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https://issues.apache.org/jira/browse/PHOENIX-1312?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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James Taylor updated PHOENIX-1312:
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Attachment: PHOENIX-1312_v2.patch
Try this patch as a start, [~ram_krish]. Here's an example of where the first
column family (i.e. the one that contains the empty key value) doesn't need to
be projected (and thus the stats for column family B should be used instead):
{code}
CREATE TABLE T (
k INTEGER PRIMARY KEY,
A.V1 VARCHAR,
B.V2 VARCHAR);
SELECT B.V2 FROM T WHERE B.V2 = 'a'
{code}
> Do not always project the empty column family
> ---------------------------------------------
>
> Key: PHOENIX-1312
> URL: https://issues.apache.org/jira/browse/PHOENIX-1312
> Project: Phoenix
> Issue Type: Bug
> Reporter: James Taylor
> Assignee: ramkrishna.s.vasudevan
> Fix For: 4.7.0
>
> Attachments: PHOENIX-1312_1.patch, PHOENIX-1312_v2.patch,
> Phoenix-1312.patch
>
>
> Often times, we don't need to, but it seems we always are. See
> MultiCfQueryExecIT.testGuidePostsForMultiCFs() where we run a query like this:
> {code}
> SELECT count(*) FROM multi_cf WHERE e.cpu_utilization IS NOT NULL
> {code}
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