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From "James Taylor (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PHOENIX-3865) IS NULL does not return correct results when first column family not filtered against
Date Thu, 25 May 2017 18:01:04 GMT

     [ https://issues.apache.org/jira/browse/PHOENIX-3865?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

James Taylor updated PHOENIX-3865:
----------------------------------
    Summary: IS NULL does not return correct results when first column family not filtered
against  (was: IS NULL does not return results when STORE_NULLS, and ONE_CELL_PER_COLUMN is
set on IMMUTABLE ROWS)

> IS NULL does not return correct results when first column family not filtered against
> -------------------------------------------------------------------------------------
>
>                 Key: PHOENIX-3865
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-3865
>             Project: Phoenix
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>         Attachments: PHOENIX-3865-wip.patch
>
>
> I'm using poor a poor man's method for sampling. In the following table, I write a non-null
value to COLB with a probability of 0.001.
> {code}
> create table test (mykey integer not null primary key, A.COLA integer, B.COLB integer)
IMMUTABLE_ROWS=true, STORE_NULL=false, IMMUTABLE_STORAGE_SCHEME = ONE_CELL_PER_COLUMN, DISABLE_WAL=true
> {code}
> Then: 
> {code}
> 0: jdbc:phoenix:localhost> select count(*) from test;
> +-----------+
> | COUNT(1)  |
> +-----------+
> | 10000000  |
> +-----------+
> 1 row selected (8.95 seconds)
> 0: jdbc:phoenix:localhost> select count(*) from test where B.COLB is not null;
> +-----------+
> | COUNT(1)  |
> +-----------+
> | 10054     |
> +-----------+
> 1 row selected (0.023 seconds)
> 0: jdbc:phoenix:localhost> select count(*) from test where B.COLB is null;
> +-----------+
> | COUNT(1)  |
> +-----------+
> | 0         |
> +-----------+
> 1 row selected (0.022 seconds)
> {code}
> Last statement should have returned 10000000-10054 = 9989946 rows.



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