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720 lines
23 KiB
C++
720 lines
23 KiB
C++
#include <Columns/ColumnLowCardinality.h>
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#include <Columns/ColumnsNumber.h>
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#include <DataStreams/ColumnGathererStream.h>
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#include <DataTypes/NumberTraits.h>
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#include <Common/HashTable/HashMap.h>
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#include <Common/assert_cast.h>
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#include <Common/WeakHash.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 ILLEGAL_COLUMN;
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extern const int LOGICAL_ERROR;
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}
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namespace
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{
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void checkColumn(const IColumn & column)
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{
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if (!dynamic_cast<const IColumnUnique *>(&column))
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throw Exception("ColumnUnique expected as an argument of ColumnLowCardinality.", ErrorCodes::ILLEGAL_COLUMN);
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}
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template <typename T>
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PaddedPODArray<T> * getIndexesData(IColumn & indexes)
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{
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auto * column = typeid_cast<ColumnVector<T> *>(&indexes);
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if (column)
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return &column->getData();
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return nullptr;
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}
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template <typename T>
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MutableColumnPtr mapUniqueIndexImplRef(PaddedPODArray<T> & index)
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{
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PaddedPODArray<T> copy(index.cbegin(), index.cend());
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HashMap<T, T> hash_map;
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for (auto val : index)
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hash_map.insert({val, hash_map.size()});
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auto res_col = ColumnVector<T>::create();
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auto & data = res_col->getData();
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data.resize(hash_map.size());
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for (const auto & val : hash_map)
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data[val.getMapped()] = val.getKey();
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for (auto & ind : index)
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ind = hash_map[ind];
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for (size_t i = 0; i < index.size(); ++i)
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if (data[index[i]] != copy[i])
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throw Exception("Expected " + toString(data[index[i]]) + ", but got " + toString(copy[i]), ErrorCodes::LOGICAL_ERROR);
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return res_col;
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}
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template <typename T>
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MutableColumnPtr mapUniqueIndexImpl(PaddedPODArray<T> & index)
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{
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if (index.empty())
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return ColumnVector<T>::create();
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auto size = index.size();
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T max_val = index[0];
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for (size_t i = 1; i < size; ++i)
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max_val = std::max(max_val, index[i]);
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/// May happen when dictionary is shared.
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if (max_val > size)
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return mapUniqueIndexImplRef(index);
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auto map_size = UInt64(max_val) + 1;
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PaddedPODArray<T> map(map_size, 0);
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T zero_pos_value = index[0];
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index[0] = 0;
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T cur_pos = 0;
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for (size_t i = 1; i < size; ++i)
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{
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T val = index[i];
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if (val != zero_pos_value && map[val] == 0)
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{
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++cur_pos;
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map[val] = cur_pos;
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}
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index[i] = map[val];
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}
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auto res_col = ColumnVector<T>::create(UInt64(cur_pos) + 1);
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auto & data = res_col->getData();
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data[0] = zero_pos_value;
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for (size_t i = 0; i < map_size; ++i)
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{
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auto val = map[i];
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if (val)
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data[val] = static_cast<T>(i);
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}
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return res_col;
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}
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/// Returns unique values of column. Write new index to column.
