Function arrayFunc

utils/db-generator/query_db_generator.cpp:725–772

}

FuncRet arrayFunc(DB::ASTPtr ch, std::map<std::string, Column> & columns)
{
    auto x = std::dynamic_pointer_cast<DB::ASTFunction>(ch);
    if (x)
    {
        std::set<std::string> indents = {};
        std::string value = "[";
        ColumnType type_value = Type::i | Type::f | Type::d | Type::dt | Type::s;
        bool no_indent = true;
        for (const auto & arg : x->arguments->children)
        {
            auto ident = std::dynamic_pointer_cast<DB::ASTIdentifier>(arg);
            if (ident)
            {
                no_indent = false;
                indents.insert(ident->name());
            }
            auto literal = std::dynamic_pointer_cast<DB::ASTLiteral>(arg);
            if (literal)
            {
                ColumnType type = type_cast(literal->value.getType());
                if (type == Type::s || type == Type::d || type == Type::dt)
                    type = time_type(value);
                type_value &= type;

                if (value != "[")
                    value += ", ";
                value += applyVisitor(DB::FieldVisitorToString(), literal->value);
            }
        }
        for (const auto & indent : indents)
        {
            auto c = Column(indent);
            c.type = type_value;
            if (columns.count(indent))
                columns[indent].merge(c);
            else
                columns[indent] = c;
        }
        value += ']';
        FuncRet r(type_value, "");
        r.is_array = true;
        if (no_indent)
            r.value = value;
        return r;
    }
    return FuncRet();
}
FuncRet arithmeticFunc(DB::ASTPtr ch, std::map<std::string, Column> & columns)
{
    auto x = std::dynamic_pointer_cast<DB::ASTFunction>(ch);