mirror of
https://github.com/ClickHouse/ClickHouse.git
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ngram vector_vector distance added
This commit is contained in:
Danila Kutenin
parent
0bb10c7f76
commit
f613c06c47
@ -164,43 +164,46 @@ struct NgramDistanceImpl
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return num;
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}
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template <bool SaveNgrams>
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static ALWAYS_INLINE inline size_t calculateNeedleStats(
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const char * data,
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const size_t size,
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NgramStats & ngram_stats,
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[[maybe_unused]] UInt16 * ngram_storage,
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size_t (*read_code_points)(CodePoint *, const char *&, const char *),
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UInt16 (*hash_functor)(const CodePoint *))
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{
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// To prevent size_t overflow below.
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if (size < N)
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return 0;
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const char * start = data;
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const char * end = data + size;
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CodePoint cp[simultaneously_codepoints_num] = {};
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/// read_code_points returns the position of cp where it stopped reading codepoints.
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size_t found = read_code_points(cp, start, end);
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/// We need to start for the first time here, because first N - 1 codepoints mean nothing.
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size_t i = N - 1;
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/// Initialize with this value because for the first time `found` does not initialize first N - 1 codepoints.
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size_t len = -N + 1;
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size_t len = 0;
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do
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{
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len += found - N + 1;
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for (; i + N <= found; ++i)
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++ngram_stats[hash_functor(cp + i)];
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{
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++len;
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UInt16 hash = hash_functor(cp + i);
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if constexpr (SaveNgrams)
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*ngram_storage++ = hash;
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++ngram_stats[hash];
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}
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i = 0;
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} while (start < end && (found = read_code_points(cp, start, end)));
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return len;
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}
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template <bool ReuseStats>
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static ALWAYS_INLINE inline UInt64 calculateHaystackStatsAndMetric(
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const char * data,
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const size_t size,
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NgramStats & ngram_stats,
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size_t & distance,
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[[maybe_unused]] UInt16 * ngram_storage,
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size_t (*read_code_points)(CodePoint *, const char *&, const char *),
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UInt16 (*hash_functor)(const CodePoint *))
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{
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@ -209,18 +212,6 @@ struct NgramDistanceImpl
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const char * end = data + size;
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CodePoint cp[simultaneously_codepoints_num] = {};
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/// allocation tricks, most strings are relatively small
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static constexpr size_t small_buffer_size = 256;
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std::unique_ptr<UInt16[]> big_buffer;
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UInt16 small_buffer[small_buffer_size];
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UInt16 * ngram_storage = small_buffer;
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if (size > small_buffer_size)
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{
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ngram_storage = new UInt16[size];
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big_buffer.reset(ngram_storage);
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}
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/// read_code_points returns the position of cp where it stopped reading codepoints.
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size_t found = read_code_points(cp, start, end);
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/// We need to start for the first time here, because first N - 1 codepoints mean nothing.
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@ -235,21 +226,25 @@ struct NgramDistanceImpl
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--distance;
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else
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++distance;
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ngram_storage[ngram_cnt++] = hash;
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if constexpr (ReuseStats)
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ngram_storage[ngram_cnt] = hash;
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++ngram_cnt;
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--ngram_stats[hash];
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}
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iter = 0;
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} while (start < end && (found = read_code_points(cp, start, end)));
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/// Return the state of hash map to its initial.