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MutableColumnPtr mapUniqueIndex(IColumn & column)
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{
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if (auto * data_uint8 = getIndexesData<UInt8>(column))
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return mapUniqueIndexImpl(*data_uint8);
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else if (auto * data_uint16 = getIndexesData<UInt16>(column))
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return mapUniqueIndexImpl(*data_uint16);
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else if (auto * data_uint32 = getIndexesData<UInt32>(column))
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return mapUniqueIndexImpl(*data_uint32);
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else if (auto * data_uint64 = getIndexesData<UInt64>(column))
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return mapUniqueIndexImpl(*data_uint64);
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else
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throw Exception("Indexes column for getUniqueIndex must be ColumnUInt, got" + column.getName(),
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ErrorCodes::LOGICAL_ERROR);
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}
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}
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ColumnLowCardinality::ColumnLowCardinality(MutableColumnPtr && column_unique_, MutableColumnPtr && indexes_, bool is_shared)
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: dictionary(std::move(column_unique_), is_shared), idx(std::move(indexes_))
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{
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idx.check(getDictionary().size());
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}
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void ColumnLowCardinality::insert(const Field & x)
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{
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compactIfSharedDictionary();
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idx.insertPosition(dictionary.getColumnUnique().uniqueInsert(x));
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idx.check(getDictionary().size());
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}
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void ColumnLowCardinality::insertDefault()
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{
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idx.insertPosition(getDictionary().getDefaultValueIndex());
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}
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void ColumnLowCardinality::insertFrom(const IColumn & src, size_t n)
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{
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auto * low_cardinality_src = typeid_cast<const ColumnLowCardinality *>(&src);
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if (!low_cardinality_src)
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throw Exception("Expected ColumnLowCardinality, got" + src.getName(), ErrorCodes::ILLEGAL_COLUMN);
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size_t position = low_cardinality_src->getIndexes().getUInt(n);
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if (&low_cardinality_src->getDictionary() == &getDictionary())
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{
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/// Dictionary is shared with src column. Insert only index.
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idx.insertPosition(position);
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}
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else
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{
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compactIfSharedDictionary();
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const auto & nested = *low_cardinality_src->getDictionary().getNestedColumn();
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idx.insertPosition(dictionary.getColumnUnique().uniqueInsertFrom(nested, position));
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}
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idx.check(getDictionary().size());
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}
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void ColumnLowCardinality::insertFromFullColumn(const IColumn & src, size_t n)
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{
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compactIfSharedDictionary();
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idx.insertPosition(dictionary.getColumnUnique().uniqueInsertFrom(src, n));
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idx.check(getDictionary().size());
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}
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void ColumnLowCardinality::insertRangeFrom(const IColumn & src, size_t start, size_t length)
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{
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auto * low_cardinality_src = typeid_cast<const ColumnLowCardinality *>(&src);
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if (!low_cardinality_src)
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throw Exception("Expected ColumnLowCardinality, got " + src.getName(), ErrorCodes::ILLEGAL_COLUMN);
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if (&low_cardinality_src->getDictionary() == &getDictionary())
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{
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/// Dictionary is shared with src column. Insert only indexes.
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idx.insertPositionsRange(low_cardinality_src->getIndexes(), start, length);
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}
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else
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{
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compactIfSharedDictionary();
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/// TODO: Support native insertion from other unique column. It will help to avoid null map creation.
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auto sub_idx = (*low_cardinality_src->getIndexes().cut(start, length)).mutate();
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auto idx_map = mapUniqueIndex(*sub_idx);
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auto src_nested = low_cardinality_src->getDictionary().getNestedColumn();
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auto used_keys = src_nested->index(*idx_map, 0);
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auto inserted_indexes = dictionary.getColumnUnique().uniqueInsertRangeFrom(*used_keys, 0, used_keys->size());
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idx.insertPositionsRange(*inserted_indexes->index(*sub_idx, 0), 0, length);
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}
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idx.check(getDictionary().size());
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}
