IRowContainer: Added method fetchField() (BC break)

Author: foxycode

src/Database/IRowContainer.php

@@ -22,6 +22,13 @@ interface IRowContainer extends \Traversable
 	 */
 	function fetch();
 
+	/**
+	 * Fetches single field.
+	 * @param  int|string
+	 * @return mixed
+	 */
+	function fetchField($column = 0);
+
 	/**
 	 * Fetches all rows as associative array.
 	 * @param  string|int column name used for an array key or NULL for numeric index

src/Database/ResultSet.php

@@ -274,9 +274,7 @@ public function fetch()
 
 
 	/**
-	 * Fetches single field.
-	 * @param  int
-	 * @return mixed
+	 * @inheritDoc
 	 */
 	public function fetchField($column = 0)
 	{