Replaced Display by Debug

examples/csv_read_async.rs

@@ -29,6 +29,6 @@ async fn main() -> Result<()> {
         0,
         deserialize_column,
     )?;
-    println!("{}", batch.column(0));
+    println!("{:?}", batch.column(0));
     Ok(())
 }

src/array/boolean/mod.rs

@@ -15,7 +15,7 @@ pub use mutable::*;
 
 /// The Arrow's equivalent to an immutable `Vec<Option<bool>>`, but with `1/16` of its size.
 /// Cloning and slicing this struct is `O(1)`.
-#[derive(Debug, Clone)]
+#[derive(Clone)]
 pub struct BooleanArray {
     data_type: DataType,
     values: Bitmap,
@@ -168,7 +168,7 @@ impl Array for BooleanArray {
     }
 }
 
-impl std::fmt::Display for BooleanArray {
+impl std::fmt::Debug for BooleanArray {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         display_fmt(self.iter(), "BooleanArray", f, false)
     }

src/array/dictionary/mod.rs

@@ -208,7 +208,7 @@ where
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         let display = get_value_display(self);
         let new_lines = false;
-        let head = &format!("{}", self.data_type());
+        let head = &format!("{:?}", self.data_type());
         let iter = self.iter().enumerate().map(|(i, x)| x.map(|_| display(i)));
         display_fmt(iter, head, f, new_lines)
     }

src/array/fixed_size_binary/mod.rs

@@ -9,7 +9,7 @@ pub use mutable::*;
 
 /// The Arrow's equivalent to an immutable `Vec<Option<[u8; size]>>`.
 /// Cloning and slicing this struct is `O(1)`.
-#[derive(Debug, Clone)]
+#[derive(Clone)]
 pub struct FixedSizeBinaryArray {
     size: usize, // this is redundant with `data_type`, but useful to not have to deconstruct the data_type.
     data_type: DataType,
@@ -205,7 +205,7 @@ impl Array for FixedSizeBinaryArray {
     }
 }
 
-impl std::fmt::Display for FixedSizeBinaryArray {
+impl std::fmt::Debug for FixedSizeBinaryArray {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         let iter = self.iter().map(|x| x.map(|x| format!("{:?}", x)));
         display_fmt(iter, "FixedSizeBinaryArray", f, false)

src/array/fixed_size_list/mod.rs

@@ -5,7 +5,7 @@ use crate::{
     datatypes::{DataType, Field},
 };
 
-use super::{display_fmt, new_empty_array, new_null_array, Array};
+use super::{debug_fmt, new_empty_array, new_null_array, Array};
 
 mod ffi;
 mod iterator;
@@ -15,7 +15,7 @@ pub use mutable::*;
 
 /// The Arrow's equivalent to an immutable `Vec<Option<[T; size]>>` where `T` is an Arrow type.
 /// Cloning and slicing this struct is `O(1)`.
-#[derive(Debug, Clone)]
+#[derive(Clone)]
 pub struct FixedSizeListArray {
     size: usize, // this is redundant with `data_type`, but useful to not have to deconstruct the data_type.
     data_type: DataType,
@@ -196,8 +196,8 @@ impl Array for FixedSizeListArray {
     }
 }
 
-impl std::fmt::Display for FixedSizeListArray {
+impl std::fmt::Debug for FixedSizeListArray {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        display_fmt(self.iter(), "FixedSizeListArray", f, true)
+        debug_fmt(self.iter(), "FixedSizeListArray", f, true)
     }
 }

src/array/list/mod.rs

@@ -7,7 +7,7 @@ use crate::{
 };
 
 use super::{
-    display_fmt, new_empty_array,
+    debug_fmt, new_empty_array,
     specification::{check_offsets, Offset},
     Array,
 };
@@ -19,7 +19,7 @@ mod mutable;
 pub use mutable::*;
 
