Dictionary column APIs. More...
Functions | |
| std::unique_ptr< column > | encode (column_view const &column, data_type indices_type=data_type{type_id::UINT32}, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref()) |
| Construct a dictionary column by dictionary encoding an existing column. More... | |
| std::unique_ptr< column > | decode (dictionary_column_view const &dictionary_column, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref()) |
| Create a column by gathering the keys from the provided dictionary_column into a new column using the indices from that column. More... | |
| std::unique_ptr< scalar > | get_index (dictionary_column_view const &dictionary, scalar const &key, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref()) |
| Return the index value for a given key. More... | |
| std::unique_ptr< column > | add_keys (dictionary_column_view const &dictionary_column, column_view const &new_keys, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref()) |
| Create a new dictionary column by adding the new keys elements to the existing dictionary_column. More... | |
| std::unique_ptr< column > | remove_keys (dictionary_column_view const &dictionary_column, column_view const &keys_to_remove, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref()) |
| Create a new dictionary column by removing the specified keys from the existing dictionary_column. More... | |
| std::unique_ptr< column > | remove_unused_keys (dictionary_column_view const &dictionary_column, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref()) |
| Create a new dictionary column by removing any keys that are not referenced by any of the indices. More... | |
| std::unique_ptr< column > | set_keys (dictionary_column_view const &dictionary_column, column_view const &keys, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref()) |
| Create a new dictionary column by applying only the specified keys to the existing dictionary_column. More... | |
| std::vector< std::unique_ptr< column > > | match_dictionaries (cudf::host_span< dictionary_column_view const > input, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref()) |
| Create new dictionaries that have keys merged from the input dictionaries. More... | |
Dictionary column APIs.
1.9.1