Document QueryException

UPGRADE.md

@@ -7,6 +7,7 @@
 3. The `addSelect()` method can be no longer called without arguments.
 4. The `insert()`, `update()` and `delete()` methods now require the `$table` parameter, and do not support aliases anymore.
 5. The `add()`, `getQueryPart()`, `getQueryParts()`, `resetQueryPart()` and `resetQueryParts()` methods are removed.
+6. The `getSQL()` method now throws an expression if no `SELECT` expressions have been provided.
 
 ## BC BREAK: `OCI8Statement::convertPositionalToNamedPlaceholders()` is removed.
 

lib/Doctrine/DBAL/Query/QueryBuilder.php

@@ -269,6 +269,8 @@ public function execute()
  * </code>
  *
  * @return string The SQL query string.
+ *
+ * @throws QueryException If the SELECT query is empty.
  */
  public function getSQL() : string
  {