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https://github.com/ClickHouse/ClickHouse.git
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609 lines
21 KiB
C++
609 lines
21 KiB
C++
#pragma once
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#include <Columns/IColumnUnique.h>
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#include <Columns/ReverseIndex.h>
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#include <Columns/ColumnVector.h>
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#include <Columns/ColumnNullable.h>
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#include <Columns/ColumnString.h>
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#include <Columns/ColumnFixedString.h>
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#include <DataTypes/DataTypeNullable.h>
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#include <DataTypes/NumberTraits.h>
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#include <Common/typeid_cast.h>
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#include <Common/assert_cast.h>
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#include <ext/range.h>
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#include <common/unaligned.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int LOGICAL_ERROR;
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extern const int ILLEGAL_COLUMN;
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}
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template <typename ColumnType>
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class ColumnUnique final : public COWHelper<IColumnUnique, ColumnUnique<ColumnType>>
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{
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friend class COWHelper<IColumnUnique, ColumnUnique<ColumnType>>;
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private:
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explicit ColumnUnique(MutableColumnPtr && holder, bool is_nullable);
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explicit ColumnUnique(const IDataType & type);
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ColumnUnique(const ColumnUnique & other);
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public:
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MutableColumnPtr cloneEmpty() const override;
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const ColumnPtr & getNestedColumn() const override;
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const ColumnPtr & getNestedNotNullableColumn() const override { return column_holder; }
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bool nestedColumnIsNullable() const override { return is_nullable; }
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size_t uniqueInsert(const Field & x) override;
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size_t uniqueInsertFrom(const IColumn & src, size_t n) override;
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MutableColumnPtr uniqueInsertRangeFrom(const IColumn & src, size_t start, size_t length) override;
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IColumnUnique::IndexesWithOverflow uniqueInsertRangeWithOverflow(const IColumn & src, size_t start, size_t length,
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size_t max_dictionary_size) override;
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size_t uniqueInsertData(const char * pos, size_t length) override;
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size_t uniqueDeserializeAndInsertFromArena(const char * pos, const char *& new_pos) override;
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size_t getDefaultValueIndex() const override { return 0; }
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size_t getNullValueIndex() const override;
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size_t getNestedTypeDefaultValueIndex() const override { return is_nullable ? 1 : 0; }
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bool canContainNulls() const override { return is_nullable; }
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Field operator[](size_t n) const override { return (*getNestedColumn())[n]; }
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void get(size_t n, Field & res) const override { getNestedColumn()->get(n, res); }
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StringRef getDataAt(size_t n) const override { return getNestedColumn()->getDataAt(n); }
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StringRef getDataAtWithTerminatingZero(size_t n) const override
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{
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return getNestedColumn()->getDataAtWithTerminatingZero(n);
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}
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UInt64 get64(size_t n) const override { return getNestedColumn()->get64(n); }
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UInt64 getUInt(size_t n) const override { return getNestedColumn()->getUInt(n); }
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Int64 getInt(size_t n) const override { return getNestedColumn()->getInt(n); }
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Float64 getFloat64(size_t n) const override { return getNestedColumn()->getFloat64(n); }
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Float32 getFloat32(size_t n) const override { return getNestedColumn()->getFloat32(n); }
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bool getBool(size_t n) const override { return getNestedColumn()->getBool(n); }
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bool isNullAt(size_t n) const override { return is_nullable && n == getNullValueIndex(); }
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StringRef serializeValueIntoArena(size_t n, Arena & arena, char const *& begin) const override;
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void updateHashWithValue(size_t n, SipHash & hash_func) const override
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{
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return getNestedColumn()->updateHashWithValue(n, hash_func);
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}
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int compareAt(size_t n, size_t m, const IColumn & rhs, int nan_direction_hint) const override;
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void getExtremes(Field & min, Field & max) const override { column_holder->getExtremes(min, max); }
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bool valuesHaveFixedSize() const override { return column_holder->valuesHaveFixedSize(); }
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bool isFixedAndContiguous() const override { return column_holder->isFixedAndContiguous(); }
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size_t sizeOfValueIfFixed() const override { return column_holder->sizeOfValueIfFixed(); }
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bool isNumeric() const override { return column_holder->isNumeric(); }
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size_t byteSize() const override { return column_holder->byteSize(); }
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void protect() override { column_holder->protect(); }
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size_t allocatedBytes() const override
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{
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return column_holder->allocatedBytes()
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+ index.allocatedBytes()
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+ (nested_null_mask ? nested_null_mask->allocatedBytes() : 0);
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}
