From: Matthias Schmidt <gravatronics@live.com>
Date: Sat, 7 May 2016 20:38:01 +0000 (+0200)
Subject: Add PreparedStatement::fetchColumns()
X-Git-Tag: 3.0.0_Beta_1~1749
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0e41dd997c049c3e087f59cb7af9f8ba97a6746a;p=GitHub%2FWoltLab%2FWCF.git

Add PreparedStatement::fetchColumns()
---

diff --git a/wcfsetup/install/files/lib/acp/action/UserQuickSearchAction.class.php b/wcfsetup/install/files/lib/acp/action/UserQuickSearchAction.class.php
index 5bed3552b7..effab7b639 100644
--- a/wcfsetup/install/files/lib/acp/action/UserQuickSearchAction.class.php
+++ b/wcfsetup/install/files/lib/acp/action/UserQuickSearchAction.class.php
@@ -97,9 +97,7 @@ class UserQuickSearchAction extends AbstractAction {
 					WHERE		banned = ?";
 				$statement = WCF::getDB()->prepareStatement($sql, $this->maxResults);
 				$statement->execute(array(1));
-				while ($row = $statement->fetchArray()) {
-					$this->matches[] = $row['userID'];
-				}
+				$this->matches = $statement->fetchColumns();
 				break;
 				
 			case 'newest':
@@ -113,9 +111,7 @@ class UserQuickSearchAction extends AbstractAction {
 					ORDER BY	user_table.registrationDate DESC";
 				$statement = WCF::getDB()->prepareStatement($sql, $this->maxResults);
 				$statement->execute();
-				while ($row = $statement->fetchArray()) {
-					$this->matches[] = $row['userID'];
-				}
+				$this->matches = $statement->fetchColumns();
 				break;
 			
 			case 'disabled':
@@ -129,9 +125,7 @@ class UserQuickSearchAction extends AbstractAction {
 					ORDER BY	user_table.registrationDate DESC";
 				$statement = WCF::getDB()->prepareStatement($sql, $this->maxResults);
 				$statement->execute(array(0));
-				while ($row = $statement->fetchArray()) {
-					$this->matches[] = $row['userID'];
-				}
+				$this->matches = $statement->fetchColumns();
 				break;
 			
 			case 'disabledAvatars':
@@ -142,9 +136,7 @@ class UserQuickSearchAction extends AbstractAction {
 					WHERE		disableAvatar = ?";
 				$statement = WCF::getDB()->prepareStatement($sql, $this->maxResults);
 				$statement->execute(array(1));
-				while ($row = $statement->fetchArray()) {
-					$this->matches[] = $row['userID'];
-				}
+				$this->matches = $statement->fetchColumns();
 				break;
 					
 			case 'disabledSignatures':
@@ -155,9 +147,7 @@ class UserQuickSearchAction extends AbstractAction {
 					WHERE		disableSignature = ?";
 				$statement = WCF::getDB()->prepareStatement($sql, $this->maxResults);
 				$statement->execute(array(1));
-				while ($row = $statement->fetchArray()) {
-					$this->matches[] = $row['userID'];
-				}
+				$this->matches = $statement->fetchColumns();
 				break;
 		}
 		
diff --git a/wcfsetup/install/files/lib/acp/form/BoxAddForm.class.php b/wcfsetup/install/files/lib/acp/form/BoxAddForm.class.php
index 7d3f6f57fb..f861b04d47 100644
--- a/wcfsetup/install/files/lib/acp/form/BoxAddForm.class.php
+++ b/wcfsetup/install/files/lib/acp/form/BoxAddForm.class.php
@@ -317,10 +317,7 @@ class BoxAddForm extends AbstractForm {
 				" . $conditionBuilder;
 			$statement = WCF::getDB()->prepareStatement($sql);
 			$statement->execute($conditionBuilder->getParameters());
-			$this->pageIDs = [];
-			while ($row = $statement->fetchArray()) {
-				$this->pageIDs[] = $row['pageID'];
-			}
+			$this->pageIDs = $statement->fetchColumns();
 		}
 		
 		// validate images
diff --git a/wcfsetup/install/files/lib/acp/form/MenuAddForm.class.php b/wcfsetup/install/files/lib/acp/form/MenuAddForm.class.php
index 68e9c3ad35..6c94b85c8d 100644
--- a/wcfsetup/install/files/lib/acp/form/MenuAddForm.class.php
+++ b/wcfsetup/install/files/lib/acp/form/MenuAddForm.class.php
@@ -132,10 +132,7 @@ class MenuAddForm extends AbstractForm {
 				" . $conditionBuilder;
 			$statement = WCF::getDB()->prepareStatement($sql);
 			$statement->execute($conditionBuilder->getParameters());
-			$this->pageIDs = [];
-			while ($row = $statement->fetchArray()) {
-				$this->pageIDs[] = $row['pageID'];
-			}
+			$this->pageIDs = $statement->fetchColumns();
 		}
 	}
 	
diff --git a/wcfsetup/install/files/lib/acp/form/StyleAddForm.class.php b/wcfsetup/install/files/lib/acp/form/StyleAddForm.class.php
index 437b5c3caa..ca1002f98d 100644
--- a/wcfsetup/install/files/lib/acp/form/StyleAddForm.class.php
+++ b/wcfsetup/install/files/lib/acp/form/StyleAddForm.class.php
@@ -336,10 +336,7 @@ class StyleAddForm extends AbstractForm {
 			FROM	wcf".WCF_N."_style_variable";
 		$statement = WCF::getDB()->prepareStatement($sql);
 		$statement->execute();
-		$variables = [];
-		while ($row = $statement->fetchArray()) {
-			$variables[] = $row['variableName'];
-		}
+		$variables = $statement->fetchColumns();
 		
