replace fetchRow with fetch to honour pdostatement

db/itemmapper.php

@@ -80,7 +80,7 @@ class ItemMapper extends Mapper implements IMapper {
 
 		$params = array($userId);
 
-		$result = $this->execute($sql, $params)->fetchRow();
+		$result = $this->execute($sql, $params)->fetch();
 
 		return (int) $result['size'];
 	}
@@ -230,7 +230,7 @@ class ItemMapper extends Mapper implements IMapper {
 		$params = array($status, $threshold);
 		$result = $this->execute($sql, $params);
 
-		while($row = $result->fetchRow()) {
+		while($row = $result->fetch()) {
 
 			$size = (int) $row['size'];
 			$limit = $size - $threshold;

db/mapper.php

@@ -207,12 +207,12 @@ abstract class Mapper {
 	 */
 	protected function findOneQuery($sql, array $params=array(), $limit=null, $offset=null){
 		$result = $this->execute($sql, $params, $limit, $offset);
-		$row = $result->fetchRow();
+		$row = $result->fetch();
 
 		if($row === false || $row === null){
 			throw new DoesNotExistException('No matching entry found');
 		}
-		$row2 = $result->fetchRow();
+		$row2 = $result->fetch();
 		//MDB2 returns null, PDO and doctrine false when no row is available
 		if( ! ($row2 === false || $row2 === null )) {
 			throw new MultipleObjectsReturnedException('More than one result');
@@ -246,7 +246,7 @@ abstract class Mapper {
 
 		$entities = array();
 		
-		while($row = $result->fetchRow()){
+		while($row = $result->fetch()){
 			$entities[] = $this->mapRowToEntity($row);
 		}
 

db/postgres/itemmapper.php

@@ -44,7 +44,7 @@ class ItemMapper extends \OCA\News\Db\ItemMapper {
 		$params = array($status, $threshold);
 		$result = $this->execute($sql, $params);
 
-		while($row = $result->fetchRow()) {
+		while($row = $result->fetch()) {
 
 			$size = (int) $row['size'];
 			$limit = $size - $threshold;

utility/mappertestutility.php

@@ -42,7 +42,7 @@ abstract class MapperTestUtility extends \PHPUnit_Framework_TestCase {
 			->getMock();
 
 		$this->query = $this->getMock('Query', array('execute', 'bindValue'));
-		$this->pdoResult = $this->getMock('Result', array('fetchRow'));
+		$this->pdoResult = $this->getMock('Result', array('fetch'));
 		$this->queryAt = 0;
 		$this->prepareAt = 0;
 		$this->iterators = array();
@@ -68,7 +68,7 @@ abstract class MapperTestUtility extends \PHPUnit_Framework_TestCase {
 		$fetchAt = $this->fetchAt;
 
 		$this->pdoResult->expects($this->any())
-			->method('fetchRow')
+			->method('fetch')
 			->will($this->returnCallback(
 				function() use ($iterators, $fetchAt){
 					$iterator = $iterators[$fetchAt];