 /// An [`Array`] semantically equivalent to `Vec<Option<Vec<Option<T>>>>` with Arrow's in-memory.
-#[derive(Debug, Clone)]
+#[derive(Clone)]
 pub struct ListArray<O: Offset> {
     data_type: DataType,
     offsets: Buffer<O>,
@@ -241,13 +241,13 @@ impl<O: Offset> Array for ListArray<O> {
     }
 }
 
-impl<O: Offset> std::fmt::Display for ListArray<O> {
+impl<O: Offset> std::fmt::Debug for ListArray<O> {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         let head = if O::is_large() {
             "LargeListArray"
         } else {
             "ListArray"
         };
-        display_fmt(self.iter(), head, f, true)
+        debug_fmt(self.iter(), head, f, true)
     }
 }

src/array/mod.rs

@@ -18,7 +18,6 @@
 //! Most arrays contain a [`MutableArray`] counterpart that is neither clonable nor slicable, but
 //! can be operated in-place.
 use std::any::Any;
-use std::fmt::Display;
 
 use crate::error::Result;
 use crate::types::{days_ms, months_days_ns};
@@ -29,7 +28,7 @@ use crate::{
 
 /// A trait representing an immutable Arrow array. Arrow arrays are trait objects
 /// that are infalibly downcasted to concrete types according to the [`Array::data_type`].
-pub trait Array: std::fmt::Debug + Send + Sync {
+pub trait Array: Send + Sync {
     /// Convert to trait object.
     fn as_any(&self) -> &dyn Any;
 
@@ -214,7 +213,7 @@ macro_rules! with_match_primitive_type {(
     }
 })}
 
-impl Display for dyn Array {
+impl std::fmt::Debug for dyn Array + '_ {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         use crate::datatypes::PhysicalType::*;
         match self.data_type().to_physical_type() {
@@ -394,31 +393,34 @@ pub trait TryPush<A> {
 }
 
 fn display_helper<T: std::fmt::Display, I: IntoIterator<Item = Option<T>>>(iter: I) -> Vec<String> {
-    let iterator = iter.into_iter();
-    let len = iterator.size_hint().0;
-    if len <= 100 {
-        iterator
-            .map(|x| match x {
-                Some(x) => x.to_string(),
-                None => "".to_string(),
-            })
-            .collect::<Vec<_>>()
+    iter.into_iter()
+        .map(|x| match x {
+            Some(x) => x.to_string(),
+            None => "None".to_string(),
+        })
+        .collect::<Vec<_>>()
+}
+
+fn debug_helper<T: std::fmt::Debug, I: IntoIterator<Item = Option<T>>>(iter: I) -> Vec<String> {
+    iter.into_iter()
+        .map(|x| match x {
+            Some(x) => format!("{:?}", x),
+            None => "None".to_string(),
+        })
+        .collect::<Vec<_>>()
+}
+
+fn debug_fmt<T: std::fmt::Debug, I: IntoIterator<Item = Option<T>>>(
+    iter: I,
+    head: &str,
+    f: &mut std::fmt::Formatter<'_>,
+    new_lines: bool,
+) -> std::fmt::Result {
+    let result = debug_helper(iter);
+    if new_lines {
+        write!(f, "{}[\n{}\n]", head, result.join(",\n"))
     } else {
-        iterator
-            .enumerate()
-            .filter_map(|(i, x)| {
-                if i == 5 {
-                    Some(format!("...({})...", len - 10))
-                } else if i < 5 || i > (len - 5) {
-                    Some(match x {
-                        Some(x) => x.to_string(),
-                        None => "".to_string(),
-                    })
-                } else {
-                    None
-                }
-            })
-            .collect::<Vec<_>>()
+        write!(f, "{}[{}]", head, result.join(", "))
     }
 }
 

src/array/null.rs

@@ -7,7 +7,7 @@ use crate::{
 };
 