 		$lines = explode("\n", StringUtil::unifyNewlines($this->variables['overrideScss']));
 		$regEx = new Regex('^@([a-zA-Z]+): ?([@a-zA-Z0-9 ,\.\(\)\%\#-]+);$');
diff --git a/wcfsetup/install/files/lib/acp/page/UserListPage.class.php b/wcfsetup/install/files/lib/acp/page/UserListPage.class.php
index ff52bf4830..2beb0b4f5a 100755
--- a/wcfsetup/install/files/lib/acp/page/UserListPage.class.php
+++ b/wcfsetup/install/files/lib/acp/page/UserListPage.class.php
@@ -233,7 +233,6 @@ class UserListPage extends SortablePage {
 	 */
 	protected function readUsers() {
 		// get user ids
-		$userIDs = [];
 		$sql = "SELECT		user_table.userID
 			FROM		wcf".WCF_N."_user user_table
 			".(isset($this->options[$this->sortField]) ? "LEFT JOIN wcf".WCF_N."_user_option_value user_option_value ON (user_option_value.userID = user_table.userID)" : '')."
@@ -241,9 +240,7 @@ class UserListPage extends SortablePage {
 			ORDER BY	".(($this->sortField != 'email' && isset($this->options[$this->sortField])) ? 'user_option_value.userOption'.$this->options[$this->sortField]->optionID : $this->sortField)." ".$this->sortOrder;
 		$statement = WCF::getDB()->prepareStatement($sql, $this->itemsPerPage, ($this->pageNo - 1) * $this->itemsPerPage);
 		$statement->execute($this->conditions->getParameters());
-		while ($row = $statement->fetchArray()) {
-			$userIDs[] = $row['userID'];
-		}
+		$userIDs = $statement->fetchColumns();
 		
 		// get user data
 		if (!empty($userIDs)) {
diff --git a/wcfsetup/install/files/lib/data/DatabaseObjectList.class.php b/wcfsetup/install/files/lib/data/DatabaseObjectList.class.php
index 104e343885..1bef8c9893 100644
--- a/wcfsetup/install/files/lib/data/DatabaseObjectList.class.php
+++ b/wcfsetup/install/files/lib/data/DatabaseObjectList.class.php
@@ -165,9 +165,7 @@ abstract class DatabaseObjectList implements \Countable, ITraversableObject {
 				".(!empty($this->sqlOrderBy) ? "ORDER BY ".$this->sqlOrderBy : '');
 		$statement = WCF::getDB()->prepareStatement($sql, $this->sqlLimit, $this->sqlOffset);
 		$statement->execute($this->getConditionBuilder()->getParameters());
-		while ($row = $statement->fetchArray()) {
-			$this->objectIDs[] = $row['objectID'];
-		}
+		$this->objectIDs = $statement->fetchColumns();
 	}
 	
 	/**
diff --git a/wcfsetup/install/files/lib/data/attachment/AttachmentAction.class.php b/wcfsetup/install/files/lib/data/attachment/AttachmentAction.class.php
index d3d4d67622..171e0713fc 100644
--- a/wcfsetup/install/files/lib/data/attachment/AttachmentAction.class.php
+++ b/wcfsetup/install/files/lib/data/attachment/AttachmentAction.class.php
@@ -245,7 +245,6 @@ class AttachmentAction extends AbstractDatabaseObjectAction implements ISortable
 		$this->parameters['attachmentIDs'] = ArrayUtil::toIntegerArray($this->parameters['attachmentIDs']);
 		
 		// check attachment ids
-		$attachmentIDs = [];
 		$conditions = new PreparedStatementConditionBuilder();
 		$conditions->add("attachmentID IN (?)", [$this->parameters['attachmentIDs']]);
 		$conditions->add("objectTypeID = ?", [$objectType->objectTypeID]);
@@ -262,9 +261,7 @@ class AttachmentAction extends AbstractDatabaseObjectAction implements ISortable
 			".$conditions;
 		$statement = WCF::getDB()->prepareStatement($sql);
 		$statement->execute($conditions->getParameters());
-		while ($row = $statement->fetchArray()) {
-			$attachmentIDs[] = $row['attachmentID'];
-		}
+		$attachmentIDs = $statement->fetchColumns();
 		
 		foreach ($this->parameters['attachmentIDs'] as $attachmentID) {
 			if (!in_array($attachmentID, $attachmentIDs)) {
diff --git a/wcfsetup/install/files/lib/data/bbcode/BBCodeAction.class.php b/wcfsetup/install/files/lib/data/bbcode/BBCodeAction.class.php
index 444214adfe..2ef4ed8e95 100644
--- a/wcfsetup/install/files/lib/data/bbcode/BBCodeAction.class.php
+++ b/wcfsetup/install/files/lib/data/bbcode/BBCodeAction.class.php
@@ -51,11 +51,7 @@ class BBCodeAction extends AbstractDatabaseObjectAction implements IToggleAction
 			WHERE	optionType = ?";
 		$statement = WCF::getDB()->prepareStatement($sql);
 		$statement->execute(array('BBCodeSelect'));
-		
-		$optionIDs = array();
-		while ($optionID = $statement->fetchColumn()) {
-			$optionIDs[] = $optionID;
-		}
+		$optionIDs = $statement->fetchColumns();
 		
 		if (!empty($optionIDs)) {
 			$conditionBuilder = new PreparedStatementConditionBuilder();
diff --git a/wcfsetup/install/files/lib/data/box/Box.class.php b/wcfsetup/install/files/lib/data/box/Box.class.php
index 15a5acac0d..3d3d6a56aa 100644
--- a/wcfsetup/install/files/lib/data/box/Box.class.php
+++ b/wcfsetup/install/files/lib/data/box/Box.class.php
@@ -454,15 +454,13 @@ class Box extends DatabaseObject {
 	 */
 	public function getPageIDs() {
 		if ($this->pageIDs === null) {
-			$this->pageIDs = [];
 			$sql = "SELECT  pageID
 				FROM    wcf" . WCF_N . "_box_to_page
 				WHERE   boxID = ?";
 			$statement = WCF::getDB()->prepareStatement($sql);
 			$statement->execute([$this->boxID]);
-			while ($pageID = $statement->fetchColumn()) {
-				$this->pageIDs[] = $pageID;
-			}
+			
+			$this->pageIDs = $statement->fetchColumns();
 		}
 		
 		return $this->pageIDs;
diff --git a/wcfsetup/install/files/lib/data/comment/CommentEditor.class.php b/wcfsetup/install/files/lib/data/comment/CommentEditor.class.php
index 2a581f8f7e..1903c579c9 100644
--- a/wcfsetup/install/files/lib/data/comment/CommentEditor.class.php
+++ b/wcfsetup/install/files/lib/data/comment/CommentEditor.class.php
@@ -29,10 +29,7 @@ class CommentEditor extends DatabaseObjectEditor {
 			ORDER BY	time ASC, responseID ASC";
 		$statement = WCF::getDB()->prepareStatement($sql, 5);
 		$statement->execute(array($this->commentID));
-		$responseIDs = array();
-		while ($row = $statement->fetchArray()) {
-			$responseIDs[] = $row['responseID'];
-		}
+		$responseIDs = $statement->fetchColumns();
 		
