scalar.hpp
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2019-2023, NVIDIA CORPORATION.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 #pragma once
17 
18 #include <cudf/column/column.hpp>
19 #include <cudf/table/table.hpp>
20 #include <cudf/types.hpp>
21 #include <cudf/utilities/default_stream.hpp>
23 
24 #include <rmm/cuda_stream_view.hpp>
25 #include <rmm/device_buffer.hpp>
26 #include <rmm/device_scalar.hpp>
28 
34 namespace cudf {
48 class scalar {
49  public:
50  virtual ~scalar() = default;
51  scalar& operator=(scalar const& other) = delete;
52  scalar& operator=(scalar&& other) = delete;
53 
59  [[nodiscard]] data_type type() const noexcept;
60 
67  void set_valid_async(bool is_valid, rmm::cuda_stream_view stream = cudf::get_default_stream());
68 
79  [[nodiscard]] bool is_valid(rmm::cuda_stream_view stream = cudf::get_default_stream()) const;
80 
86  bool* validity_data();
87 
93  [[nodiscard]] bool const* validity_data() const;
94 
95  protected:
96  data_type _type{type_id::EMPTY};
98 
99  scalar() = delete;
100 
105  scalar(scalar&& other) = default;
106 
114  scalar(scalar const& other,
116  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
117 
130  bool is_valid = false,
132  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
133 };
134 
135 namespace detail {
141 template <typename T>
142 class fixed_width_scalar : public scalar {
143  static_assert(is_fixed_width<T>(), "Unexpected non-fixed-width type.");
144 
145  public:
146  using value_type = T;
147 
148  ~fixed_width_scalar() override = default;
149 
155 
156  fixed_width_scalar& operator=(fixed_width_scalar const& other) = delete;
157  fixed_width_scalar& operator=(fixed_width_scalar&& other) = delete;
158 
168  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
169 
177 
181  explicit operator value_type() const;
182 
190 
195  T* data();
196 
201  T const* data() const;
202 
203  protected:
205 
206  fixed_width_scalar() = delete;
207 
217  bool is_valid = true,
219  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
220 
230  bool is_valid = true,
232  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
233 };
234 
235 } // namespace detail
236 
242 template <typename T>
244  static_assert(is_numeric<T>(), "Unexpected non-numeric type.");
245 
246  public:
247  numeric_scalar() = delete;
248  ~numeric_scalar() = default;
249 
254  numeric_scalar(numeric_scalar&& other) = default;
255 
256  numeric_scalar& operator=(numeric_scalar const& other) = delete;
257  numeric_scalar& operator=(numeric_scalar&& other) = delete;
258 
268  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
269 
279  bool is_valid = true,
281  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
282 
292  bool is_valid = true,
294  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
295 };
296 
302 template <typename T>
303 class fixed_point_scalar : public scalar {
304  static_assert(is_fixed_point<T>(), "Unexpected non-fixed_point type.");
305 
306  public:
307  using rep_type = typename T::rep;
308  using value_type = T;
309 
310  fixed_point_scalar() = delete;
311  ~fixed_point_scalar() override = default;
312 
318 
319  fixed_point_scalar& operator=(fixed_point_scalar const& other) = delete;
320  fixed_point_scalar& operator=(fixed_point_scalar&& other) = delete;
321 
331  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
332 
343  numeric::scale_type scale,
344  bool is_valid = true,
346  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
347 
357  bool is_valid = true,
359  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
360 
370  bool is_valid = true,
372  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
373 
384  numeric::scale_type scale,
385  bool is_valid = true,
387  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
388 
396 
404 
408  explicit operator value_type() const;
409 
415 
420  rep_type const* data() const;
421 
422  protected:
424 };
425 
429 class string_scalar : public scalar {
430  public:
432 
433  string_scalar() = delete;
434  ~string_scalar() override = default;
435 
440  string_scalar(string_scalar&& other) = default;
441 
442  // string_scalar(string_scalar const& other) = delete;
443  string_scalar& operator=(string_scalar const& other) = delete;
444  string_scalar& operator=(string_scalar&& other) = delete;
445 
455  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
456 
467  string_scalar(std::string const& string,
468  bool is_valid = true,
