Function constructInfoBlock

src/Interpreters/InterpreterCreateStatsQuery.cpp:48–87

using namespace Statistics::AutoStats;

static Block constructInfoBlock(
    ContextPtr context, const String & table_name, UInt64 column_count, String row_count_or_error, double time, bool only_header = false)
{
    Block block;
    auto append_str_column = [&](String header, String value) {
        ColumnWithTypeAndName tuple;
        tuple.name = header;
        tuple.type = std::make_shared<DataTypeString>();
        auto col = tuple.type->createColumn();
        if (!only_header) 
        {
            col->insertData(value.data(), value.size());
        }
        tuple.column = std::move(col);
        block.insert(std::move(tuple));
    };

    auto append_num_column = [&]<typename T>(String header, T value) {
        static_assert(std::is_trivial_v<T>);
        ColumnWithTypeAndName tuple;
        tuple.name = header;
        tuple.type = std::make_shared<DataTypeNumber<T>>();
        auto col = ColumnVector<T>::create();
        if (!only_header) 
        {
            col->insertValue(value);
        }
        tuple.column = std::move(col);
        block.insert(std::move(tuple));
    };

    append_str_column("table_name", table_name);
    append_num_column("column_count", column_count);
    append_str_column("row_count_or_error", row_count_or_error);
    if (context->getSettingsRef().create_stats_time_output)
    {
        append_num_column("elapsed_time", time);
    }
    return block;
}


namespace