 		$this->update(array(
 			'responseIDs' => serialize($responseIDs)
diff --git a/wcfsetup/install/files/lib/data/label/LabelAction.class.php b/wcfsetup/install/files/lib/data/label/LabelAction.class.php
index 4908c4222a..b3a90c19dc 100644
--- a/wcfsetup/install/files/lib/data/label/LabelAction.class.php
+++ b/wcfsetup/install/files/lib/data/label/LabelAction.class.php
@@ -100,10 +100,7 @@ class LabelAction extends AbstractDatabaseObjectAction implements ISortableActio
 					".$conditions;
 				$statement = WCF::getDB()->prepareStatement($sql);
 				$statement->execute($conditions->getParameters());
-				$languageItemIDs = [];
-				while ($row = $statement->fetchArray()) {
-					$languageItemIDs[] = $row['languageItemID'];
-				}
+				$languageItemIDs = $statement->fetchColumns();
 				
 				$objectAction = new LanguageItemAction($languageItemIDs, 'delete');
 				$objectAction->executeAction();
diff --git a/wcfsetup/install/files/lib/data/moderation/queue/ModerationQueueAction.class.php b/wcfsetup/install/files/lib/data/moderation/queue/ModerationQueueAction.class.php
index 941fc79f16..43072696d6 100644
--- a/wcfsetup/install/files/lib/data/moderation/queue/ModerationQueueAction.class.php
+++ b/wcfsetup/install/files/lib/data/moderation/queue/ModerationQueueAction.class.php
@@ -120,10 +120,7 @@ class ModerationQueueAction extends AbstractDatabaseObjectAction {
 			ORDER BY	moderation_queue.lastChangeTime DESC";
 		$statement = WCF::getDB()->prepareStatement($sql, 5);
 		$statement->execute($conditions->getParameters());
-		$queueIDs = array();
-		while ($row = $statement->fetchArray()) {
-			$queueIDs[] = $row['queueID'];
-		}
+		$queueIDs = $statement->fetchColumns();
 		
 		$queues = array();
 		if (!empty($queueIDs)) {
diff --git a/wcfsetup/install/files/lib/data/page/Page.class.php b/wcfsetup/install/files/lib/data/page/Page.class.php
index 42d7373003..b40033b1cf 100644
--- a/wcfsetup/install/files/lib/data/page/Page.class.php
+++ b/wcfsetup/install/files/lib/data/page/Page.class.php
@@ -270,15 +270,12 @@ class Page extends DatabaseObject implements ILinkableObject, ITitledObject {
 	 */
 	public function getBoxIDs() {
 		if ($this->boxIDs === null) {
-			$this->boxIDs = [];
 			$sql = "SELECT  boxID
 				FROM    wcf" . WCF_N . "_box_to_page
 				WHERE   pageID = ?";
 			$statement = WCF::getDB()->prepareStatement($sql);
 			$statement->execute([$this->pageID]);
-			while ($row = $statement->fetchArray()) {
-				$this->boxIDs[] = $row['boxID'];
-			}
+			$this->boxIDs = $statement->fetchColumns();
 		}
 		
 		return $this->boxIDs;
diff --git a/wcfsetup/install/files/lib/data/style/StyleEditor.class.php b/wcfsetup/install/files/lib/data/style/StyleEditor.class.php
index 6c0a623745..7d541668cb 100644
--- a/wcfsetup/install/files/lib/data/style/StyleEditor.class.php
+++ b/wcfsetup/install/files/lib/data/style/StyleEditor.class.php
@@ -420,9 +420,7 @@ class StyleEditor extends DatabaseObjectEditor implements IEditableCachedObject
 						WHERE	templateGroupID = ?";
 					$statement = WCF::getDB()->prepareStatement($sql);
 					$statement->execute([$style->templateGroupID]);
-					while ($row = $statement->fetchArray()) {
-						$knownTemplates[] = $row['templateName'];
-					}
+					$knownTemplates = $statement->fetchColumns();
 				}
 				
 				// copy templates
diff --git a/wcfsetup/install/files/lib/data/user/TeamList.class.php b/wcfsetup/install/files/lib/data/user/TeamList.class.php
index 0b89b4d684..6836c7bbd4 100644
--- a/wcfsetup/install/files/lib/data/user/TeamList.class.php
+++ b/wcfsetup/install/files/lib/data/user/TeamList.class.php
@@ -51,9 +51,7 @@ class TeamList extends UserProfileList {
 			ORDER BY	user_group.priority DESC".(!empty($this->sqlOrderBy) ? ", ".$this->sqlOrderBy : '');
 		$statement = WCF::getDB()->prepareStatement($sql, $this->sqlLimit, $this->sqlOffset);
 		$statement->execute();
-		while ($row = $statement->fetchArray()) {
-			$this->objectIDs[] = $row['objectID'];
-		}
+		$this->objectIDs = $statement->fetchColumns();
 	}
 	
 	/**
diff --git a/wcfsetup/install/files/lib/data/user/User.class.php b/wcfsetup/install/files/lib/data/user/User.class.php
index 93519df6a1..c9fb307322 100644
--- a/wcfsetup/install/files/lib/data/user/User.class.php
+++ b/wcfsetup/install/files/lib/data/user/User.class.php
@@ -203,15 +203,12 @@ final class User extends DatabaseObject implements IRouteController, IUserConten
 				
