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https://issues.apache.org/jira/browse/CALCITE-1297?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde updated CALCITE-1297:
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Description:
RelBuilder does not, and should not, translate identity projects, even if they
rename fields. But when building further relational expressions (e.g. a
project) the fields should appear to have their new name.
This requires some tricky implementation. In the RelBuilder, the top RelNode on
the stack may have a particular row type (say fields (x, y, z)) yet if will
have a frame that indicates that the field names from the user's perspective
are (a, b, c).
was:RelBuilder does not translate identity projects even if they rename
fields.
> RelBuilder does not translate identity projects even if they rename fields
> --------------------------------------------------------------------------
>
> Key: CALCITE-1297
> URL: https://issues.apache.org/jira/browse/CALCITE-1297
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.8.0
> Reporter: Jark Wu
> Assignee: Julian Hyde
> Fix For: 1.9.0
>
>
> RelBuilder does not, and should not, translate identity projects, even if
> they rename fields. But when building further relational expressions (e.g. a
> project) the fields should appear to have their new name.
> This requires some tricky implementation. In the RelBuilder, the top RelNode
> on the stack may have a particular row type (say fields (x, y, z)) yet if
> will have a frame that indicates that the field names from the user's
> perspective are (a, b, c).
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