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void forEachSubcolumn(IColumn::ColumnCallback callback) override
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{
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callback(column_holder);
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index.setColumn(getRawColumnPtr());
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if (is_nullable)
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nested_column_nullable = ColumnNullable::create(column_holder, nested_null_mask);
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}
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bool structureEquals(const IColumn & rhs) const override
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{
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if (auto rhs_concrete = typeid_cast<const ColumnUnique *>(&rhs))
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return column_holder->structureEquals(*rhs_concrete->column_holder);
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return false;
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}
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const UInt64 * tryGetSavedHash() const override { return index.tryGetSavedHash(); }
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UInt128 getHash() const override { return hash.getHash(*getRawColumnPtr()); }
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private:
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IColumn::WrappedPtr column_holder;
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bool is_nullable;
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size_t size_of_value_if_fixed = 0;
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ReverseIndex<UInt64, ColumnType> index;
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/// For DataTypeNullable, stores null map.
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IColumn::WrappedPtr nested_null_mask;
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IColumn::WrappedPtr nested_column_nullable;
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class IncrementalHash
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{
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private:
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UInt128 hash;
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std::atomic<size_t> num_added_rows;
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std::mutex mutex;
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public:
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IncrementalHash() : num_added_rows(0) {}
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UInt128 getHash(const ColumnType & column);
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};
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mutable IncrementalHash hash;
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void createNullMask();
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void updateNullMask();
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static size_t numSpecialValues(bool is_nullable) { return is_nullable ? 2 : 1; }
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size_t numSpecialValues() const { return numSpecialValues(is_nullable); }
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ColumnType * getRawColumnPtr() { return assert_cast<ColumnType *>(column_holder.get()); }
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const ColumnType * getRawColumnPtr() const { return assert_cast<const ColumnType *>(column_holder.get()); }
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template <typename IndexType>
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MutableColumnPtr uniqueInsertRangeImpl(
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const IColumn & src,
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size_t start,
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size_t length,
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size_t num_added_rows,
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typename ColumnVector<IndexType>::MutablePtr && positions_column,
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ReverseIndex<UInt64, ColumnType> * secondary_index,
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size_t max_dictionary_size);
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};
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template <typename ColumnType>
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MutableColumnPtr ColumnUnique<ColumnType>::cloneEmpty() const
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{
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return ColumnUnique<ColumnType>::create(column_holder->cloneResized(numSpecialValues()), is_nullable);
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}
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template <typename ColumnType>
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ColumnUnique<ColumnType>::ColumnUnique(const ColumnUnique & other)
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: column_holder(other.column_holder)
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, is_nullable(other.is_nullable)
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, size_of_value_if_fixed (other.size_of_value_if_fixed)
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, index(numSpecialValues(is_nullable), 0)
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{
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index.setColumn(getRawColumnPtr());
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createNullMask();
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}
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template <typename ColumnType>
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ColumnUnique<ColumnType>::ColumnUnique(const IDataType & type)
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: is_nullable(type.isNullable())
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, index(numSpecialValues(is_nullable), 0)
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{
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const auto & holder_type = is_nullable ? *static_cast<const DataTypeNullable &>(type).getNestedType() : type;
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column_holder = holder_type.createColumn()->cloneResized(numSpecialValues());
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index.setColumn(getRawColumnPtr());
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createNullMask();
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if (column_holder->valuesHaveFixedSize())
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size_of_value_if_fixed = column_holder->sizeOfValueIfFixed();
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}
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template <typename ColumnType>
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ColumnUnique<ColumnType>::ColumnUnique(MutableColumnPtr && holder, bool is_nullable_)
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: column_holder(std::move(holder))
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, is_nullable(is_nullable_)
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, index(numSpecialValues(is_nullable_), 0)
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{
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if (column_holder->size() < numSpecialValues())
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throw Exception("Too small holder column for ColumnUnique.", ErrorCodes::ILLEGAL_COLUMN);
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if (isColumnNullable(*column_holder))
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throw Exception("Holder column for ColumnUnique can't be nullable.", ErrorCodes::ILLEGAL_COLUMN);