 				// cache does not exist or is outdated
 				if ($data === null || $skipCache) {
-					$this->groupIDs = [];
 					$sql = "SELECT	groupID
 						FROM	wcf".WCF_N."_user_to_group
 						WHERE	userID = ?";
 					$statement = WCF::getDB()->prepareStatement($sql);
 					$statement->execute([$this->userID]);
-					while ($row = $statement->fetchArray()) {
-						$this->groupIDs[] = $row['groupID'];
-					}
+					$this->groupIDs = $statement->fetchColumns();
 					
 					// update storage data
 					if (!$skipCache) {
@@ -249,9 +246,7 @@ final class User extends DatabaseObject implements IRouteController, IUserConten
 						WHERE	userID = ?";
 					$statement = WCF::getDB()->prepareStatement($sql);
 					$statement->execute([$this->userID]);
-					while ($row = $statement->fetchArray()) {
-						$this->languageIDs[] = $row['languageID'];
-					}
+					$this->languageIDs = $statement->fetchColumns();
 					
 					// update storage data
 					UserStorageHandler::getInstance()->update($this->userID, 'languageIDs', serialize($this->languageIDs));
diff --git a/wcfsetup/install/files/lib/data/user/UserAction.class.php b/wcfsetup/install/files/lib/data/user/UserAction.class.php
index 5d237cf103..251c8127ea 100644
--- a/wcfsetup/install/files/lib/data/user/UserAction.class.php
+++ b/wcfsetup/install/files/lib/data/user/UserAction.class.php
@@ -95,11 +95,7 @@ class UserAction extends AbstractDatabaseObjectAction implements IClipboardActio
 			".$conditions;
 		$statement = WCF::getDB()->prepareStatement($sql);
 		$statement->execute($conditions->getParameters());
-		
-		$groupIDs = [];
-		while ($row = $statement->fetchArray()) {
-			$groupIDs[] = $row['groupID'];
-		}
+		$groupIDs = $statement->fetchColumns();
 		
 		if (!UserGroup::isAccessibleGroup($groupIDs)) {
 			throw new PermissionDeniedException();
diff --git a/wcfsetup/install/files/lib/data/user/UserProfile.class.php b/wcfsetup/install/files/lib/data/user/UserProfile.class.php
index 9b7418de4d..934dbac131 100644
--- a/wcfsetup/install/files/lib/data/user/UserProfile.class.php
+++ b/wcfsetup/install/files/lib/data/user/UserProfile.class.php
@@ -168,9 +168,7 @@ class UserProfile extends DatabaseObjectDecorator implements ITitledLinkObject {
 						WHERE	userID = ?";
 					$statement = WCF::getDB()->prepareStatement($sql);
 					$statement->execute([$this->userID]);
-					while ($row = $statement->fetchArray()) {
-						$this->followingUserIDs[] = $row['followUserID'];
-					}
+					$this->followingUserIDs = $statement->fetchColumns();
 					
 					// update storage data
 					UserStorageHandler::getInstance()->update($this->userID, 'followingUserIDs', serialize($this->followingUserIDs));
@@ -204,9 +202,7 @@ class UserProfile extends DatabaseObjectDecorator implements ITitledLinkObject {
 						WHERE	followUserID = ?";
 					$statement = WCF::getDB()->prepareStatement($sql);
 					$statement->execute([$this->userID]);
-					while ($row = $statement->fetchArray()) {
-						$this->followerUserIDs[] = $row['userID'];
-					}
+					$this->followerUserIDs = $statement->fetchColumns();
 					
 					// update storage data
 					UserStorageHandler::getInstance()->update($this->userID, 'followerUserIDs', serialize($this->followerUserIDs));
@@ -240,9 +236,7 @@ class UserProfile extends DatabaseObjectDecorator implements ITitledLinkObject {
 						WHERE	userID = ?";
 					$statement = WCF::getDB()->prepareStatement($sql);
 					$statement->execute([$this->userID]);
-					while ($row = $statement->fetchArray()) {
-						$this->ignoredUserIDs[] = $row['ignoreUserID'];
-					}
+					$this->ignoredUserIDs = $statement->fetchColumns();
 					
 					// update storage data
 					UserStorageHandler::getInstance()->update($this->userID, 'ignoredUserIDs', serialize($this->ignoredUserIDs));
diff --git a/wcfsetup/install/files/lib/data/user/follow/UserFollowAction.class.php b/wcfsetup/install/files/lib/data/user/follow/UserFollowAction.class.php
index 389b6347a9..38a9b0f14a 100644
--- a/wcfsetup/install/files/lib/data/user/follow/UserFollowAction.class.php
+++ b/wcfsetup/install/files/lib/data/user/follow/UserFollowAction.class.php
@@ -198,10 +198,7 @@ class UserFollowAction extends AbstractDatabaseObjectAction implements IGroupedU
 			WHERE	followUserID = ?";
 		$statement = WCF::getDB()->prepareStatement($sql, 20, ($this->parameters['pageNo'] - 1) * 20);
 		$statement->execute(array($this->parameters['userID']));
-		$userIDs = array();
-		while ($row = $statement->fetchArray()) {
-			$userIDs[] = $row['userID'];
-		}
+		$userIDs = $statement->fetchColumns();
 		
 		// create group
 		$group = new GroupedUserList();
diff --git a/wcfsetup/install/files/lib/data/user/follow/UserFollowingAction.class.php b/wcfsetup/install/files/lib/data/user/follow/UserFollowingAction.class.php
index 79c4726578..46f79b55ee 100644
--- a/wcfsetup/install/files/lib/data/user/follow/UserFollowingAction.class.php
+++ b/wcfsetup/install/files/lib/data/user/follow/UserFollowingAction.class.php
@@ -52,10 +52,7 @@ class UserFollowingAction extends UserFollowAction {
 			WHERE	userID = ?";
 		$statement = WCF::getDB()->prepareStatement($sql, 20, ($this->parameters['pageNo'] - 1) * 20);
 		$statement->execute(array($this->parameters['userID']));
-		$userIDs = array();
-		while ($row = $statement->fetchArray()) {
-			$userIDs[] = $row['followUserID'];
-		}
+		$userIDs = $statement->fetchColumns();
 		
