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https://issues.apache.org/jira/browse/PHOENIX-4611?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16368018#comment-16368018
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James Taylor commented on PHOENIX-4611:
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bq. BTW, do we have any test facility that checks an unordered result-set?
It'll be useful for such tests.
See BaseTest.assertValuesEqualsResultSet()
> Not nullable column impact on join query plans
> ----------------------------------------------
>
> Key: PHOENIX-4611
> URL: https://issues.apache.org/jira/browse/PHOENIX-4611
> Project: Phoenix
> Issue Type: Bug
> Reporter: James Taylor
> Priority: Major
>
> With PHOENIX-2566, there's a subtle change in projected tables in that a
> column may end up being not nullable where as before it was nullable when the
> family name is not null. I've kept the old behavior with
> [this|https://git-wip-us.apache.org/repos/asf?p=phoenix.git;a=blobdiff;f=phoenix-core/src/main/java/org/apache/phoenix/compile/TupleProjectionCompiler.java;h=fccded2a896855a2a01d727b992f954a1d3fa8ab;hp=d0b900c1a9c21609b89065307433a0d37b12b72a;hb=82ba1417fdd69a0ac57cbcf2f2327d4aa371bcd9;hpb=e126dd1dda5aa80e8296d3b0c84736b22b658999]
> commit, but would you mind confirming what the right thing to do is,
> [~maryannxue]?
> Without this change, the explain plan changes in
> SortMergeJoinMoreIT.testBug2894() and the assert fails. Looks like the
> compiler ends up changing the row ordering.
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