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https://issues.apache.org/jira/browse/HUDI-631?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yixue Zhu updated HUDI-631:
---------------------------
Description:
The usage of utility function
https://github.com/apache/hudi/blob/6a0aa9a645d11ed7b50e18aa0563dafcd9d145f7/hudi-common/src/main/java/org/apache/hudi/avro/HoodieAvroUtils.java#L258
does not handle schema evolution such as optional fields removal (from new
schema).
There are example usage cases:
A typical schema evolution like changing a field type would require one to add
a new field with new type, then once old data no longer is no longer used, or
new field is backfilled, old field can be dropped.
Or
A field which is no longer needed.
The schema evolution check, which was implemented in HUDI-741, would hinder
this kind of usage.
was:
The utility function
[HoodieAvroUtils.rewrite|https://github.com/apache/incubator-hudi/blob/5b7bb142dc6712c41fd8ada208ab3186369431f9/hudi-common/src/main/java/org/apache/hudi/common/util/HoodieAvroUtils.java#L205]
does not handle schema evolution such as optional fields removal (from new
schema).
The schema evolution check was implemented in HUDI-741.
> HoodieAvroUtils.rewrite does not handle schema change such as optional fields
> removal
> -------------------------------------------------------------------------------------
>
> Key: HUDI-631
> URL: https://issues.apache.org/jira/browse/HUDI-631
> Project: Apache Hudi
> Issue Type: Bug
> Components: Common Core
> Reporter: Yixue Zhu
> Priority: Major
>
> The usage of utility function
> https://github.com/apache/hudi/blob/6a0aa9a645d11ed7b50e18aa0563dafcd9d145f7/hudi-common/src/main/java/org/apache/hudi/avro/HoodieAvroUtils.java#L258
> does not handle schema evolution such as optional fields removal (from new
> schema).
> There are example usage cases:
> A typical schema evolution like changing a field type would require one to
> add a new field with new type, then once old data no longer is no longer
> used, or new field is backfilled, old field can be dropped.
> Or
> A field which is no longer needed.
> The schema evolution check, which was implemented in HUDI-741, would hinder
> this kind of usage.
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