diff --git a/core/modules/aggregator/aggregator.admin.inc b/core/modules/aggregator/aggregator.admin.inc
index 93319bfe797acbb68d8d78aeac6c2f8aaf6dbb84..2837cc1996a96e837a9ec08d7df33f67fa61d31e 100644
--- a/core/modules/aggregator/aggregator.admin.inc
+++ b/core/modules/aggregator/aggregator.admin.inc
@@ -84,7 +84,7 @@ function aggregator_form_feed($form, &$form_state, stdClass $feed = NULL) {
   $form['url'] = array('#type' => 'textfield',
     '#title' => t('URL'),
     '#default_value' => isset($feed->url) ? $feed->url : '',
-    '#maxlength' => 255,
+    '#maxlength' => NULL,
     '#description' => t('The fully-qualified URL of the feed.'),
     '#required' => TRUE,
   );
diff --git a/core/modules/aggregator/aggregator.install b/core/modules/aggregator/aggregator.install
index eecd14fb27f1d66ff08d97160a8f820303a18043..ac4fce8befb0c53d74779a35ec7c75f1c985b455 100644
--- a/core/modules/aggregator/aggregator.install
+++ b/core/modules/aggregator/aggregator.install
@@ -130,10 +130,8 @@ function aggregator_schema() {
         'description' => 'Title of the feed.',
       ),
       'url' => array(
-        'type' => 'varchar',
-        'length' => 255,
+        'type' => 'text',
         'not null' => TRUE,
-        'default' => '',
         'description' => 'URL to the feed.',
       ),
       'refresh' => array(
@@ -155,10 +153,8 @@ function aggregator_schema() {
         'description' => 'Time when this feed was queued for refresh, 0 if not queued.',
       ),
       'link' => array(
-        'type' => 'varchar',
-        'length' => 255,
+        'type' => 'text',
         'not null' => TRUE,
-        'default' => '',
         'description' => 'The parent website of the feed; comes from the <link> element in the feed.',
       ),
       'description' => array(
@@ -202,13 +198,13 @@ function aggregator_schema() {
       )
     ),
     'primary key' => array('fid'),
-    'unique keys' => array(
-      'url'  => array('url'),
-      'title' => array('title'),
-    ),
     'indexes' => array(
+      'url'  => array(array('url', 255)),
       'queued' => array('queued'),
     ),
+    'unique keys' => array(
+      'title' => array('title'),
+    ),
   );
 
   $schema['aggregator_item'] = array(
@@ -233,10 +229,8 @@ function aggregator_schema() {
         'description' => 'Title of the feed item.',
       ),
       'link' => array(
-        'type' => 'varchar',
-        'length' => 255,
+        'type' => 'text',
         'not null' => TRUE,
-        'default' => '',
         'description' => 'Link to the feed item.',
       ),
       'author' => array(
@@ -258,9 +252,8 @@ function aggregator_schema() {
         'description' => 'Posted date of the feed item, as a Unix timestamp.',
       ),
       'guid' => array(
-        'type' => 'varchar',
-        'length' => 255,
-        'not null' => FALSE,
+        'type' => 'text',
+        'not null' => TRUE,
         'description' => 'Unique identifier for the feed item.',
       )
     ),
diff --git a/core/modules/aggregator/aggregator.module b/core/modules/aggregator/aggregator.module
index bb66cbefc37d6b4d8bd7891b330f587f81d88117..81b8c7f334e61bd07d64084185482960f05f02ca 100644
--- a/core/modules/aggregator/aggregator.module
+++ b/core/modules/aggregator/aggregator.module
@@ -537,6 +537,7 @@ function aggregator_save_feed($edit) {
         'url' => $edit['url'],
         'refresh' => $edit['refresh'],
         'block' => $edit['block'],
+        'link' => '',
         'description' => '',
         'image' => '',
       ))
@@ -573,15 +574,13 @@ function aggregator_remove($feed) {
   // Call hook_aggregator_remove() on all modules.
   module_invoke_all('aggregator_remove', $feed);
   // Reset feed.
-  db_merge('aggregator_feed')
-    ->key(array('fid' => $feed->fid))
+  db_update('aggregator_feed')
+    ->condition('fid', $feed->fid)
     ->fields(array(
       'checked' => 0,
       'hash' => '',
       'etag' => '',
       'modified' => 0,
-      'description' => $feed->description,
-      'image' => $feed->image,
     ))
     ->execute();
 }
diff --git a/core/modules/aggregator/aggregator.test b/core/modules/aggregator/aggregator.test
index 27c46737eb27ad8d358004bf09552af36adfc0e0..15d2b58499d5ba4cea987356f5f26a84abf97b06 100644
--- a/core/modules/aggregator/aggregator.test
+++ b/core/modules/aggregator/aggregator.test
@@ -349,6 +349,35 @@ class AddFeedTestCase extends AggregatorTestCase {
     // Delete feed.
     $this->deleteFeed($feed);
   }
+
+  /**
+   * Tests feeds with very long URLs.
+   */
+  function testAddLongFeed() {
+    // Create a feed with a URL of > 255 characters.
+    $long_url = "https://www.google.com/search?ix=heb&sourceid=chrome&ie=UTF-8&q=angie+byron#sclient=psy-ab&hl=en&safe=off&source=hp&q=angie+byron&pbx=1&oq=angie+byron&aq=f&aqi=&aql=&gs_sm=3&gs_upl=0l0l0l10534l0l0l0l0l0l0l0l0ll0l0&bav=on.2,or.r_gc.r_pw.r_cp.,cf.osb&fp=a70b6b1f0abe28d8&biw=1629&bih=889&ix=heb";
+    $feed = $this->createFeed($long_url);
+
+    // Create a second feed of > 255 characters, where the only difference is
+    // after the 255th character.
+    $long_url_2 = "https://www.google.com/search?ix=heb&sourceid=chrome&ie=UTF-8&q=angie+byron#sclient=psy-ab&hl=en&safe=off&source=hp&q=angie+byron&pbx=1&oq=angie+byron&aq=f&aqi=&aql=&gs_sm=3&gs_upl=0l0l0l10534l0l0l0l0l0l0l0l0ll0l0&bav=on.2,or.r_gc.r_pw.r_cp.,cf.osb&fp=a70b6b1f0abe28d8&biw=1629&bih=889";
+    $feed_2 = $this->createFeed($long_url_2);
+
+    // Check feed data.
+    $this->assertTrue($this->uniqueFeed($feed->title, $feed->url), 'The first long URL feed is unique.');
+    $this->assertTrue($this->uniqueFeed($feed_2->title, $feed_2->url), 'The second long URL feed is unique.');
+
+    // Check feed source.
+    $this->drupalGet('aggregator/sources/' . $feed->fid);
+    $this->assertResponse(200, 'Long URL feed source exists.');
+    $this->assertText($feed->title, 'Page title');
+    $this->drupalGet('aggregator/sources/' . $feed->fid . '/categorize');
+    $this->assertResponse(200, 'Long URL feed categorization page exists.');
+
+    // Delete feeds.
+    $this->deleteFeed($feed);
+    $this->deleteFeed($feed_2);
+  }
 }
 
 class CategorizeFeedTestCase extends AggregatorTestCase {