diff --git a/core/core.services.yml b/core/core.services.yml
index 0b8be53..f36eb44 100644
--- a/core/core.services.yml
+++ b/core/core.services.yml
@@ -146,7 +146,7 @@ services:
     class: Drupal\Core\Path\AliasWhitelist
     tags:
       - { name: needs_destruction }
-    arguments: [path_alias_whitelist, '@cache.default', '@lock', '@state', '@database']
+    arguments: [path_alias_whitelist, '@cache.default', '@lock', '@state', '@path.alias_storage']
   path.alias_manager:
     class: Drupal\Core\Path\AliasManager
     arguments: ['@path.alias_storage', '@path.alias_whitelist', '@language_manager']
diff --git a/core/lib/Drupal/Core/Path/AliasStorage.php b/core/lib/Drupal/Core/Path/AliasStorage.php
index 2062ebc..aa6989c 100644
--- a/core/lib/Drupal/Core/Path/AliasStorage.php
+++ b/core/lib/Drupal/Core/Path/AliasStorage.php
@@ -185,4 +185,83 @@ public function lookupPathSource($path, $langcode) {
 
     return $result->fetchField();
   }
+
+  /**
+   * Checks if alias already exists.
+   *
+   * @param string $alias
+   *   Alias to check against.
+   * @param string $langcode
+   *   Language of the alias.
+   * @param string $source
+   *   Path that alias is to be assigned to (optional).
+   * @return boolean
+   *   TRUE if alias already exists and FALSE otherwise.
+   */
+  public function aliasExists($alias, $langcode, $source = NULL) {
+    $query = $this->connection->select('url_alias')
+      ->condition('alias', $alias)
+      ->condition('langcode', $langcode);
+    if (!empty($source)) {
+      $query->condition('source', $source, '<>');
+    }
+    $query->addExpression('1');
+    $query->range(0, 1);
+    return (bool) $query->execute()->fetchField();
+  }
+
+  /**
+   * Checks if there are any aliases with language defined.
+   *
+   * @return bool
+   *   TRUE if aliases with language exist.
+   */
+  public function languageAliasExists() {
+    return (bool) $this->connection->queryRange('SELECT 1 FROM {url_alias} WHERE langcode <> :langcode', 0, 1, array(':langcode' => Language::LANGCODE_NOT_SPECIFIED))->fetchField();
+  }
+
+  /**
+   * Loads aliases for admin listing.
+   *
+   * @param array $header
+   *   Table header.
+   * @param string $keys
+   *   Search keys.
+   * @return array
+   *   Array of items to be displayed on the current page.
+   */
+  public function getAliasesForAdminListing($header, $keys = NULL) {
+    $query = $this->connection->select('url_alias')
+      ->extend('Drupal\Core\Database\Query\PagerSelectExtender')
+      ->extend('Drupal\Core\Database\Query\TableSortExtender');
+    if ($keys) {
+      // Replace wildcards with PDO wildcards.
+      $query->condition('alias', '%' . preg_replace('!\*+!', '%', $keys) . '%', 'LIKE');
+    }
+    return $query
+      ->fields('url_alias')
+      ->orderByHeader($header)
+      ->limit(50)
+      ->execute()
+      ->fetchAll();
+  }
+
+  /**
+   * Check if any alias exists starting with $initial_substring.
+   *
+   * @param $initial_substring
+   *   Initial path substring to test against.
+   *
+   * @return
+   *   TRUE if any alias exists, FALSE otherwise.
+   */
+  public function pathHasMatchingAlias($initial_substring) {
+    $query = $this->connection->select('url_alias', 'u');
+    $query->addExpression(1);
+    return (bool) $query
+      ->condition('u.source', $this->connection->escapeLike($initial_substring) . '%', 'LIKE')
+      ->range(0, 1)
+      ->execute()
+      ->fetchField();
+  }
 }
diff --git a/core/lib/Drupal/Core/Path/AliasWhitelist.php b/core/lib/Drupal/Core/Path/AliasWhitelist.php
index 643fea4..ac8a5e5 100644
--- a/core/lib/Drupal/Core/Path/AliasWhitelist.php
+++ b/core/lib/Drupal/Core/Path/AliasWhitelist.php
@@ -26,11 +26,11 @@ class AliasWhitelist extends CacheCollector implements AliasWhitelistInterface {
   protected $state;
 
   /**
-   * The database connection.
+   * The Path CRUD service.
    *
-   * @var \Drupal\Core\Database\Connection
+   * @var \Drupal\Core\Path\Path
    */
-  protected $connection;
+  protected $path;
 
