Dandandan commented on code in PR #8243:
URL: https://github.com/apache/arrow-datafusion/pull/8243#discussion_r1404831086
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datafusion/common/src/config.rs:
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@@ -524,6 +524,11 @@ config_namespace! {
/// The maximum estimated size in bytes for one input side of a
HashJoin
/// will be collected into a single partition
pub hash_join_single_partition_threshold: usize, default = 1024 * 1024
+
+ /// The default filter selectivity used by Filter Statistics
+ /// when an exact selectivity cannot be determined. Valid values are
+ /// between 0 (no selectivity) and 100 (all rows are selected).
+ pub default_filter_selectivity: u8, default = 20
Review Comment:
I think it makes sense to make this a float (`0.2`).
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