 		// create group
 		$group = new GroupedUserList();
diff --git a/wcfsetup/install/files/lib/data/user/profile/visitor/UserProfileVisitorAction.class.php b/wcfsetup/install/files/lib/data/user/profile/visitor/UserProfileVisitorAction.class.php
index df6e3a76a0..c5ed9b5d09 100644
--- a/wcfsetup/install/files/lib/data/user/profile/visitor/UserProfileVisitorAction.class.php
+++ b/wcfsetup/install/files/lib/data/user/profile/visitor/UserProfileVisitorAction.class.php
@@ -62,10 +62,7 @@ class UserProfileVisitorAction extends AbstractDatabaseObjectAction implements I
 			ORDER BY	time DESC";
 		$statement = WCF::getDB()->prepareStatement($sql, 20, ($this->parameters['pageNo'] - 1) * 20);
 		$statement->execute(array($this->parameters['userID']));
-		$userIDs = array();
-		while ($row = $statement->fetchArray()) {
-			$userIDs[] = $row['userID'];
-		}
+		$userIDs = $statement->fetchColumns();
 		
 		// create group
 		$group = new GroupedUserList();
diff --git a/wcfsetup/install/files/lib/form/SearchForm.class.php b/wcfsetup/install/files/lib/form/SearchForm.class.php
index 6bb83176e2..4531812256 100644
--- a/wcfsetup/install/files/lib/form/SearchForm.class.php
+++ b/wcfsetup/install/files/lib/form/SearchForm.class.php
@@ -495,9 +495,7 @@ class SearchForm extends AbstractCaptchaForm {
 				WHERE	username ".($this->nameExactly ? "= ?" : "LIKE ?");
 			$statement = WCF::getDB()->prepareStatement($sql, 100);
 			$statement->execute(array($this->username.(!$this->nameExactly ? '%' : '')));
-			while ($row = $statement->fetchArray()) {
-				$userIDs[] = $row['userID'];
-			}
+			$userIDs = $statement->fetchColumns();
 			
 			if (empty($userIDs)) {
 				$this->throwNoMatchesException();
diff --git a/wcfsetup/install/files/lib/form/UserSearchForm.class.php b/wcfsetup/install/files/lib/form/UserSearchForm.class.php
index 0eecfc025b..04d6e7bf6b 100644
--- a/wcfsetup/install/files/lib/form/UserSearchForm.class.php
+++ b/wcfsetup/install/files/lib/form/UserSearchForm.class.php
@@ -175,9 +175,7 @@ class UserSearchForm extends UserOptionListForm {
 		// do search
 		$statement = WCF::getDB()->prepareStatement($sql.$this->conditions, $this->maxResults);
 		$statement->execute($this->conditions->getParameters());
-		while ($row = $statement->fetchArray()) {
-			$this->matches[] = $row['userID'];
-		}
+		$this->matches = $statement->fetchColumns();
 	}
 	
 	/**
diff --git a/wcfsetup/install/files/lib/system/cronjob/AttachmentCleanUpCronjob.class.php b/wcfsetup/install/files/lib/system/cronjob/AttachmentCleanUpCronjob.class.php
index 5215fe646a..f7979d8fec 100644
--- a/wcfsetup/install/files/lib/system/cronjob/AttachmentCleanUpCronjob.class.php
+++ b/wcfsetup/install/files/lib/system/cronjob/AttachmentCleanUpCronjob.class.php
@@ -22,7 +22,6 @@ class AttachmentCleanUpCronjob extends AbstractCronjob {
 		parent::execute($cronjob);
 		
 		// delete orphaned attachments
-		$attachmentIDs = array();
 		$sql = "SELECT	attachmentID
 			FROM	wcf".WCF_N."_attachment
 			WHERE	objectID = ?
@@ -32,9 +31,7 @@ class AttachmentCleanUpCronjob extends AbstractCronjob {
 			0,
 			(TIME_NOW - 86400)
 		));
-		while ($row = $statement->fetchArray()) {
-			$attachmentIDs[] = $row['attachmentID'];
-		}
+		$attachmentIDs = $statement->fetchColumns();
 		
 		if (!empty($attachmentIDs)) {
 			AttachmentEditor::deleteAll($attachmentIDs);
diff --git a/wcfsetup/install/files/lib/system/cronjob/DailyMailNotificationCronjob.class.php b/wcfsetup/install/files/lib/system/cronjob/DailyMailNotificationCronjob.class.php
index 8193471d02..dc1fe3cd3c 100644
--- a/wcfsetup/install/files/lib/system/cronjob/DailyMailNotificationCronjob.class.php
+++ b/wcfsetup/install/files/lib/system/cronjob/DailyMailNotificationCronjob.class.php
@@ -32,7 +32,6 @@ class DailyMailNotificationCronjob extends AbstractCronjob {
 		parent::execute($cronjob);
 		
 		// get user ids
-		$userIDs = array();
 		$sql = "SELECT	DISTINCT userID
 			FROM	wcf".WCF_N."_user_notification
 			WHERE	mailNotified = ?
@@ -44,9 +43,7 @@ class DailyMailNotificationCronjob extends AbstractCronjob {
 			TIME_NOW - 3600 * 23,
 			0
 		));
-		while ($row = $statement->fetchArray()) {
-			$userIDs[] = $row['userID'];
-		}
+		$userIDs = $statement->fetchColumns();
 		if (empty($userIDs)) return;
 		
