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https://issues.apache.org/jira/browse/HBASE-17599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15853719#comment-15853719
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Duo Zhang commented on HBASE-17599:
-----------------------------------
So here we need two 'partial' flags? One is to indicate that this row is a
partial row, another is to indicate that the returned Result has not reached
the batch limit yet?
{quote}
/**
* Whether or not the result is a partial result. Partial results contain a
subset of the cells
* for a row and should be combined with a result representing the remaining
cells in that row to
* form a complete (non-partial) result.
* @return Whether or not the result is a partial result
*/
public boolean isPartial() {
return partial;
}
{quote}
This is the comment of isPartial, I do not see any batch related explainations?
And for example, we have a row with 100 cells. If we set batch to 10, and we
return 3 cells at the first time, it will be marked as partial. And the second
we return 10 cells, it will not be marked as partial? I do not think this is
useful...
Thanks.
> 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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