需要解析的json为：
{
"_id":{
"$oid":"580db8cf8ead0e093c876a72"
}
,
"aClassId":["15397303000114"],
"iBookId":{
"$numberLong":"145"
}
,
"iCreateTime":{
"$numberLong":"1477294287"
}
,
"iEndTime":{
"$numberLong":"1477324799"
}
,
"iQuestId":{
"$numberLong":"17"
}
,
"iState":{
"$numberLong":"1"
}
,
"iTchId":{
"$numberLong":"39250"
}
,
"sQuestInfo":"{"parentId":3,"parentName":"Starter unit 2","childName":"3c"}"
}
解析代码为：
select
c.oid,
regexp_replace(b.aClassId, '"', '') as aClassId, //去掉引号 " "
c.parentId,
c.parentName,
c.childName,
c.iBookId,
c.iCreateTime,
c.iEndTime,
c.iQuestId,
c.iState,
c.iTchId
from odsdata.speaktrain_0001_teacher_homework a
lateral view json_tuple(a.json,'_id','aClassId','iBookId','iCreateTime','iEndTime','iQuestId','iState','iTchId','sQuestInfo') b as id,aClassId,iBookId,iCreateTime,iEndTime,iQuestId,iState,iTchId,sQuestInfo
lateral view json_tuple(b.id,'$oid') c as oid
lateral view json_tuple(b.iBookId,'$numberLong') c as iBookId
lateral view json_tuple(b.iCreateTime,'$numberLong') c as iCreateTime
lateral view json_tuple(b.iEndTime,'$numberLong') c as iEndTime
lateral view json_tuple(b.iQuestId,'$numberLong') c as iQuestId
lateral view json_tuple(b.iState,'$numberLong') c as iState
lateral view json_tuple(b.iTchId,'$numberLong') c as iTchId
lateral view json_tuple(b.sQuestInfo,'parentId','parentName','childName') c as parentId,parentName,childName limit 2;
