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https://issues.apache.org/jira/browse/CALCITE-1555?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde updated CALCITE-1555:
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Fix Version/s: 1.11.0
> Improve RelNode validation
> --------------------------
>
> Key: CALCITE-1555
> URL: https://issues.apache.org/jira/browse/CALCITE-1555
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
> Fix For: 1.11.0
>
>
> Improve {{RelNode}} validation by:
> * adding a context to the {{RelNode.isValid}} method;
> * enabling the {{Join.isValid}} method (it was previously renamed to
> {{isValid_}}, thus disabled).
> The context to {{isValid}} will allow the validator to deduce what
> correlation variables are available (namely, those set by a {{RelNode}}
> between this one and the root). The context is optional; if null, the
> {{isValid}} method does the best it can.
> {{RexInputRef}} s in the condition of a null-generating side of an outer join
> currently may be nullable when they should not be; the row type in the
> namespace is currently made nullable when actually only particular uses of
> the namespace should be nullable. We introduce {{class ScopeChild}} to hold
> the ordinal, row type and nullability of a use of a namespace.
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