Method printReadStorageRowCountStep

src/QueryPlan/GraphvizPrinter.cpp:2084–2137

}

String StepPrinter::printReadStorageRowCountStep(const ReadStorageRowCountStep & step)
{
    auto database_and_table = step.getDatabaseAndTableName();
    std::stringstream details;
    details << database_and_table.first << "." << database_and_table.second << "|";

    auto ast = step.getQuery();
    auto * query = ast->as<ASTSelectQuery>();
    if (query && query->getWhere())
    {
        details << "Filter : \\n";
        details << printFilter(query->refWhere());
        details << "|";
    }

    if (query && query->getPrewhere())
    {
        details << "Prewhere : \\n";
        details << printFilter(query->refPrewhere());
        details << "|";
    }

    details << "Functions:\\n";
    auto desc = step.getAggregateDescription();
    auto type_name = String(typeid(desc.function.get()).name());
    String func_name = desc.function->getName();
    if (type_name.find("AggregateFunctionNull"))
    {
        func_name = String("AggNull(").append(std::move(func_name)).append(")");
    }
    details << desc.column_name << ":=" << func_name;
    details << "( ";
    details << "Argument:";
    for (const auto & argument : desc.argument_names)
    {
        details << argument << " ";
    }
    details << "Types:";
    for (const auto & type : desc.function->getArgumentTypes())
    {
        details << type->getName() << " ";
    }
    details << ")";
    details << "\\n";
    details << "|";

    details << "Output \\n";
    for (auto & column : step.getOutputStream().header)
    {
        details << column.name << ":";
        details << column.type->getName() << "\\n";
    }
    return details.str();
}

String StepPrinter::printValuesStep(const ValuesStep & step)
{