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From "Duo Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-17599) Use mayHaveMoreCellsInRow instead of isPartial
Date Thu, 09 Feb 2017 06:17:41 GMT

     [ https://issues.apache.org/jira/browse/HBASE-17599?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Duo Zhang updated HBASE-17599:
------------------------------
    Description: 
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 may 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.

  was:
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.


> Use mayHaveMoreCellsInRow instead of isPartial
> ----------------------------------------------
>
>                 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
>            Assignee: Duo Zhang
>             Fix For: 2.0.0, 1.4.0
>
>         Attachments: HBASE-17599-branch-1.patch, HBASE-17599.patch, HBASE-17599-v1.patch,
HBASE-17599-v2.patch, HBASE-17599-v3.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 may 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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