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https://issues.apache.org/jira/browse/PHOENIX-3917?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16043842#comment-16043842
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Biju Nair commented on PHOENIX-3917:
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Hi [~giacomotaylor], For a query like {{SELECT A_ID, A_DATA FROM TABLE}} the
projected columns families are not added to the {{scan}} until
[here|https://github.com/apache/phoenix/blob/e7629ca39224e7cbc49e8a7740ed96877a16df76/phoenix-core/src/main/java/org/apache/phoenix/compile/ProjectionCompiler.java#L493-L501]
and that being the reason for moving the size calculation logic after the
{{if}} condition. With out the move the estimated size of the projection is
returned as zero for the queries mentioned in the description.
> RowProjector#getEstimatedRowByteSize() returns incorrect value
> --------------------------------------------------------------
>
> Key: PHOENIX-3917
> URL: https://issues.apache.org/jira/browse/PHOENIX-3917
> Project: Phoenix
> Issue Type: Bug
> Reporter: Biju Nair
> Assignee: Biju Nair
> Priority: Minor
> Attachments: PHOENIX-3917_v2.patch
>
>
> {{queryPlan..getProjector().getEstimatedRowByteSize()}} returns "0" for a
> query {{SELECT A_ID FROM TABLE}} where {{A_ID}} is Primary Key. Same is the
> case for the query {{SELECT A_ID, A_DATA FROM TABLE}} where {{A_DATA}} is a
> non key column. Assuming that the method is meant to return the estimated
> number of bytes from the query projection the returned value of 0 is
> incorrect.
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