[BEAM-11460] Support reading Parquet files with unknown schema #13616
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…arseFiles<T>` implementation for supporting files with unknown schema.
1. Fix Javadoc example by using consistent words 1. Other indentation and space fixes
4 tasks
Merge BEAM 2.27.0 into anantdamle fork
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@aromanenko-dev @iemejia have made all the requested changes. Kindly review. |
iemejia
approved these changes
Dec 25, 2020
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LGTM Thanks @anantdamle !
If you feel motivated to do one easy contribution, documenting and enabling ParquetIO to use Beam schemas (as AvroIO does) could be interesting. Feel free to take this issue if you feel motivated
https://issues.apache.org/jira/browse/BEAM-11526
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Data engineers encounter times when schema of Parquet file is unknown at the time of writing the pipeline or multiple schema may be present in different files. Reading Parquet files using ParquetIO requires providing an Avro (equivalent) schema, Many a times its not possible to know the schema of the Parquet files.
On the other hand AvroIO supports reading unknow schema files by providing a parse function :
#parseGenericRecords(SerializableFunction<GenericRecord,T>)Supporting this functionality in ParquetIO is simple and requires minimal changes to the ParquetIO surface.
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ParquetIOTestCHANGES.mdwith noteworthy changes.created instead of PR/13554 due to change in source branch.
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