 /// The concrete [`Array`] of [`DataType::Null`].
-#[derive(Debug, Clone)]
+#[derive(Clone)]
 pub struct NullArray {
     data_type: DataType,
     length: usize,
@@ -74,7 +74,7 @@ impl Array for NullArray {
     }
 }
 
-impl std::fmt::Display for NullArray {
+impl std::fmt::Debug for NullArray {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(f, "NullArray({})", self.len())
     }

src/array/primitive/display.rs

@@ -1,14 +1,14 @@
 use crate::types::NativeType;
 
 use super::super::display::get_value_display;
-use super::super::{display_fmt, Array};
+use super::super::display_fmt;
 use super::PrimitiveArray;
 
-impl<T: NativeType> std::fmt::Display for PrimitiveArray<T> {
+impl<T: NativeType> std::fmt::Debug for PrimitiveArray<T> {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         let display = get_value_display(self);
         let new_lines = false;
-        let head = &format!("{}", self.data_type());
+        let head = &format!("{:?}", self.data_type());
         let iter = self.iter().enumerate().map(|(i, x)| x.map(|_| display(i)));
         display_fmt(iter, head, f, new_lines)
     }

src/array/primitive/mod.rs

@@ -30,7 +30,7 @@ pub use mutable::*;
 /// assert_eq!(array.validity(), Some(&Bitmap::from([true, false, true])));
 /// # }
 /// ```
-#[derive(Debug, Clone)]
+#[derive(Clone)]
 pub struct PrimitiveArray<T: NativeType> {
     data_type: DataType,
     values: Buffer<T>,
@@ -61,7 +61,7 @@ impl<T: NativeType> PrimitiveArray<T> {
     pub fn from_data(data_type: DataType, values: Buffer<T>, validity: Option<Bitmap>) -> Self {
         if !T::is_valid(&data_type) {
             Err(ArrowError::InvalidArgumentError(format!(
-                "Type {} does not support logical type {}",
+                "Type {} does not support logical type {:?}",
                 std::any::type_name::<T>(),
                 data_type
             )))
@@ -135,6 +135,11 @@ impl<T: NativeType> PrimitiveArray<T> {
         self.validity.as_ref()
     }
 
+    #[inline]
+    fn data_type(&self) -> &DataType {
+        &self.data_type
+    }
+
     /// The values [`Buffer`].
     /// Values on null slots are undetermined (they can be anything).
     #[inline]
@@ -166,7 +171,7 @@ impl<T: NativeType> PrimitiveArray<T> {
     pub fn to(self, data_type: DataType) -> Self {
         if !T::is_valid(&data_type) {
             Err(ArrowError::InvalidArgumentError(format!(
-                "Type {} does not support logical type {}",
+                "Type {} does not support logical type {:?}",
                 std::any::type_name::<T>(),
                 data_type
             )))
@@ -193,7 +198,7 @@ impl<T: NativeType> Array for PrimitiveArray<T> {
 
     #[inline]
     fn data_type(&self) -> &DataType {
-        &self.data_type
+        self.data_type()
     }
 
     fn validity(&self) -> Option<&Bitmap> {

src/array/primitive/mutable.rs

@@ -62,7 +62,7 @@ impl<T: NativeType + NaturalDataType> MutablePrimitiveArray<T> {
     ) -> Self {
         if !T::is_valid(&data_type) {
             Err(ArrowError::InvalidArgumentError(format!(
-                "Type {} does not support logical type {}",
+                "Type {} does not support logical type {:?}",
                 std::any::type_name::<T>(),
                 data_type
             )))

src/array/struct_/mod.rs

@@ -27,7 +27,7 @@ mod iterator;
 ///
 /// let array = StructArray::from_data(DataType::Struct(fields), vec![boolean, int], None);
 /// ```
-#[derive(Debug, Clone)]
+#[derive(Clone)]
 pub struct StructArray {
     data_type: DataType,
     values: Vec<Arc<dyn Array>>,
@@ -214,11 +214,11 @@ impl Array for StructArray {
     }
 }
 