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for (size_t i = 0; i < ngram_cnt; ++i)
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++ngram_stats[ngram_storage[i]];
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if constexpr (ReuseStats)
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{
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for (size_t i = 0; i < ngram_cnt; ++i)
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++ngram_stats[ngram_storage[i]];
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}
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return ngram_cnt;
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}
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template <class Callback, class... Args>
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static inline size_t dispatchSearcher(Callback callback, Args &&... args)
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static inline auto dispatchSearcher(Callback callback, Args &&... args)
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{
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if constexpr (!UTF8)
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return callback(std::forward<Args>(args)..., readASCIICodePoints, ASCIIHash);
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@ -268,11 +263,11 @@ struct NgramDistanceImpl
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needle.resize(needle_size + default_padding);
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data.resize(data_size + default_padding);
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size_t second_size = dispatchSearcher(calculateNeedleStats, needle.data(), needle_size, common_stats);
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size_t second_size = dispatchSearcher(calculateNeedleStats<false>, needle.data(), needle_size, common_stats, nullptr);
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size_t distance = second_size;
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if (data_size <= max_string_size)
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{
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size_t first_size = dispatchSearcher(calculateHaystackStatsAndMetric, data.data(), data_size, common_stats, distance);
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size_t first_size = dispatchSearcher(calculateHaystackStatsAndMetric<false>, data.data(), data_size, common_stats, distance, nullptr);
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res = distance * 1.f / std::max(first_size + second_size, size_t(1));
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}
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else
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@ -281,18 +276,94 @@ struct NgramDistanceImpl
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}
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}
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static void vector_vector(
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const ColumnString::Chars & haystack_data,
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const ColumnString::Offsets & haystack_offsets,
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const ColumnString::Chars & needle_data,
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const ColumnString::Offsets & needle_offsets,
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PaddedPODArray<Float32> & res)
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{
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const size_t haystack_offsets_size = haystack_offsets.size();
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size_t prev_haystack_offset = 0;
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size_t prev_needle_offset = 0;
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NgramStats common_stats;
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memset(common_stats, 0, sizeof(common_stats));
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/// The main motivation is to not allocate more on stack because we have already allocated a lot (128Kb).
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/// And we can reuse these storages in one thread because we care only about what was written to first places.
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std::unique_ptr<UInt16[]> needle_ngram_storage;
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std::unique_ptr<UInt16[]> haystack_ngram_storage;
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needle_ngram_storage.reset(new UInt16[max_string_size]);
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haystack_ngram_storage.reset(new UInt16[max_string_size]);
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for (size_t i = 0; i < haystack_offsets_size; ++i)
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{
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const char * haystack = reinterpret_cast<const char *>(&haystack_data[prev_haystack_offset]);
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const size_t haystack_size = haystack_offsets[i] - prev_haystack_offset - 1;
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const char * needle = reinterpret_cast<const char *>(&needle_data[prev_needle_offset]);
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const size_t needle_size = needle_offsets[i] - prev_needle_offset - 1;
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if (needle_size <= max_string_size && haystack_size <= max_string_size)
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{
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/// Get needle stats.
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const size_t needle_stats_size = dispatchSearcher(
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calculateNeedleStats<true>,
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needle,
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needle_size,
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common_stats,
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needle_ngram_storage.get());
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size_t distance = needle_stats_size;
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/// Combine with haystack stats, return to initial needle stats.
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const size_t haystack_stats_size = dispatchSearcher(
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calculateHaystackStatsAndMetric<true>,
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haystack,
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haystack_size,
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common_stats,
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distance,
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haystack_ngram_storage.get());
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/// Return to zero array stats.
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for (size_t j = 0; j < needle_stats_size; ++j)
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--common_stats[needle_ngram_storage[j]];
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/// For now, common stats is a zero array.
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res[i] = distance * 1.f / std::max(haystack_stats_size + needle_stats_size, size_t(1));
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}
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else
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{
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/// String are too big, we are assuming they are not the same. This is done because of limiting number
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/// of bigrams added and not allocating too much memory.
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res[i] = 1.f;
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}
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prev_needle_offset = needle_offsets[i];
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prev_haystack_offset = haystack_offsets[i];
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}
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}
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static void vector_constant(
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const ColumnString::Chars & data, const ColumnString::Offsets & offsets, std::string needle, PaddedPODArray<Float32> & res)
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const ColumnString::Chars & data,
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const ColumnString::Offsets & offsets,
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std::string needle,
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PaddedPODArray<Float32> & res)
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{
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/// zeroing our map
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NgramStats common_stats;
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memset(common_stats, 0, sizeof(common_stats));
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/// The main motivation is to not allocate more on stack because we have already allocated a lot (128Kb).