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index.setColumn(getRawColumnPtr());
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createNullMask();
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if (column_holder->valuesHaveFixedSize())
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size_of_value_if_fixed = column_holder->sizeOfValueIfFixed();
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}
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template <typename ColumnType>
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void ColumnUnique<ColumnType>::createNullMask()
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{
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if (is_nullable)
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{
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size_t size = getRawColumnPtr()->size();
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if (!nested_null_mask)
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{
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ColumnUInt8::MutablePtr null_mask = ColumnUInt8::create(size, UInt8(0));
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null_mask->getData()[getNullValueIndex()] = 1;
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nested_null_mask = std::move(null_mask);
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nested_column_nullable = ColumnNullable::create(column_holder, nested_null_mask);
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}
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else
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throw Exception("Null mask for ColumnUnique is already created.", ErrorCodes::LOGICAL_ERROR);
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}
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}
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template <typename ColumnType>
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void ColumnUnique<ColumnType>::updateNullMask()
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{
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if (is_nullable)
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{
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if (!nested_null_mask)
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throw Exception("Null mask for ColumnUnique is was not created.", ErrorCodes::LOGICAL_ERROR);
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size_t size = getRawColumnPtr()->size();
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if (nested_null_mask->size() != size)
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assert_cast<ColumnUInt8 &>(*nested_null_mask).getData().resize_fill(size);
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}
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}
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template <typename ColumnType>
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const ColumnPtr & ColumnUnique<ColumnType>::getNestedColumn() const
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{
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if (is_nullable)
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return nested_column_nullable;
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return column_holder;
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}
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template <typename ColumnType>
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size_t ColumnUnique<ColumnType>::getNullValueIndex() const
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{
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if (!is_nullable)
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throw Exception("ColumnUnique can't contain null values.", ErrorCodes::LOGICAL_ERROR);
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return 0;
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}
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template <typename ColumnType>
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size_t ColumnUnique<ColumnType>::uniqueInsert(const Field & x)
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{
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if (x.getType() == Field::Types::Null)
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return getNullValueIndex();
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if (size_of_value_if_fixed)
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return uniqueInsertData(&x.reinterpret<char>(), size_of_value_if_fixed);
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auto & val = x.get<String>();
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return uniqueInsertData(val.data(), val.size());
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}
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template <typename ColumnType>
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size_t ColumnUnique<ColumnType>::uniqueInsertFrom(const IColumn & src, size_t n)
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{
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if (is_nullable && src.isNullAt(n))
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return getNullValueIndex();
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if (auto * nullable = checkAndGetColumn<ColumnNullable>(src))
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return uniqueInsertFrom(nullable->getNestedColumn(), n);
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auto ref = src.getDataAt(n);
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return uniqueInsertData(ref.data, ref.size);
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}
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template <typename ColumnType>
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size_t ColumnUnique<ColumnType>::uniqueInsertData(const char * pos, size_t length)
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{
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auto column = getRawColumnPtr();
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if (column->getDataAt(getNestedTypeDefaultValueIndex()) == StringRef(pos, length))
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return getNestedTypeDefaultValueIndex();
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auto insertion_point = index.insert(StringRef(pos, length));
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updateNullMask();
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return insertion_point;
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}
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template <typename ColumnType>
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StringRef ColumnUnique<ColumnType>::serializeValueIntoArena(size_t n, Arena & arena, char const *& begin) const
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{
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if (is_nullable)
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{
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static constexpr auto s = sizeof(UInt8);
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auto pos = arena.allocContinue(s, begin);
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UInt8 flag = (n == getNullValueIndex() ? 1 : 0);
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unalignedStore<UInt8>(pos, flag);
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if (n == getNullValueIndex())
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return StringRef(pos, s);
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auto nested_ref = column_holder->serializeValueIntoArena(n, arena, begin);
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/// serializeValueIntoArena may reallocate memory. Have to use ptr from nested_ref.data and move it back.
