diff --git a/src/Action/Search/SearchAction.php b/src/Action/Search/SearchAction.php
index 412a4245bd357b5eb3d84ee43f4fb4836578ff19..023e5fcad15bea7f992c800dea42fcf2eb199823 100644
--- a/src/Action/Search/SearchAction.php
+++ b/src/Action/Search/SearchAction.php
@@ -211,7 +211,7 @@ final class SearchAction
      * @param Dataset      $dataset      Represents the requested dataset
      * @param string[]     $listOfIds    The substring of the url (parameter a)
      */
-    private function select(QueryBuilder $queryBuilder, Dataset $dataset, array $listOfIds): void
+    private function select(QueryBuilder $queryBuilder, Dataset $dataset, array $listOfIds): array
     {
         $columns = array();
         $attributes = array();
@@ -236,7 +236,7 @@ final class SearchAction
     {
         $expressions = array();
         foreach ($criteria as $criterion) {
-            $params = $params = explode(':', $criterion);
+            $params = $params = explode('::', $criterion);
             $attribute = $this->getAttribute($dataset, (int) $params[0]);
             $column = $attribute->getTableName() . '.' . $attribute->getName();
             $columnType = $attribute->getType();