ddl: fix none info of alter table placement

executor/executor_test.go

@@ -587,6 +587,41 @@ func (s *testSuiteP2) TestAdminShowDDLJobs(c *C) {
 	c.Assert(row[9], Equals, "<nil>")
 }
 
+func (s *testSuiteP2) TestAdminShowDDLJobsInfo(c *C) {
+	tk := testkit.NewTestKit(c, s.store)
+	tk.MustExec("create database if not exists test_admin_show_ddl_jobs")
+	defer tk.MustExec("drop database if exists test_admin_show_ddl_jobs")
+	tk.MustExec("use test_admin_show_ddl_jobs")
+	tk.MustExec("drop table if exists t, t1;")
+	tk.MustExec("create table t (a int);")
+	tk.MustExec("create table t1 (a int);")
+
+	// Test for issue: https://github.com/pingcap/tidb/issues/29915
+	tk.MustExec("drop placement policy if exists x;")
+	tk.MustExec("create placement policy x followers=4;")
+	tk.MustExec("alter table t placement policy x;")
+	c.Assert(tk.MustQuery("admin show ddl jobs 1").Rows()[0][3], Equals, "alter table placement")
+
+	tk.MustExec("rename table t to tt, t1 to tt1")
+	c.Assert(tk.MustQuery("admin show ddl jobs 1").Rows()[0][3], Equals, "rename tables")
+
+	tk.MustExec("create table tt2 (c int) PARTITION BY RANGE (c) " +
+		"(PARTITION p0 VALUES LESS THAN (6)," +
+		"PARTITION p1 VALUES LESS THAN (11)," +
+		"PARTITION p2 VALUES LESS THAN (16)," +
+		"PARTITION p3 VALUES LESS THAN (21));")
+	tk.MustExec("alter table tt2 partition p0 " +
+		"PRIMARY_REGION=\"cn-east-1\" " +
+		"REGIONS=\"cn-east-1, cn-east-2\" " +
+		"FOLLOWERS=2 ")
+	c.Assert(tk.MustQuery("admin show ddl jobs 1").Rows()[0][3], Equals, "alter table partition policy")
+
+	tk.MustExec("alter table tt1 cache")
+	c.Assert(tk.MustQuery("admin show ddl jobs 1").Rows()[0][3], Equals, "alter table cache")
+	tk.MustExec("alter table tt1 nocache")
+	c.Assert(tk.MustQuery("admin show ddl jobs 1").Rows()[0][3], Equals, "alter table nocache")
+}
+
 func (s *testSuiteP2) TestAdminChecksumOfPartitionedTable(c *C) {
 	tk := testkit.NewTestKit(c, s.store)
 	tk.MustExec("USE test;")

parser/model/ddl.go

@@ -111,6 +111,7 @@ var actionMap = map[ActionType]string{
 	ActionModifyColumn:                  "modify column",
 	ActionRebaseAutoID:                  "rebase auto_increment ID",
 	ActionRenameTable:                   "rename table",
+	ActionRenameTables:                  "rename tables",
 	ActionSetDefaultValue:               "set default value",
 	ActionShardRowID:                    "shard row ID",
 	ActionModifyTableComment:            "modify table comment",
@@ -144,12 +145,15 @@ var actionMap = map[ActionType]string{
 	ActionAlterCheckConstraint:          "alter check constraint",
 	ActionDropIndexes:                   "drop multi-indexes",
 	ActionAlterTableAttributes:          "alter table attributes",
+	ActionAlterTablePartitionPolicy:     "alter table partition policy",
 	ActionAlterTablePartitionAttributes: "alter table partition attributes",
 	ActionCreatePlacementPolicy:         "create placement policy",
 	ActionAlterPlacementPolicy:          "alter placement policy",
 	ActionDropPlacementPolicy:           "drop placement policy",
 	ActionModifySchemaDefaultPlacement:  "modify schema default placement",
-	ActionAlterCacheTable:               "alter cache table",
+	ActionAlterTablePlacement:           "alter table placement",
+	ActionAlterCacheTable:               "alter table cache",
+	ActionAlterNoCacheTable:             "alter table nocache",
 	ActionAlterTableStatsOptions:        "alter table statistics options",
 
 	// `ActionAlterTableAlterPartition` is removed and will never be used.

parser/model/model_test.go

@@ -284,6 +284,7 @@ func TestString(t *testing.T) {
 		{ActionTruncateTable, "truncate table"},
 		{ActionModifyColumn, "modify column"},
 		{ActionRenameTable, "rename table"},
+		{ActionRenameTables, "rename tables"},
 		{ActionSetDefaultValue, "set default value"},
 		{ActionCreateSchema, "create schema"},
 		{ActionDropSchema, "drop schema"},
@@ -297,6 +298,9 @@ func TestString(t *testing.T) {
 		{ActionDropColumns, "drop multi-columns"},
 		{ActionModifySchemaCharsetAndCollate, "modify schema charset and collate"},
 		{ActionDropIndexes, "drop multi-indexes"},
+		{ActionAlterTablePlacement, "alter table placement"},
+		{ActionAlterTablePartitionPolicy, "alter table partition policy"},
+		{ActionAlterNoCacheTable, "alter no cache table"},
 	}
 
 	for _, v := range acts {