 		// get users
diff --git a/wcfsetup/install/files/lib/system/cronjob/ModerationQueueCronjob.class.php b/wcfsetup/install/files/lib/system/cronjob/ModerationQueueCronjob.class.php
index 5e8c04eae7..4171428aa6 100644
--- a/wcfsetup/install/files/lib/system/cronjob/ModerationQueueCronjob.class.php
+++ b/wcfsetup/install/files/lib/system/cronjob/ModerationQueueCronjob.class.php
@@ -32,10 +32,7 @@ class ModerationQueueCronjob extends AbstractCronjob {
 			ModerationQueue::STATUS_DONE,
 			(TIME_NOW - (86400 * 30))
 		));
-		$queueIDs = array();
-		while ($row = $statement->fetchArray()) {
-			$queueIDs[] = $row['queueID'];
-		}
+		$queueIDs = $statement->fetchColumns();
 		
 		if (!empty($queueIDs)) {
 			$conditions = new PreparedStatementConditionBuilder();
diff --git a/wcfsetup/install/files/lib/system/cronjob/UserQuitCronjob.class.php b/wcfsetup/install/files/lib/system/cronjob/UserQuitCronjob.class.php
index 445e983314..f65050eab2 100644
--- a/wcfsetup/install/files/lib/system/cronjob/UserQuitCronjob.class.php
+++ b/wcfsetup/install/files/lib/system/cronjob/UserQuitCronjob.class.php
@@ -21,7 +21,6 @@ class UserQuitCronjob extends AbstractCronjob {
 	public function execute(Cronjob $cronjob) {
 		parent::execute($cronjob);
 		
-		$userIDs = array();
 		$sql = "SELECT	userID
 			FROM	wcf".WCF_N."_user
 			WHERE	quitStarted > ?
@@ -31,9 +30,7 @@ class UserQuitCronjob extends AbstractCronjob {
 			0,
 			(TIME_NOW - 7 * 24 * 3600)
 		));
-		while ($row = $statement->fetchArray()) {
-			$userIDs[] = $row['userID'];
-		}
+		$userIDs = $statement->fetchColumns();
 		
 		if (!empty($userIDs)) {
 			$action = new UserAction($userIDs, 'delete');
diff --git a/wcfsetup/install/files/lib/system/database/statement/PreparedStatement.class.php b/wcfsetup/install/files/lib/system/database/statement/PreparedStatement.class.php
index 9be0d7ce3e..7d39de6c8a 100644
--- a/wcfsetup/install/files/lib/system/database/statement/PreparedStatement.class.php
+++ b/wcfsetup/install/files/lib/system/database/statement/PreparedStatement.class.php
@@ -159,6 +159,21 @@ class PreparedStatement {
 		return $column;
 	}
 	
+	/**
+	 * Returns a specific column for all of the remaining rows.
+	 * 
+	 * @param	integer		$columnNumber
+	 * @return	array
+	 */
+	public function fetchColumns($columnNumber = 0) {
+		$columns = [];
+		while ($column = $this->fetchColumn($columnNumber)) {
+			$columns[] = $column;
+		}
+		
+		return $columns;
+	}
+	
 	/**
 	 * Fetches the next row from a result set in a database object.
 	 * 
diff --git a/wcfsetup/install/files/lib/system/edit/EditHistoryManager.class.php b/wcfsetup/install/files/lib/system/edit/EditHistoryManager.class.php
index 8aa0f280c5..92de7cc17c 100644
--- a/wcfsetup/install/files/lib/system/edit/EditHistoryManager.class.php
+++ b/wcfsetup/install/files/lib/system/edit/EditHistoryManager.class.php
@@ -133,10 +133,7 @@ class EditHistoryManager extends SingletonFactory {
 			$userIDs
 		));
 		
-		$entryIDs = array();
-		while ($entryID = $statement->fetchColumn()) {
-			$entryIDs[] = $entryID;
-		}
+		$entryIDs = $statement->fetchColumns();
 		if (empty($entryIDs)) return;
 		
 		$list = new EditHistoryEntryList();
diff --git a/wcfsetup/install/files/lib/system/importer/AbstractCommentResponseImporter.class.php b/wcfsetup/install/files/lib/system/importer/AbstractCommentResponseImporter.class.php
index 86ae1a002f..bcb05ec292 100644
--- a/wcfsetup/install/files/lib/system/importer/AbstractCommentResponseImporter.class.php
+++ b/wcfsetup/install/files/lib/system/importer/AbstractCommentResponseImporter.class.php
@@ -42,8 +42,7 @@ class AbstractCommentResponseImporter extends AbstractImporter {
 			ORDER BY	time ASC, responseID ASC";
 		$statement = WCF::getDB()->prepareStatement($sql, 5);
 		$statement->execute(array($response->commentID));
-		$responseIDs = array();
-		while ($responseID = $statement->fetchColumn()) $responseIDs[] = $responseID;
+		$responseIDs = $statement->fetchColumns();
 		
 		// update parent comment
 		$sql = "UPDATE	wcf".WCF_N."_comment
diff --git a/wcfsetup/install/files/lib/system/importer/UserImporter.class.php b/wcfsetup/install/files/lib/system/importer/UserImporter.class.php
index 123dbe7875..7b91f835de 100644
--- a/wcfsetup/install/files/lib/system/importer/UserImporter.class.php
+++ b/wcfsetup/install/files/lib/system/importer/UserImporter.class.php
@@ -49,9 +49,7 @@ class UserImporter extends AbstractImporter {
 			WHERE	preset = ?";
 		$statement = WCF::getDB()->prepareStatement($sql);
 		$statement->execute(array(1));
-		while ($row = $statement->fetchArray()) {
-			$this->eventIDs[] = $row['eventID'];
-		}
+		$this->eventIDs = $statement->fetchColumns();
 		
