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https://issues.apache.org/jira/browse/HBASE-9283?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nick Dimiduk updated HBASE-9283:
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Attachment: 0001-HBASE-9283-Struct-trailing-null-handling.patch
I realized I don't need to push this position checking down into the DataType
implementations. This patch keeps the null extension logic localized to Struct
and StructIterator. I'll post one more version tomorrow which updates the docs.
> Struct and StructIterator should properly handle trailing nulls
> ---------------------------------------------------------------
>
> Key: HBASE-9283
> URL: https://issues.apache.org/jira/browse/HBASE-9283
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.95.2
> Reporter: Nick Dimiduk
> Assignee: Nick Dimiduk
> Fix For: 0.98.0, 0.96.0
>
> Attachments: 0001-HBASE-9283-Struct-trailing-null-handling.patch,
> 0001-HBASE-9283-Struct-trailing-null-handling.patch
>
>
> For a composite row key, Phoenix strips off trailing null columns values in
> the row key. The reason this is important is that then new nullable row key
> columns can be added to a schema without requiring any data upgrade to
> existing rows. Otherwise, adding new row key columns to the end of a schema
> becomes extremely cumbersome, as you'd need to delete all existing rows and
> add them back with a row key that includes a null value.
> Rather than Phoenix needing to modify the iteration code everywhere (as
> [~ndimiduk] outlined here:
> https://issues.apache.org/jira/browse/HBASE-8693?focusedCommentId=13744499&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13744499),
> it'd be better if StructIterator handled this out-of-the-box. Otherwise, if
> Phoenix has to specialize this, we'd lose the interop piece which is the
> justification for switching our type system to this new one in the first
> place.
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