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/// And we can reuse these storages in one thread because we care only about what was written to first places.
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std::unique_ptr<UInt16[]> ngram_storage;
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ngram_storage.reset(new UInt16[max_string_size]);
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/// We use unsafe versions of getting ngrams, so I decided to use padded_data even in needle case.
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const size_t needle_size = needle.size();
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needle.resize(needle_size + default_padding);
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const size_t needle_stats_size = dispatchSearcher(calculateNeedleStats, needle.data(), needle_size, common_stats);
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const size_t needle_stats_size = dispatchSearcher(calculateNeedleStats<false>, needle.data(), needle_size, common_stats, nullptr);
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size_t distance = needle_stats_size;
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size_t prev_offset = 0;
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@ -303,7 +374,11 @@ struct NgramDistanceImpl
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if (haystack_size <= max_string_size)
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{
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size_t haystack_stats_size = dispatchSearcher(
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calculateHaystackStatsAndMetric, reinterpret_cast<const char *>(haystack), haystack_size, common_stats, distance);
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calculateHaystackStatsAndMetric<true>,
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reinterpret_cast<const char *>(haystack),
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haystack_size, common_stats,
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distance,
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ngram_storage.get());
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res[i] = distance * 1.f / std::max(haystack_stats_size + needle_stats_size, size_t(1));
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}
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else
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@ -62,10 +62,7 @@ public:
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const ColumnConst * col_haystack_const = typeid_cast<const ColumnConst *>(&*column_haystack);
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const ColumnConst * col_needle_const = typeid_cast<const ColumnConst *>(&*column_needle);
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if (!col_needle_const)
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throw Exception("Second argument of function " + getName() + " must be constant string.", ErrorCodes::ILLEGAL_COLUMN);
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if (col_haystack_const)
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if (col_haystack_const && col_needle_const)
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{
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ResultType res{};
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const String & needle = col_needle_const->getValue<String>();
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@ -88,8 +85,9 @@ public:
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vec_res.resize(column_haystack->size());
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const ColumnString * col_haystack_vector = checkAndGetColumn<ColumnString>(&*column_haystack);
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const ColumnString * col_needle_vector = checkAndGetColumn<ColumnString>(&*column_needle);
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if (col_haystack_vector)
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if (col_haystack_vector && col_needle_const)
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{
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const String & needle = col_needle_const->getValue<String>();
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if (needle.size() > Impl::max_string_size)
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@ -101,6 +99,27 @@ public:
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}
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Impl::vector_constant(col_haystack_vector->getChars(), col_haystack_vector->getOffsets(), needle, vec_res);
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}
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else if (col_haystack_vector && col_needle_vector)
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{
