KeyComparator< KeyT > Struct Template Reference

Public Member Functions
DEVICE	KeyComparator (const HeapOrdering hp_order, const bool nullable, const KeyT null_val, const NullsOrdering null_order)
ALWAYS_INLINE DEVICE bool	operator() (const KeyT lhs, const KeyT rhs) const

Public Attributes
const HeapOrdering	heap_ordering
const bool	has_nulls
const KeyT	null_key
const NullsOrdering	nulls_ordering

Detailed Description

template<typename KeyT = int64_t>
struct KeyComparator< KeyT >

Definition at line 46 of file TopKRuntime.cpp.

Constructor & Destructor Documentation

template<typename KeyT = int64_t>

DEVICE KeyComparator< KeyT >::KeyComparator ( const HeapOrdering  hp_order, const bool  nullable, const KeyT  null_val, const NullsOrdering  null_order  )

inline

Definition at line 47 of file TopKRuntime.cpp.

      : heap_ordering(hp_order)
      , has_nulls(nullable)
      , null_key(null_val)
      , nulls_ordering(null_order) {}

Member Function Documentation

template<typename KeyT = int64_t>

ALWAYS_INLINE DEVICE bool KeyComparator< KeyT >::operator() ( const KeyT  lhs, const KeyT  rhs  ) const

inline

Definition at line 55 of file TopKRuntime.cpp.

References FIRST, KeyComparator< KeyT >::has_nulls, KeyComparator< KeyT >::heap_ordering, MIN, KeyComparator< KeyT >::null_key, and KeyComparator< KeyT >::nulls_ordering.

                                                                             {
    if (has_nulls) {
      if (nulls_ordering == NullsOrdering::FIRST) {
        if (rhs == null_key) {
          return true;
        }
        if (lhs == null_key) {
          return false;
        }
      } else {
        if (lhs == null_key) {
          return true;
        }
        if (rhs == null_key) {
          return false;
        }
      }
    }
    return heap_ordering == HeapOrdering::MIN ? (lhs < rhs) : (lhs > rhs);
  }

Member Data Documentation

template<typename KeyT = int64_t>

const bool KeyComparator< KeyT >::has_nulls

Definition at line 76 of file TopKRuntime.cpp.

Referenced by KeyComparator< KeyT >::operator()().

template<typename KeyT = int64_t>

const HeapOrdering KeyComparator< KeyT >::heap_ordering

Definition at line 75 of file TopKRuntime.cpp.

Referenced by KeyComparator< KeyT >::operator()().

template<typename KeyT = int64_t>

const KeyT KeyComparator< KeyT >::null_key

Definition at line 77 of file TopKRuntime.cpp.

Referenced by KeyComparator< KeyT >::operator()().

template<typename KeyT = int64_t>

const NullsOrdering KeyComparator< KeyT >::nulls_ordering

Definition at line 78 of file TopKRuntime.cpp.

Referenced by KeyComparator< KeyT >::operator()().

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The documentation for this struct was generated from the following file:

• /home/jenkins-slave/workspace/core-os-doxygen/QueryEngine/TopKRuntime.cpp