 		$userOptionList = new UserOptionList();
 		$userOptionList->readObjects();
diff --git a/wcfsetup/install/files/lib/system/moderation/queue/AbstractModerationQueueHandler.class.php b/wcfsetup/install/files/lib/system/moderation/queue/AbstractModerationQueueHandler.class.php
index 09d756aabb..be94ea0474 100644
--- a/wcfsetup/install/files/lib/system/moderation/queue/AbstractModerationQueueHandler.class.php
+++ b/wcfsetup/install/files/lib/system/moderation/queue/AbstractModerationQueueHandler.class.php
@@ -89,10 +89,7 @@ abstract class AbstractModerationQueueHandler implements IModerationQueueHandler
 			".$conditions;
 		$statement = WCF::getDB()->prepareStatement($sql);
 		$statement->execute($conditions->getParameters());
-		$queueIDs = array();
-		while ($row = $statement->fetchArray()) {
-			$queueIDs[] = $row['queueID'];
-		}
+		$queueIDs = $statement->fetchColumns();
 		
 		if (!empty($queueIDs)) {
 			$queueAction = new ModerationQueueAction($queueIDs, 'delete');
diff --git a/wcfsetup/install/files/lib/system/package/PackageInstallationScheduler.class.php b/wcfsetup/install/files/lib/system/package/PackageInstallationScheduler.class.php
index 52649bcb92..d66ebbabbe 100644
--- a/wcfsetup/install/files/lib/system/package/PackageInstallationScheduler.class.php
+++ b/wcfsetup/install/files/lib/system/package/PackageInstallationScheduler.class.php
@@ -464,7 +464,6 @@ class PackageInstallationScheduler {
 		
 		// get highest version of the required major release
 		if (preg_match('/(\d+\.\d+\.)/', $version, $match)) {
-			$packageVersions = array();
 			$sql = "SELECT	DISTINCT packageVersion
 				FROM	wcf".WCF_N."_package_update_version
 				WHERE	packageUpdateID IN (
@@ -478,9 +477,7 @@ class PackageInstallationScheduler {
 				$package->package,
 				$match[1].'%'
 			));
-			while ($row = $statement->fetchArray()) {
-				$packageVersions[] = $row['packageVersion'];
-			}
+			$packageVersions = $statement->fetchColumns();
 			
 			if (count($packageVersions) > 1) {
 				// sort by version number
diff --git a/wcfsetup/install/files/lib/system/package/plugin/BoxPackageInstallationPlugin.class.php b/wcfsetup/install/files/lib/system/package/plugin/BoxPackageInstallationPlugin.class.php
index b7a0edd627..efc2f2bc69 100644
--- a/wcfsetup/install/files/lib/system/package/plugin/BoxPackageInstallationPlugin.class.php
+++ b/wcfsetup/install/files/lib/system/package/plugin/BoxPackageInstallationPlugin.class.php
@@ -345,10 +345,7 @@ class BoxPackageInstallationPlugin extends AbstractXMLPackageInstallationPlugin
 				".$conditionBuilder;
 			$statement = WCF::getDB()->prepareStatement($sql);
 			$statement->execute($conditionBuilder->getParameters());
-			$pageIDs = [];
-			while ($pageID = $statement->fetchColumn()) {
-				$pageIDs[] = $pageID;
-			}
+			$pageIDs = $statement->fetchColumns();
 			
 			// save page ids
 			foreach ($pageIDs as $pageID) {
diff --git a/wcfsetup/install/files/lib/system/package/plugin/MenuPackageInstallationPlugin.class.php b/wcfsetup/install/files/lib/system/package/plugin/MenuPackageInstallationPlugin.class.php
index 82cec96692..0ae8e847c0 100644
--- a/wcfsetup/install/files/lib/system/package/plugin/MenuPackageInstallationPlugin.class.php
+++ b/wcfsetup/install/files/lib/system/package/plugin/MenuPackageInstallationPlugin.class.php
@@ -258,10 +258,7 @@ class MenuPackageInstallationPlugin extends AbstractXMLPackageInstallationPlugin
 					" . $conditionBuilder;
 				$statement = WCF::getDB()->prepareStatement($sql);
 				$statement->execute($conditionBuilder->getParameters());
-				$pageIDs = [];
-				while ($row = $statement->fetchArray()) {
-					$pageIDs[] = $row['pageID'];
-				}
+				$pageIDs = $statement->fetchColumns();
 				
 				// save page ids
 				foreach ($pageIDs as $pageID) {
diff --git a/wcfsetup/install/files/lib/system/session/SessionHandler.class.php b/wcfsetup/install/files/lib/system/session/SessionHandler.class.php
index 62a713c4c2..0e390a8796 100644
--- a/wcfsetup/install/files/lib/system/session/SessionHandler.class.php
+++ b/wcfsetup/install/files/lib/system/session/SessionHandler.class.php
@@ -623,15 +623,12 @@ class SessionHandler extends SingletonFactory {
 		
 		// work-around for setup process (package wcf does not exist yet)
 		if (!PACKAGE_ID) {
-			$groupIDs = array();
 			$sql = "SELECT	groupID
 				FROM	wcf".WCF_N."_user_to_group
 				WHERE	userID = ?";
 			$statement = WCF::getDB()->prepareStatement($sql);
 			$statement->execute(array($this->user->userID));
-			while ($row = $statement->fetchArray()) {
-				$groupIDs[] = $row['groupID'];
-			}
+			$groupIDs = $statement->fetchColumns();
 		}
 		else {
 			$groupIDs = $this->user->getGroupIDs();
@@ -674,9 +671,7 @@ class SessionHandler extends SingletonFactory {
 				WHERE	userID = ?";
 			$statement = WCF::getDB()->prepareStatement($sql);
 			$statement->execute(array($this->user->userID));
-			while ($row = $statement->fetchArray()) {
-				$this->languageIDs[] = $row['languageID'];
-			}
+			$this->languageIDs = $statement->fetchColumns();
 		}
 		else {
 			$this->languageIDs = $this->user->getLanguageIDs();
diff --git a/wcfsetup/install/files/lib/system/user/collapsible/content/UserCollapsibleContentHandler.class.php b/wcfsetup/install/files/lib/system/user/collapsible/content/UserCollapsibleContentHandler.class.php
index ca55460324..f5f28a51cc 100644
--- a/wcfsetup/install/files/lib/system/user/collapsible/content/UserCollapsibleContentHandler.class.php
+++ b/wcfsetup/install/files/lib/system/user/collapsible/content/UserCollapsibleContentHandler.class.php
@@ -102,9 +102,7 @@ class UserCollapsibleContentHandler extends SingletonFactory {
 						$objectTypeID,
 						WCF::getUser()->userID
 					));
-					while ($row = $statement->fetchArray()) {
-						$this->collapsedContent[$objectTypeID][] = $row['objectID'];
-					}
+					$this->collapsedContent[$objectTypeID] = $statement->fetchColumns();
 					