470  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
471 
482  string_scalar(value_type const& source,
483  bool is_valid = true,
485  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
486 
498  bool is_valid = true,
500  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
501 
514  bool is_valid = true,
516  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
517 
521  explicit operator std::string() const;
522 
529  [[nodiscard]] std::string to_string(
531 
539 
544  [[nodiscard]] size_type size() const;
545 
550  [[nodiscard]] char const* data() const;
551 
552  protected:
554 };
555 
562 template <typename T>
564  static_assert(is_chrono<T>(), "Unexpected non-chrono type");
565 
566  public:
567  chrono_scalar() = delete;
568  ~chrono_scalar() = default;
569 
574  chrono_scalar(chrono_scalar&& other) = default;
575 
576  chrono_scalar& operator=(chrono_scalar const& other) = delete;
577  chrono_scalar& operator=(chrono_scalar&& other) = delete;
578 
588  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
589 
599  bool is_valid = true,
601  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
602 
612  bool is_valid = true,
614  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
615 };
616 
623 template <typename T>
624 class timestamp_scalar : public chrono_scalar<T> {
625  public:
626  static_assert(is_timestamp<T>(), "Unexpected non-timestamp type");
628  using rep_type = typename T::rep;
629 
630  timestamp_scalar() = delete;
631 
636  timestamp_scalar(timestamp_scalar&& other) = default;
637 
647  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
648 
659  template <typename Duration2>
660  timestamp_scalar(Duration2 const& value,
661  bool is_valid,
663  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
664 
670 };
671 
678 template <typename T>
679 class duration_scalar : public chrono_scalar<T> {
680  public:
681  static_assert(is_duration<T>(), "Unexpected non-duration type");
683  using rep_type = typename T::rep;
684 
685  duration_scalar() = delete;
686 
691  duration_scalar(duration_scalar&& other) = default;
692 
702  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
703 
713  bool is_valid,
715  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
716 
722 };
723 
727 class list_scalar : public scalar {
728  public:
729  list_scalar() = delete;
730  ~list_scalar() override = default;
731 
736  list_scalar(list_scalar&& other) = default;
737 
738  list_scalar& operator=(list_scalar const& other) = delete;
739  list_scalar& operator=(list_scalar&& other) = delete;
740 
748  list_scalar(list_scalar const& other,
750  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
751 
763  bool is_valid = true,
765  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
766 
776  bool is_valid = true,
778  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
779 
784  [[nodiscard]] column_view view() const;
785 
786  private:
787  cudf::column _data;
788 };
789 
793 class struct_scalar : public scalar {
794  public:
795  struct_scalar() = delete;
796  ~struct_scalar() override = default;
797 
802  struct_scalar(struct_scalar&& other) = default;
803  struct_scalar& operator=(struct_scalar const& other) = delete;
804  struct_scalar& operator=(struct_scalar&& other) = delete;
805 
815  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
816 
828  bool is_valid = true,
830  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
831 
843  bool is_valid = true,
845  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
846 
859  bool is_valid = true,
861  rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
862 
867  [[nodiscard]] table_view view() const;
868 
869  private:
870  table _data;
871 
875  void assert_valid_size();
876 
886  static table init_data(table&& data,
887  bool is_valid,
888  rmm::cuda_stream_view stream,
890 };
891  // end of group
893 } // namespace cudf
cudf::duration_scalar::duration_scalar
duration_scalar(duration_scalar &&other)=default
Move constructor for duration_scalar.
cudf::list_scalar::list_scalar
list_scalar(cudf::column_view const &data, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new list scalar object from column_view.
per_device_resource.hpp
cudf::struct_scalar::struct_scalar
struct_scalar(table &&data, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new struct scalar object from an existing table in device memory.
cudf::detail::fixed_width_scalar::value_type
T value_type
Type of the value held by the scalar.
