Functions
cudf::dictionary Namespace Reference

Dictionary column APIs. More...

Functions

std::unique_ptr< columnencode (column_view const &column, data_type indices_type=data_type{type_id::UINT32}, rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
 Construct a dictionary column by dictionary encoding an existing column. More...
 
std::unique_ptr< columndecode (dictionary_column_view const &dictionary_column, rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
 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< scalarget_index (dictionary_column_view const &dictionary, scalar const &key, rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
 Return the index value for a given key. More...
 
std::unique_ptr< columnadd_keys (dictionary_column_view const &dictionary_column, column_view const &new_keys, rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
 Create a new dictionary column by adding the new keys elements to the existing dictionary_column. More...
 
std::unique_ptr< columnremove_keys (dictionary_column_view const &dictionary_column, column_view const &keys_to_remove, rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
 Create a new dictionary column by removing the specified keys from the existing dictionary_column. More...
 
std::unique_ptr< columnremove_unused_keys (dictionary_column_view const &dictionary_column, rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
 Create a new dictionary column by removing any keys that are not referenced by any of the indices. More...
 
std::unique_ptr< columnset_keys (dictionary_column_view const &dictionary_column, column_view const &keys, rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
 Create a new dictionary column by applying only the specified keys to the existing dictionary_column. More...
 

Detailed Description

Dictionary column APIs.