mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-30 13:40:50 +00:00
629 lines
18 KiB
C++
629 lines
18 KiB
C++
#include <iomanip>
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#include <DB/Core/Field.h>
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#include <DB/Columns/ColumnString.h>
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#include <DB/Columns/ColumnFixedString.h>
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#include <DB/Columns/ColumnsNumber.h>
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#include <DB/DataStreams/IProfilingBlockInputStream.h>
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#include <DB/DataStreams/OneBlockInputStream.h>
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#include <DB/Parsers/ASTExpressionList.h>
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#include <DB/Parsers/ASTFunction.h>
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#include <DB/Parsers/ASTLiteral.h>
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#include <DB/Interpreters/Set.h>
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#include <DB/DataTypes/DataTypeArray.h>
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#include <DB/DataTypes/DataTypesNumberFixed.h>
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#include <DB/DataTypes/DataTypeString.h>
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#include <DB/DataTypes/DataTypeFixedString.h>
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namespace DB
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{
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size_t Set::getTotalRowCount() const
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{
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size_t rows = 0;
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rows += key64.size();
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rows += key_string.size();
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rows += hashed.size();
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return rows;
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}
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size_t Set::getTotalByteCount() const
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{
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size_t bytes = 0;
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bytes += key64.getBufferSizeInBytes();
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bytes += key_string.getBufferSizeInBytes();
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bytes += hashed.getBufferSizeInBytes();
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bytes += string_pool.size();
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return bytes;
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}
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bool Set::checkSetSizeLimits() const
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{
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if (max_rows && getTotalRowCount() > max_rows)
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return false;
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if (max_bytes && getTotalByteCount() > max_bytes)
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return false;
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return true;
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}
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Set::Type Set::chooseMethod(const DataTypes & key_types, bool & keys_fit_128_bits, Sizes & key_sizes)
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{
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size_t keys_size = key_types.size();
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keys_fit_128_bits = true;
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size_t keys_bytes = 0;
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key_sizes.resize(keys_size);
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for (size_t j = 0; j < keys_size; ++j)
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{
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if (!key_types[j]->isNumeric())
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{
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keys_fit_128_bits = false;
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break;
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}
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key_sizes[j] = key_types[j]->getSizeOfField();
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keys_bytes += key_sizes[j];
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}
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if (keys_bytes > 16)
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keys_fit_128_bits = false;
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/// Если есть один ключ, который помещается в 64 бита
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if (keys_size == 1 && key_types[0]->isNumeric())
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return KEY_64;
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/// Если есть один строковый ключ, то используем хэш-таблицу с ним
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if (keys_size == 1
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&& (dynamic_cast<const DataTypeString *>(&*key_types[0]) || dynamic_cast<const DataTypeFixedString *>(&*key_types[0])))
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return KEY_STRING;
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/// Если много ключей - будем строить множество хэшей от них
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return HASHED;
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}
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void Set::create(BlockInputStreamPtr stream)
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{
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LOG_TRACE(log, "Creating set");
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Stopwatch watch;
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size_t entries = 0;
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/// Читаем все данные
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while (Block block = stream->read())
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{
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size_t keys_size = block.columns();
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Row key(keys_size);
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ConstColumnPlainPtrs key_columns(keys_size);
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data_types.resize(keys_size);
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/// Запоминаем столбцы, с которыми будем работать
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for (size_t i = 0; i < keys_size; ++i)
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{
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key_columns[i] = block.getByPosition(i).column;
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data_types[i] = block.getByPosition(i).type;
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}
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size_t rows = block.rows();
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/// Какую структуру данных для множества использовать?
