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https://issues.apache.org/jira/browse/PHOENIX-1267?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14163003#comment-14163003
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jay wong commented on PHOENIX-1267:
-----------------------------------
I have a holiday in the past several days. so sorry for reply later.
I know your mean. normally the hint is more structured and a better way. I
think use hint control the small is a good point.
the small scan will be set true default when both the startkey and stopkey is
setted. if we have a order by query. and the small is true. the result will be
Infinite loop.
So I think the small scan is not only a query optimize for user. I will cause a
bug.
So I think the smallScanForbidden is needed also.
> Set scan.setSmall(true) when appropriate
> ----------------------------------------
>
> Key: PHOENIX-1267
> URL: https://issues.apache.org/jira/browse/PHOENIX-1267
> Project: Phoenix
> Issue Type: Bug
> Reporter: James Taylor
> Assignee: jay wong
> Attachments: smallscan.patch
>
>
> There's a nice optimization that has been in HBase for a while now to set a
> scan as "small". This prevents extra RPC calls, I believe. We should add a
> hint for queries that forces it to be set/not set, and make our best guess on
> when it should default to true.
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