Definition: scalar.hpp:146
cudf::column
A container of nullable device data as a column of elements.
Definition: column.hpp:48
cudf::string_scalar::data
char const * data() const
Returns a raw pointer to the string in device memory.
cudf::numeric_scalar::numeric_scalar
numeric_scalar(numeric_scalar &&other)=default
Move constructor for numeric_scalar.
cudf::timestamp_scalar
An owning class to represent a timestamp value in device memory.
Definition: scalar.hpp:624
cudf::scalar::validity_data
bool * validity_data()
Returns a raw pointer to the validity bool in device memory.
cudf::timestamp_scalar::timestamp_scalar
timestamp_scalar(timestamp_scalar &&other)=default
Move constructor for timestamp_scalar.
cudf::duration_scalar::rep_type
typename T::rep rep_type
The duration's underlying representation type.
Definition: scalar.hpp:683
cudf::detail::fixed_width_scalar::data
T const * data() const
Returns a const raw pointer to the value in device memory.
cudf::size_type
int32_t size_type
Row index type for columns and tables.
Definition: types.hpp:80
column.hpp
Class definition for cudf::column.
cudf::detail::fixed_width_scalar::set_value
void set_value(T value, rmm::cuda_stream_view stream=cudf::get_default_stream())
Set the value of the scalar.
cudf::string_scalar::string_scalar
string_scalar(std::string const &string, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new string scalar object.
cudf::fixed_point_scalar::value_type
T value_type
The value type of the fixed_point number.
Definition: scalar.hpp:308
cudf::duration_scalar::duration_scalar
duration_scalar(rep_type value, bool is_valid, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new duration scalar object from tick counts.
cudf::fixed_point_scalar::fixed_point_scalar
fixed_point_scalar(T value, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new fixed_point scalar object from a fixed_point number.
cudf::scalar::_is_valid
rmm::device_scalar< bool > _is_valid
Device bool signifying validity.
Definition: scalar.hpp:97
cudf::column_view
A non-owning, immutable view of device data as a column of elements, some of which may be null as ind...
Definition: column_view.hpp:313
cudf::fixed_point_scalar::fixed_point_scalar
fixed_point_scalar(fixed_point_scalar &&other)=default
Move constructor for fixed_point_scalar.
cudf::scalar::scalar
scalar(scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new scalar object by deep copying another.
cudf::scalar::_type
data_type _type
Logical type of value in the scalar.
Definition: scalar.hpp:96
cudf::host_span
C++20 std::span with reduced feature set.
Definition: span.hpp:210
types.hpp
Type declarations for libcudf.
rmm
cudf::struct_scalar::struct_scalar
struct_scalar(struct_scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new struct scalar object by deep copying another.
cudf::string_scalar::string_scalar
string_scalar(string_scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new string scalar object by deep copying another string_scalar.
cudf::string_view
A non-owning, immutable view of device data that is a variable length char array representing a UTF-8...
Definition: string_view.hpp:44
cudf::timestamp_scalar::rep_type
typename T::rep rep_type
The underlying representation type of the timestamp.
Definition: scalar.hpp:628
cudf::list_scalar::list_scalar
list_scalar(cudf::column &&data, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new list scalar object from existing column.
rmm::cuda_stream_view
cudf::chrono_scalar::chrono_scalar
chrono_scalar(rmm::device_scalar< T > &&data, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new chrono scalar object from existing device memory.
cudf::struct_scalar
An owning class to represent a struct value in device memory.
Definition: scalar.hpp:793
cudf::table
A set of cudf::column's of the same size.
