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file  dictionary/search.hpp
 

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std::unique_ptr< scalarcudf::dictionary::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...
 

Detailed Description

Function Documentation

◆ get_index()

std::unique_ptr<scalar> cudf::dictionary::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.

If the key does not exist in the dictionary the returned scalar will have is_valid()==false

Exceptions
cudf::logic_errorif key.type() != dictionary.keys().type()
Parameters
dictionaryThe dictionary to search for the key.
keyThe value to search for in the dictionary keyset.
streamCUDA stream used for device memory operations and kernel launches.
mrDevice memory resource used to allocate the returned scalar's device memory.
Returns
Numeric scalar index value of the key within the dictionary.