Method insertResultToColumn

src/Functions/FunctionSQLJSON.h:1137–1176

    static size_t getNumberOfIndexArguments(const ColumnsWithTypeAndName & arguments) { return arguments.size() - 1; }

    static bool insertResultToColumn(IColumn & dest, Iterator & iterator, ASTPtr & query_ptr, DialectType dialect_type) requires IsElementIterator<Iterator>
    {
        using Element = typename Iterator::Element;
        using JSONParser = typename Iterator::JSONParserType;
        GeneratorJSONPath<JSONParser> generator_json_path(query_ptr);
        Element current_element = iterator.getElement();
        VisitorStatus status;

        ColumnNullable & col = assert_cast<ColumnNullable &>(dest);
        while ((status = generator_json_path.getNextItem(current_element)) != VisitorStatus::Exhausted)
        {
            if (status == VisitorStatus::Ok)
            {
                break;
            }
            current_element = iterator.getElement();
        }

        if (status == VisitorStatus::Exhausted)
        {
            col.insertData(nullptr, 0);
            return false;
        }

        size_t size;
        if (current_element.isArray())
            size = current_element.getArray().size();
        else if (current_element.isObject())
            size = current_element.getObject().size();
        else
        {
            if (dialect_type == DialectType::MYSQL)
                size = 0;
            else
                size = 1;
        }
        
        col.insert(size);
        return true;
    }

    static bool insertResultToColumn(IColumn & dest, ObjectIterator & iterator, ASTPtr & query_ptr, DialectType dialect_type) requires IsObjectIterator<Iterator>
    {