diff --git a/core/lib/Drupal/Core/Entity/Query/Sql/pgsql/Condition.php b/core/lib/Drupal/Core/Entity/Query/Sql/pgsql/Condition.php
index 5d61eab..cb4a9af 100644
--- a/core/lib/Drupal/Core/Entity/Query/Sql/pgsql/Condition.php
+++ b/core/lib/Drupal/Core/Entity/Query/Sql/pgsql/Condition.php
@@ -10,8 +10,14 @@
 use Drupal\Core\Database\Query\SelectInterface;
 use Drupal\Core\Entity\Query\Sql\Condition as BaseCondition;
 
+/**
+ * Implements entity query conditions for PostgreSQL databases.
+ */
 class Condition extends BaseCondition {
 
+  /**
+   * {@inheritdoc}
+   */
   public static function translateCondition(&$condition, SelectInterface $sql_query, $case_sensitive) {
     if (is_array($condition['value']) && $case_sensitive === FALSE) {
       $condition['where'] = 'LOWER(' . $sql_query->escapeField($condition['real_field']) . ') ' . $condition['operator'] . ' (';