perf: remove unneeded sort when listing mail shares

Signed-off-by: Robin Appelman <robin@icewind.nl>

apps/sharebymail/lib/ShareByMailProvider.php

@@ -644,8 +644,7 @@ class ShareByMailProvider extends DefaultShareProvider implements IShareProvider
 		$qb->select('*')
 			->from('share')
 			->where($qb->expr()->eq('parent', $qb->createNamedParameter($parent->getId())))
-			->andWhere($qb->expr()->eq('share_type', $qb->createNamedParameter(IShare::TYPE_EMAIL)))
-			->orderBy('id');
+			->andWhere($qb->expr()->eq('share_type', $qb->createNamedParameter(IShare::TYPE_EMAIL)));
 
 		$cursor = $qb->executeQuery();
 		while ($data = $cursor->fetch()) {
@@ -839,7 +838,9 @@ class ShareByMailProvider extends DefaultShareProvider implements IShareProvider
 		}
 
 		$qb->setFirstResult($offset);
-		$qb->orderBy('id');
+		if ($offset !== 0 || $limit !== -1) {
+			$qb->orderBy('id');
+		}
 
 		$cursor = $qb->executeQuery();
 		$shares = [];
@@ -914,8 +915,10 @@ class ShareByMailProvider extends DefaultShareProvider implements IShareProvider
 		$qb->select('*')
 			->from('share');
 
-		// Order by id
-		$qb->orderBy('id');
+		// Order by id only if we need it for limit/offset
+		if ($offset !== 0 || $limit !== -1) {
+			$qb->orderBy('id');
+		}
 
 		// Set limit and offset
 		if ($limit !== -1) {
@@ -1147,8 +1150,6 @@ class ShareByMailProvider extends DefaultShareProvider implements IShareProvider
 
 		$qb->andWhere($qb->expr()->eq('f.parent', $qb->createNamedParameter($node->getId())));
 
-		$qb->orderBy('id');
-
 		$cursor = $qb->executeQuery();
 		$shares = [];
 		while ($data = $cursor->fetch()) {