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void ColumnLowCardinality::insertRangeFromFullColumn(const IColumn & src, size_t start, size_t length)
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{
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compactIfSharedDictionary();
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auto inserted_indexes = dictionary.getColumnUnique().uniqueInsertRangeFrom(src, start, length);
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idx.insertPositionsRange(*inserted_indexes, 0, length);
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idx.check(getDictionary().size());
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}
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void ColumnLowCardinality::insertRangeFromDictionaryEncodedColumn(const IColumn & keys, const IColumn & positions)
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{
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Index(positions.getPtr()).check(keys.size());
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compactIfSharedDictionary();
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auto inserted_indexes = dictionary.getColumnUnique().uniqueInsertRangeFrom(keys, 0, keys.size());
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idx.insertPositionsRange(*inserted_indexes->index(positions, 0), 0, positions.size());
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idx.check(getDictionary().size());
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}
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void ColumnLowCardinality::insertData(const char * pos, size_t length)
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{
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compactIfSharedDictionary();
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idx.insertPosition(dictionary.getColumnUnique().uniqueInsertData(pos, length));
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idx.check(getDictionary().size());
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}
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StringRef ColumnLowCardinality::serializeValueIntoArena(size_t n, Arena & arena, char const *& begin) const
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{
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return getDictionary().serializeValueIntoArena(getIndexes().getUInt(n), arena, begin);
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}
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const char * ColumnLowCardinality::deserializeAndInsertFromArena(const char * pos)
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{
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compactIfSharedDictionary();
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const char * new_pos;
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idx.insertPosition(dictionary.getColumnUnique().uniqueDeserializeAndInsertFromArena(pos, new_pos));
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idx.check(getDictionary().size());
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return new_pos;
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}
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void ColumnLowCardinality::updateWeakHash32(WeakHash32 & hash) const
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{
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auto s = size();
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if (hash.getData().size() != s)
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throw Exception("Size of WeakHash32 does not match size of column: column size is " + std::to_string(s) +
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", hash size is " + std::to_string(hash.getData().size()), ErrorCodes::LOGICAL_ERROR);
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auto & dict = getDictionary().getNestedColumn();
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WeakHash32 dict_hash(dict->size());
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dict->updateWeakHash32(dict_hash);
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idx.updateWeakHash(hash, dict_hash);
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}
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void ColumnLowCardinality::gather(ColumnGathererStream & gatherer)
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{
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gatherer.gather(*this);
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}
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MutableColumnPtr ColumnLowCardinality::cloneResized(size_t size) const
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{
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auto unique_ptr = dictionary.getColumnUniquePtr();
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if (size == 0)
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unique_ptr = unique_ptr->cloneEmpty();
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return ColumnLowCardinality::create((*std::move(unique_ptr)).mutate(), getIndexes().cloneResized(size));
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}
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int ColumnLowCardinality::compareAt(size_t n, size_t m, const IColumn & rhs, int nan_direction_hint) const
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{
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const auto & low_cardinality_column = assert_cast<const ColumnLowCardinality &>(rhs);
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size_t n_index = getIndexes().getUInt(n);
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size_t m_index = low_cardinality_column.getIndexes().getUInt(m);
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return getDictionary().compareAt(n_index, m_index, low_cardinality_column.getDictionary(), nan_direction_hint);
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}
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void ColumnLowCardinality::getPermutation(bool reverse, size_t limit, int nan_direction_hint, Permutation & res) const
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{
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if (limit == 0)
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limit = size();
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size_t unique_limit = getDictionary().size();
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Permutation unique_perm;
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getDictionary().getNestedColumn()->getPermutation(reverse, unique_limit, nan_direction_hint, unique_perm);
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/// TODO: optimize with sse.
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/// Get indexes per row in column_unique.
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std::vector<std::vector<size_t>> indexes_per_row(getDictionary().size());
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size_t indexes_size = getIndexes().size();
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for (size_t row = 0; row < indexes_size; ++row)
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indexes_per_row[getIndexes().getUInt(row)].push_back(row);
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/// Replicate permutation.