 					// update storage data
 					UserStorageHandler::getInstance()->update(WCF::getUser()->userID, 'collapsedContent-'.$objectTypeID, serialize($this->collapsedContent[$objectTypeID]));
diff --git a/wcfsetup/install/files/lib/system/user/notification/UserNotificationHandler.class.php b/wcfsetup/install/files/lib/system/user/notification/UserNotificationHandler.class.php
index 4729c6fa48..15404ef42b 100644
--- a/wcfsetup/install/files/lib/system/user/notification/UserNotificationHandler.class.php
+++ b/wcfsetup/install/files/lib/system/user/notification/UserNotificationHandler.class.php
@@ -156,10 +156,7 @@ class UserNotificationHandler extends SingletonFactory {
 				".$conditions;
 			$statement = WCF::getDB()->prepareStatement($sql);
 			$statement->execute($conditions->getParameters());
-			$notificationIDs = array();
-			while ($row = $statement->fetchArray()) {
-				$notificationIDs[] = $row['notificationID'];
-			}
+			$notificationIDs = $statement->fetchColumns();
 			
 			// filter array of existing notifications and remove values which
 			// do not have a notification from this author yet (inverse logic!)
@@ -709,11 +706,7 @@ class UserNotificationHandler extends SingletonFactory {
 		$statement->execute(array(
 			$objectTypeObj->objectTypeID
 		));
-		
-		$eventIDs = array();
-		while ($row = $statement->fetchArray()) {
-			$eventIDs[] = $row['eventID'];
-		}
+		$eventIDs = $statement->fetchColumns();
 		
 		if (!empty($eventIDs)) {
 			$conditions = new PreparedStatementConditionBuilder();
@@ -725,11 +718,7 @@ class UserNotificationHandler extends SingletonFactory {
 				".$conditions;
 			$statement = WCF::getDB()->prepareStatement($sql);
 			$statement->execute($conditions->getParameters());
-			
-			$userIDs = array();
-			while ($userID = $statement->fetchColumn()) {
-				$userIDs[] = $userID;
-			}
+			$userIDs = $statement->fetchColumns();
 			
 			// reset number of notifications
 			if (!empty($userIDs)) {
diff --git a/wcfsetup/install/files/lib/system/user/notification/object/type/TMultiRecipientModerationQueueCommentUserNotificationObjectType.class.php b/wcfsetup/install/files/lib/system/user/notification/object/type/TMultiRecipientModerationQueueCommentUserNotificationObjectType.class.php
index 884dc21266..2869de50b1 100644
--- a/wcfsetup/install/files/lib/system/user/notification/object/type/TMultiRecipientModerationQueueCommentUserNotificationObjectType.class.php
+++ b/wcfsetup/install/files/lib/system/user/notification/object/type/TMultiRecipientModerationQueueCommentUserNotificationObjectType.class.php
@@ -30,8 +30,6 @@ trait TMultiRecipientModerationQueueCommentUserNotificationObjectType {
 			return [];
 		}
 		
-		$recipientIDs = [];
-		
 		// 1. fetch assigned user
 		// 2. fetch users who commented on the moderation queue entry
 		// 3. fetch users who responded to a comment on the moderation queue entry
@@ -65,9 +63,7 @@ trait TMultiRecipientModerationQueueCommentUserNotificationObjectType {
 			$comment->objectID,
 			$objectTypeID
 		]);
-		while ($userID = $statement->fetchColumn()) {
-			$recipientIDs[] = $userID;
-		}
+		$recipientIDs = $statement->fetchColumns();
 		
 		// make sure that all users can (still) access the moderation queue entry
 		if (!empty($recipientIDs)) {
@@ -80,11 +76,7 @@ trait TMultiRecipientModerationQueueCommentUserNotificationObjectType {
 				".$conditionBuilder;
 			$statement = WCF::getDB()->prepareStatement($sql);
 			$statement->execute($conditionBuilder->getParameters());
-			
-			$recipientIDs = [];
-			while ($userID = $statement->fetchColumn()) {
-				$recipientIDs[] = $userID;
-			}
+			$recipientIDs = $statement->fetchColumns();
 			
 			// make sure that all users (still) have permission to access moderation
 			if (!$recipientIDs) {
diff --git a/wcfsetup/install/files/lib/system/user/object/watch/UserObjectWatchHandler.class.php b/wcfsetup/install/files/lib/system/user/object/watch/UserObjectWatchHandler.class.php
index 4a3973b712..23b2ccfddb 100644
--- a/wcfsetup/install/files/lib/system/user/object/watch/UserObjectWatchHandler.class.php
+++ b/wcfsetup/install/files/lib/system/user/object/watch/UserObjectWatchHandler.class.php
@@ -53,7 +53,6 @@ class UserObjectWatchHandler extends SingletonFactory {
 		$objectTypeObj = ObjectTypeCache::getInstance()->getObjectTypeByName('com.woltlab.wcf.user.objectWatch', $objectType);
 		
 		// get subscriber
-		$userIDs = array();
 		$conditionsBuilder = new PreparedStatementConditionBuilder();
 		$conditionsBuilder->add('objectTypeID = ?', array($objectTypeObj->objectTypeID));
 		$conditionsBuilder->add('objectID IN (?)', array($objectIDs));
@@ -62,9 +61,7 @@ class UserObjectWatchHandler extends SingletonFactory {
 			".$conditionsBuilder;
 		$statement = WCF::getDB()->prepareStatement($sql);
 		$statement->execute($conditionsBuilder->getParameters());
-		while ($row = $statement->fetchArray()) {
-			$userIDs[] = $row['userID'];
-		}
+		$userIDs = $statement->fetchColumns();
 		
 		if (!empty($userIDs)) {
 			// reset user storage