Github user zhangh43 commented on the pull request:
https://github.com/apache/incubator-hawq/pull/679#issuecomment-222203807
The main hawq register steps are as follows:
get_files_in_hdfs(filepath)
check_parquet_format(options, files)
firstsegno = get_metadata_from_database(options, databasename, seg_name)
move_files_in_hdfs(options, databasename, tablename, files, firstsegno,
True)
insert_metadata_into_database(options, databasename, tablename, seg_name,
firstsegno, sizes)
I have a question what will happen when one of some steps fails. E.g. hdfs
files have been moved, but insert metadata failed, should we restore the moved
data?
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