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Impl::vector_vector(
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col_haystack_vector->getChars(),
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col_haystack_vector->getOffsets(),
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col_needle_vector->getChars(),
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col_needle_vector->getOffsets(),
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vec_res);
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}
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else if (col_haystack_const && col_needle_vector)
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{
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const String & needle = col_haystack_const->getValue<String>();
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if (needle.size() > Impl::max_string_size)
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{
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throw Exception(
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"String size of needle is too big for function " + getName() + ". Should be at most "
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+ std::to_string(Impl::max_string_size),
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ErrorCodes::TOO_LARGE_STRING_SIZE);
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}
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Impl::vector_constant(col_needle_vector->getChars(), col_needle_vector->getOffsets(), needle, vec_res);
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}
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else
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{
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throw Exception(
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@ -21,13 +21,16 @@
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<total_time_ms>60000</total_time_ms>
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</any_of>
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</stop_conditions>
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<query>SELECT DISTINCT URL,Title, ngramDistance(Title, URL) AS distance FROM hits_100m_single ORDER BY distance ASC LIMIT 50</query>
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<query>SELECT DISTINCT SearchPhrase,Title, ngramDistance(Title, SearchPhrase) AS distance FROM hits_100m_single ORDER BY distance ASC LIMIT 50</query>
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<query>SELECT DISTINCT Title, ngramDistance(Title, 'what is love') AS distance FROM hits_100m_single ORDER BY distance ASC LIMIT 50</query>
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<query>SELECT DISTINCT Title, ngramDistance(Title, 'baby dont hurt me') AS distance FROM hits_100m_single ORDER BY distance ASC LIMIT 50</query>
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<query>SELECT DISTINCT Title, ngramDistance(Title, 'no more') AS distance FROM hits_100m_single ORDER BY distance ASC LIMIT 50</query>
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<query>SELECT DISTINCT Title, ngramDistanceCaseInsensitive(Title, 'wHAt Is lovE') AS distance FROM hits_100m_single ORDER BY distance ASC LIMIT 50</query>
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<query>SELECT DISTINCT Title, ngramDistanceCaseInsensitive(Title, 'BABY DonT hUrT me') AS distance FROM hits_100m_single ORDER BY distance ASC LIMIT 50</query>
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<query>SELECT DISTINCT Title, ngramDistanceCaseInsensitive(Title, 'nO MOrE') AS distance FROM hits_100m_single ORDER BY distance ASC LIMIT 50</query>
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<query>SELECT DISTINCT URL,Title, ngramDistanceUTF8(Title, URL) AS distance FROM hits_100m_single ORDER BY distance ASC LIMIT 50</query>
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<query>SELECT DISTINCT SearchPhrase,Title, ngramDistanceUTF8(Title, SearchPhrase) AS distance FROM hits_100m_single ORDER BY distance ASC LIMIT 50</query>
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<query>SELECT DISTINCT Title, ngramDistanceUTF8(Title, 'метрика') AS distance FROM hits_100m_single ORDER BY distance ASC LIMIT 50</query>
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<query>SELECT DISTINCT URL, ngramDistanceUTF8(URL, 'как дела') AS distance FROM hits_100m_single ORDER BY distance ASC LIMIT 50</query>
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<query>SELECT DISTINCT URL, ngramDistanceUTF8(URL, 'чем занимаешься') AS distance FROM hits_100m_single ORDER BY distance ASC LIMIT 50</query>
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@ -33,6 +33,76 @@
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1000
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1000
