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https://issues.apache.org/jira/browse/VXQUERY-156?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Preston Carman reassigned VXQUERY-156:
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Assignee: Preston Carman
> child expression for multiple path steps
> ----------------------------------------
>
> Key: VXQUERY-156
> URL: https://issues.apache.org/jira/browse/VXQUERY-156
> Project: VXQuery
> Issue Type: Improvement
> Reporter: Preston Carman
> Assignee: Preston Carman
>
> Currently the child expression takes one path step argument. When multiple
> child path expressions are in sequence, the operators materialize each child
> result between each operator.
> An optimization would be to allow a single child expression to take multiple
> arguments. The result would be a single expression that can produce the final
> child results without the in between materialized.
> Single argument functions: ChildPathStepScalarEvaluator or
> ChildPathStepUnnestingEvaluator
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