是否可以交换默认分区？

Question

我正在使用HAWQ 2.3.0版本。我想在两个表之间交换默认分区，但出现以下错误：

错误：无法交换表“ sales_stg”，因为它具有子表

使用的代码：-

Create table sales ( sales_id integer,LOADDATE timestamp with time zone DEFAULT now()) WITH (APPENDONLY=TRUE, OIDS=FALSE) distributed by(sales_id) Partition by RANGE(loaddate) (DEFAULT PARTITION others);

Create table sales_stg (sales_id integer,LOADDATE timestamp with time zone DEFAULT now()) WITH (APPENDONLY=TRUE, OIDS=FALSE) distributed by(sales_id) Partition by RANGE(loaddate) (DEFAULT PARTITION others);

Alter table sales exchange partition others with table sales_stg;