tomvanbussel opened a new pull request, #44833:
URL: https://github.com/apache/spark/pull/44833
### What changes were proposed in this pull request?
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This PR modifies `LogicalRDD` to filter out all subqueries from its
`constraints`.
### Why are the changes needed?
Fixes a correctness bug. Spark can produce incorrect results when using a
checkpointed `DataFrame` with a filter containing a scalar subquery. This
subquery is included in the constraints of the resulting `LogicalRDD`, and may
then be propagated as a filter when joining with the checkpointed `DataFrame`.
This causes the subquery to be evaluated twice: once during checkpointing and
once while evaluating the query. These two subquery evaluations may return
different results, e.g. when the subquery contains a limit with an
underspecified sort order.
### Does this PR introduce _any_ user-facing change?
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No
### How was this patch tested?
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Added a test to `DataFrameSuite`.
### Was this patch authored or co-authored using generative AI tooling?
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No
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