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https://issues.apache.org/jira/browse/HUDI-9505?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Davis Zhang updated HUDI-9505:
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Status: In Progress (was: Open)
> secondary index join change
> ---------------------------
>
> Key: HUDI-9505
> URL: https://issues.apache.org/jira/browse/HUDI-9505
> Project: Apache Hudi
> Issue Type: Bug
> Reporter: Davis Zhang
> Priority: Major
> Fix For: 1.1.0
>
>
> [HoodieTableMetadata.java|http://hoodietablemetadata.java/] index lookup API
> of SI and RLI only, input output all use HoodieData/HoodieMapData.
> Add new API as needed as the lookup of keys may only need result sets,
> instead of a map of key → result set.
>
> If it is table version 9
> Still the SI entry format is
> {{<secondary col value>_<record col value>: null}}
> hash partition by {{<secondary col value>}}
> Make sure we cover both read/write path change
>
> For table version 8 it is the same as before.
>
> Table version upgrade drop all SI.
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