6 files declare their use of QueryException in Drupal 8

Condition.php in core/lib/Drupal/Core/Config/Entity/Query/Condition.php

Query.php in core/lib/Drupal/Core/Entity/Query/Sql/Query.php

QueryFactory.php in core/lib/Drupal/Core/Config/Entity/Query/QueryFactory.php

QueryFactory.php in core/lib/Drupal/Core/Entity/KeyValueStore/Query/QueryFactory.php

QueryTest.php in core/tests/Drupal/Tests/Core/Entity/Query/Sql/QueryTest.php

Tables.php in core/lib/Drupal/Core/Entity/Query/Sql/Tables.php