From f5ac7952267daafc62a38120d7d708edebf5ce1f Mon Sep 17 00:00:00 2001
From: Eduard Karacharov <eduard.karacharov@gmail.com>
Date: Tue, 7 Nov 2023 09:35:52 +0300
Subject: [PATCH] set filter statistics as inexact input if unknown

---
 datafusion/physical-plan/src/filter.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/datafusion/physical-plan/src/filter.rs b/datafusion/physical-plan/src/filter.rs
index 59f9928d0e21..a8cd24dd6a3f 100644
--- a/datafusion/physical-plan/src/filter.rs
+++ b/datafusion/physical-plan/src/filter.rs
@@ -204,10 +204,11 @@ impl ExecutionPlan for FilterExec {
         let predicate = self.predicate();
 
         let schema = self.schema();
+        let input_stats = self.input.statistics()?;
+
         if !check_support(predicate, &schema) {
-            return Ok(Statistics::new_unknown(&schema));
+            return Ok(input_stats.into_inexact());
         }
-        let input_stats = self.input.statistics()?;
 
         let num_rows = input_stats.num_rows;
         let total_byte_size = input_stats.total_byte_size;