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size_t perm_size = std::min(indexes_size, limit);
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res.resize(perm_size);
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size_t perm_index = 0;
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for (size_t row = 0; row < unique_perm.size() && perm_index < perm_size; ++row)
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{
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const auto & row_indexes = indexes_per_row[unique_perm[row]];
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for (auto row_index : row_indexes)
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{
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res[perm_index] = row_index;
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++perm_index;
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if (perm_index == perm_size)
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break;
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}
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}
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}
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std::vector<MutableColumnPtr> ColumnLowCardinality::scatter(ColumnIndex num_columns, const Selector & selector) const
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{
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auto columns = getIndexes().scatter(num_columns, selector);
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for (auto & column : columns)
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{
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auto unique_ptr = dictionary.getColumnUniquePtr();
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column = ColumnLowCardinality::create((*std::move(unique_ptr)).mutate(), std::move(column));
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}
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return columns;
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}
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void ColumnLowCardinality::setSharedDictionary(const ColumnPtr & column_unique)
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{
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if (!empty())
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throw Exception("Can't set ColumnUnique for ColumnLowCardinality because is't not empty.",
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ErrorCodes::LOGICAL_ERROR);
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dictionary.setShared(column_unique);
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}
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ColumnLowCardinality::MutablePtr ColumnLowCardinality::cutAndCompact(size_t start, size_t length) const
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{
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auto sub_positions = (*idx.getPositions()->cut(start, length)).mutate();
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/// Create column with new indexes and old dictionary.
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/// Dictionary is shared, but will be recreated after compactInplace call.
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auto column = ColumnLowCardinality::create(getDictionary().assumeMutable(), std::move(sub_positions));
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/// Will create new dictionary.
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column->compactInplace();
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return column;
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}
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void ColumnLowCardinality::compactInplace()
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{
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auto positions = idx.detachPositions();
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dictionary.compact(positions);
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idx.attachPositions(std::move(positions));
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}
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void ColumnLowCardinality::compactIfSharedDictionary()
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{
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if (dictionary.isShared())
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compactInplace();
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}
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ColumnLowCardinality::DictionaryEncodedColumn
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ColumnLowCardinality::getMinimalDictionaryEncodedColumn(UInt64 offset, UInt64 limit) const
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{
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MutableColumnPtr sub_indexes = (*std::move(idx.getPositions()->cut(offset, limit))).mutate();
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auto indexes_map = mapUniqueIndex(*sub_indexes);
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auto sub_keys = getDictionary().getNestedColumn()->index(*indexes_map, 0);
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return {std::move(sub_keys), std::move(sub_indexes)};
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}
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ColumnPtr ColumnLowCardinality::countKeys() const
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{
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const auto & nested_column = getDictionary().getNestedColumn();
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size_t dict_size = nested_column->size();
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auto counter = ColumnUInt64::create(dict_size, 0);
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idx.countKeys(counter->getData());
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return counter;
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}
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bool ColumnLowCardinality::containsNull() const
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{
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return getDictionary().nestedColumnIsNullable() && idx.containsDefault();
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}
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ColumnLowCardinality::Index::Index() : positions(ColumnUInt8::create()), size_of_type(sizeof(UInt8)) {}
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ColumnLowCardinality::Index::Index(MutableColumnPtr && positions_) : positions(std::move(positions_))
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{
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updateSizeOfType();
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}
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ColumnLowCardinality::Index::Index(ColumnPtr positions_) : positions(std::move(positions_))
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{
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updateSizeOfType();
