diff --git a/planner/core/integration_test.go b/planner/core/integration_test.go
index 98205722cb77a..9167de7a0ff43 100644
--- a/planner/core/integration_test.go
+++ b/planner/core/integration_test.go
@@ -1358,3 +1358,60 @@ func (s *testIntegrationSuite) TestIssue19926(c *C) {
 	tk.MustExec("create definer='root'@'localhost' view v as\nselect \nconcat(`ta`.`status`,`tb`.`status`) AS `status`, \n`ta`.`id` AS `id`  from (`ta` join `tb`) \nwhere (`ta`.`id` = `tb`.`id`);")
 	tk.MustQuery("SELECT tc.status,v.id FROM tc, v WHERE tc.id = v.id AND v.status = '11';").Check(testkit.Rows("1 1"))
 }
+
+func (s *testIntegrationSuite) TestPartitionUnionWithPPruningColumn(c *C) {
+	tk := testkit.NewTestKit(c, s.store)
+	tk.MustExec("use test")
+	tk.MustExec("drop table if exists t;")
+	tk.MustExec("CREATE TABLE `t` (\n  `fid` bigint(36) NOT NULL,\n  `oty` varchar(30) DEFAULT NULL,\n  `oid` int(11) DEFAULT NULL,\n  `pid` bigint(20) DEFAULT NULL,\n  `bid` int(11) DEFAULT NULL,\n  `r5` varchar(240) DEFAULT '',\n  PRIMARY KEY (`fid`)\n)PARTITION BY HASH( `fid` ) PARTITIONS 4;")
+
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (59, 'm',  441, 1,  2143,  'LE1264_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (135, 'm',  1121, 1,  2423,  'LE2008_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (139, 'm',  1125, 1,  2432, 'LE2005_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (143, 'm',  1129, 1,  2438,  'LE2006_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (147, 'm',  1133, 1,  2446,  'LE2014_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (167, 'm',  1178, 1,  2512,  'LE2055_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (171, 'm',  1321, 1,  2542,  'LE1006_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (179, 'm',  1466, 1,  2648,  'LE2171_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (187, 'm',  1567, 1,  2690,  'LE1293_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (57, 'm',  341, 1,  2102,  'LE1001_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (137, 'm',  1123, 1,  2427,  'LE2003_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (145, 'm',  1131, 1,  2442,  'LE2048_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (138, 'm',  1124, 1,  2429,  'LE2004_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (142, 'm',  1128, 1,  2436,  'LE2049_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (174, 'm',  1381, 1,  2602,  'LE2170_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (28, 'm',  81, 1,  2023,  'LE1009_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (60, 'm',  442, 1,  2145,  'LE1263_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (136, 'm',  1122, 1,  2425,  'LE2002_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (140, 'm',  1126, 1,  2434,  'LE2001_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (168, 'm',  1179, 1,  2514,  'LE2052_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (196, 'm',  3380, 1,  2890,  'LE1300_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (208, 'm',  3861, 1,  3150,  'LE1323_r5');")
+	tk.MustExec("INSERT INTO t (fid, oty, oid, pid, bid, r5) VALUES (432, 'm',  4060, 1,  3290,  'LE1327_r5');")
+
+	tk.MustQuery("SELECT DISTINCT t.bid, t.r5 FROM t left join t parent on parent.oid = t.pid WHERE t.oty = 'm';").Sort().Check(
+		testkit.Rows("2023 LE1009_r5",
+			"2102 LE1001_r5",
+			"2143 LE1264_r5",
+			"2145 LE1263_r5",
+			"2423 LE2008_r5",
+			"2425 LE2002_r5",
+			"2427 LE2003_r5",
+			"2429 LE2004_r5",
+			"2432 LE2005_r5",
+			"2434 LE2001_r5",
+			"2436 LE2049_r5",
+			"2438 LE2006_r5",
+			"2442 LE2048_r5",
+			"2446 LE2014_r5",
+			"2512 LE2055_r5",
+			"2514 LE2052_r5",
+			"2542 LE1006_r5",
+			"2602 LE2170_r5",
+			"2648 LE2171_r5",
+			"2690 LE1293_r5",
+			"2890 LE1300_r5",
+			"3150 LE1323_r5",
+			"3290 LE1327_r5"))
+
+}
diff --git a/planner/core/rule_partition_processor.go b/planner/core/rule_partition_processor.go
index 14bb906565071..69d0c75a7effd 100644
--- a/planner/core/rule_partition_processor.go
+++ b/planner/core/rule_partition_processor.go
@@ -827,6 +827,8 @@ func (s *partitionProcessor) makeUnionAllChildren(ds *DataSource, pi *model.Part
 			newDataSource := *ds
 			newDataSource.baseLogicalPlan = newBaseLogicalPlan(ds.SCtx(), plancodec.TypeTableScan, &newDataSource, ds.blockOffset)
 			newDataSource.schema = ds.schema.Clone()
+			newDataSource.Columns = make([]*model.ColumnInfo, len(ds.Columns))
+			copy(newDataSource.Columns, ds.Columns)
 			newDataSource.isPartition = true
 			newDataSource.physicalTableID = pi.Definitions[i].ID