Index: lams_tool_assessment/src/java/org/lamsfoundation/lams/tool/assessment/dbupdates/patch20190423.sql
===================================================================
diff -u
--- lams_tool_assessment/src/java/org/lamsfoundation/lams/tool/assessment/dbupdates/patch20190423.sql	(revision 0)
+++ lams_tool_assessment/src/java/org/lamsfoundation/lams/tool/assessment/dbupdates/patch20190423.sql	(revision 029874e2f2302fc732117f132610f8ef3f4ade79)
@@ -0,0 +1,15 @@
+-- Turn off autocommit, so nothing is committed if there is an error
+SET AUTOCOMMIT = 0;
+SET FOREIGN_KEY_CHECKS=0;
+----------------------Put all sql statements below here-------------------------
+
+-- LDEV-4813 Add a missing foreign key and index to speed up queries
+ALTER TABLE tl_laasse10_option_answer ADD CONSTRAINT FK_tl_laasse10_option_answer_2 FOREIGN KEY (question_option_uid)
+	REFERENCES tl_laasse10_question_option (uid) ON DELETE CASCADE ON UPDATE CASCADE;
+
+----------------------Put all sql statements above here-------------------------
+
+-- If there were no errors, commit and restore autocommit to on
+COMMIT;
+SET AUTOCOMMIT = 1;
+SET FOREIGN_KEY_CHECKS=1;
\ No newline at end of file