hive 读取 map的value

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table1中的c1字段是map类型，内容如下：

{
	"id1": "11111",
	"id2": "22222",
	"id3": "33333",
	"id4": "44444",
} 

select c1['id1'],c1['id2'],c1['id3'],c1['id4'] from table1  limit 1;

结果会把11111,22222,33333,44444作为4列在一行输出