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https://issues.apache.org/jira/browse/DRILL-1311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14151881#comment-14151881
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Jason Altekruse commented on DRILL-1311:
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The case where the view only references a & b should be fixed by project
pushdown. I will write a quick test to confirm. The second one is a bit
puzzling to me as it does not look like there should be a schema change.
> Hash join does not support schema changes error
> -----------------------------------------------
>
> Key: DRILL-1311
> URL: https://issues.apache.org/jira/browse/DRILL-1311
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Neeraja
> Assignee: Ramana Inukonda Nagaraj
> Fix For: 0.6.0
>
>
> - Create a directory with a couple of JSON files. One with columns a,b and
> second with columns a,b,c.
> - a & b attributes have same data types across both the files
> - create a view by selecting columns a, b from the directory
> - Join the view with any other table
> An error shows up indicating that 'Hash join does not support schema changes'.
> There is a schema change across the files with a new element being added,
> however given that specific columns a,b are selected in the view, expect that
> query works fine.
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