Method getNumFlatTuples

src/processor/result/factorized_table.cpp:268–282

}

uint64_t FactorizedTable::getNumFlatTuples(ft_tuple_idx_t tupleIdx) const {
    std::unordered_map<uint32_t, bool> calculatedGroups;
    uint64_t numFlatTuples = 1;
    auto tupleBuffer = getTuple(tupleIdx);
    for (auto i = 0u; i < tableSchema.getNumColumns(); i++) {
        auto column = tableSchema.getColumn(i);
        auto groupID = column->getGroupID();
        if (!calculatedGroups.contains(groupID)) {
            calculatedGroups[groupID] = true;
            numFlatTuples *= column->isFlat() ? 1 : ((overflow_value_t*)tupleBuffer)->numElements;
        }
        tupleBuffer += column->getNumBytes();
    }
    return numFlatTuples;
}

uint8_t* FactorizedTable::getTuple(ft_tuple_idx_t tupleIdx) const {
    DASSERT(tupleIdx < numTuples);