update UPDATE test

Signed-off-by: Bugen Zhao <[email protected]>

e2e_test/batch/basic/dml_update.slt.part

@@ -93,10 +93,15 @@ select * from t;
 889 999
 
 # Multiple assignments, to subquery with cast failure.
-# TODO: this currently shows `cannot cast type "record" to "record"` because we wrap the subquery result
-#       into a struct, which is not quite clear.
-statement error cannot cast type
+statement error
 update t set (v1, v2) = (select '888.88', 999);
+----
+db error: ERROR: Failed to run the query
+
+Caused by these errors (recent errors listed first):
+  1: cannot cast type "record" to "record" in Assign context
+  2: cannot cast type "character varying" to "integer" in Assign context
+
 
 # Multiple assignments, to subquery with mismatched column count.
 statement error number of columns does not match number of values