Definition: table.hpp:40
cudf::detail::fixed_width_scalar::fixed_width_scalar
fixed_width_scalar(rmm::device_scalar< T > &&data, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new fixed width scalar object from existing device memory.
cudf::numeric_scalar::numeric_scalar
numeric_scalar(rmm::device_scalar< T > &&data, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new numeric scalar object from existing device memory.
cudf::fixed_point_scalar::data
rep_type * data()
Returns a raw pointer to the value in device memory.
cudf::duration_scalar::count
rep_type count()
Returns the duration in number of ticks.
cudf::fixed_point_scalar::_data
rmm::device_scalar< rep_type > _data
device memory containing the value
Definition: scalar.hpp:423
cudf::scalar::set_valid_async
void set_valid_async(bool is_valid, rmm::cuda_stream_view stream=cudf::get_default_stream())
Updates the validity of the value.
cudf::numeric_scalar::numeric_scalar
numeric_scalar(T value, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new numeric scalar object.
cudf::fixed_point_scalar::data
rep_type const * data() const
Returns a const raw pointer to the value in device memory.
cudf::string_scalar::to_string
std::string to_string(rmm::cuda_stream_view stream=cudf::get_default_stream()) const
Get the value of the scalar in a host std::string.
cudf::scalar::is_valid
bool is_valid(rmm::cuda_stream_view stream=cudf::get_default_stream()) const
Indicates whether the scalar contains a valid value.
cudf::duration_scalar
An owning class to represent a duration value in device memory.
Definition: scalar.hpp:679
cudf::numeric_scalar::numeric_scalar
numeric_scalar(numeric_scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new numeric scalar object by deep copying another.
rmm::device_buffer
cudf::fixed_point_scalar::fixed_point_scalar
fixed_point_scalar(rep_type value, numeric::scale_type scale, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new fixed_point scalar object from already shifted value and scale.
cudf::chrono_scalar::chrono_scalar
chrono_scalar(chrono_scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new chrono scalar object by deep copying another.
cudf::string_scalar::string_scalar
string_scalar(rmm::device_scalar< value_type > &data, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new string scalar object from string_view in device memory.
device_buffer.hpp
cudf::list_scalar::list_scalar
list_scalar(list_scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new list scalar object by deep copying another.
cudf::fixed_point_scalar::fixed_point_scalar
fixed_point_scalar(fixed_point_scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new fixed_point scalar object by deep copying another.
cudf::scalar
An owning class to represent a singular value.
Definition: scalar.hpp:48
cudf::numeric_scalar
An owning class to represent a numerical value in device memory.
Definition: scalar.hpp:243
cudf::table_view
A set of cudf::column_view's of the same size.
Definition: table_view.hpp:187
cudf::detail::fixed_width_scalar
An owning class to represent a fixed-width type value in device memory.
Definition: scalar.hpp:142
cudf::data_type
Indicator for the logical data type of an element in a column.
Definition: types.hpp:228
cudf::detail::fixed_width_scalar::fixed_width_scalar
fixed_width_scalar(fixed_width_scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new fixed-width scalar object by deep copying another.
cudf::detail::fixed_width_scalar::_data
rmm::device_scalar< T > _data
device memory containing the value
Definition: scalar.hpp:204
cudf::string_scalar::value
value_type value(rmm::cuda_stream_view stream=cudf::get_default_stream()) const
Get the value of the scalar as a string_view.
cudf::fixed_point_scalar
An owning class to represent a fixed_point number in device memory.
Definition: scalar.hpp:303
cudf::chrono_scalar
An owning class to represent a timestamp/duration value in device memory.
Definition: scalar.hpp:563
cudf::timestamp_scalar::ticks_since_epoch
rep_type ticks_since_epoch()
Returns the duration in number of ticks since the UNIX epoch.
cudf::detail::fixed_width_scalar::data
T * data()
Returns a raw pointer to the value in device memory.
cudf::fixed_point_scalar::fixed_point_value
T fixed_point_value(rmm::cuda_stream_view stream=cudf::get_default_stream()) const
Get the decimal32, decimal64 or decimal128.
cudf::fixed_point_scalar::fixed_point_scalar
fixed_point_scalar(rep_type value, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new fixed_point scalar object from a value and default 0-scale.
cudf
cuDF interfaces
Definition: aggregation.hpp:34
cudf::string_scalar::size
size_type size() const
Returns the size of the string in bytes.
cudf::detail::fixed_width_scalar::value
T value(rmm::cuda_stream_view stream=cudf::get_default_stream()) const
Get the value of the scalar.
cudf::list_scalar
An owning class to represent a list value in device memory.
