Fixes #2175: QueryBuilder will now append UNION statements at the end of the primary SQL

framework/CHANGELOG.md

@@ -128,6 +128,7 @@ Yii Framework 2 Change Log
 - Chg #2157: The '*' category pattern will match all categories that do not match any other patterns listed in `I18N::translations` (qiangxue, Ragazzo)
 - Chg #2161: Added ability to use `return` in `Widget::run` (samdark)
 - Chg #2173: Removed `StringHelper::diff()`, Moved `phpspec/php-diff` dependency from `yiisoft/yii2` to `yiisoft/yii2-gii` (samdark)
+- Chg #2175: QueryBuilder will now append UNION statements at the end of the primary SQL (qiangxue)
 - Chg: Renamed `yii\jui\Widget::clientEventsMap` to `clientEventMap` (qiangxue)
 - Chg: Renamed `ActiveRecord::getPopulatedRelations()` to `getRelatedRecords()` (qiangxue)
 - Chg: Renamed `attributeName` and `className` to `targetAttribute` and `targetClass` for `UniqueValidator` and `ExistValidator` (qiangxue)

framework/db/QueryBuilder.php

@@ -69,9 +69,9 @@ class QueryBuilder extends \yii\base\Object
 			$this->buildWhere($query->where, $params),
 			$this->buildGroupBy($query->groupBy),
 			$this->buildHaving($query->having, $params),
-			$this->buildUnion($query->union, $params),
 			$this->buildOrderBy($query->orderBy),
 			$this->buildLimit($query->limit, $query->offset),
+			$this->buildUnion($query->union, $params),
 		];
 		return [implode($this->separator, array_filter($clauses)), $params];
 	}