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1000
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0
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1000
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1000
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@ -40,6 +110,39 @@
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77
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636
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1000
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привет как дела?... Херсон 0
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привет как дела клип - Яндекс.Видео 0
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привет 0
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пап привет как дела - Яндекс.Видео 0
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привет братан как дела - Яндекс.Видео 0
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http://metric.ru/ 0
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http://autometric.ru/ 0
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http://metrica.yandex.com/ 0
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http://metris.ru/ 0
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http://metrika.ru/ 0
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0
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0
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привет как дела?... Херсон 600
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пап привет как дела - Яндекс.Видео 684
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привет как дела клип - Яндекс.Видео 692
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привет братан как дела - Яндекс.Видео 707
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привет 1000
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http://metric.ru/ 1000
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http://autometric.ru/ 1000
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http://metrica.yandex.com/ 1000
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http://metris.ru/ 1000
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http://metrika.ru/ 1000
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0
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http://metric.ru/ 765
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http://metris.ru/ 765
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http://metrika.ru/ 778
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http://autometric.ru/ 810
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http://metrica.yandex.com/ 846
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привет как дела?... Херсон 1000
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привет как дела клип - Яндекс.Видео 1000
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привет 1000
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пап привет как дела - Яндекс.Видео 1000
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привет братан как дела - Яндекс.Видео 1000
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привет как дела?... Херсон 297
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пап привет как дела - Яндекс.Видео 422
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привет как дела клип - Яндекс.Видео 435
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@ -152,6 +255,76 @@ http://metrika.ru/ 1000
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1000
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1000
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1000
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1
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1
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1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
0
|
||||
1000
|
||||
1000
|
||||
@ -159,6 +332,39 @@ http://metrika.ru/ 1000
|
||||
77
|
||||
636
|
||||
1000
|
||||
привет как дела?... Херсон 0
|
||||
привет как дела клип - Яндекс.Видео 0
|
||||
привет 0
|
||||
пап привет как дела - Яндекс.Видео 0
|
||||
привет братан как дела - Яндекс.Видео 0
|
||||
http://metric.ru/ 0
|
||||
http://autometric.ru/ 0
|
||||
http://metrica.yandex.com/ 0
|
||||
http://metris.ru/ 0
|
||||
http://metrika.ru/ 0
|
||||
0
|
||||
0
|
||||
привет как дела?... Херсон 600
|
||||
пап привет как дела - Яндекс.Видео 684
|
||||
привет как дела клип - Яндекс.Видео 692
|
||||
привет братан как дела - Яндекс.Видео 707
|
||||
привет 1000
|
||||
http://metric.ru/ 1000
|
||||
http://autometric.ru/ 1000
|
||||
http://metrica.yandex.com/ 1000
|
||||
http://metris.ru/ 1000
|
||||
http://metrika.ru/ 1000
|
||||
0
|
||||
http://metric.ru/ 765
|
||||
http://metris.ru/ 765
|
||||
http://metrika.ru/ 778
|
||||
http://autometric.ru/ 810
|
||||
http://metrica.yandex.com/ 846
