[fw-general] ZF-635: Zend_Db_Select getter methods to return individual parts

[Shekar C Reddy]

Just a couple of things:

- public function getPart($part)
+ public function &getPart($part)         // Returns part by reference
instead of as a copy to conserve memory

  public function reset($part = null)
   {
       if ($part == null) {
-            $this->_parts = $this->_partsInit;
+            $this->_parts = self::$_partsInit;
       } else if (array_key_exists($part, $this->_partsInit)) {
-            $this->_parts[$part] = $this->_partsInit[$part];
+           $this->_parts[$part] = self::$_partsInit[$part];
       }
   }

I noticed the new code is adding aliases to the column names which is
bombing in certain cases:

$select->from( 'user', 'Count(*)' );
$select->where( 'ID = ?', $id );
echo $select->__toString();

Output:
SELECT user_1.Count(*)
FROM user user_1
WHERE
  ID = 1

The above is not a valid SQL statement. I guess we need to either remove the
aliasing logic or provide an additional argument (default true) to prefix
aliases or not.

Regards,