@@ -40,7 +40,7 @@ class FormatData {
   /// data. If there are no nulls, 'nulls' is set to nullptr, else to
   /// a suitable sized and padded Buffer. 'incomingNulls' may be given
   /// if there are enclosing level nulls that should be merged into
-  /// the read reasult. If provided, this has 'numValues' bits and
+  /// the read result. If provided, this has 'numValues' bits and
   /// each zero marks an incoming null for which no bit is read from
   /// the nulls stream of 'this'. For Parquet, 'nulls' is always set
   /// to nullptr because nulls are represented by the data pages
diff --git a/velox/dwio/common/PositionProvider.h b/velox/dwio/common/PositionProvider.h
new file mode 100644
index 000000000000..7be3bc7a1602
--- /dev/null
+++ b/velox/dwio/common/PositionProvider.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <vector>
+
+namespace facebook::velox::dwio::common {
+
+class PositionProvider {
+ public:
+  explicit PositionProvider(const std::vector<uint64_t>& positions)
+      : position_{positions.begin()}, end_{positions.end()} {}
+
+  uint64_t next();
+
+  bool hasNext() const;
+
+ private:
+  std::vector<uint64_t>::const_iterator position_;
+  std::vector<uint64_t>::const_iterator end_;
+};
+
+} // namespace facebook::velox::dwio::common
diff --git a/velox/dwio/common/SeekableInputStream.h b/velox/dwio/common/SeekableInputStream.h
index 021d78493ab6..ab402753b8c5 100644
--- a/velox/dwio/common/SeekableInputStream.h
+++ b/velox/dwio/common/SeekableInputStream.h
@@ -16,30 +16,15 @@
 
 #pragma once
 
-#include <vector>
-
 #include "velox/dwio/common/DataBuffer.h"
 #include "velox/dwio/common/InputStream.h"
+#include "velox/dwio/common/PositionProvider.h"
 #include "velox/dwio/common/wrap/zero-copy-stream-wrapper.h"
 
 namespace facebook::velox::dwio::common {
 
 void printBuffer(std::ostream& out, const char* buffer, uint64_t length);
 
-class PositionProvider {
- public:
-  explicit PositionProvider(const std::vector<uint64_t>& positions)
-      : position_{positions.begin()}, end_{positions.end()} {}
-
-  uint64_t next();
-
-  bool hasNext() const;
-
- private:
-  std::vector<uint64_t>::const_iterator position_;
-  std::vector<uint64_t>::const_iterator end_;
-};
-
 /**
  * A subclass of Google's ZeroCopyInputStream that supports seek.
  * By extending Google's class, we get the ability to pass it directly