Definition: scalar.hpp:727
cudf::scalar::scalar
scalar(data_type type, bool is_valid=false, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new scalar object.
rmm::device_scalar< bool >
cudf::detail::fixed_width_scalar::fixed_width_scalar
fixed_width_scalar(T value, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new fixed width scalar object.
cudf::fixed_point_scalar::value
rep_type value(rmm::cuda_stream_view stream=cudf::get_default_stream()) const
Get the value of the scalar.
cudf::string_scalar::string_scalar
string_scalar(string_scalar &&other)=default
Move constructor for string_scalar.
cudf::struct_scalar::view
table_view view() const
Returns a non-owning, immutable view to underlying device data.
cudf::chrono_scalar::chrono_scalar
chrono_scalar(T value, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new chrono scalar object.
cudf::string_scalar::string_scalar
string_scalar(rmm::device_buffer &&data, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new string scalar object by moving an existing string data buffer.
cudf::get_default_stream
rmm::cuda_stream_view const get_default_stream()
Get the current default stream.
table.hpp
Class definition for cudf::table.
cudf::string_scalar
An owning class to represent a string in device memory.
Definition: scalar.hpp:429
cudf::scalar::scalar
scalar(scalar &&other)=default
Move constructor for scalar.
cudf::fixed_point_scalar::fixed_point_scalar
fixed_point_scalar(rmm::device_scalar< rep_type > &&data, numeric::scale_type scale, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new fixed_point scalar object from existing device memory.
cudf::detail::fixed_width_scalar::fixed_width_scalar
fixed_width_scalar(fixed_width_scalar &&other)=default
Move constructor for fixed_width_scalar.
cudf::list_scalar::list_scalar
list_scalar(list_scalar &&other)=default
Move constructor for list_scalar.
cudf::chrono_scalar::chrono_scalar
chrono_scalar(chrono_scalar &&other)=default
Move constructor for chrono_scalar.
cudf::struct_scalar::struct_scalar
struct_scalar(table_view const &data, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new struct scalar object from table_view.
cudf::string_scalar::string_scalar
string_scalar(value_type const &source, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new string scalar object from string_view.
cudf::list_scalar::view
column_view view() const
Returns a non-owning, immutable view to underlying device data.
cudf::fixed_point_scalar::rep_type
typename T::rep rep_type
The representation type of the fixed_point number.
Definition: scalar.hpp:307
cudf::scalar::type
data_type type() const noexcept
Returns the scalar's logical value type.
rmm::mr::device_memory_resource
traits.hpp
cudf::duration_scalar::duration_scalar
duration_scalar(duration_scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new duration scalar object by deep copying another.
cudf::struct_scalar::struct_scalar
struct_scalar(struct_scalar &&other)=default
Move constructor for struct_scalar.
cudf::timestamp_scalar::timestamp_scalar
timestamp_scalar(Duration2 const &value, bool is_valid, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new timestamp scalar object from a duration that is convertible to T::duration.
cudf::struct_scalar::struct_scalar
struct_scalar(host_span< column_view const > data, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new struct scalar object from a host_span of column_views.
numeric::scale_type
scale_type
The scale type for fixed_point.
Definition: fixed_point.hpp:35
cudf::timestamp_scalar::timestamp_scalar
timestamp_scalar(timestamp_scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
Construct a new timestamp scalar object by deep copying another.
cudf::string_scalar::_data
rmm::device_buffer _data
device memory containing the string
Definition: scalar.hpp:553