Add assoc method into SqlResultCollection

Model/SqlResultCollection.php

@@ -37,4 +37,9 @@ class SqlResultCollection extends \ArrayIterator implements iSqlResultItems
     {
         return $this->offsetGet(0);
     }
+
+	public function assoc($field, $assoc_as_array = false) {
+		$sql_result_provider = new SqlResultProvider($this->items);
+		return $sql_result_provider->assoc($field, $assoc_as_array);
+	}
 }

Model/SqlResultProvider.php

@@ -19,7 +19,7 @@ class SqlResultProvider implements iSqlResultItems
     private $result_items_base;
 
     /**
-     * @param $result DbStatement
+     * @param $result DbStatement|array
      */
     public function __construct($result)
     {
@@ -29,8 +29,12 @@ class SqlResultProvider implements iSqlResultItems
     private function defineResultItems()
     {
         if (is_null($this->result_items_base)) {
-            $this->result_items_base = $this->result->fetchAll();
-            $this->result_items = $this->result_items_base;
+	        if (is_array($this->result)) {
+		        $this->result_items_base = $this->result;
+	        } else {
+		        $this->result_items_base = $this->result->fetchAll();
+	        }
+	        $this->result_items      = $this->result_items_base;
         }
     }