Added `@since`, adjusted changelog #9425

framework/CHANGELOG.md

@@ -4,7 +4,7 @@ Yii Framework 2 Change Log
 2.0.8 under development
 -----------------------
 
-- Enh #9425: `yii\db\Query::exists()` now uses SQL standard `SELECT EXISTS()` query improving performance in some cases (PowerGamer1)
+- Enh #9425: `yii\db\Query::exists()` now uses SQL standard `EXISTS()` query via new `yii\db\QueryBuilder::selectExists()` method to improving performance in some cases (PowerGamer1)
 - Bug #9935: Fixed `yii\validators\EachValidator` does not invoke `validateAttribute()` method of the embedded validator (klimov-paul)
 - Bug #11270: Fixed `BaseActiveRecord::link()` method in order to support closure in `indexBy` for relations declaration (iushev)
 - Bug #11333: Avoid serializing PHP 7 errors (zuozp8)

framework/db/QueryBuilder.php

@@ -1345,6 +1345,8 @@ class QueryBuilder extends \yii\base\Object
      * Creates a SELECT EXISTS() SQL statement.
      * @param string $rawSql the subquery in a raw form to select from.
      * @return string the SELECT EXISTS() SQL statement.
+     *
+     * @since 2.0.8
      */
     public function selectExists($rawSql)
     {