Ted-Jiang commented on code in PR #4255:
URL: https://github.com/apache/arrow-datafusion/pull/4255#discussion_r1028795409


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datafusion/core/src/physical_plan/file_format/parquet/page_filter.rs:
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@@ -390,16 +405,54 @@ macro_rules! get_min_max_values_for_page_index {
         match $self.col_page_indexes {
             Index::NONE => None,
             Index::INT32(index) => {
-                let vec = &index.indexes;
-                Some(Arc::new(Int32Array::from_iter(
-                    vec.iter().map(|x| x.$func().cloned()),
-                )))
+                match $self.target_type {
+                    // int32 to decimal with the precision and scale
+                    Some(DataType::Decimal128(precision, scale)) => {
+                        let vec = &index.indexes;
+                        let vec: Vec<Option<i128>> = vec
+                            .iter()
+                            .map(|x| x.min().and_then(|x| Some(*x as i128)))

Review Comment:
   Your are right! i forgot change it writing the macro,   real surprise ut not 
cover this 😂



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