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https://issues.apache.org/jira/browse/PHOENIX-3865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16025277#comment-16025277
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Thomas D'Silva commented on PHOENIX-3865:
-----------------------------------------
+1
> 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
> Assignee: James Taylor
> Attachments: PHOENIX-3865.patch, 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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