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https://issues.apache.org/jira/browse/PHOENIX-5571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16979511#comment-16979511
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Chinmay Kulkarni commented on PHOENIX-5571:
-------------------------------------------
[~xucang] is this similar to what you were observing the other day?
> Incorrect "IS NULL" handling
> ----------------------------
>
> Key: PHOENIX-5571
> URL: https://issues.apache.org/jira/browse/PHOENIX-5571
> Project: Phoenix
> Issue Type: Bug
> Affects Versions: 4.14.2
> Reporter: Alex Batyrshin
> Priority: Major
>
> {code:java}
> 0: jdbc:phoenix:> SELECT count(*) FROM STG.DAILY_DOCS_20190701;
> +-----------+
> | COUNT(1) |
> +-----------+
> | 242624 |
> +-----------+
> 0: jdbc:phoenix:> SELECT count(*) FROM STG.DAILY_DOCS_20190701 where "ts" IS
> NOT NULL;
> +-----------+
> | COUNT(1) |
> +-----------+
> | 20099 |
> +-----------+{code}
>
> This should means that count by "ts" IS NULL = 242624 - 20099 = 222525
> But Phoenix returns 0
> {code:java}
> 0: jdbc:phoenix:> SELECT count(*) FROM STG.DAILY_DOCS_20190701 where "ts" IS
> NULL;
> +-----------+
> | COUNT(1) |
> +-----------+
> | 0 |
> +-----------+ {code}
>
> But if we add some additional AND condition we could get count:
> {code:java}
> 0: jdbc:phoenix:> SELECT count(*) FROM STG.DAILY_DOCS_20190701 where "ts" IS
> NULL AND "did" is not null;
> +-----------+
> | COUNT(1) |
> +-----------+
> | 222525 |
> +-----------+ {code}
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