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keys_fit_128_bits = false;
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type = chooseMethod(data_types, keys_fit_128_bits, key_sizes);
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if (type == KEY_64)
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{
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SetUInt64 & res = key64;
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const IColumn & column = *key_columns[0];
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/// Для всех строчек
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for (size_t i = 0; i < rows; ++i)
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{
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/// Строим ключ
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UInt64 key = get<UInt64>(column[i]);
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res.insert(key);
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}
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entries = res.size();
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}
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else if (type == KEY_STRING)
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{
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SetString & res = key_string;
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const IColumn & column = *key_columns[0];
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if (const ColumnString * column_string = dynamic_cast<const ColumnString *>(&column))
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{
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const ColumnString::Offsets_t & offsets = column_string->getOffsets();
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const ColumnString::Chars_t & data = column_string->getChars();
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/// Для всех строчек
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for (size_t i = 0; i < rows; ++i)
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{
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/// Строим ключ
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StringRef ref(&data[i == 0 ? 0 : offsets[i - 1]], (i == 0 ? offsets[i] : (offsets[i] - offsets[i - 1])) - 1);
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SetString::iterator it;
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bool inserted;
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res.emplace(ref, it, inserted);
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if (inserted)
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it->data = string_pool.insert(ref.data, ref.size);
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}
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}
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else if (const ColumnFixedString * column_string = dynamic_cast<const ColumnFixedString *>(&column))
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{
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size_t n = column_string->getN();
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const ColumnFixedString::Chars_t & data = column_string->getChars();
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/// Для всех строчек
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for (size_t i = 0; i < rows; ++i)
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{
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/// Строим ключ
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StringRef ref(&data[i * n], n);
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SetString::iterator it;
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bool inserted;
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res.emplace(ref, it, inserted);
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if (inserted)
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it->data = string_pool.insert(ref.data, ref.size);
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}
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}
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else
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throw Exception("Illegal type of column when creating set with string key: " + column.getName(), ErrorCodes::ILLEGAL_COLUMN);
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entries = res.size();
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}
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else if (type == HASHED)
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{
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SetHashed & res = hashed;
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/// Для всех строчек
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for (size_t i = 0; i < rows; ++i)
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res.insert(pack128(i, keys_fit_128_bits, keys_size, key, key_columns, key_sizes));
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entries = res.size();
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}
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else if (type == GENERIC)
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{
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/// Общий способ
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SetGeneric & res = generic;
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/// Для всех строчек
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for (size_t i = 0; i < rows; ++i)
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{
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/// Строим ключ
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for (size_t j = 0; j < keys_size; ++j)
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key_columns[j]->get(i, key[j]);
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res.insert(key);
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key.resize(keys_size);
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}
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entries = res.size();
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}
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else
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throw Exception("Unknown set variant.", ErrorCodes::UNKNOWN_SET_DATA_VARIANT);
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if (!checkSetSizeLimits())
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{
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if (overflow_mode == Limits::THROW)
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throw Exception("IN-Set size exceeded."
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" Rows: " + Poco::NumberFormatter::format(getTotalRowCount()) +
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", limit: " + Poco::NumberFormatter::format(max_rows) +
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". Bytes: " + Poco::NumberFormatter::format(getTotalByteCount()) +
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", limit: " + Poco::NumberFormatter::format(max_bytes) + ".",
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ErrorCodes::SET_SIZE_LIMIT_EXCEEDED);
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if (overflow_mode == Limits::BREAK)
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{
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if (IProfilingBlockInputStream * profiling_in = dynamic_cast<IProfilingBlockInputStream *>(&*stream))
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profiling_in->cancel();
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break;
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}
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throw Exception("Logical error: unknown overflow mode", ErrorCodes::LOGICAL_ERROR);
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}
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}
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logProfileInfo(watch, *stream, entries);
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}
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void Set::logProfileInfo(Stopwatch & watch, IBlockInputStream & in, size_t entries)
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{
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/// Выведем информацию о том, сколько считано строк и байт.
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size_t rows = 0;
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size_t bytes = 0;
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in.getLeafRowsBytes(rows, bytes);
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size_t head_rows = 0;
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if (IProfilingBlockInputStream * profiling_in = dynamic_cast<IProfilingBlockInputStream *>(&in))
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head_rows = profiling_in->getInfo().rows;
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if (rows != 0)
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{
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LOG_DEBUG(log, std::fixed << std::setprecision(3)
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<< "Created set with " << entries << " entries from " << head_rows << " rows."
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<< " Read " << rows << " rows, " << bytes / 1048576.0 << " MiB in " << watch.elapsedSeconds() << " sec., "
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<< static_cast<size_t>(rows / watch.elapsedSeconds()) << " rows/sec., " << bytes / 1048576.0 / watch.elapsedSeconds() << " MiB/sec.");
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}
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}
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void Set::create(DataTypes & types, ASTPtr node)
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{
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data_types = types;
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/// Засунем множество в блок.
