/**
* Delete unnecessary links.
*
* @return $this
*/
protected function _deleteData()
{
$linkTable = $this->_resource->getTableName('catalog_product_super_link');
$relationTable = $this->_resource->getTableName('catalog_product_relation');
if ($this->_entityModel->getBehavior() == \Magento\ImportExport\Model\Import::BEHAVIOR_APPEND && !empty($this->_productSuperData['product_id']) && !empty($this->_simpleIdsToDelete)) {
$quoted = $this->_connection->quoteInto('IN (?)', [$this->_productSuperData['product_id']]);
$quotedChildren = $this->_connection->quoteInto('IN (?)', $this->_simpleIdsToDelete);
$this->_connection->delete($linkTable, "parent_id {$quoted} AND product_id {$quotedChildren}");
$this->_connection->delete($relationTable, "parent_id {$quoted} AND child_id {$quotedChildren}");
}
return $this;
}