rdettai opened a new pull request #613:
URL: https://github.com/apache/arrow-datafusion/pull/613
# Which issue does this PR close?
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Closes #612.
# Rationale for this change
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The pushdown is forced even for `select *` in
https://github.com/apache/arrow-datafusion/blob/20f6f21ec551f066fd9ff228cc5221f1068c8b03/datafusion/src/optimizer/projection_push_down.rs#L164-L170.
In that case, we should ensure that no column is artificially added if the
table is empty.
# What changes are included in this PR?
I added the test at the context level because it allows it to have a wider
coverage of this corner case.
# Are there any user-facing changes?
No
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