Function reconstructTupleColumnsRecursive

src/DataTypes/NestedUtils.cpp:435–457

Reconstruct tuple columns: input header and flattened columns, return a new vector with tuples reconstructed

/// Reconstruct tuple columns: input header and flattened columns, return a new vector with tuples reconstructed
Columns reconstructTupleColumnsRecursive(const Block & header, const Columns & flattened_columns)
{
    Columns result;
    result.reserve(header.columns());
    size_t flattened_idx = 0;

    for (size_t i = 0; i < header.columns(); ++i)
    {
        const auto & header_col = header.getByPosition(i);
        result.push_back(reconstructTupleColumnImpl(header_col.type, flattened_columns, flattened_idx));
    }

    if (flattened_idx != flattened_columns.size())
    {
        throw Exception(
            ErrorCodes::LOGICAL_ERROR,
            "reconstructTupleColumnsRecursive: consumed {} flattened columns, but total flattened columns count is {}",
            flattened_idx,
            flattened_columns.size());
    }

    return result;
}

namespace
{