diff --git a/schema.sql b/schema.sql
index a5f98fb..69f57ef 100644
--- a/schema.sql
+++ b/schema.sql
@@ -72,7 +72,8 @@ CREATE TABLE `result_GenericExperimentMessage` (
   `resulttype` enum('OK_MARKER','FAIL_MARKER','DETECTED_MARKER','GROUP1_MARKER','GROUP2_MARKER','GROUP3_MARKER','GROUP4_MARKER','TIMEOUT','TRAP','WRITE_TEXTSEGMENT','ACCESS_OUTERSPACE','SDC','UNKNOWN') NOT NULL,
   `crash_time` bigint(20) unsigned NOT NULL,
   `details` bigint(20) unsigned DEFAULT NULL,
-  PRIMARY KEY (`pilot_id`,`data_physical_address`,`bitoffset`)
+  PRIMARY KEY (`pilot_id`,`data_physical_address`,`bitoffset`),
+  KEY `pilot_resulttype` (`pilot_id`,`resulttype`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
 CREATE TABLE `trace` (