fix case

Signed-off-by: guo-shaoge <shaoge1994@163.com>

planner/core/testdata/ordered_result_mode_suite_in.json

@@ -63,7 +63,7 @@
       "select b from t1 where b in (1, 2, 3, 4)",
       "select * from t1 where a > 10 union all select * from t2 where b > 20",
       "select * from t1 where a > 10 union distinct select * from t2 where b > 20",
-      "select row_number() over(partition by a) as row_no, sum(b) over(partition by a) as sum_b from t1",
+      "select sum(b) over(partition by a) as sum_b from t1",
       "select min(a), max(b), sum(c) from t1 group by d",
       "select min(a), max(b), sum(c) from t1 group by d having max(b) < 20",
       "select case when a=1 then 'a1' when a=2 then 'a2' else 'ax' end from t1 "

planner/core/testdata/ordered_result_mode_suite_out.json

@@ -378,12 +378,11 @@
       },
       {
         "Plan": [
-          "Projection_10 10000.00 root  Column#8, Column#7",
-          "└─Sort_11 10000.00 root  test.t1.a, Column#7, Column#8",
-          "  └─Window_13 10000.00 root  row_number()->Column#8 over(partition by test.t1.a)",
-          "    └─Window_14 10000.00 root  sum(cast(test.t1.b, decimal(32,0) BINARY))->Column#7 over(partition by test.t1.a)",
-          "      └─TableReader_17 10000.00 root  data:TableFullScan_16",
-          "        └─TableFullScan_16 10000.00 cop[tikv] table:t1 keep order:true, stats:pseudo"
+          "Projection_8 10000.00 root  Column#6",
+          "└─Sort_9 10000.00 root  test.t1.b, test.t1.a, Column#6",
+          "  └─Window_11 10000.00 root  sum(cast(test.t1.b, decimal(32,0) BINARY))->Column#6 over(partition by test.t1.a)",
+          "    └─TableReader_13 10000.00 root  data:TableFullScan_12",
+          "      └─TableFullScan_12 10000.00 cop[tikv] table:t1 keep order:true, stats:pseudo"
         ]
       },
       {