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Block block;
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for (size_t i = 0, size = data_types.size(); i < size; ++i)
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{
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ColumnWithNameAndType col;
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col.type = data_types[i];
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col.column = data_types[i]->createColumn();
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col.name = "_" + Poco::NumberFormatter::format(i);
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block.insert(col);
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}
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ASTExpressionList & list = dynamic_cast<ASTExpressionList &>(*node);
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for (ASTs::iterator it = list.children.begin(); it != list.children.end(); ++it)
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{
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if (data_types.size() == 1)
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{
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if (ASTLiteral * lit = dynamic_cast<ASTLiteral *>(&**it))
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block.getByPosition(0).column->insert(lit->value);
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else
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throw Exception("Incorrect element of set. Must be literal.", ErrorCodes::INCORRECT_ELEMENT_OF_SET);
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}
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else if (ASTFunction * func = dynamic_cast<ASTFunction *>(&**it))
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{
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if (func->name != "tuple")
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throw Exception("Incorrect element of set. Must be tuple.", ErrorCodes::INCORRECT_ELEMENT_OF_SET);
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size_t tuple_size = func->arguments->children.size();
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if (tuple_size != data_types.size())
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throw Exception("Incorrect size of tuple in set.", ErrorCodes::INCORRECT_ELEMENT_OF_SET);
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for (size_t j = 0; j < tuple_size; ++j)
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{
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if (ASTLiteral * lit = dynamic_cast<ASTLiteral *>(&*func->arguments->children[j]))
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block.getByPosition(j).column->insert(lit->value);
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else
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throw Exception("Incorrect element of tuple in set. Must be literal.", ErrorCodes::INCORRECT_ELEMENT_OF_SET);
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}
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}
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else
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throw Exception("Incorrect element of set", ErrorCodes::INCORRECT_ELEMENT_OF_SET);
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/// NOTE: Потом можно реализовать возможность задавать константные выражения в множествах.
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}
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create(new OneBlockInputStream(block));
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}
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void Set::execute(Block & block, const ColumnNumbers & arguments, size_t result, bool negative) const
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{
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ColumnUInt8 * c_res = new ColumnUInt8;
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block.getByPosition(result).column = c_res;
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ColumnUInt8::Container_t & vec_res = c_res->getData();
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vec_res.resize(block.getByPosition(arguments[0]).column->size());
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/// Если множество пусто
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if (data_types.empty())
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{
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if (negative)
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memset(&vec_res[0], 1, vec_res.size());
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return;
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}
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DataTypeArray * array_type = dynamic_cast<DataTypeArray *>(&*block.getByPosition(arguments[0]).type);
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if (array_type)
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{
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if (data_types.size() != 1 || arguments.size() != 1)
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throw Exception("Number of columns in section IN doesn't match.", ErrorCodes::NUMBER_OF_COLUMNS_DOESNT_MATCH);
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if (array_type->getNestedType()->getName() != data_types[0]->getName())
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throw Exception(std::string() + "Types in section IN don't match: " + data_types[0]->getName() + " on the right, " + array_type->getNestedType()->getName() + " on the left.", ErrorCodes::TYPE_MISMATCH);
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IColumn * in_column = &*block.getByPosition(arguments[0]).column;
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if (ColumnConstArray * col = dynamic_cast<ColumnConstArray *>(in_column))
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executeConstArray(col, vec_res, negative);
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else if (ColumnArray * col = dynamic_cast<ColumnArray *>(in_column))
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executeArray(col, vec_res, negative);
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else
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throw Exception("Unexpeced array column type: " + in_column->getName(), ErrorCodes::ILLEGAL_COLUMN);
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}
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else
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{
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if (data_types.size() != arguments.size())
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throw Exception("Number of columns in section IN doesn't match.", ErrorCodes::NUMBER_OF_COLUMNS_DOESNT_MATCH);
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/// Запоминаем столбцы, с которыми будем работать. Также проверим, что типы данных правильные.
