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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PHOENIX-3865) IS NULL does not return results when STORE_NULLS, and ONE_CELL_PER_COLUMN is set on IMMUTABLE ROWS
Date Thu, 18 May 2017 05:53:04 GMT
Lars Hofhansl created PHOENIX-3865:
--------------------------------------

             Summary: IS NULL does not return results when STORE_NULLS, and ONE_CELL_PER_COLUMN
is set on IMMUTABLE ROWS
                 Key: PHOENIX-3865
                 URL: https://issues.apache.org/jira/browse/PHOENIX-3865
             Project: Phoenix
          Issue Type: Bug
            Reporter: Lars Hofhansl


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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