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return StringRef(nested_ref.data - s, nested_ref.size + s);
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}
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return column_holder->serializeValueIntoArena(n, arena, begin);
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}
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template <typename ColumnType>
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size_t ColumnUnique<ColumnType>::uniqueDeserializeAndInsertFromArena(const char * pos, const char *& new_pos)
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{
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if (is_nullable)
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{
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UInt8 val = unalignedLoad<UInt8>(pos);
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pos += sizeof(val);
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if (val)
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{
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new_pos = pos;
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return getNullValueIndex();
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}
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}
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/// Numbers, FixedString
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if (size_of_value_if_fixed)
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{
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new_pos = pos + size_of_value_if_fixed;
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return uniqueInsertData(pos, size_of_value_if_fixed);
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}
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/// String
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const size_t string_size = unalignedLoad<size_t>(pos);
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pos += sizeof(string_size);
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new_pos = pos + string_size;
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/// -1 because of terminating zero
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return uniqueInsertData(pos, string_size - 1);
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}
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template <typename ColumnType>
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int ColumnUnique<ColumnType>::compareAt(size_t n, size_t m, const IColumn & rhs, int nan_direction_hint) const
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{
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if (is_nullable)
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{
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/// See ColumnNullable::compareAt
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bool lval_is_null = n == getNullValueIndex();
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bool rval_is_null = m == getNullValueIndex();
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if (unlikely(lval_is_null || rval_is_null))
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{
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if (lval_is_null && rval_is_null)
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return 0;
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else
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return lval_is_null ? nan_direction_hint : -nan_direction_hint;
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}
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}
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auto & column_unique = static_cast<const IColumnUnique &>(rhs);
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return getNestedColumn()->compareAt(n, m, *column_unique.getNestedColumn(), nan_direction_hint);
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}
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template <typename IndexType>
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static void checkIndexes(const ColumnVector<IndexType> & indexes, size_t max_dictionary_size)
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{
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auto & data = indexes.getData();
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for (size_t i = 0; i < data.size(); ++i)
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{
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if (data[i] >= max_dictionary_size)
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{
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throw Exception("Found index " + toString(data[i]) + " at position " + toString(i)
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+ " which is grated or equal than dictionary size " + toString(max_dictionary_size),
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ErrorCodes::LOGICAL_ERROR);
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}
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}
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}
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template <typename ColumnType>
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template <typename IndexType>
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MutableColumnPtr ColumnUnique<ColumnType>::uniqueInsertRangeImpl(
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const IColumn & src,
