Add partitioning support in parquet writer

cpp/include/cudf/io/data_sink.hpp

@@ -69,6 +69,22 @@ class data_sink {
    */
   static std::unique_ptr<data_sink> create(cudf::io::data_sink* const user_sink);
 
+  /**
+   * @brief Creates a vector of data sinks, one per element in the input vector.
+   *
+   * @param[in] args vector of parameters
+   */
+  template <typename T>
+  static std::vector<std::unique_ptr<data_sink>> create(std::vector<T> const& args)
+  {
+    std::vector<std::unique_ptr<data_sink>> sinks;
+    sinks.reserve(args.size());
+    std::transform(args.cbegin(), args.cend(), std::back_inserter(sinks), [](auto const& arg) {
+      return data_sink::create(arg);
+    });
+    return sinks;
+  }
+
   /**
    * @brief Base class destructor
    */

cpp/include/cudf/io/detail/parquet.hpp

@@ -91,13 +91,13 @@ class writer {
   /**
    * @brief Constructor for output to a file.
    *
-   * @param sink The data sink to write the data to
+   * @param sinks The data sinks to write the data to
    * @param options Settings for controlling writing behavior
    * @param mode Option to write at once or in chunks
    * @param stream CUDA stream used for device memory operations and kernel launches
    * @param mr Device memory resource to use for device memory allocation
    */
-  explicit writer(std::unique_ptr<cudf::io::data_sink> sink,
+  explicit writer(std::vector<std::unique_ptr<data_sink>> sinks,
                   parquet_writer_options const& options,
                   SingleWriteMode mode,
                   rmm::cuda_stream_view stream,
@@ -106,15 +106,15 @@ class writer {
   /**
    * @brief Constructor for writer to handle chunked parquet options.
    *
-   * @param sink The data sink to write the data to
+   * @param sinks The data sinks to write the data to
    * @param options Settings for controlling writing behavior for chunked writer
    * @param mode Option to write at once or in chunks
    * @param stream CUDA stream used for device memory operations and kernel launches
    * @param mr Device memory resource to use for device memory allocation
    *
    * @return A parquet-compatible blob that contains the data for all rowgroups in the list
    */
-  explicit writer(std::unique_ptr<cudf::io::data_sink> sink,
+  explicit writer(std::vector<std::unique_ptr<data_sink>> sinks,
                   chunked_parquet_writer_options const& options,
                   SingleWriteMode mode,
                   rmm::cuda_stream_view stream,
@@ -129,8 +129,10 @@ class writer {
    * @brief Writes a single subtable as part of a larger parquet file/table write.
    *
    * @param[in] table The table information to be written
+   * @param[in] partitions Optional partitions to divide the table into. If specified, must be same
+   * size as number of sinks.
    */
-  void write(table_view const& table);
+  void write(table_view const& table, std::vector<partition_info> const& partitions = {});
 
   /**
    * @brief Finishes the chunked/streamed write process.
@@ -140,7 +142,8 @@ class writer {
    * @return A parquet-compatible blob that contains the data for all rowgroups in the list only if
    * `column_chunks_file_path` is provided, else null.
    */
-  std::unique_ptr<std::vector<uint8_t>> close(std::string const& column_chunks_file_path = "");
+  std::unique_ptr<std::vector<uint8_t>> close(
+    std::vector<std::string> const& column_chunks_file_path = {});
 
   /**
    * @brief Merges multiple metadata blobs returned by write_all into a single metadata blob

cpp/include/cudf/io/orc.hpp

@@ -454,6 +454,8 @@ class orc_writer_options {
   table_view _table;
   // Optional associated metadata
   const table_input_metadata* _metadata = nullptr;
+  // Optional footer key_value_metadata
+  std::map<std::string, std::string> _user_data;
 
   friend orc_writer_options_builder;
 
@@ -530,6 +532,11 @@ class orc_writer_options {
    */
   table_input_metadata const* get_metadata() const { return _metadata; }
 
+  /**
+   * @brief Returns Key-Value footer metadata information.
+   */
+  std::map<std::string, std::string> const& get_key_value_metadata() const { return _user_data; }
+
   // Setters
 
   /**
@@ -591,6 +598,16 @@ class orc_writer_options {
    * @param meta Associated metadata.
    */
   void set_metadata(table_input_metadata const* meta) { _metadata = meta; }
+
+  /**
+   * @brief Sets metadata.
+   *
+   * @param metadata Key-Value footer metadata
+   */
+  void set_key_value_metadata(std::map<std::string, std::string> metadata)
+  {
+    _user_data = std::move(metadata);
+  }
 };
 
 class orc_writer_options_builder {
@@ -698,6 +715,18 @@ class orc_writer_options_builder {
     return *this;
   }
 
+  /**
+   * @brief Sets Key-Value footer metadata.
+   *
+   * @param metadata Key-Value footer metadata
+   * @return this for chaining.
+   */
+  orc_writer_options_builder& key_value_metadata(std::map<std::string, std::string> metadata)
+  {
+    options._user_data = std::move(metadata);
+    return *this;
+  }
+
   /**
    * @brief move orc_writer_options member once it's built.
    */
@@ -753,6 +782,8 @@ class chunked_orc_writer_options {
   size_type _row_index_stride = default_row_index_stride;
   // Optional associated metadata
   const table_input_metadata* _metadata = nullptr;
+  // Optional footer key_value_metadata
+  std::map<std::string, std::string> _user_data;
 
   friend chunked_orc_writer_options_builder;
 
@@ -819,6 +850,11 @@ class chunked_orc_writer_options {
    */
   table_input_metadata const* get_metadata() const { return _metadata; }
 
+  /**
+   * @brief Returns Key-Value footer metadata information.
+   */
+  std::map<std::string, std::string> const& get_key_value_metadata() const { return _user_data; }
+
   // Setters
 
   /**
@@ -873,6 +909,16 @@ class chunked_orc_writer_options {
    * @param meta Associated metadata.
    */
   void metadata(table_input_metadata const* meta) { _metadata = meta; }
+
+  /**
+   * @brief Sets Key-Value footer metadata.
+   *
+   * @param metadata Key-Value footer metadata
+   */
+  void set_key_value_metadata(std::map<std::string, std::string> metadata)
+  {
+    _user_data = std::move(metadata);
+  }
 };
 
 class chunked_orc_writer_options_builder {
@@ -965,6 +1011,19 @@ class chunked_orc_writer_options_builder {
     return *this;
   }
 
+  /**
+   * @brief Sets Key-Value footer metadata.
+   *
+   * @param metadata Key-Value footer metadata
+   * @return this for chaining.
+   */
+  chunked_orc_writer_options_builder& key_value_metadata(
+    std::map<std::string, std::string> metadata)
+  {
+    options._user_data = std::move(metadata);
+    return *this;
+  }
+
   /**
    * @brief move chunked_orc_writer_options member once it's built.
    */