Optimize memory footprint of view arrays from ScalarValue::to_array_of_size (#19441)

## Which issue does this PR close?

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- Closes #19440

## Rationale for this change

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in the issue then this section is not needed.
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When we have view scalars (utf8/binary) and we call `to_array_of_size`,
the data buffers the resultant arrays have contains duplicate data. This
is because the APIs we use don't deduplicate the data, instead appending
it each time even though the data is exactly duplicated.

## What changes are included in this PR?

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PR.
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Manually use a builder with deduplication enabled.

## Are these changes tested?

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Added test.

## Are there any user-facing changes?

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No.

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Author: Jefffrey

datafusion/common/src/scalar/mod.rs

@@ -57,19 +57,20 @@ use crate::utils::SingleRowListArrayBuilder;
 use crate::{_internal_datafusion_err, arrow_datafusion_err};
 use arrow::array::{
     Array, ArrayData, ArrayRef, ArrowNativeTypeOp, ArrowPrimitiveType, AsArray,
-    BinaryArray, BinaryViewArray, BooleanArray, Date32Array, Date64Array, Decimal32Array,
-    Decimal64Array, Decimal128Array, Decimal256Array, DictionaryArray,
-    DurationMicrosecondArray, DurationMillisecondArray, DurationNanosecondArray,
-    DurationSecondArray, FixedSizeBinaryArray, FixedSizeBinaryBuilder,
-    FixedSizeListArray, Float16Array, Float32Array, Float64Array, GenericListArray,
-    Int8Array, Int16Array, Int32Array, Int64Array, IntervalDayTimeArray,
-    IntervalMonthDayNanoArray, IntervalYearMonthArray, LargeBinaryArray, LargeListArray,
-    LargeStringArray, ListArray, MapArray, MutableArrayData, OffsetSizeTrait,
-    PrimitiveArray, Scalar, StringArray, StringViewArray, StructArray,
-    Time32MillisecondArray, Time32SecondArray, Time64MicrosecondArray,
-    Time64NanosecondArray, TimestampMicrosecondArray, TimestampMillisecondArray,
-    TimestampNanosecondArray, TimestampSecondArray, UInt8Array, UInt16Array, UInt32Array,
-    UInt64Array, UnionArray, new_empty_array, new_null_array,
+    BinaryArray, BinaryViewArray, BinaryViewBuilder, BooleanArray, Date32Array,
+    Date64Array, Decimal32Array, Decimal64Array, Decimal128Array, Decimal256Array,
+    DictionaryArray, DurationMicrosecondArray, DurationMillisecondArray,
+    DurationNanosecondArray, DurationSecondArray, FixedSizeBinaryArray,
+    FixedSizeBinaryBuilder, FixedSizeListArray, Float16Array, Float32Array, Float64Array,
+    GenericListArray, Int8Array, Int16Array, Int32Array, Int64Array,
+    IntervalDayTimeArray, IntervalMonthDayNanoArray, IntervalYearMonthArray,
+    LargeBinaryArray, LargeListArray, LargeStringArray, ListArray, MapArray,
+    MutableArrayData, OffsetSizeTrait, PrimitiveArray, Scalar, StringArray,
+    StringViewArray, StringViewBuilder, StructArray, Time32MillisecondArray,
+    Time32SecondArray, Time64MicrosecondArray, Time64NanosecondArray,
+    TimestampMicrosecondArray, TimestampMillisecondArray, TimestampNanosecondArray,
+    TimestampSecondArray, UInt8Array, UInt16Array, UInt32Array, UInt64Array, UnionArray,
+    new_empty_array, new_null_array,
 };
 use arrow::buffer::{BooleanBuffer, ScalarBuffer};
 use arrow::compute::kernels::cast::{CastOptions, cast_with_options};
@@ -3027,7 +3028,13 @@ impl ScalarValue {
             },
             ScalarValue::Utf8View(e) => match e {
                 Some(value) => {
-                    Arc::new(StringViewArray::from_iter_values(repeat_n(value, size)))
+                    let mut builder =
+                        StringViewBuilder::with_capacity(size).with_deduplicate_strings();
+                    for _ in 0..size {
+                        builder.append_value(value);
+                    }
+                    let array = builder.finish();
+                    Arc::new(array)
                 }
                 None => new_null_array(&DataType::Utf8View, size),
             },
@@ -3042,9 +3049,15 @@ impl ScalarValue {
                 None => new_null_array(&DataType::Binary, size),
             },
             ScalarValue::BinaryView(e) => match e {
-                Some(value) => Arc::new(
-                    repeat_n(Some(value.as_slice()), size).collect::<BinaryViewArray>(),
-                ),
+                Some(value) => {
+                    let mut builder =
+                        BinaryViewBuilder::with_capacity(size).with_deduplicate_strings();
+                    for _ in 0..size {
+                        builder.append_value(value);
+                    }
+                    let array = builder.finish();
+                    Arc::new(array)
+                }
                 None => new_null_array(&DataType::BinaryView, size),
             },
             ScalarValue::FixedSizeBinary(s, e) => match e {
@@ -9232,6 +9245,27 @@ mod tests {
         }
     }
 
+    #[test]
+    fn test_views_minimize_memory() {
+        let value = "this string is longer than 12 bytes".to_string();
+
+        let scalar = ScalarValue::Utf8View(Some(value.clone()));
+        let array = scalar.to_array_of_size(10).unwrap();
+        let array = array.as_string_view();
+        let buffers = array.data_buffers();
+        assert_eq!(1, buffers.len());
+        // Ensure we only have a single copy of the value string
+        assert_eq!(value.len(), buffers[0].len());
+
+        // Same but for BinaryView
+        let scalar = ScalarValue::BinaryView(Some(value.bytes().collect()));
+        let array = scalar.to_array_of_size(10).unwrap();
+        let array = array.as_binary_view();
+        let buffers = array.data_buffers();
+        assert_eq!(1, buffers.len());
+        assert_eq!(value.len(), buffers[0].len());
+    }
+
     #[test]
     fn test_convert_array_to_scalar_vec() {
         // 1: Regular ListArray