fix bug

themis-business/src/main/resources/mapper/TEExamMapper.xml

@@ -66,7 +66,7 @@
         from t_e_exam t
         <where> 1 = 1
             <if test="userId != null and userId != ''">
-                EXISTS(
+                and EXISTS(
                 select
                 DISTINCT tees.exam_id
                 from