   /**
    * Constructs an AliasWhitelist object.
@@ -43,13 +43,13 @@ class AliasWhitelist extends CacheCollector implements AliasWhitelistInterface {
    *   The lock backend.
    * @param \Drupal\Core\KeyValueStore\StateInterface $state
    *   The state keyvalue store.
-   * @param \Drupal\Core\Database\Connection $connection
-   *   The database connection.
+   * @param \Drupal\Core\Path\PathInterface $path
+   *   The Path CRUD service.
    */
-  public function __construct($cid, CacheBackendInterface $cache, LockBackendInterface $lock, StateInterface $state, Connection $connection) {
+  public function __construct($cid, CacheBackendInterface $cache, LockBackendInterface $lock, StateInterface $state, PathInterface $path) {
     parent::__construct($cid, $cache, $lock);
     $this->state = $state;
-    $this->connection = $connection;
+    $this->path = $path;
   }
 
   /**
@@ -107,13 +107,7 @@ public function get($offset) {
    * {@inheritdoc}
    */
   public function resolveCacheMiss($root) {
-    $query = $this->connection->select('url_alias', 'u');
-    $query->addExpression(1);
-    $exists = (bool) $query
-      ->condition('u.source', $this->connection->escapeLike($root) . '%', 'LIKE')
-      ->range(0, 1)
-      ->execute()
-      ->fetchField();
+    $exists = $this->path->pathHasMatchingAlias($root);
     $this->storage[$root] = $exists;
     $this->persist($root);
     if ($exists) {
diff --git a/core/modules/migrate/lib/Drupal/migrate/Plugin/migrate/destination/UrlAlias.php b/core/modules/migrate/lib/Drupal/migrate/Plugin/migrate/destination/UrlAlias.php
index dafbb76..fa31329 100644
--- a/core/modules/migrate/lib/Drupal/migrate/Plugin/migrate/destination/UrlAlias.php
+++ b/core/modules/migrate/lib/Drupal/migrate/Plugin/migrate/destination/UrlAlias.php
@@ -39,7 +39,7 @@ class UrlAlias extends DestinationBase implements ContainerFactoryPluginInterfac
    * @param MigrationInterface $migration
    *   The migration.
    * @param \Drupal\Core\Path\AliasStorage $alias_storage
-   *   The path crud service.
+   *   The alias storage service.
    */
   public function __construct(array $configuration, $plugin_id, array $plugin_definition, MigrationInterface $migration, AliasStorage $alias_storage) {
     parent::__construct($configuration, $plugin_id, $plugin_definition, $migration);
diff --git a/core/modules/path/path.admin.inc b/core/modules/path/path.admin.inc
index 68697bf..5e04bd9 100644
--- a/core/modules/path/path.admin.inc
+++ b/core/modules/path/path.admin.inc
@@ -22,8 +22,7 @@ function path_admin_overview($keys = NULL) {
   $build['path_admin_filter_form'] = \Drupal::formBuilder()->getForm('path_admin_filter_form', $keys);
   // Enable language column if language.module is enabled or if we have any
   // alias with a language.
-  $alias_exists = (bool) db_query_range('SELECT 1 FROM {url_alias} WHERE langcode <> :langcode', 0, 1, array(':langcode' => Language::LANGCODE_NOT_SPECIFIED))->fetchField();
-  $multilanguage = (\Drupal::moduleHandler()->moduleExists('language') || $alias_exists);
+  $multilanguage = (\Drupal::moduleHandler()->moduleExists('language') || \Drupal::service('path.alias_storage')->languageAliasExists());
 
   $header = array();
   $header[] = array('data' => t('Alias'), 'field' => 'alias', 'sort' => 'asc');
@@ -33,22 +32,11 @@ function path_admin_overview($keys = NULL) {
   }
   $header[] = t('Operations');
 