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ConstColumnPlainPtrs key_columns(arguments.size());
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for (size_t i = 0; i < arguments.size(); ++i)
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{
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key_columns[i] = block.getByPosition(arguments[i]).column;
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if (data_types[i]->getName() != block.getByPosition(arguments[i]).type->getName())
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throw Exception("Types of column " + Poco::NumberFormatter::format(i + 1) + " in section IN don't match: " + data_types[i]->getName() + " on the right, " + block.getByPosition(arguments[i]).type->getName() + " on the left.", ErrorCodes::TYPE_MISMATCH);
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}
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executeOrdinary(key_columns, vec_res, negative);
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}
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}
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void Set::executeOrdinary(const ConstColumnPlainPtrs & key_columns, ColumnUInt8::Container_t & vec_res, bool negative) const
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{
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size_t keys_size = data_types.size();
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size_t rows = key_columns[0]->size();
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Row key(keys_size);
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if (type == KEY_64)
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{
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const SetUInt64 & set = key64;
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const IColumn & column = *key_columns[0];
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/// Для всех строчек
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for (size_t i = 0; i < rows; ++i)
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{
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/// Строим ключ
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UInt64 key = get<UInt64>(column[i]);
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vec_res[i] = negative ^ (set.end() != set.find(key));
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}
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}
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else if (type == KEY_STRING)
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{
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const SetString & set = key_string;
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const IColumn & column = *key_columns[0];
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if (const ColumnString * column_string = dynamic_cast<const ColumnString *>(&column))
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{
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const ColumnString::Offsets_t & offsets = column_string->getOffsets();
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const ColumnString::Chars_t & data = column_string->getChars();
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/// Для всех строчек
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for (size_t i = 0; i < rows; ++i)
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{
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/// Строим ключ
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StringRef ref(&data[i == 0 ? 0 : offsets[i - 1]], (i == 0 ? offsets[i] : (offsets[i] - offsets[i - 1])) - 1);
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vec_res[i] = negative ^ (set.end() != set.find(ref));
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}
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}
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else if (const ColumnFixedString * column_string = dynamic_cast<const ColumnFixedString *>(&column))
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{
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size_t n = column_string->getN();
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const ColumnFixedString::Chars_t & data = column_string->getChars();
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/// Для всех строчек
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for (size_t i = 0; i < rows; ++i)
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{
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/// Строим ключ
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StringRef ref(&data[i * n], n);
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vec_res[i] = negative ^ (set.end() != set.find(ref));
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}
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}
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else if (const ColumnConstString * column_string = dynamic_cast<const ColumnConstString *>(&column))
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{
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bool res = negative ^ (set.end() != set.find(StringRef(column_string->getData())));
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/// Для всех строчек
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for (size_t i = 0; i < rows; ++i)
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vec_res[i] = res;
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}
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else
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throw Exception("Illegal type of column when creating set with string key: " + column.getName(), ErrorCodes::ILLEGAL_COLUMN);
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}
|
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else if (type == HASHED)
|
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{
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const SetHashed & set = hashed;
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/// Для всех строчек
|
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for (size_t i = 0; i < rows; ++i)
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vec_res[i] = negative ^ (set.end() != set.find(pack128(i, keys_fit_128_bits, keys_size, key_columns, key_sizes)));
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}
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else if (type == GENERIC)
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{
|
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/// Общий способ
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const SetGeneric & set = generic;
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/// Для всех строчек
|
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for (size_t i = 0; i < rows; ++i)
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{
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/// Строим ключ
