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Update ColumnsHashing.h

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alexey-milovidov 2019-02-06 19:58:27 +03:00 committed by GitHub
parent a249fc7788
commit ba01f7fd77
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1 changed files with 5 additions and 5 deletions
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10
dbms/src/Common/ColumnsHashing.h
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@ -19,7 +19,7 @@ namespace DB
namespace ColumnsHashing namespace ColumnsHashing
{ {
/// For the case where there is one numeric key. /// For the case when there is one numeric key.
/// UInt8/16/32/64 for any type with corresponding bit width. /// UInt8/16/32/64 for any type with corresponding bit width.
template <typename Value, typename Mapped, typename FieldType, bool use_cache = true> template <typename Value, typename Mapped, typename FieldType, bool use_cache = true>
struct HashMethodOneNumber struct HashMethodOneNumber
@ -61,7 +61,7 @@ struct HashMethodOneNumber
}; };
/// For the case where there is one string key. /// For the case when there is one string key.
template <typename Value, typename Mapped, bool place_string_to_arena = true, bool use_cache = true> template <typename Value, typename Mapped, bool place_string_to_arena = true, bool use_cache = true>
struct HashMethodString struct HashMethodString
: public columns_hashing_impl::HashMethodBase<HashMethodString<Value, Mapped, place_string_to_arena, use_cache>, Value, Mapped, use_cache> : public columns_hashing_impl::HashMethodBase<HashMethodString<Value, Mapped, place_string_to_arena, use_cache>, Value, Mapped, use_cache>
@ -101,7 +101,7 @@ protected:
}; };
/// For the case where there is one fixed-length string key. /// For the case when there is one fixed-length string key.
template <typename Value, typename Mapped, bool place_string_to_arena = true, bool use_cache = true> template <typename Value, typename Mapped, bool place_string_to_arena = true, bool use_cache = true>
struct HashMethodFixedString struct HashMethodFixedString
: public columns_hashing_impl::HashMethodBase<HashMethodFixedString<Value, Mapped, place_string_to_arena, use_cache>, Value, Mapped, use_cache> : public columns_hashing_impl::HashMethodBase<HashMethodFixedString<Value, Mapped, place_string_to_arena, use_cache>, Value, Mapped, use_cache>
@ -445,7 +445,7 @@ struct LowCardinalityKeys
template <> template <>
struct LowCardinalityKeys<false> {}; struct LowCardinalityKeys<false> {};
/// For the case where all keys are of fixed length, and they fit in N (for example, 128) bits. /// For the case when all keys are of fixed length, and they fit in N (for example, 128) bits.
template <typename Value, typename Key, typename Mapped, bool has_nullable_keys_ = false, bool has_low_cardinality_ = false, bool use_cache = true> template <typename Value, typename Key, typename Mapped, bool has_nullable_keys_ = false, bool has_low_cardinality_ = false, bool use_cache = true>
struct HashMethodKeysFixed struct HashMethodKeysFixed
: private columns_hashing_impl::BaseStateKeysFixed<Key, has_nullable_keys_> : private columns_hashing_impl::BaseStateKeysFixed<Key, has_nullable_keys_>
@ -531,7 +531,7 @@ protected:
static ALWAYS_INLINE void onExistingKey(StringRef & key, Arena & pool) { pool.rollback(key.size); } static ALWAYS_INLINE void onExistingKey(StringRef & key, Arena & pool) { pool.rollback(key.size); }
}; };
/// For the case where there is one string key. /// For the case when there is one string key.
template <typename Value, typename Mapped, bool use_cache = true> template <typename Value, typename Mapped, bool use_cache = true>
struct HashMethodHashed struct HashMethodHashed
: public columns_hashing_impl::HashMethodBase<HashMethodHashed<Value, Mapped, use_cache>, Value, Mapped, use_cache> : public columns_hashing_impl::HashMethodBase<HashMethodHashed<Value, Mapped, use_cache>, Value, Mapped, use_cache>