|
||||
привет как дела?... Херсон 1000
|
||||
привет как дела клип - Яндекс.Видео 1000
|
||||
привет 1000
|
||||
пап привет как дела - Яндекс.Видео 1000
|
||||
привет братан как дела - Яндекс.Видео 1000
|
||||
привет как дела?... Херсон 297
|
||||
пап привет как дела - Яндекс.Видео 422
|
||||
привет как дела клип - Яндекс.Видео 435
|
||||
@ -293,6 +499,76 @@ http://metrika.ru/ 1000
|
||||
1000
|
||||
1000
|
||||
1000
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
0
|
||||
0
|
||||
0
|
||||
@ -412,6 +688,76 @@ http://metrika.ru/ 1000
|
||||
1000
|
||||
1000
|
||||
1000
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
1
|
||||
0
|
||||
0
|
||||
0
|
||||
|
||||
@ -6,6 +6,22 @@ select round(1000 * ngramDistanceUTF8(materialize('абвгдеёжз'), 'абв
|
||||
select round(1000 * ngramDistanceUTF8(materialize('абвгдеёжз'), 'гдеёзд')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceUTF8(materialize('абвгдеёжз'), 'ёёёёёёёё')) from system.numbers limit 5;
|
||||
|
||||
select round(1000 * ngramDistanceUTF8(materialize(''), materialize('')))=round(1000 * ngramDistanceUTF8(materialize(''), '')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceUTF8(materialize('абв'), materialize('')))=round(1000 * ngramDistanceUTF8(materialize('абв'), '')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceUTF8(materialize(''), materialize('абв')))=round(1000 * ngramDistanceUTF8(materialize(''), 'абв')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceUTF8(materialize('абвгдеёжз'), materialize('абвгдеёжз')))=round(1000 * ngramDistanceUTF8(materialize('абвгдеёжз'), 'абвгдеёжз')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceUTF8(materialize('абвгдеёжз'), materialize('абвгдеёж')))=round(1000 * ngramDistanceUTF8(materialize('абвгдеёжз'), 'абвгдеёж')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceUTF8(materialize('абвгдеёжз'), materialize('гдеёзд')))=round(1000 * ngramDistanceUTF8(materialize('абвгдеёжз'), 'гдеёзд')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceUTF8(materialize('абвгдеёжз'), materialize('ёёёёёёёё')))=round(1000 * ngramDistanceUTF8(materialize('абвгдеёжз'), 'ёёёёёёёё')) from system.numbers limit 5;
|
||||
|
||||
select round(1000 * ngramDistanceUTF8('', materialize('')))=round(1000 * ngramDistanceUTF8(materialize(''), '')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceUTF8('абв', materialize('')))=round(1000 * ngramDistanceUTF8(materialize('абв'), '')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceUTF8('', materialize('абв')))=round(1000 * ngramDistanceUTF8(materialize(''), 'абв')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceUTF8('абвгдеёжз', materialize('абвгдеёжз')))=round(1000 * ngramDistanceUTF8(materialize('абвгдеёжз'), 'абвгдеёжз')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceUTF8('абвгдеёжз', materialize('абвгдеёж')))=round(1000 * ngramDistanceUTF8(materialize('абвгдеёжз'), 'абвгдеёж')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceUTF8('абвгдеёжз', materialize('гдеёзд')))=round(1000 * ngramDistanceUTF8(materialize('абвгдеёжз'), 'гдеёзд')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceUTF8('абвгдеёжз', materialize('ёёёёёёёё')))=round(1000 * ngramDistanceUTF8(materialize('абвгдеёжз'), 'ёёёёёёёё')) from system.numbers limit 5;
|
||||
|
||||
select round(1000 * ngramDistanceUTF8('', ''));
|
||||
select round(1000 * ngramDistanceUTF8('абв', ''));
|
||||
select round(1000 * ngramDistanceUTF8('', 'абв'));
|
||||
@ -18,6 +34,10 @@ drop table if exists test_distance;
|
||||
create table test_distance (Title String) engine = Memory;
|
||||
insert into test_distance values ('привет как дела?... Херсон'), ('привет как дела клип - Яндекс.Видео'), ('привет'), ('пап привет как дела - Яндекс.Видео'), ('привет братан как дела - Яндекс.Видео'), ('http://metric.ru/'), ('http://autometric.ru/'), ('http://metrica.yandex.com/'), ('http://metris.ru/'), ('http://metrika.ru/'), ('');
|
||||
|
||||
SELECT Title, round(1000 * distance) FROM test_distance ORDER BY ngramDistanceUTF8(Title, Title) as distance;
|
||||
SELECT Title, round(1000 * distance) FROM test_distance ORDER BY ngramDistanceUTF8(Title, extract(Title, 'как дела')) as distance;
|
||||
SELECT Title, round(1000 * distance) FROM test_distance ORDER BY ngramDistanceUTF8(Title, extract(Title, 'metr')) as distance;
|
||||
|
||||
SELECT Title, round(1000 * distance) FROM test_distance ORDER BY ngramDistanceUTF8(Title, 'привет как дела') as distance;
|
||||
SELECT Title, round(1000 * distance) FROM test_distance ORDER BY ngramDistanceUTF8(Title, 'как привет дела') as distance;
|
||||
SELECT Title, round(1000 * distance) FROM test_distance ORDER BY ngramDistanceUTF8(Title, 'metrika') as distance;
|
||||
@ -35,6 +55,23 @@ select round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('аБВГдеё
