Github user tzolov commented on the pull request:
https://github.com/apache/incubator-hawq/pull/302#issuecomment-179344304
In the last commit(s):
* Added tests to cover corner cases like malformed json records or
compressed input files. The _combined_ test coverage is > 95%. @hornn is there
an integration tests/environment to itest PXF plugins?
* Improved handling of malformed json records/fields. If the json record is
not parsable the Resolver will produce a row with empty fields. If a field in
the record is missing then an empty db field is created.
* Factored out the column metadata computation logic and data in a
dedicated `ColumnDescriptorCache` class. Now the cached descriptor metadata is
created only once inside the `JsonResolver` constructor. Previously it use to
be re-computed on each `JsonResolver.getFields()` method call.
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