!plugin app install - "byzer-objectstore-cos-3.3"
!plugin app remove "byzer-objectstore-cos-3.3"
load FS.`cosn://xxxx-xxxx/test/a.parquet`
where `fs.cosn.impl`="org.apache.hadoop.fs.CosFileSystem"
and `fs.AbstractFileSystem.cosn.impl`="org.apache.hadoop.fs.CosN"
and `fs.cosn.bucket.endpoint_suffix`="cos.ap-xxx.myqcloud.com"
and `fs.cosn.userinfo.secretId`="xxxx"
and `fs.cosn.userinfo.secretKey`="xxxxx"
and `fs.cosn.tmp.dir`="/tmp/hadoop_cos"
and implClass="parquet" as output;