Promote create_string_vector_from_column to public api as needed by p…

…ython

cpp/include/cudf/strings/utilities.hpp

@@ -15,11 +15,28 @@
  */
 #pragma once
 
+#include <cudf/strings/strings_column_view.hpp>
 #include <cudf/utilities/export.hpp>
 
+#include <rmm/mr/device/per_device_resource.hpp>
+#include <rmm/resource_ref.hpp>
+
 namespace CUDF_EXPORT cudf {
 namespace strings {
 
+/**
+ * @brief Creates a string_view vector from a strings column.
+ *
+ * @param strings Strings column instance.
+ * @param stream CUDA stream used for device memory operations and kernel launches.
+ * @param mr Device memory resource used to allocate the returned vector's device memory.
+ * @return Device vector of string_views
+ */
+rmm::device_uvector<string_view> create_string_vector_from_column(
+  cudf::strings_column_view const strings,
+  rmm::cuda_stream_view stream      = cudf::get_default_stream(),
+  rmm::device_async_resource_ref mr = rmm::mr::get_current_device_resource());
+
 /**
  * @brief Return the threshold size for a strings column to use int64 offsets
  *

cpp/src/strings/utilities.cu

@@ -21,6 +21,7 @@
 #include <cudf/column/column_device_view.cuh>
 #include <cudf/column/column_factories.hpp>
 #include <cudf/detail/get_value.cuh>
+#include <cudf/detail/nvtx/ranges.hpp>
 #include <cudf/strings/detail/char_tables.hpp>
 #include <cudf/strings/detail/utilities.cuh>
 #include <cudf/strings/detail/utilities.hpp>
@@ -161,6 +162,14 @@ int64_t get_offset_value(cudf::column_view const& offsets,
 
 }  // namespace detail
 
+rmm::device_uvector<string_view> create_string_vector_from_column(
+  cudf::strings_column_view const input,
+  rmm::cuda_stream_view stream,
+  rmm::device_async_resource_ref mr)
+{
+  CUDF_FUNC_RANGE();
+  return detail::create_string_vector_from_column(input, stream, mr);
+}
 
 int64_t get_offset64_threshold()
 {

python/cudf/udf_cpp/strings/src/strings/udf/udf_apis.cu

@@ -15,10 +15,10 @@
  */
 
 #include <cudf/column/column_factories.hpp>
-#include <cudf/strings/detail/utilities.hpp>
 #include <cudf/strings/string_view.cuh>
 #include <cudf/strings/udf/udf_apis.hpp>
 #include <cudf/strings/udf/udf_string.cuh>
+#include <cudf/strings/utilities.hpp>
 #include <cudf/utilities/default_stream.hpp>
 
 #include <rmm/device_uvector.hpp>
@@ -57,7 +57,7 @@ std::unique_ptr<rmm::device_buffer> to_string_view_array(cudf::column_view const
                                                          rmm::cuda_stream_view stream)
 {
   return std::make_unique<rmm::device_buffer>(
-    std::move(cudf::strings::detail::create_string_vector_from_column(
+    std::move(cudf::strings::create_string_vector_from_column(
                 cudf::strings_column_view(input), stream, rmm::mr::get_current_device_resource())
                 .release()));
 }