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From "Phil Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17599) Also set the partial flag of Result to true if we reach the batch limit
Date Mon, 06 Feb 2017 09:32:41 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15853749#comment-15853749
] 

Phil Yang commented on HBASE-17599:
-----------------------------------

And we should do some work at server to judge if a Cell is the last one of this row or not.
Now we can only say it must be the last or maybe not be the last, because when some limit
reached we just return what we read. This work is not easy because we may have filter or read
some of qualifiers.

> Also set the partial flag of Result to true if we reach the batch limit
> -----------------------------------------------------------------------
>
>                 Key: HBASE-17599
>                 URL: https://issues.apache.org/jira/browse/HBASE-17599
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Client, scan
>    Affects Versions: 2.0.0, 1.4.0
>            Reporter: Duo Zhang
>             Fix For: 2.0.0, 1.4.0
>
>         Attachments: HBASE-17599.patch
>
>
> For now if we set scan.allowPartial(true), the partial result returned will have the
partial flag set to true. But for scan.setBatch(xx), the partial result returned will not
be marked as partial.
> This is an Incompatible change, indeed. But I do not think it will introduce any issues
as we just provide more informations to client. The old partial flag for batched scan is always
false so I do not think anyone can make use of it.
> This is very important for the limited scan to support partial results from server. If
we get a Result which partial flag is false then we know we get the whole row. Otherwise we
need to fetch one more row to see if the row key is changed which causes the logic to be more
complicated.



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