Fix schema comparison with FK that contain quoted column names.

lib/Doctrine/DBAL/Schema/Comparator.php

@@ -322,11 +322,11 @@ class Comparator
      */
     public function diffForeignKey(ForeignKeyConstraint $key1, ForeignKeyConstraint $key2)
     {
-        if (array_map('strtolower', $key1->getLocalColumns()) != array_map('strtolower', $key2->getLocalColumns())) {
+        if (array_map('strtolower', $key1->getUnquotedLocalColumns()) != array_map('strtolower', $key2->getUnquotedLocalColumns())) {
             return true;
         }
 
-        if (array_map('strtolower', $key1->getForeignColumns()) != array_map('strtolower', $key2->getForeignColumns())) {
+        if (array_map('strtolower', $key1->getUnquotedForeignColumns()) != array_map('strtolower', $key2->getUnquotedForeignColumns())) {
             return true;
         }
 

lib/Doctrine/DBAL/Schema/ForeignKeyConstraint.php

@@ -163,6 +163,26 @@ class ForeignKeyConstraint extends AbstractAsset implements Constraint
         return $columns;
     }
 
+    /**
+     * Returns unquoted representation of local table column names for comparison with other FK
+     *
+     * @return array
+     */
+    public function getUnquotedLocalColumns()
+    {
+        return array_map(array($this, 'trimQuotes'), $this->getLocalColumns());
+    }
+
+    /**
+     * Returns unquoted representation of foreign table column names for comparison with other FK
+     *
+     * @return array
+     */
+    public function getUnquotedForeignColumns()
+    {
+        return array_map(array($this, 'trimQuotes'), $this->getForeignColumns());
+    }
+
     /**
      * {@inheritdoc}
      *