diff --git a/cpp/include/cudf/io/types.hpp b/cpp/include/cudf/io/types.hpp
index 3df737413fa..a34881942ce 100644
--- a/cpp/include/cudf/io/types.hpp
+++ b/cpp/include/cudf/io/types.hpp
@@ -54,7 +54,7 @@ namespace io {
 /**
  * @brief Compression algorithms
  */
-enum class compression_type {
+enum class compression_type : int32_t {
   NONE,    ///< No compression
   AUTO,    ///< Automatically detect or select compression format
   SNAPPY,  ///< Snappy format, using byte-oriented LZ77
@@ -72,7 +72,7 @@ enum class compression_type {
 /**
  * @brief Data source or destination types
  */
-enum class io_type {
+enum class io_type : int32_t {
   FILEPATH,          ///< Input/output is a file path
   HOST_BUFFER,       ///< Input/output is a buffer in host memory
   DEVICE_BUFFER,     ///< Input/output is a buffer in device memory
@@ -83,7 +83,7 @@ enum class io_type {
 /**
  * @brief Behavior when handling quotations in field data
  */
-enum class quote_style {
+enum class quote_style : int32_t {
   MINIMAL,     ///< Quote only fields which contain special characters
   ALL,         ///< Quote all fields
   NONNUMERIC,  ///< Quote all non-numeric fields
@@ -93,7 +93,7 @@ enum class quote_style {
 /**
  * @brief Column statistics granularity type for parquet/orc writers
  */
-enum statistics_freq {
+enum statistics_freq : int32_t {
   STATISTICS_NONE     = 0,  ///< No column statistics
   STATISTICS_ROWGROUP = 1,  ///< Per-Rowgroup column statistics
   STATISTICS_PAGE     = 2,  ///< Per-page column statistics
@@ -103,7 +103,7 @@ enum statistics_freq {
 /**
  * @brief Valid encodings for use with `column_in_metadata::set_encoding()`
  */
-enum class column_encoding {
+enum class column_encoding : int32_t {
   // Common encodings:
   USE_DEFAULT = -1,  ///< No encoding has been requested, use default encoding
   DICTIONARY,        ///< Use dictionary encoding
@@ -222,7 +222,7 @@ class writer_compression_statistics {
 /**
  * @brief Control use of dictionary encoding for parquet writer
  */
-enum dictionary_policy {
+enum dictionary_policy : int32_t {
   NEVER    = 0,  ///< Never use dictionary encoding
   ADAPTIVE = 1,  ///< Use dictionary when it will not impact compression
   ALWAYS   = 2   ///< Use dictionary regardless of impact on compression
diff --git a/python/pylibcudf/pylibcudf/libcudf/io/types.pxd b/python/pylibcudf/pylibcudf/libcudf/io/types.pxd
index a3d99807876..5f3be2f0727 100644
--- a/python/pylibcudf/pylibcudf/libcudf/io/types.pxd
+++ b/python/pylibcudf/pylibcudf/libcudf/io/types.pxd
@@ -6,12 +6,10 @@ cimport pylibcudf.libcudf.table.table_view as cudf_table_view
 from libc.stdint cimport int32_t, uint8_t
 from libcpp cimport bool
 from libcpp.map cimport map
-from libcpp.memory cimport shared_ptr, unique_ptr
-from libcpp.pair cimport pair
+from libcpp.memory cimport unique_ptr
 from libcpp.string cimport string
 from libcpp.unordered_map cimport unordered_map
 from libcpp.vector cimport vector
-from pyarrow.includes.libarrow cimport CRandomAccessFile
 from pylibcudf.libcudf.table.table cimport table
 from pylibcudf.libcudf.types cimport size_type
 
@@ -42,32 +40,32 @@ cdef extern from "cudf/io/types.hpp" \
     cpdef enum class io_type(int32_t):
         FILEPATH
         HOST_BUFFER
+        DEVICE_BUFFER
         VOID
         USER_IMPLEMENTED
 
     cpdef enum class statistics_freq(int32_t):
-        STATISTICS_NONE = 0,
-        STATISTICS_ROWGROUP = 1,
-        STATISTICS_PAGE = 2,
-        STATISTICS_COLUMN = 3,
+        STATISTICS_NONE,
+        STATISTICS_ROWGROUP,
+        STATISTICS_PAGE,
+        STATISTICS_COLUMN,
 
     cpdef enum class dictionary_policy(int32_t):
-        NEVER = 0,
-        ADAPTIVE = 1,
-        ALWAYS = 2,
-
-    cdef extern from "cudf/io/types.hpp" namespace "cudf::io" nogil:
-        cpdef enum class column_encoding(int32_t):
-            USE_DEFAULT = -1
-            DICTIONARY = 0
-            PLAIN = 1
-            DELTA_BINARY_PACKED = 2
-            DELTA_LENGTH_BYTE_ARRAY =3
-            DELTA_BYTE_ARRAY = 4
-            BYTE_STREAM_SPLIT = 5
-            DIRECT = 6
-            DIRECT_V2 = 7
-            DICTIONARY_V2 = 8
+        NEVER,
+        ADAPTIVE,
+        ALWAYS,
+
+    cpdef enum class column_encoding(int32_t):
+        USE_DEFAULT
+        DICTIONARY
+        PLAIN
+        DELTA_BINARY_PACKED
+        DELTA_LENGTH_BYTE_ARRAY
+        DELTA_BYTE_ARRAY
+        BYTE_STREAM_SPLIT
+        DIRECT
+        DIRECT_V2
+        DICTIONARY_V2
 
     cdef cppclass column_name_info:
         string name
@@ -76,7 +74,6 @@ cdef extern from "cudf/io/types.hpp" \
     cdef cppclass table_metadata:
         table_metadata() except +
 
-        vector[string] column_names
         map[string, string] user_data
         vector[unordered_map[string, string]] per_file_user_data
         vector[column_name_info] schema_info
@@ -120,10 +117,7 @@ cdef extern from "cudf/io/types.hpp" \
         host_buffer(const char* data, size_t size)
 
     cdef cppclass source_info:
-        io_type type
         const vector[string]& filepaths() except +
-        const vector[host_buffer]& buffers() except +
-        vector[shared_ptr[CRandomAccessFile]] files
 
         source_info() except +
         source_info(const vector[string] &filepaths) except +
@@ -132,9 +126,7 @@ cdef extern from "cudf/io/types.hpp" \
         source_info(const vector[cudf_io_datasource.datasource*] &datasources) except +
 
     cdef cppclass sink_info:
-        io_type type
         const vector[string]& filepaths()
-        const vector[vector[char] *]& buffers()
         const vector[cudf_io_data_sink.data_sink *]& user_sinks()
 
         sink_info() except +