PHOENIX-4906 has the best explanation I think.

Created  PHOENIX-6587 <https://issues.apache.org/jira/browse/PHOENIX-6587> to
disallow this scenario.

On Wed, Nov 3, 2021 at 10:02 AM Jan Van Besien <janvanbes...@gmail.com>
wrote:

> Thanks for confirming. Do you have a reference to the most relevant JIRA
> ticket? I found PHOENIX-4906 but I'm not sure if that's the most relevant
> one.
>
> Jan
>
> On Tue, 2 Nov 2021 at 22:47, Istvan Toth <st...@cloudera.com> wrote:
>
>> It's a known issue.
>> A region may only have rows from a single bucket in it, and it is not
>> hard to get into the state that you describe.
>> We have at least one JIRA open for it.
>> Phoenix will automatically pre-split according to the salt buckets if you
>> don't explicitly specify the splits in the create table statement.
>>
>> On Tue, Nov 2, 2021 at 2:34 PM Jan Van Besien <janvanbes...@gmail.com>
>> wrote:
>>
>>> Phoenix queries seem to return incorrect results when defining tables
>>> with more salt buckets than regions. Is this a known problem or am I
>>> misunderstanding something?
>>>
>>> I tested with phoenix 5.1.2 and hbase 2.1.4.
>>>
>>> Create a table with 4 salt buckets and 2 initial regions and add some
>>> values:
>>>
>>> create table JVB (ID BIGINT NOT NULL, NAME VARCHAR, CONSTRAINT pk
>>> PRIMARY KEY (ID)) SALT_BUCKETS = 4 SPLIT ON (5);
>>> upsert into JVB values (0, 'A');
>>> upsert into JVB values (1, 'A');
>>> upsert into JVB values (2, 'A');
>>> upsert into JVB values (3, 'A');
>>> upsert into JVB values (4, 'A');
>>> upsert into JVB values (5, 'A');
>>> upsert into JVB values (6, 'A');
>>> upsert into JVB values (7, 'A');
>>> upsert into JVB values (8, 'A');
>>> upsert into JVB values (9, 'A');
>>>
>>> Example queries that are incorrect:
>>>
>>> 0: jdbc:phoenix:> select * from JVB where ID < 4;
>>> +----+------+
>>> | ID | NAME |
>>> +----+------+
>>> | 3  | A    |
>>> +----+------+
>>> 1 row selected (0.011 seconds)
>>> 0: jdbc:phoenix:> select * from JVB where ID > 4;
>>> +----+------+
>>> | ID | NAME |
>>> +----+------+
>>> | 7  | A    |
>>> | 2  | A    |
>>> | 6  | A    |
>>> | 1  | A    |
>>> | 5  | A    |
>>> | 9  | A    |
>>> | 0  | A    |
>>> | 4  | A    |
>>> | 8  | A    |
>>> +----+------+
>>> 9 rows selected (0.012 seconds)
>>>
>>> Thanks,
>>> Jan
>>>
>>
>>
>> --
>> *István Tóth* | Staff Software Engineer
>> st...@cloudera.com <https://www.cloudera.com>
>> [image: Cloudera] <https://www.cloudera.com/>
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>> ------------------------------
>>
>

-- 
*István Tóth* | Staff Software Engineer
st...@cloudera.com <https://www.cloudera.com>
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