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}
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template <typename Callback>
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void ColumnLowCardinality::Index::callForType(Callback && callback, size_t size_of_type)
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{
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switch (size_of_type)
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{
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case sizeof(UInt8): { callback(UInt8()); break; }
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case sizeof(UInt16): { callback(UInt16()); break; }
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case sizeof(UInt32): { callback(UInt32()); break; }
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case sizeof(UInt64): { callback(UInt64()); break; }
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default: {
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throw Exception("Unexpected size of index type for ColumnLowCardinality: " + toString(size_of_type),
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ErrorCodes::LOGICAL_ERROR);
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}
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}
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}
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size_t ColumnLowCardinality::Index::getSizeOfIndexType(const IColumn & column, size_t hint)
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{
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auto check_for = [&](auto type) { return typeid_cast<const ColumnVector<decltype(type)> *>(&column) != nullptr; };
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auto try_get_size_for = [&](auto type) -> size_t { return check_for(type) ? sizeof(decltype(type)) : 0; };
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if (hint)
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{
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size_t size = 0;
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callForType([&](auto type) { size = try_get_size_for(type); }, hint);
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if (size)
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return size;
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}
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if (auto size = try_get_size_for(UInt8()))
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return size;
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if (auto size = try_get_size_for(UInt16()))
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return size;
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if (auto size = try_get_size_for(UInt32()))
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return size;
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if (auto size = try_get_size_for(UInt64()))
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return size;
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throw Exception("Unexpected indexes type for ColumnLowCardinality. Expected UInt, got " + column.getName(),
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ErrorCodes::ILLEGAL_COLUMN);
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}
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void ColumnLowCardinality::Index::attachPositions(ColumnPtr positions_)
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{
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positions = std::move(positions_);
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updateSizeOfType();
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}
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template <typename IndexType>
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typename ColumnVector<IndexType>::Container & ColumnLowCardinality::Index::getPositionsData()
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{
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auto * positions_ptr = typeid_cast<ColumnVector<IndexType> *>(positions->assumeMutable().get());
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if (!positions_ptr)
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throw Exception("Invalid indexes type for ColumnLowCardinality."
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" Expected UInt" + toString(8 * sizeof(IndexType)) + ", got " + positions->getName(),
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ErrorCodes::LOGICAL_ERROR);
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return positions_ptr->getData();
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}
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template <typename IndexType>
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const typename ColumnVector<IndexType>::Container & ColumnLowCardinality::Index::getPositionsData() const
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{
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const auto * positions_ptr = typeid_cast<const ColumnVector<IndexType> *>(positions.get());
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if (!positions_ptr)
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throw Exception("Invalid indexes type for ColumnLowCardinality."
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" Expected UInt" + toString(8 * sizeof(IndexType)) + ", got " + positions->getName(),
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ErrorCodes::LOGICAL_ERROR);
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return positions_ptr->getData();
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}
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template <typename IndexType>
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void ColumnLowCardinality::Index::convertPositions()
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{
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auto convert = [&](auto x)
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{
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using CurIndexType = decltype(x);
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auto & data = getPositionsData<CurIndexType>();
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if (sizeof(CurIndexType) > sizeof(IndexType))
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throw Exception("Converting indexes to smaller type: from " + toString(sizeof(CurIndexType)) +
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" to " + toString(sizeof(IndexType)), ErrorCodes::LOGICAL_ERROR);
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if (sizeof(CurIndexType) != sizeof(IndexType))
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{
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size_t size = data.size();
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auto new_positions = ColumnVector<IndexType>::create(size);
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auto & new_data = new_positions->getData();
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/// TODO: Optimize with SSE?
