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https://issues.apache.org/jira/browse/ARROW-16819?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney updated ARROW-16819:
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Description: This is a design deficiency in {{CallFunction}}. If a function
is nullary (zero input arguments), the execution machinery has no way to
determine the output length from an empty vector of datums. We should change
{{CallFunction}} to have variants based on {{ExecBatch}} and {{ExecSpan}} (from
ARROW-16755) (was: This is a design deficiency in {{CallFunction}}. If a
function is nullary, the execution machinery has no way to determine the output
length from an empty vector of datums. We should change {{CallFunction}} to
have variants based on {{ExecBatch}} and {{ExecSpan}} (from ARROW-16755))
> [C++] arrow::compute::CallFunction needs a batch length for nullary functions
> -----------------------------------------------------------------------------
>
> Key: ARROW-16819
> URL: https://issues.apache.org/jira/browse/ARROW-16819
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Wes McKinney
> Assignee: Wes McKinney
> Priority: Major
> Fix For: 9.0.0
>
>
> This is a design deficiency in {{CallFunction}}. If a function is nullary
> (zero input arguments), the execution machinery has no way to determine the
> output length from an empty vector of datums. We should change
> {{CallFunction}} to have variants based on {{ExecBatch}} and {{ExecSpan}}
> (from ARROW-16755)
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