[
https://issues.apache.org/jira/browse/BEAM-11460?focusedWorklogId=524697&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-524697
]
ASF GitHub Bot logged work on BEAM-11460:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 15/Dec/20 20:40
Start Date: 15/Dec/20 20:40
Worklog Time Spent: 10m
Work Description: anantdamle opened a new pull request #13554:
URL: https://github.com/apache/beam/pull/13554
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](https://beam.apache.org/releases/javadoc/2.26.0/org/apache/beam/sdk/io/AvroIO.html)
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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Issue Time Tracking
-------------------
Worklog Id: (was: 524697)
Remaining Estimate: 335h 50m (was: 336h)
Time Spent: 10m
> Support reading Parquet files with unknown schema
> -------------------------------------------------
>
> Key: BEAM-11460
> URL: https://issues.apache.org/jira/browse/BEAM-11460
> Project: Beam
> Issue Type: New Feature
> Components: io-java-parquet
> Reporter: Anant Damle
> Priority: P1
> Labels: Parquet
> Fix For: 2.27.0
>
> Original Estimate: 336h
> Time Spent: 10m
> Remaining Estimate: 335h 50m
>
> 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.
> AvroIO supports reading unknow schema files using a parse function
> (https://beam.apache.org/releases/javadoc/2.26.0/org/apache/beam/sdk/io/AvroIO.html)
> {{#parseGenericRecords(SerializableFunction<GenericRecord,T>)}}
> Supporting this is simple. and requires minimal changes to the ParquetIO
> surface.
>
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