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for (size_t i = 0; i < size; ++i)
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new_data[i] = data[i];
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positions = std::move(new_positions);
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size_of_type = sizeof(IndexType);
|
|
}
|
|
};
|
|
|
|
callForType(std::move(convert), size_of_type);
|
|
|
|
checkSizeOfType();
|
|
}
|
|
|
|
void ColumnLowCardinality::Index::expandType()
|
|
{
|
|
auto expand = [&](auto type)
|
|
{
|
|
using CurIndexType = decltype(type);
|
|
constexpr auto next_size = NumberTraits::nextSize(sizeof(CurIndexType));
|
|
if (next_size == sizeof(CurIndexType))
|
|
throw Exception("Can't expand indexes type for ColumnLowCardinality from type: "
|
|
+ demangle(typeid(CurIndexType).name()), ErrorCodes::LOGICAL_ERROR);
|
|
|
|
using NewIndexType = typename NumberTraits::Construct<false, false, next_size>::Type;
|
|
convertPositions<NewIndexType>();
|
|
};
|
|
|
|
callForType(std::move(expand), size_of_type);
|
|
}
|
|
|
|
UInt64 ColumnLowCardinality::Index::getMaxPositionForCurrentType() const
|
|
{
|
|
UInt64 value = 0;
|
|
callForType([&](auto type) { value = std::numeric_limits<decltype(type)>::max(); }, size_of_type);
|
|
return value;
|
|
}
|
|
|
|
size_t ColumnLowCardinality::Index::getPositionAt(size_t row) const
|
|
{
|
|
size_t pos;
|
|
auto get_position = [&](auto type)
|
|
{
|
|
using CurIndexType = decltype(type);
|
|
pos = getPositionsData<CurIndexType>()[row];
|
|
};
|
|
|
|
callForType(std::move(get_position), size_of_type);
|
|
return pos;
|
|
}
|
|
|
|
void ColumnLowCardinality::Index::insertPosition(UInt64 position)
|
|
{
|
|
while (position > getMaxPositionForCurrentType())
|
|
expandType();
|
|
|
|
positions->insert(position);
|
|
checkSizeOfType();
|
|
}
|
|
|
|
void ColumnLowCardinality::Index::insertPositionsRange(const IColumn & column, UInt64 offset, UInt64 limit)
|
|
{
|
|
auto insert_for_type = [&](auto type)
|
|
{
|
|
using ColumnType = decltype(type);
|
|
const auto * column_ptr = typeid_cast<const ColumnVector<ColumnType> *>(&column);
|
|
|
|
if (!column_ptr)
|
|
return false;
|
|
|
|
if (size_of_type < sizeof(ColumnType))
|
|
convertPositions<ColumnType>();
|
|
|
|
if (size_of_type == sizeof(ColumnType))
|
|
positions->insertRangeFrom(column, offset, limit);
|
|
else
|
|
{
|
|
auto copy = [&](auto cur_type)
|
|
{
|
|
using CurIndexType = decltype(cur_type);
|
|
auto & positions_data = getPositionsData<CurIndexType>();
|
|
const auto & column_data = column_ptr->getData();
|
|
|
|
UInt64 size = positions_data.size();
|
|
positions_data.resize(size + limit);
|
|
|
|
for (UInt64 i = 0; i < limit; ++i)
|
|
positions_data[size + i] = column_data[offset + i];
|
|
};
|
|
|
|
callForType(std::move(copy), size_of_type);
|
|
}
|
|
|
|
return true;
|
|
};
|
|
|
|
if (!insert_for_type(UInt8()) &&
|
|
!insert_for_type(UInt16()) &&
|
|
!insert_for_type(UInt32()) &&
|
|
!insert_for_type(UInt64()))
|
|
throw Exception("Invalid column for ColumnLowCardinality index. Expected UInt, got " + column.getName(),
|
|
ErrorCodes::ILLEGAL_COLUMN);
|
|
|
|
checkSizeOfType();
|
|
}
|
|
|
|
void ColumnLowCardinality::Index::check(size_t /*max_dictionary_size*/)
|
|
{
|
|
/// TODO: remove
|
|
/*
|
|
auto check = [&](auto cur_type)
|
|
{
|
|
using CurIndexType = decltype(cur_type);
|
|
