1 files changed, 43 insertions, 0 deletions
diff --git a/src/test/isolation/expected/merge-update.out b/src/test/isolation/expected/merge-update.out
index 55b1f90..f5f7e3b 100644
--- a/src/test/isolation/expected/merge-update.out
+++ b/src/test/isolation/expected/merge-update.out
@@ -48,6 +48,27 @@ key|val
 
 step c2: COMMIT;
 
+starting permutation: pa_merge1 c1 pa_merge2c_dup a2
+step pa_merge1: 
+  MERGE INTO pa_target t
+  USING (SELECT 1 as key, 'pa_merge1' as val) s
+  ON s.key = t.key
+  WHEN NOT MATCHED THEN
+	INSERT VALUES (s.key, s.val)
+  WHEN MATCHED THEN
+    UPDATE set val = t.val || ' updated by ' || s.val;
+
+step c1: COMMIT;
+step pa_merge2c_dup: 
+  MERGE INTO pa_target t
+  USING (VALUES (1), (1)) v(a)
+  ON t.key = v.a
+  WHEN MATCHED THEN
+	UPDATE set val = t.val || ' updated by pa_merge2c_dup';  -- should fail
+
+ERROR:  MERGE command cannot affect row a second time
+step a2: ABORT;
+
 starting permutation: merge1 merge2a c1 select2 c2
 step merge1: 
   MERGE INTO target t
@@ -312,3 +333,25 @@ key|val
 (2 rows)
 
 step c2: COMMIT;
+
+starting permutation: pa_merge1 pa_merge2c_dup c1 a2
+step pa_merge1: 
+  MERGE INTO pa_target t
+  USING (SELECT 1 as key, 'pa_merge1' as val) s
+  ON s.key = t.key
+  WHEN NOT MATCHED THEN
+	INSERT VALUES (s.key, s.val)
+  WHEN MATCHED THEN
+    UPDATE set val = t.val || ' updated by ' || s.val;
+
+step pa_merge2c_dup: 
+  MERGE INTO pa_target t
+  USING (VALUES (1), (1)) v(a)
+  ON t.key = v.a
+  WHEN MATCHED THEN
+	UPDATE set val = t.val || ' updated by pa_merge2c_dup';  -- should fail
+ <waiting ...>
+step c1: COMMIT;
+step pa_merge2c_dup: <... completed>
+ERROR:  MERGE command cannot affect row a second time
+step a2: ABORT;