diff --git a/src/applications/paste/query/PhabricatorPasteSearchEngine.php b/src/applications/paste/query/PhabricatorPasteSearchEngine.php
--- a/src/applications/paste/query/PhabricatorPasteSearchEngine.php
+++ b/src/applications/paste/query/PhabricatorPasteSearchEngine.php
@@ -11,21 +11,24 @@
     return 'PhabricatorPasteApplication';
   }
 
-  public function buildQueryFromSavedQuery(PhabricatorSavedQuery $saved) {
+  public function buildQueryFromParameters(array $map) {
     $query = id(new PhabricatorPasteQuery())
-      ->needContent(true)
-      ->withAuthorPHIDs($saved->getParameter('authorPHIDs', array()))
-      ->withLanguages($saved->getParameter('languages', array()));
+      ->needContent(true);
 
-    $start = $this->parseDateTime($saved->getParameter('createdStart'));
-    $end = $this->parseDateTime($saved->getParameter('createdEnd'));
+    if ($map['authorPHIDs']) {
+      $query->withAuthorPHIDs($map['authorPHIDs']);
+    }
+
+    if ($map['languages']) {
+      $query->withLanguages($map['languages']);
+    }
 
-    if ($start) {
-      $query->withDateCreatedAfter($start);
+    if ($map['createdStart']) {
+      $query->withDateCreatedAfter($map['createdStart']);
     }
 
-    if ($end) {
-      $query->withDateCreatedBefore($end);
+    if ($map['createdEnd']) {
+      $query->withDateCreatedBefore($map['createdEnd']);
     }
 
     return $query;
diff --git a/src/applications/search/engine/PhabricatorApplicationSearchEngine.php b/src/applications/search/engine/PhabricatorApplicationSearchEngine.php
--- a/src/applications/search/engine/PhabricatorApplicationSearchEngine.php
+++ b/src/applications/search/engine/PhabricatorApplicationSearchEngine.php
@@ -90,8 +90,24 @@
    * @param PhabricatorSavedQuery The saved query to operate on.
    * @return The result of the query.
    */
-  abstract public function buildQueryFromSavedQuery(
-    PhabricatorSavedQuery $saved);
+  public function buildQueryFromSavedQuery(PhabricatorSavedQuery $saved) {
+    $fields = $this->buildSearchFields();
+    $viewer = $this->requireViewer();
+
+    $parameters = array();
+    foreach ($fields as $field) {
+      $field->setViewer($viewer);
+      $field->readValueFromSavedQuery($saved);
+      $value = $field->getValueForQuery($field->getValue());
+      $parameters[$field->getKey()] = $value;
+    }
+
+    return $this->buildQueryFromParameters($parameters);
+  }
+
+  protected function buildQueryFromParameters(array $parameters) {
+    throw new PhutilMethodNotImplementedException();
+  }
 
   /**
    * Builds the search form using the request.
diff --git a/src/applications/search/field/PhabricatorSearchDateField.php b/src/applications/search/field/PhabricatorSearchDateField.php
--- a/src/applications/search/field/PhabricatorSearchDateField.php
+++ b/src/applications/search/field/PhabricatorSearchDateField.php
@@ -11,6 +11,10 @@
     return $request->getStr($key);
   }
 
+  public function getValueForQuery($value) {
+    return $this->parseDateTime($value);
+  }
+
   protected function validateControlValue($value) {
     if (!strlen($value)) {
       return;
diff --git a/src/applications/search/field/PhabricatorSearchField.php b/src/applications/search/field/PhabricatorSearchField.php
--- a/src/applications/search/field/PhabricatorSearchField.php
+++ b/src/applications/search/field/PhabricatorSearchField.php
@@ -201,6 +201,10 @@
     return null;
   }
 
+  public function getValueForQuery($value) {
+    return $value;
+  }
+
 
 /* -(  Rendering Controls  )------------------------------------------------- */
 
diff --git a/src/applications/search/field/PhabricatorSearchTokenizerField.php b/src/applications/search/field/PhabricatorSearchTokenizerField.php
--- a/src/applications/search/field/PhabricatorSearchTokenizerField.php
+++ b/src/applications/search/field/PhabricatorSearchTokenizerField.php
@@ -11,11 +11,18 @@
     return $this->getListFromRequest($request, $key);
   }
 
+  public function getValueForQuery($value) {
+    return $this->newDatasource()
+      ->setViewer($this->getViewer())
+      ->evaluateTokens($value);
+  }
+
   protected function newControl() {
     return id(new AphrontFormTokenizerControl())
       ->setDatasource($this->newDatasource());
   }
 
+
   abstract protected function newDatasource();
 
 }
diff --git a/src/applications/search/field/PhabricatorSearchUsersField.php b/src/applications/search/field/PhabricatorSearchUsersField.php
--- a/src/applications/search/field/PhabricatorSearchUsersField.php
+++ b/src/applications/search/field/PhabricatorSearchUsersField.php
@@ -8,9 +8,7 @@
   }
 
   protected function newDatasource() {
-    // TODO: Make this use PhabricatorPeopleUserFunctionDatasource once field
-    // support is a little more powerful.
-    return new PhabricatorPeopleDatasource();
+    return new PhabricatorPeopleUserFunctionDatasource();
   }
 
   protected function getValueFromRequest(AphrontRequest $request, $key) {