diff --git a/lib/Doctrine/Hydrate.php b/lib/Doctrine/Hydrate.php
index 8521c9966..f3a71ed9a 100644
--- a/lib/Doctrine/Hydrate.php
+++ b/lib/Doctrine/Hydrate.php
@@ -162,12 +162,24 @@ class Doctrine_Hydrate
 
         return $alias;
     }
-
-    public function hasAlias($tableName)
+    /**
+     * hasTableAlias
+     * whether or not this object has given tableAlias
+     *
+     * @param string $tableAlias    the table alias to be checked
+     * @return boolean              true if this object has given alias, otherwise false
+     */
+    public function hasTableAlias($tableAlias)
     {
-        return (isset($this->_tableAliases[$tableName]));
+        return (isset($this->_tableAliases[$tableAlias]));
     }
-    
+    /**
+     * getComponentAlias
+     * get component alias associated with given table alias
+     *
+     * @param string $tableAlias    the table alias that identifies the component alias
+     * @return string               component alias
+     */
     public function getComponentAlias($tableAlias)
     {
         if ( ! isset($this->_tableAliases[$tableAlias])) {
diff --git a/lib/Doctrine/Query.php b/lib/Doctrine/Query.php
index 4952c4914..7f235c2d0 100644
--- a/lib/Doctrine/Query.php
+++ b/lib/Doctrine/Query.php
@@ -755,7 +755,7 @@ class Doctrine_Query extends Doctrine_Query_Abstract implements Countable
                 continue;
             }
 
-            if($this->hasAlias($part)) {
+            if($this->hasTableAlias($part)) {
                 $parts[$k] = $this->generateNewTableAlias($part);
             }
 
diff --git a/lib/Doctrine/RawSql.php b/lib/Doctrine/RawSql.php
index 77b3e1de2..78afcadec 100644
--- a/lib/Doctrine/RawSql.php
+++ b/lib/Doctrine/RawSql.php
@@ -135,7 +135,7 @@ class Doctrine_RawSql extends Doctrine_Query_Abstract
                 throw new Doctrine_RawSql_Exception('All selected fields in Sql query must be in format tableAlias.fieldName');
             }
             // try to auto-add component
-            if ( ! $this->hasAlias($e[0])) {
+            if ( ! $this->hasTableAlias($e[0])) {
                 try {
                     $this->addComponent($e[0], ucwords($e[0]));
                 } catch(Doctrine_Exception $exception) {