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('абвгдеёжз'), 'гдеёЗД')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('абвгдеёжз'), 'ЁЁЁЁЁЁЁЁ')) from system.numbers limit 5;
|
||||
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize(''),materialize(''))) = round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize(''), '')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('абв'),materialize(''))) = round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('абв'), '')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize(''), materialize('абв'))) = round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize(''), 'абв')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('абвГДЕёжз'), materialize('АбвгдЕёжз'))) = round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('абвГДЕёжз'), 'АбвгдЕёжз')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('аБВГдеёЖз'), materialize('АбвГдеёж'))) = round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('аБВГдеёЖз'), 'АбвГдеёж')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('абвгдеёжз'), materialize('гдеёЗД'))) = round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('абвгдеёжз'), 'гдеёЗД')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('абвгдеёжз'), materialize('ЁЁЁЁЁЁЁЁ'))) = round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('абвгдеёжз'), 'ЁЁЁЁЁЁЁЁ')) from system.numbers limit 5;
|
||||
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8('', materialize(''))) = round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize(''), '')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8('абв',materialize(''))) = round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('абв'), '')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8('', materialize('абв'))) = round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize(''), 'абв')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8('абвГДЕёжз', materialize('АбвгдЕёжз'))) = round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('абвГДЕёжз'), 'АбвгдЕёжз')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8('аБВГдеёЖз', materialize('АбвГдеёж'))) = round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('аБВГдеёЖз'), 'АбвГдеёж')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8('абвгдеёжз', materialize('гдеёЗД'))) = round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('абвгдеёжз'), 'гдеёЗД')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8('абвгдеёжз', materialize('ЁЁЁЁЁЁЁЁ'))) = round(1000 * ngramDistanceCaseInsensitiveUTF8(materialize('абвгдеёжз'), 'ЁЁЁЁЁЁЁЁ')) from system.numbers limit 5;
|
||||
|
||||
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8('', ''));
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8('абв', ''));
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8('', 'абв'));
|
||||
@ -43,6 +80,10 @@ select round(1000 * ngramDistanceCaseInsensitiveUTF8('аБВГдеёЖз', 'Аб
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8('абвгдеёжз', 'гдеёЗД'));
|
||||
select round(1000 * ngramDistanceCaseInsensitiveUTF8('АБВГДеёжз', 'ЁЁЁЁЁЁЁЁ'));
|
||||
|
||||
SELECT Title, round(1000 * distance) FROM test_distance ORDER BY ngramDistanceCaseInsensitiveUTF8(Title, Title) as distance;
|
||||
SELECT Title, round(1000 * distance) FROM test_distance ORDER BY ngramDistanceCaseInsensitiveUTF8(Title, extract(Title, 'как дела')) as distance;
|
||||
SELECT Title, round(1000 * distance) FROM test_distance ORDER BY ngramDistanceCaseInsensitiveUTF8(Title, extract(Title, 'metr')) as distance;
|
||||
|
||||
SELECT Title, round(1000 * distance) FROM test_distance ORDER BY ngramDistanceCaseInsensitiveUTF8(Title, 'ПрИвЕт кАК ДЕЛа') as distance;
|
||||
SELECT Title, round(1000 * distance) FROM test_distance ORDER BY ngramDistanceCaseInsensitiveUTF8(Title, 'как ПРИВЕТ дела') as distance;
|
||||
SELECT Title, round(1000 * distance) FROM test_distance ORDER BY ngramDistanceCaseInsensitiveUTF8(Title, 'metrika') as distance;
|
||||
@ -62,6 +103,23 @@ select round(1000 * ngramDistance(materialize('abcdefgh'), 'abcdefg')) from syst
|
||||
select round(1000 * ngramDistance(materialize('abcdefgh'), 'defgh')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistance(materialize('abcdefgh'), 'aaaaaaaa')) from system.numbers limit 5;
|
||||
|
||||
select round(1000 * ngramDistance(materialize(''),materialize('')))=round(1000 * ngramDistance(materialize(''), '')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistance(materialize('abc'),materialize('')))=round(1000 * ngramDistance(materialize('abc'), '')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistance(materialize(''), materialize('abc')))=round(1000 * ngramDistance(materialize(''), 'abc')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistance(materialize('abcdefgh'), materialize('abcdefgh')))=round(1000 * ngramDistance(materialize('abcdefgh'), 'abcdefgh')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistance(materialize('abcdefgh'), materialize('abcdefg')))=round(1000 * ngramDistance(materialize('abcdefgh'), 'abcdefg')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistance(materialize('abcdefgh'), materialize('defgh')))=round(1000 * ngramDistance(materialize('abcdefgh'), 'defgh')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistance(materialize('abcdefgh'), materialize('aaaaaaaa')))=round(1000 * ngramDistance(materialize('abcdefgh'), 'aaaaaaaa')) from system.numbers limit 5;
