[
https://issues.apache.org/jira/browse/PHOENIX-4382?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16299300#comment-16299300
]
James Taylor commented on PHOENIX-4382:
---------------------------------------
I'm still a little bit confused. The only variable length columns are: VARCHAR
and DECIMAL neither of which would ever contain a zero byte. Both SMALLINT and
BIGINT are fixed length. Are we using bytes [0,1] as an indication of a null
value for fixed length types? We're not basing the determination of a column
value being null from the current and next offset (in the old scheme)?
> Immutable table variable length column values starting with separator byte
> return null in query results
> -------------------------------------------------------------------------------------------------------
>
> Key: PHOENIX-4382
> URL: https://issues.apache.org/jira/browse/PHOENIX-4382
> Project: Phoenix
> Issue Type: Bug
> Affects Versions: 4.14.0
> Reporter: Vincent Poon
> Assignee: Vincent Poon
> Attachments: PHOENIX-4382.v1.master.patch,
> PHOENIX-4382.v2.master.patch, UpsertBigValuesIT.java
>
>
> For immutable tables, upsert of some values like Short.MAX_VALUE results in a
> null value in query resultsets. Mutable tables are not affected. I tried
> with BigInt and got the same problem.
> For Short, the breaking point seems to be 32512.
> This is happening because of the way we serialize nulls. For nulls, we write
> out [separatorByte, #_of_nulls]. However, some data values, like
> Short.MAX_VALUE, start with separatorByte, we can't distinguish between a
> null and these values. Currently the code assumes it's a null when it sees a
> leading separatorByte, hence the incorrect query results.
> See attached test - testShort() , testBigInt()
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
