yiisoft / yii2

framework/db/Query.php

Doc Comments +3 added lines, -3 removed lines

@@ -425,7 +425,7 @@ 
      * Restores the value of select to make this query reusable.
      * @param string|Expression $selectExpression
      * @param Connection|null $db
-     * @return bool|string
+     * @return string
      */
     protected function queryScalar($selectExpression, $db)
     {
@@ -878,7 +878,7 @@ 
 
     /**
      * Sets the GROUP BY part of the query.
-     * @param string|array|Expression $columns the columns to be grouped by.
+     * @param string $columns the columns to be grouped by.
      * Columns can be specified in either a string (e.g. "id, name") or an array (e.g. ['id', 'name']).
      * The method will automatically quote the column names unless a column contains some parenthesis
      * (which means the column contains a DB expression).
@@ -1081,7 +1081,7 @@ 
 
     /**
      * Appends a SQL statement using UNION operator.
-     * @param string|Query $sql the SQL statement to be appended using UNION
+     * @param Query $sql the SQL statement to be appended using UNION
      * @param bool $all TRUE if using UNION ALL and FALSE if using UNION
      * @return $this the query object itself
      */