code: public function build(ExpressionInterface $expression, array &$params = [])
      {
          if (!isset($this->escapingReplacements['\\'])) {
              /*
               * Different pdo_oci8 versions may or may not implement PDO::quote(), so
               * yii\db\Schema::quoteValue() may or may not quote \.
               */
              $this->escapingReplacements['\\'] = substr($this->queryBuilder->db->quoteValue('\\'), 1, -1);
          }
  
          return parent::build($expression, $params);
      }
docs: {@inheritdoc}