This is an automated cherry-pick of pingcap#53981

Signed-off-by: ti-chi-bot <[email protected]>

Author: qw4990

cmd/explaintest/r/explain_generate_column_substitute.result

@@ -600,6 +600,7 @@ begin;
 delete from t2 where c_decimal > c_double/2 order by c_int, c_str, c_double, c_decimal limit 1;
 desc format='brief' select t2.c_enum from t2,t1 where t1.c_int - 1 = t2.c_int - 1 order  by t2.c_enum;
 id	estRows	task	access object	operator info
+<<<<<<< HEAD:cmd/explaintest/r/explain_generate_column_substitute.result
 Sort	12487.50	root		test.t2.c_enum
 └─HashJoin	12487.50	root		inner join, equal:[eq(minus(test.t1.c_int, 1), minus(test.t2.c_int, 1))]
   ├─IndexReader(Build)	9990.00	root		index:IndexFullScan
@@ -609,6 +610,17 @@ Sort	12487.50	root		test.t2.c_enum
       └─Selection	8000.00	root		not(isnull(minus(test.t2.c_int, 1)))
         └─TableReader	10000.00	root		data:TableFullScan
           └─TableFullScan	10000.00	cop[tikv]	table:t2	keep order:false, stats:pseudo
+=======
+Sort	10000.00	root		explain_generate_column_substitute.t2.c_enum
+└─HashJoin	10000.00	root		inner join, equal:[eq(minus(explain_generate_column_substitute.t1.c_int, 1), minus(explain_generate_column_substitute.t2.c_int, 1))]
+  ├─Selection(Build)	8000.00	root		not(isnull(minus(explain_generate_column_substitute.t2.c_int, 1)))
+  │ └─Projection	10000.00	root		explain_generate_column_substitute.t2.c_enum, minus(explain_generate_column_substitute.t2.c_int, 1), explain_generate_column_substitute.t2._tidb_rowid
+  │   └─UnionScan	10000.00	root		
+  │     └─TableReader	10000.00	root		data:TableFullScan
+  │       └─TableFullScan	10000.00	cop[tikv]	table:t2	keep order:false, stats:pseudo
+  └─IndexReader(Probe)	9990.00	root		index:IndexFullScan
+    └─IndexFullScan	9990.00	cop[tikv]	table:t1, index:expression_index_2(`c_int` - 1)	keep order:false, stats:pseudo
+>>>>>>> d53b34412f0 (planner: prevent pushing Projection with virtual columns down to UnionScan (#53981)):tests/integrationtest/r/explain_generate_column_substitute.result
 select t2.c_enum from t2,t1 where t1.c_int - 1 = t2.c_int - 1 order  by t2.c_enum;
 c_enum
 orange