-  $query = db_select('url_alias')
-    ->extend('Drupal\Core\Database\Query\PagerSelectExtender')
-    ->extend('Drupal\Core\Database\Query\TableSortExtender');
-  if ($keys) {
-    // Replace wildcards with PDO wildcards.
-    $query->condition('alias', '%' . preg_replace('!\*+!', '%', $keys) . '%', 'LIKE');
-  }
-  $result = $query
-    ->fields('url_alias')
-    ->orderByHeader($header)
-    ->limit(50)
-    ->execute();
-
   $rows = array();
   $destination = drupal_get_destination();
-  foreach ($result as $data) {
+  /** @var \Drupal\core\Path\AliasStorage $alias_storage */
+  $alias_storage = \Drupal::service('path.alias_storage');
+  foreach ($alias_storage->getAliasesForAdminListing($header, $keys) as $data) {
     $row = array();
     $row['data']['alias'] = l(truncate_utf8($data->alias, 50, FALSE, TRUE), $data->source, array(
       'attributes' => array('title' => $data->alias),
@@ -230,19 +218,11 @@ function path_admin_form_validate($form, &$form_state) {
   $source = &$form_state['values']['source'];
   $source = \Drupal::service('path.alias_manager')->getSystemPath($source);
   $alias = $form_state['values']['alias'];
-  $pid = isset($form_state['values']['pid']) ? $form_state['values']['pid'] : 0;
   // Language is only set if language.module is enabled, otherwise save for all
   // languages.
   $langcode = isset($form_state['values']['langcode']) ? $form_state['values']['langcode'] : Language::LANGCODE_NOT_SPECIFIED;
 
-  $has_alias = db_query("SELECT COUNT(alias) FROM {url_alias} WHERE pid <> :pid AND alias = :alias AND langcode = :langcode", array(
-      ':pid' => $pid,
-      ':alias' => $alias,
-      ':langcode' => $langcode,
-    ))
-    ->fetchField();
-
-  if ($has_alias) {
+  if (\Drupal::service('path.alias_storage')->aliasExists($alias, $langcode, $source)) {
     form_set_error('alias', $form_state, t('The alias %alias is already in use in this language.', array('%alias' => $alias)));
   }
   if (!drupal_valid_path($source)) {
diff --git a/core/modules/path/path.module b/core/modules/path/path.module
index 262075f..ee852a2 100644
--- a/core/modules/path/path.module
+++ b/core/modules/path/path.module
@@ -131,15 +131,7 @@ function path_form_element_validate($element, &$form_state, $complete_form) {
     $path = $form_state['values']['path'];
 
     // Ensure that the submitted alias does not exist yet.
-    $query = db_select('url_alias')
-      ->condition('alias', $path['alias'])
-      ->condition('langcode', $path['langcode']);
-    if (!empty($path['source'])) {
-      $query->condition('source', $path['source'], '<>');
-    }
-    $query->addExpression('1');
-    $query->range(0, 1);
-    if ($query->execute()->fetchField()) {
+    if (\Drupal::service('path.alias_storage')->aliasExists($path['alias'], $path['langcode'], $path['source'])) {
       form_error($element, $form_state, t('The alias is already in use.'));
     }
   }
diff --git a/core/modules/system/lib/Drupal/system/Tests/Path/AliasTest.php b/core/modules/system/lib/Drupal/system/Tests/Path/AliasTest.php
index 5a39c04..cf6e5ee 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Path/AliasTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Path/AliasTest.php
@@ -168,9 +168,9 @@ function testWhitelist() {
     $memoryCounterBackend = new MemoryCounterBackend('default');
 
     // Create AliasManager and Path object.
-    $whitelist = new AliasWhitelist('path_alias_whitelist', $memoryCounterBackend, $this->container->get('lock'), $this->container->get('state'), $connection);
-    $aliasStorage = new AliasStorage($connection, $this->container->get('module_handler'));
-    $aliasManager = new AliasManager($aliasStorage, $whitelist, $this->container->get('language_manager'));
+    $path = new AliasStorage($connection, $this->container->get('module_handler'));
+    $whitelist = new AliasWhitelist('path_alias_whitelist', $memoryCounterBackend, $this->container->get('lock'), $this->container->get('state'), $path);
+    $aliasManager = new AliasManager($path, $whitelist, $this->container->get('language_manager'));
 
     // No alias for user and admin yet, so should be NULL.
     $this->assertNull($whitelist->get('user'));
@@ -208,7 +208,7 @@ function testWhitelist() {
 
     // Re-initialize the whitelist using the same cache backend, should load
     // from cache.
-    $whitelist = new AliasWhitelist('path_alias_whitelist', $memoryCounterBackend, $this->container->get('lock'), $this->container->get('state'), $connection);
+    $whitelist = new AliasWhitelist('path_alias_whitelist', $memoryCounterBackend, $this->container->get('lock'), $this->container->get('state'), $path);
     $this->assertNull($whitelist->get('user'));
     $this->assertTrue($whitelist->get('admin'));
     $this->assertNull($whitelist->get($this->randomName()));