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https://issues.apache.org/jira/browse/PHOENIX-1312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14287225#comment-14287225
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ramkrishna.s.vasudevan commented on PHOENIX-1312:
-------------------------------------------------
Going through the code for this
{code}
byte[] ecf = SchemaUtil.getEmptyColumnFamily(table);
// Project empty key value unless the column family containing
it has
// been projected in its entirety.
if (!familyMap.containsKey(ecf) || familyMap.get(ecf) != null) {
scan.addColumn(ecf, QueryConstants.EMPTY_COLUMN_BYTES);
}
{code}
You mean if there is a WHERE condition and the familyMap already has the CF
that is in the WHERE CLAUSE we don't add the default column?
> 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
>
> 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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