fix

Author: Rich-T-kid

datafusion/datasource-parquet/src/metadata.rs

@@ -966,9 +966,6 @@ fn summarize_distinct_counts(
     }
 
     Ok(match max_distinct_count {
-        Some(distinct_count) if num_row_groups == 1 => {
-            Precision::Exact(distinct_count as usize)
-        }
         Some(distinct_count) => Precision::Inexact(distinct_count as usize),
         None => Precision::Absent,
     })
@@ -1533,7 +1530,7 @@ mod tests {
 
         #[test]
         fn test_distinct_count_single_row_group_with_ndv() {
-            // Single row group with distinct count should return Exact
+            // Single row group with distinct count should return Inexact
             let schema_descr = create_schema_descr(1);
             let arrow_schema = create_arrow_schema(1);
 
@@ -1558,7 +1555,7 @@ mod tests {
 
             assert_eq!(
                 result.column_statistics[0].distinct_count,
-                Precision::Exact(42)
+                Precision::Inexact(42)
             );
         }
 
@@ -1745,15 +1742,15 @@ mod tests {
 
             assert_eq!(
                 result.column_statistics[0].distinct_count,
-                Precision::Exact(5)
+                Precision::Inexact(5)
             );
             assert_eq!(
                 result.column_statistics[1].distinct_count,
                 Precision::Absent
             );
             assert_eq!(
                 result.column_statistics[2].distinct_count,
-                Precision::Exact(100)
+                Precision::Inexact(100)
             );
         }
 
@@ -1922,15 +1919,15 @@ mod tests {
             // category: 10 distinct values
             assert_eq!(
                 result.column_statistics[1].distinct_count,
-                Precision::Exact(10),
-                "category column should have Exact(10) distinct_count"
+                Precision::Inexact(10),
+                "category column should have Inexact(10) distinct_count"
             );
 
             // name: 5 distinct values
             assert_eq!(
                 result.column_statistics[2].distinct_count,
-                Precision::Exact(5),
-                "name column should have Exact(5) distinct_count"
+                Precision::Inexact(5),
+                "name column should have Inexact(5) distinct_count"
             );
         }
     }