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for (size_t j = 0; j < keys_size; ++j)
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key_columns[j]->get(i, key[j]);
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vec_res[i] = negative ^ (set.end() != set.find(key));
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}
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}
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else
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throw Exception("Unknown set variant.", ErrorCodes::UNKNOWN_SET_DATA_VARIANT);
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}
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void Set::executeArray(const ColumnArray * key_column, ColumnUInt8::Container_t & vec_res, bool negative) const
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{
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size_t rows = key_column->size();
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const ColumnArray::Offsets_t & offsets = key_column->getOffsets();
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const IColumn & nested_column = key_column->getData();
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if (type == KEY_64)
|
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{
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const SetUInt64 & set = key64;
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size_t prev_offset = 0;
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/// Для всех строчек
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for (size_t i = 0; i < rows; ++i)
|
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{
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UInt8 res = 0;
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/// Для всех элементов
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for (size_t j = prev_offset; j < offsets[i]; ++j)
|
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{
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/// Строим ключ
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UInt64 key = get<UInt64>(nested_column[j]);
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res |= negative ^ (set.end() != set.find(key));
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if (res)
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break;
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}
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vec_res[i] = res;
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prev_offset = offsets[i];
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}
|
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}
|
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else if (type == KEY_STRING)
|
||
{
|
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const SetString & set = key_string;
|
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|
||
if (const ColumnString * column_string = dynamic_cast<const ColumnString *>(&nested_column))
|
||
{
|
||
const ColumnString::Offsets_t & nested_offsets = column_string->getOffsets();
|
||
const ColumnString::Chars_t & data = column_string->getChars();
|
||
|
||
size_t prev_offset = 0;
|
||
/// Для всех строчек
|
||
for (size_t i = 0; i < rows; ++i)
|
||
{
|
||
UInt8 res = 0;
|
||
/// Для всех элементов
|
||
for (size_t j = prev_offset; j < offsets[i]; ++j)
|
||
{
|
||
/// Строим ключ
|
||
size_t begin = j == 0 ? 0 : nested_offsets[j - 1];
|
||
size_t end = nested_offsets[j];
|
||
StringRef ref(&data[begin], end - begin - 1);
|
||
res |= negative ^ (set.end() != set.find(ref));
|
||
if (res)
|
||
break;
|
||
}
|
||
vec_res[i] = res;
|
||
prev_offset = offsets[i];
|
||
}
|
||
}
|
||
else if (const ColumnFixedString * column_string = dynamic_cast<const ColumnFixedString *>(&nested_column))
|
||
{
|
||
size_t n = column_string->getN();
|
||
const ColumnFixedString::Chars_t & data = column_string->getChars();
|
||
|
||
size_t prev_offset = 0;
|
||
/// Для всех строчек
|
||
for (size_t i = 0; i < rows; ++i)
|
||
{
|
||
UInt8 res = 0;
|
||
/// Для всех элементов
|
||
for (size_t j = prev_offset; j < offsets[i]; ++j)
|
||
{
|
||
/// Строим ключ
|
||
StringRef ref(&data[j * n], n);
|
||
res |= negative ^ (set.end() != set.find(ref));
|
||
if (res)
|
||
break;
|
||
}
|
||
vec_res[i] = res;
|
||
prev_offset = offsets[i];
|
||
}
|
||
}
|
||
else
|
||
throw Exception("Illegal type of column when looking for Array(String) key: " + nested_column.getName(), ErrorCodes::ILLEGAL_COLUMN);
|
||
}
|
||
else if (type == HASHED)
|
||
{
|
||
const SetHashed & set = hashed;
|
||
ConstColumnPlainPtrs nested_columns(1, &nested_column);
|
||
|
||
size_t prev_offset = 0;
|
||
/// Для всех строчек
|
||
for (size_t i = 0; i < rows; ++i)
|
||
{
|
||
UInt8 res = 0;
|
||
/// Для всех элементов
|
||
for (size_t j = prev_offset; j < offsets[i]; ++j)
|
||
{
|
||
/// Строим ключ
|
||
res |= negative ^ (set.end() != set.find(pack128(j, keys_fit_128_bits, 1, nested_columns, key_sizes)));
|
||
if (res)
|
||
break;
|
||
}
|
||
vec_res[i] = res;
|
||
prev_offset = offsets[i];
|
||
}
|
||
}
|
||
else if (type == GENERIC)
|
||
{
|
||
/// Общий способ
|
||
const SetGeneric & set = generic;
|
||
|
||
Row key(1);
|
||
size_t prev_offset = 0;
|
||
/// Для всех строчек
|
||
for (size_t i = 0; i < rows; ++i)
|
||
{
|
||
UInt8 res = 0;
|
||
/// Для всех элементов
|
||
for (size_t j = prev_offset; j < offsets[i]; ++j)
|
||
{
|
||
nested_column.get(j, key[0]);
|
||
res |= negative ^ (set.end() != set.find(key));
|
||
if (res)
|
||
break;
|
||
}
|
||
vec_res[i] = res;
|
||
prev_offset = offsets[i];
|
||
}
|
||
}
|
||
else
|
||
throw Exception("Unknown set variant.", ErrorCodes::UNKNOWN_SET_DATA_VARIANT);
|
||
}
|
||
|
||
void Set::executeConstArray(const ColumnConstArray * key_column, ColumnUInt8::Container_t & vec_res, bool negative) const
|
||
{
|
||
if (type == HASHED)
|
||
{
|
||
ColumnPtr full_column = key_column->convertToFullColumn();
|
||
executeArray(dynamic_cast<ColumnArray *>(&*full_column), vec_res, negative);
|
||
return;
|
||
}
|
||
|
||
size_t rows = key_column->size();
|
||
Array values = key_column->getData();
|
||
UInt8 res = 0;
|
||
|
||
/// Для всех элементов
|
||
for (size_t j = 0; j < values.size(); ++j)
|
||
{
|
||
if (type == KEY_64)
|
||
{
|
||
const SetUInt64 & set = key64;
|
||
UInt64 key = get<UInt64>(values[j]);
|
||
res |= negative ^ (set.end() != set.find(key));
|
||
}
|
||
else if (type == KEY_STRING)
|
||
{
|
||
const SetString & set = key_string;
|
||
res |= negative ^ (set.end() != set.find(StringRef(get<String>(values[j]))));
|
||
}
|
||
else if (type == GENERIC)
|
||
{
|
||
const SetGeneric & set = generic;
|
||
Row key(1, values[j]);
|
||
res |= negative ^ (set.end() != set.find(key));
|
||
}
|
||
else
|
||
throw Exception("Unknown set variant.", ErrorCodes::UNKNOWN_SET_DATA_VARIANT);
|
||
|
||
if (res)
|
||
break;
|
||
}
|
||
|
||
/// Для всех строчек
|
||
for (size_t i = 0; i < rows; ++i)
|
||
vec_res[i] = res;
|
||
}
|
||
|
||
}
|