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size_t start,
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size_t length,
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size_t num_added_rows,
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typename ColumnVector<IndexType>::MutablePtr && positions_column,
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ReverseIndex<UInt64, ColumnType> * secondary_index,
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size_t max_dictionary_size)
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{
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const ColumnType * src_column;
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const NullMap * null_map = nullptr;
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auto & positions = positions_column->getData();
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auto update_position = [&](UInt64 & next_position) -> MutableColumnPtr
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{
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constexpr auto next_size = NumberTraits::nextSize(sizeof(IndexType));
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using SuperiorIndexType = typename NumberTraits::Construct<false, false, next_size>::Type;
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++next_position;
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if (next_position > std::numeric_limits<IndexType>::max())
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{
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if (sizeof(SuperiorIndexType) == sizeof(IndexType))
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throw Exception("Can't find superior index type for type " + demangle(typeid(IndexType).name()),
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ErrorCodes::LOGICAL_ERROR);
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auto expanded_column = ColumnVector<SuperiorIndexType>::create(length);
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auto & expanded_data = expanded_column->getData();
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for (size_t i = 0; i < num_added_rows; ++i)
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expanded_data[i] = positions[i];
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return uniqueInsertRangeImpl<SuperiorIndexType>(
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src,
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start,
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length,
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num_added_rows,
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std::move(expanded_column),
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secondary_index,
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max_dictionary_size);
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}
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return nullptr;
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};
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if (auto * nullable_column = checkAndGetColumn<ColumnNullable>(src))
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{
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src_column = typeid_cast<const ColumnType *>(&nullable_column->getNestedColumn());
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null_map = &nullable_column->getNullMapData();
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}
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else
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src_column = typeid_cast<const ColumnType *>(&src);
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if (src_column == nullptr)
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throw Exception("Invalid column type for ColumnUnique::insertRangeFrom. Expected " + column_holder->getName() +
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", got " + src.getName(), ErrorCodes::ILLEGAL_COLUMN);
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auto column = getRawColumnPtr();
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UInt64 next_position = column->size();
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if (secondary_index)
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next_position += secondary_index->size();
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auto insert_key = [&](const StringRef & ref, ReverseIndex<UInt64, ColumnType> & cur_index) -> MutableColumnPtr
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{
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auto inserted_pos = cur_index.insert(ref);
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positions[num_added_rows] = inserted_pos;
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if (inserted_pos == next_position)
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return update_position(next_position);
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return nullptr;
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};
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for (; num_added_rows < length; ++num_added_rows)
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{
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auto row = start + num_added_rows;
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if (null_map && (*null_map)[row])
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positions[num_added_rows] = getNullValueIndex();
