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dbms: fix quantileDeterministic (no hash was saved with samples) [#METR-13932]

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This commit is contained in:
Andrey Mironov 2015-09-10 18:07:29 +03:00
parent 540c411aa8
commit 61988e6a37
1 changed files with 7 additions and 5 deletions
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12
dbms/include/DB/AggregateFunctions/ReservoirSamplerDeterministic.h
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@ -67,6 +67,7 @@ public:
void insertImpl(const T & v, const UInt32 hash)
{
/// @todo why + 1? I don't quite recall
while (samples.size() + 1 >= sample_count)
{
if (++skip_degree > detail::MAX_SKIP_DEGREE)
@ -119,6 +120,7 @@ public:
/** Если T не числовой тип, использование этого метода вызывает ошибку компиляции,
* но использование класса ошибки не вызывает. SFINAE.
* Не SFINAE. Функции члены шаблонов типов просто не проверяются, пока не используются.
*/
double quantileInterpolated(double level)
{
@ -153,9 +155,9 @@ public:
thinOut();
}
for (size_t i = 0; i < b.samples.size(); ++i)
if (good(b.samples[i].second))
insertImpl(b.samples[i].first, b.samples[i].second);
for (const auto & sample : b.samples)
if (good(sample.second))
insertImpl(sample.first, sample.second);
total_values += b.total_values;
}
@ -167,7 +169,7 @@ public:
samples.resize(std::min(total_values, sample_count));
for (size_t i = 0; i < samples.size(); ++i)
DB::readBinary(samples[i].first, buf);
DB::readPODBinary(samples[i], buf);
sorted = false;
}
@ -178,7 +180,7 @@ public:
DB::writeIntBinary<size_t>(total_values, buf);
for (size_t i = 0; i < std::min(sample_count, total_values); ++i)
DB::writeBinary(samples[i].first, buf);
DB::writePODBinary(samples[i], buf);
}
private: