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https://issues.apache.org/jira/browse/HUDI-2268?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17398564#comment-17398564
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ASF GitHub Bot commented on HUDI-2268:
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yihua opened a new pull request #3470:
URL: https://github.com/apache/hudi/pull/3470
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> Upgrade hoodie table to 0.9.0
> -----------------------------
>
> Key: HUDI-2268
> URL: https://issues.apache.org/jira/browse/HUDI-2268
> Project: Apache Hudi
> Issue Type: Sub-task
> Components: Usability
> Reporter: sivabalan narayanan
> Assignee: sivabalan narayanan
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.9.0
>
>
> Wrt upgrading/downgrading hoodie.properties, here is what we can go.
> Add a new table version, 2.
> Add an upgrade step:
> before every write operation.
> Check if existing hoodie.props is in an older version. If yes, perform
> upgrade step to version2 (either from 0 to 2 or from 1 to 2). This
> essentially means that we need to add new properties pertaining to sql dml to
> hoodie.properties.
> Things to watch out for:
> for some operations, not all props might be set by the user. So, we might
> need to throw an exception. (record key field, partition path field, key gen
> prop, precombine field).
> We need to fetch latest table schema since the incoming df could have partial
> cols.
>
> Downgrade step:
> hoodie.properties will have some additional properties. Should not cause any
> harm. All we need to do is to downgrade the table version to target version
> and not touch any of the props.
>
>
>
>
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