ddl: fix rename table across database

cdc/model/sink.go

@@ -1092,6 +1092,15 @@ func (d *DDLEvent) FromJobWithArgs(
 	case model.ActionDropView:
 		d.Query = fmt.Sprintf("DROP VIEW `%s`.`%s`",
 			d.TableInfo.TableName.Schema, d.TableInfo.TableName.Table)
+	case model.ActionRenameTable:
+		// Note: preTableInfo may not be accurate for rename table.
+		// after pr: https://github.com/pingcap/tidb/pull/43341,
+		// assume there is a table `test.t` and a ddl: `rename table t to test2.t;`, and its commit ts is `100`.
+		// if you get a ddl snapshot at ts `99`, table `t` is already in `test2`.
+		// so preTableInfo.TableName.Schema will also be `test2`.
+		d.Query = fmt.Sprintf("RENAME TABLE `%s`.`%s` TO `%s`.`%s`",
+			job.InvolvingSchemaInfo[0].Database, job.InvolvingSchemaInfo[0].Table,
+			tableInfo.TableName.Schema, tableInfo.TableName.Table)
 	case model.ActionRenameTables:
 		oldTableName := preTableInfo.Name.O
 		newTableName := tableInfo.Name.O

tests/integration_tests/ddl_manager/data/prepare.sql

@@ -113,7 +113,7 @@ CREATE TABLE t1 (
                     col0 INT NOT NULL
 );
 
-RENAME TABLE `cross_db_1`.`t1` TO `cross_db_2`.`t1`;
+RENAME TABLE `t1` TO `cross_db_2`.`t1`;
 
 CREATE TABLE `cross_db_1`.`t2` like `cross_db_2`.`t1`;