ref #9436
Currently EPHEMERAL column requires an explicit default value provided on CREATE TABLE - we can allow implicit default there

auto ast_rename = std::make_shared<ASTRenameQuery>();
        ASTRenameQuery::Element elem
        {
            ASTRenameQuery::Table{create.getDatabase(), create.getTable()},
            ASTRenameQuery::Table{create.getDatabase(), table_to_replace_name}
        };
        ast_rename->elements.push_back(std::move(elem));
        ast_rename->dictionary = create.is_dictionary;
        if (create.create_or_replace)
        {
            
            
            ast_rename->rename_if_cannot_exchange = true;
            ast_rename->exchange = false;
        }
        else
        {
            
            
            ast_rename->exchange = true;
        }
        InterpreterRenameQuery interpreter_rename{ast_rename, current_context};
        interpreter_rename.execute();
        renamed = true;
        if (!interpreter_rename.renamedInsteadOfExchange())
        {
            
            auto drop_context = make_drop_context(false);
            InterpreterDropQuery(ast_drop, drop_context).execute();
        }