public function checkHelpful($rid ,$pid ,$uid )
    $connection = $this->objectManager->get('Magento\Framework\App\ResourceConnection');
    $tbl = $connection->getTableName('catalog/product_index_price');
    echo $table;

the output of this is 'catalog/product_index_price'. Not getting the exact table name with prefix.


Try this

 protected $_resource;

 public function __construct(
    \Magento\Backend\App\Action\Context $context,
    \Magento\Framework\App\ResourceConnection $resource
    ) {
    $this->_resource = $resource;

public function execute()

    $connection  = $this->_resource->getConnection();
    $tableName   = $connection->getTableName('tablename_without_prefix'); // It will return table with prefix

    $mapsDeleteQuery = "your raw SQL Query";
  • I implemented the same thing, but its giving me the same result as previous (table name without prefix). – Ashish Jagnani Aug 11 '16 at 11:07

I got the solution of this issue, instead of using this

$connection  = $this->_resource->getConnection();

We have to use this :

$connection  = $this->_resource; OR

$connection = $this->_objectManager->create('\Magento\Framework\App\ResourceConnection');

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