mysql param types, async search, bugfix

Core/Objects/DatabaseEntity/Controller/DatabaseEntityHandler.php

@@ -342,7 +342,9 @@ class DatabaseEntityHandler implements Persistable {
 
     $value = $row[$columnName];
     if ($column instanceof DateTimeColumn) {
-      $value = new \DateTime($value);
+      if ($value !== null) {
+        $value = new \DateTime($value);
+      }
     } else if ($column instanceof JsonColumn) {
       $value = json_decode($value, true);
     } else if (isset($this->relations[$propertyName])) {

Core/Objects/DatabaseEntity/Controller/DatabaseEntityQuery.class.php

@@ -138,7 +138,7 @@ class DatabaseEntityQuery extends Select {
     }
   }
 
-  public function execute(): DatabaseEntity|array|null {
+  public function execute(): DatabaseEntity|array|null|false {
 
     if ($this->logVerbose) {
       $params = [];
@@ -148,7 +148,7 @@ class DatabaseEntityQuery extends Select {
 
     $res = parent::execute();
     if ($res === null || $res === false) {
-      return null;
+      return $res;
     }
 
     if ($this->resultType === SQL::FETCH_ALL) {