peter-toth commented on a change in pull request #31573:
URL: https://github.com/apache/spark/pull/31573#discussion_r576989752
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FileSourceStrategy.scala
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@@ -184,7 +182,9 @@ object FileSourceStrategy extends Strategy with
PredicateHelper with Logging {
// Partition keys are not available in the statistics of the files.
// `dataColumns` might have partition columns, we need to filter them
out.
val dataColumnsWithoutPartitionCols =
dataColumns.filterNot(partitionColumns.contains)
- val dataFilters = normalizedFiltersWithoutSubqueries.flatMap { f =>
+ // Non-scalar subquery expressions are filtered out because they can't
be used to prune
+ // buckets or pushed down as data filters, yet they would be executed
Review comment:
nit: `to prune buckets` is not valid here
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