[2.0.x] [BUG] fixing bug and other enchantments

[KorsaR-ZN]

fixing bug (prev PR #10144):

$builder = $model->getModelsManager()->createBuilder()
->columns($columns)
   ->addFrom('CartItems', 's')
   ->where('s.cart_id="6086"')
   ->groupBy('s.product_id');

echo $readConnection->getDialect()->select($q->getQuery()->parse());

Result:

SELECT ``, ``, ``, ``, ``, ``, ``, ``, ``, ``, ``, ``, ``, ``, ``, `` FROM `cart_items` AS `s` WHERE `s`.`cart_id` = '6086' GROUP BY `s`.`product_id`

[KorsaR-ZN]

fix for #10160, #10135

[andresgutierrez]

Could you please leave method signatures as they were? Change them could break existing applications

[KorsaR-ZN]

@andresgutierrez I will send other PR