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Fix for specialized dispatch changes in row hasher #2133

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Fix for specialized dispatch changes in row hasher #2133

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b3af009
added support for specializing dispatch for hasher
tgujar Jun 7, 2024
a2be671
Merge branch 'NVIDIA:branch-24.08' into hash-occupancy-jni
tgujar Jul 26, 2024
22b2654
Merge branch 'branch-24.10' into hash-occupancy-jni
tgujar Jul 26, 2024
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9 changes: 7 additions & 2 deletions src/main/cpp/src/murmur_hash.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -60,10 +60,15 @@ namespace {
* @tparam hash_function Hash functor to use for hashing elements. Must be SparkMurmurHash3_32.
* @tparam Nullate A cudf::nullate type describing whether to check for nulls.
*/
template <template <typename> class hash_function, typename Nullate>
template <template <typename> class hash_function,
typename Nullate,
template <typename> typename dispatch_conditional_t = cudf::experimental::type_identity_t>
class murmur_device_row_hasher {
friend class cudf::experimental::row::hash::row_hasher; ///< Allow row_hasher to access private
///< members.
template <cudf::type_id T>
using dispatch_conditional =
cudf::experimental::transform_sequence<cudf::id_to_type<T>, dispatch_conditional_t>;

public:
/**
Expand All @@ -80,7 +85,7 @@ class murmur_device_row_hasher {
_seed,
cuda::proclaim_return_type<murmur_hash_value_type>(
[row_index, nulls = this->_check_nulls] __device__(auto hash, auto column) {
return cudf::type_dispatcher(
return cudf::type_dispatcher<dispatch_conditional>(
column.type(), element_hasher_adapter<hash_function>{nulls, hash}, column, row_index);
}));
}
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