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else if (column->compareAt(getNestedTypeDefaultValueIndex(), row, *src_column, 1) == 0)
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positions[num_added_rows] = getNestedTypeDefaultValueIndex();
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else
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{
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auto ref = src_column->getDataAt(row);
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MutableColumnPtr res = nullptr;
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if (secondary_index && next_position >= max_dictionary_size)
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{
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auto insertion_point = index.getInsertionPoint(ref);
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if (insertion_point == index.lastInsertionPoint())
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res = insert_key(ref, *secondary_index);
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else
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positions[num_added_rows] = insertion_point;
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}
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else
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res = insert_key(ref, index);
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if (res)
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return res;
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}
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}
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// checkIndexes(*positions_column, column->size() + (overflowed_keys ? overflowed_keys->size() : 0));
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return std::move(positions_column);
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}
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|
|
|
template <typename ColumnType>
|
|
MutableColumnPtr ColumnUnique<ColumnType>::uniqueInsertRangeFrom(const IColumn & src, size_t start, size_t length)
|
|
{
|
|
auto callForType = [this, &src, start, length](auto x) -> MutableColumnPtr
|
|
{
|
|
size_t size = getRawColumnPtr()->size();
|
|
|
|
using IndexType = decltype(x);
|
|
if (size <= std::numeric_limits<IndexType>::max())
|
|
{
|
|
auto positions = ColumnVector<IndexType>::create(length);
|
|
return this->uniqueInsertRangeImpl<IndexType>(src, start, length, 0, std::move(positions), nullptr, 0);
|
|
}
|
|
|
|
return nullptr;
|
|
};
|
|
|
|
MutableColumnPtr positions_column;
|
|
if (!positions_column)
|
|
positions_column = callForType(UInt8());
|
|
if (!positions_column)
|
|
positions_column = callForType(UInt16());
|
|
if (!positions_column)
|
|
positions_column = callForType(UInt32());
|
|
if (!positions_column)
|
|
positions_column = callForType(UInt64());
|
|
if (!positions_column)
|
|
throw Exception("Can't find index type for ColumnUnique", ErrorCodes::LOGICAL_ERROR);
|
|
|
|
updateNullMask();
|
|
|
|
return positions_column;
|
|
}
|
|
|
|
template <typename ColumnType>
|
|
IColumnUnique::IndexesWithOverflow ColumnUnique<ColumnType>::uniqueInsertRangeWithOverflow(
|
|
const IColumn & src,
|
|
size_t start,
|
|
size_t length,
|
|
size_t max_dictionary_size)
|
|
{
|
|
auto overflowed_keys = column_holder->cloneEmpty();
|
|
auto overflowed_keys_ptr = typeid_cast<ColumnType *>(overflowed_keys.get());
|
|
if (!overflowed_keys_ptr)
|
|
throw Exception("Invalid keys type for ColumnUnique.", ErrorCodes::LOGICAL_ERROR);
|
|
|
|
auto callForType = [this, &src, start, length, overflowed_keys_ptr, max_dictionary_size](auto x) -> MutableColumnPtr
|
|
{
|
|
size_t size = getRawColumnPtr()->size();
|
|
|
|
using IndexType = decltype(x);
|
|
if (size <= std::numeric_limits<IndexType>::max())
|
|
{
|
|
auto positions = ColumnVector<IndexType>::create(length);
|
|
ReverseIndex<UInt64, ColumnType> secondary_index(0, max_dictionary_size);
|
|
secondary_index.setColumn(overflowed_keys_ptr);
|
|
return this->uniqueInsertRangeImpl<IndexType>(src, start, length, 0, std::move(positions),
|
|
&secondary_index, max_dictionary_size);
|
|
}
|
|
|
|
return nullptr;
|
|
};
|
|
|
|
MutableColumnPtr positions_column;
|
|
if (!positions_column)
|
|
positions_column = callForType(UInt8());
|
|
if (!positions_column)
|
|
positions_column = callForType(UInt16());
|
|
if (!positions_column)
|
|
positions_column = callForType(UInt32());
|
|
if (!positions_column)
|
|
positions_column = callForType(UInt64());
|
|
if (!positions_column)
|
|
throw Exception("Can't find index type for ColumnUnique", ErrorCodes::LOGICAL_ERROR);
|
|
|
|
updateNullMask();
|
|
|
|
IColumnUnique::IndexesWithOverflow indexes_with_overflow;
|
|
indexes_with_overflow.indexes = std::move(positions_column);
|
|
indexes_with_overflow.overflowed_keys = std::move(overflowed_keys);
|
|
return indexes_with_overflow;
|
|
}
|
|
|
|
template <typename ColumnType>
|
|
UInt128 ColumnUnique<ColumnType>::IncrementalHash::getHash(const ColumnType & column)
|
|
{
|
|
size_t column_size = column.size();
|
|
UInt128 cur_hash;
|
|
|
|
if (column_size != num_added_rows.load())
|
|
{
|
|
SipHash sip_hash;
|
|
for (size_t i = 0; i < column_size; ++i)
|
|
column.updateHashWithValue(i, sip_hash);
|
|
|
|
std::lock_guard lock(mutex);
|
|
sip_hash.get128(hash.low, hash.high);
|
|
cur_hash = hash;
|
|
num_added_rows.store(column_size);
|
|
}
|
|
else
|
|
{
|
|
std::lock_guard lock(mutex);
|
|
cur_hash = hash;
|
|
}
|
|
|
|
return cur_hash;
|
|
}
|
|
|
|
}
|