auto & positions_data = getPositionsData<CurIndexType>();
|
|
|
|
for (size_t i = 0; i < positions_data.size(); ++i)
|
|
{
|
|
if (positions_data[i] >= max_dictionary_size)
|
|
{
|
|
throw Exception("Found index " + toString(positions_data[i]) + " at position " + toString(i)
|
|
+ " which is grated or equal than dictionary size " + toString(max_dictionary_size),
|
|
ErrorCodes::LOGICAL_ERROR);
|
|
}
|
|
}
|
|
};
|
|
|
|
callForType(std::move(check), size_of_type);
|
|
*/
|
|
}
|
|
|
|
void ColumnLowCardinality::Index::checkSizeOfType()
|
|
{
|
|
if (size_of_type != getSizeOfIndexType(*positions, size_of_type))
|
|
throw Exception("Invalid size of type. Expected " + toString(8 * size_of_type) +
|
|
", but positions are " + positions->getName(), ErrorCodes::LOGICAL_ERROR);
|
|
}
|
|
|
|
void ColumnLowCardinality::Index::countKeys(ColumnUInt64::Container & counts) const
|
|
{
|
|
auto counter = [&](auto x)
|
|
{
|
|
using CurIndexType = decltype(x);
|
|
auto & data = getPositionsData<CurIndexType>();
|
|
for (auto pos : data)
|
|
++counts[pos];
|
|
};
|
|
callForType(std::move(counter), size_of_type);
|
|
}
|
|
|
|
bool ColumnLowCardinality::Index::containsDefault() const
|
|
{
|
|
bool contains = false;
|
|
|
|
auto check_contains_default = [&](auto x)
|
|
{
|
|
using CurIndexType = decltype(x);
|
|
auto & data = getPositionsData<CurIndexType>();
|
|
for (auto pos : data)
|
|
{
|
|
if (pos == 0)
|
|
{
|
|
contains = true;
|
|
break;
|
|
}
|
|
}
|
|
};
|
|
|
|
callForType(std::move(check_contains_default), size_of_type);
|
|
return contains;
|
|
}
|
|
|
|
void ColumnLowCardinality::Index::updateWeakHash(WeakHash32 & hash, WeakHash32 & dict_hash) const
|
|
{
|
|
auto & hash_data = hash.getData();
|
|
auto & dict_hash_data = dict_hash.getData();
|
|
|
|
auto update_weak_hash = [&](auto x)
|
|
{
|
|
using CurIndexType = decltype(x);
|
|
auto & data = getPositionsData<CurIndexType>();
|
|
auto size = data.size();
|
|
|
|
for (size_t i = 0; i < size; ++i)
|
|
hash_data[i] = intHashCRC32(dict_hash_data[data[i]], hash_data[i]);
|
|
};
|
|
|
|
callForType(std::move(update_weak_hash), size_of_type);
|
|
}
|
|
|
|
|
|
ColumnLowCardinality::Dictionary::Dictionary(MutableColumnPtr && column_unique_, bool is_shared)
|
|
: column_unique(std::move(column_unique_)), shared(is_shared)
|
|
{
|
|
checkColumn(*column_unique);
|
|
}
|
|
ColumnLowCardinality::Dictionary::Dictionary(ColumnPtr column_unique_, bool is_shared)
|
|
: column_unique(std::move(column_unique_)), shared(is_shared)
|
|
{
|
|
checkColumn(*column_unique);
|
|
}
|
|
|
|
void ColumnLowCardinality::Dictionary::setShared(const ColumnPtr & column_unique_)
|
|
{
|
|
checkColumn(*column_unique_);
|
|
|
|
column_unique = column_unique_;
|
|
shared = true;
|
|
}
|
|
|
|
void ColumnLowCardinality::Dictionary::compact(ColumnPtr & positions)
|
|
{
|
|
auto new_column_unique = column_unique->cloneEmpty();
|
|
|
|
auto & unique = getColumnUnique();
|
|
auto & new_unique = static_cast<IColumnUnique &>(*new_column_unique);
|
|
|
|
auto indexes = mapUniqueIndex(positions->assumeMutableRef());
|
|
auto sub_keys = unique.getNestedColumn()->index(*indexes, 0);
|
|
auto new_indexes = new_unique.uniqueInsertRangeFrom(*sub_keys, 0, sub_keys->size());
|
|
|
|
positions = (*new_indexes->index(*positions, 0)).mutate();
|
|
column_unique = std::move(new_column_unique);
|
|
|
|
shared = false;
|
|
}
|
|
|
|
}
|