改名

Database/Mysql/Columns.php

@@ -276,14 +276,15 @@ class Columns extends Component
 	private function structure($table)
 	{
 		if (isset($this->columns[$table])) {
-			return $this->columns[$table];
-		}
 			$sql = $this->db->getBuild()->getColumn($table);
 			$column = $this->db->createCommand($sql)->all();
 			if (empty($column)) {
 				throw new Exception("The table " . $table . " not exists.");
 			}
 			return $this->columns[$table] = $this->resolve($column, $table);
+
+		}
+		return $this->columns[$table];
 	}