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https://issues.apache.org/jira/browse/PHOENIX-1580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14393292#comment-14393292
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Alicia Ying Shu commented on PHOENIX-1580:
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[~jamestaylor] iterators.explain(steps) shows different plan steps than explain
by looping through plans. It shows plan steps at thread level I think. There
will be a lot of repeated information. For example: select * from t1 union all
select * from t2; instead of showing "Union All 2 queries", it will show "
Union All 8 queries". So we should keep looping plans in UnionPlan.explain().
> Support UNION ALL
> -----------------
>
> Key: PHOENIX-1580
> URL: https://issues.apache.org/jira/browse/PHOENIX-1580
> Project: Phoenix
> Issue Type: Bug
> Reporter: Alicia Ying Shu
> Assignee: Alicia Ying Shu
> Attachments: PHOENIX-1580-grammar.patch, Phoenix-1580-v1.patch,
> Phoenix-1580-v2.patch, Phoenix-1580-v3.patch, Phoenix-1580-v4.patch,
> Phoenix-1580-v5.patch, Phoenix-1580-v6.patch, phoenix-1580-v1-wipe.patch,
> phoenix-1580.patch, unionall-wipe.patch
>
>
> Select * from T1
> UNION ALL
> Select * from T2
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