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https://issues.apache.org/jira/browse/HUDI-3974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HUDI-3974:
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Labels: pull-request-available (was: )
> Fix upgrade step wrt precombine field
> -------------------------------------
>
> Key: HUDI-3974
> URL: https://issues.apache.org/jira/browse/HUDI-3974
> Project: Apache Hudi
> Issue Type: Bug
> Reporter: Ethan Guo
> Assignee: Ethan Guo
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 0.11.0
>
>
> This is related to HUDI-3972
> Details about the bug: if someone is not explicitly setting preCombine field,
> hudi still falls backs to the default value of "ts" and this goes into
> hoodie.properties as well. So, when reading MOR table, since we are
> projecting just the required columns, we also add preCombine field to it and
> if the original table does not have "ts", basic read fails (even if there are
> no log files, but just base files in MOR).
> For the upgrade step, we need to update the preCombine field in the
> hoodie.properties. If the user does not set the preCombine field, it should
> be removed from the hoodie.properties; if the users sets the field, it should
> be updated in the hoodie.properties.
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