-impl std::fmt::Display for StructArray {
+impl std::fmt::Debug for StructArray {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         writeln!(f, "StructArray{{")?;
         for (field, column) in self.fields().iter().zip(self.values()) {
-            writeln!(f, "{}: {},", field.name(), column)?;
+            writeln!(f, "{}: {:?},", field.name(), column)?;
         }
         write!(f, "}}")
     }

src/array/union/mod.rs

@@ -23,7 +23,7 @@ type FieldEntry = (usize, Arc<dyn Array>);
 // let field = field.as_any().downcast to correct type;
 // let value = field.value(offset);
 // ```
-#[derive(Debug, Clone)]
+#[derive(Clone)]
 pub struct UnionArray {
     types: Buffer<i8>,
     // None represents when there is no typeid
@@ -274,7 +274,7 @@ impl UnionArray {
     }
 }
 
-impl std::fmt::Display for UnionArray {
+impl std::fmt::Debug for UnionArray {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         let display = get_value_display(self);
         let new_lines = false;

src/array/utf8/mod.rs

@@ -261,7 +261,7 @@ impl<O: Offset> Array for Utf8Array<O> {
 
 impl<O: Offset> std::fmt::Display for Utf8Array<O> {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        display_fmt(self.iter(), &format!("{}", self.data_type()), f, false)
+        display_fmt(self.iter(), &format!("{:?}", self.data_type()), f, false)
     }
 }
 

src/compute/aggregate/min_max.rs

@@ -394,7 +394,7 @@ pub fn max(array: &dyn Array) -> Result<Box<dyn Scalar>> {
         }
         _ => {
             return Err(ArrowError::InvalidArgumentError(format!(
-                "The `max` operator does not support type `{}`",
+                "The `max` operator does not support type `{:?}`",
                 array.data_type(),
             )))
         }
@@ -435,7 +435,7 @@ pub fn min(array: &dyn Array) -> Result<Box<dyn Scalar>> {
         }
         _ => {
             return Err(ArrowError::InvalidArgumentError(format!(
-                "The `max` operator does not support type `{}`",
+                "The `max` operator does not support type `{:?}`",
                 array.data_type(),
             )))
         }

src/compute/aggregate/sum.rs

@@ -168,7 +168,7 @@ pub fn sum(array: &dyn Array) -> Result<Box<dyn Scalar>> {
         DataType::Float64 => dyn_sum!(f64, array),
         _ => {
             return Err(ArrowError::InvalidArgumentError(format!(
-                "The `sum` operator does not support type `{}`",
+                "The `sum` operator does not support type `{:?}`",
                 array.data_type(),
             )))
         }

src/compute/if_then_else.rs

@@ -30,7 +30,7 @@ pub fn if_then_else(
 ) -> Result<Box<dyn Array>> {
     if lhs.data_type() != rhs.data_type() {
         return Err(ArrowError::InvalidArgumentError(format!(
-            "If then else requires the arguments to have the same datatypes ({} != {})",
+            "If then else requires the arguments to have the same datatypes ({:?} != {:?})",
             lhs.data_type(),
             rhs.data_type()
         )));

src/compute/nullif.rs

@@ -165,7 +165,7 @@ pub fn nullif(lhs: &dyn Array, rhs: &dyn Array) -> Result<Box<dyn Array>> {
         )
         .map(|x| Box::new(x) as Box<dyn Array>),
         other => Err(ArrowError::NotYetImplemented(format!(
-            "Nullif is not implemented for logical datatype {}",
+            "Nullif is not implemented for logical datatype {:?}",
             other
         ))),
     }

src/datatypes/field.rs

@@ -292,9 +292,3 @@ impl Field {
         Ok(())
     }
 }
-
-impl std::fmt::Display for Field {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        write!(f, "{:?}", self)
-    }
-}