|
||||
|
||||
select round(1000 * ngramDistance('',materialize('')))=round(1000 * ngramDistance(materialize(''), '')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistance('abc', materialize('')))=round(1000 * ngramDistance(materialize('abc'), '')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistance('', materialize('abc')))=round(1000 * ngramDistance(materialize(''), 'abc')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistance('abcdefgh', materialize('abcdefgh')))=round(1000 * ngramDistance(materialize('abcdefgh'), 'abcdefgh')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistance('abcdefgh', materialize('abcdefg')))=round(1000 * ngramDistance(materialize('abcdefgh'), 'abcdefg')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistance('abcdefgh', materialize('defgh')))=round(1000 * ngramDistance(materialize('abcdefgh'), 'defgh')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistance('abcdefgh', materialize('aaaaaaaa')))=round(1000 * ngramDistance(materialize('abcdefgh'), 'aaaaaaaa')) from system.numbers limit 5;
|
||||
|
||||
|
||||
select round(1000 * ngramDistance('', ''));
|
||||
select round(1000 * ngramDistance('abc', ''));
|
||||
select round(1000 * ngramDistance('', 'abc'));
|
||||
@ -86,6 +144,22 @@ select round(1000 * ngramDistanceCaseInsensitive(materialize('abcdefgh'), 'abcde
|
||||
select round(1000 * ngramDistanceCaseInsensitive(materialize('AAAAbcdefgh'), 'defgh')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitive(materialize('ABCdefgH'), 'aaaaaaaa')) from system.numbers limit 5;
|
||||
|
||||
select round(1000 * ngramDistanceCaseInsensitive(materialize(''), materialize('')))=round(1000 * ngramDistanceCaseInsensitive(materialize(''), '')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitive(materialize('abc'), materialize('')))=round(1000 * ngramDistanceCaseInsensitive(materialize('abc'), '')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitive(materialize(''), materialize('abc')))=round(1000 * ngramDistanceCaseInsensitive(materialize(''), 'abc')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitive(materialize('abCdefgH'), materialize('Abcdefgh')))=round(1000 * ngramDistanceCaseInsensitive(materialize('abCdefgH'), 'Abcdefgh')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitive(materialize('abcdefgh'), materialize('abcdeFG')))=round(1000 * ngramDistanceCaseInsensitive(materialize('abcdefgh'), 'abcdeFG')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitive(materialize('AAAAbcdefgh'), materialize('defgh')))=round(1000 * ngramDistanceCaseInsensitive(materialize('AAAAbcdefgh'), 'defgh')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitive(materialize('ABCdefgH'), materialize('aaaaaaaa')))=round(1000 * ngramDistanceCaseInsensitive(materialize('ABCdefgH'), 'aaaaaaaa')) from system.numbers limit 5;
|
||||
|
||||
select round(1000 * ngramDistanceCaseInsensitive('', materialize('')))=round(1000 * ngramDistanceCaseInsensitive(materialize(''), '')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitive('abc', materialize('')))=round(1000 * ngramDistanceCaseInsensitive(materialize('abc'), '')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitive('', materialize('abc')))=round(1000 * ngramDistanceCaseInsensitive(materialize(''), 'abc')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitive('abCdefgH', materialize('Abcdefgh')))=round(1000 * ngramDistanceCaseInsensitive(materialize('abCdefgH'), 'Abcdefgh')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitive('abcdefgh', materialize('abcdeFG')))=round(1000 * ngramDistanceCaseInsensitive(materialize('abcdefgh'), 'abcdeFG')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitive('AAAAbcdefgh', materialize('defgh')))=round(1000 * ngramDistanceCaseInsensitive(materialize('AAAAbcdefgh'), 'defgh')) from system.numbers limit 5;
|
||||
select round(1000 * ngramDistanceCaseInsensitive('ABCdefgH', materialize('aaaaaaaa')))=round(1000 * ngramDistanceCaseInsensitive(materialize('ABCdefgH'), 'aaaaaaaa')) from system.numbers limit 5;
|
||||
|
||||
select round(1000 * ngramDistanceCaseInsensitive('', ''));
|
||||
select round(1000 * ngramDistanceCaseInsensitive('abc', ''));
|
||||
select round(1000 * ngramDistanceCaseInsensitive('', 'abc'));
|
||||
|
||||
Loading…
Reference in New Issue
Block a user