Method addTableFunction

src/Parsers/ASTSelectQuery.cpp:481–503

void ASTSelectQuery::addTableFunction(const ASTPtr & table_function_ptr)
{
    ASTTableExpression * table_expression = getFirstTableExpression(*this);

    if (!table_expression)
    {
        setExpression(Expression::TABLES, make_intrusive<ASTTablesInSelectQuery>());
        auto element = make_intrusive<ASTTablesInSelectQueryElement>();
        auto table_expr = make_intrusive<ASTTableExpression>();
        element->table_expression = table_expr;
        element->children.emplace_back(table_expr);
        tables()->children.emplace_back(element);
        table_expression = table_expr.get();
    }

    String table_alias = getTableExpressionAlias(table_expression);
    /// Maybe need to modify the alias, so we should clone new table_function node
    table_expression->setOrReplace(table_expression->table_function, table_function_ptr->clone());
    table_expression->reset(table_expression->database_and_table_name);

    if (table_alias.empty())
        table_expression->table_function->setAlias(table_alias);
}

void ASTSelectQuery::setExpression(Expression expr, ASTPtr && ast)
{