isidentical opened a new pull request, #3228:
URL: https://github.com/apache/arrow-datafusion/pull/3228
# Which issue does this PR close?
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Closes #3073.
# Rationale for this change
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This PR prevents the removal of predicates without referencing columns
(`WHERE FALSE`, `WHERE 1=1`, etc.) that might have been created during the
column name replacing phase (on filter pushdown optimizer when dealing with
projections specifically).
# What changes are included in this PR?
Columnless predicates are now collected into a separate entity, stripped
away from the actual list of filters when switching the projection/filter and
then re-applied.
# Are there any user-facing changes?
This should fix the bug referenced in #3073
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