cloud-fan commented on code in PR #41088:
URL: https://github.com/apache/spark/pull/41088#discussion_r1281629444
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sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FileSourceStrategy.scala:
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@@ -171,13 +172,12 @@ object FileSourceStrategy extends Strategy with
PredicateHelper with Logging {
val partitionKeyFilters =
DataSourceStrategy.getPushedDownFilters(partitionColumns,
normalizedFilters)
- // 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
- val normalizedFiltersWithoutSubqueries =
- normalizedFilters.filterNot(SubqueryExpression.hasSubquery)
-
val bucketSpec: Option[BucketSpec] = fsRelation.bucketSpec
val bucketSet = if (shouldPruneBuckets(bucketSpec)) {
+ // subquery expressions are filtered out because they can't be used to
prune buckets
Review Comment:
why scalar subquery can't be used to prune buckets?
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