炸裂函数
lateral view explode 可以对数组进行炸裂；也可以对map进行炸裂
对map字段进行炸裂：lateral view explode(map字段) aa as ikey1,ivalue1;
对数组字段进行炸裂：lateral view explode(数组字段) aa as 字段1;
lateral view explode(split(regexp_replace(regexp_replace(regexp_replace(regexp_replace(regexp_replace(substring(
json字段,2,length(json字段)-2),'\\},\\{','\\}\\|\\{'),',"','\\~"'),'"',''),'\\{',''),'\\}',''),'\\|')) aa as 字段1