[arrow-rs] branch master updated: Add gt dyn scalar kernel (#1116)

[alamb]

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alamb pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/arrow-rs.git


The following commit(s) were added to refs/heads/master by this push:
     new 1cbda7a  Add gt dyn scalar kernel (#1116)
1cbda7a is described below

commit 1cbda7a754b7075fadf50c6935bd088ea0f49b42
Author: Matthew Turner <matthew.m.tur...@outlook.com>
AuthorDate: Sun Jan 2 06:47:28 2022 -0500

    Add gt dyn scalar kernel (#1116)
    
    * Add gt_dyn_scalar kernel
    
    Co-authored-by: Andrew Lamb <and...@nerdnetworks.org>
---
 arrow/src/compute/kernels/comparison.rs | 64 +++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)

diff --git a/arrow/src/compute/kernels/comparison.rs 
b/arrow/src/compute/kernels/comparison.rs
index 60ba634..c4c9fa1 100644
--- a/arrow/src/compute/kernels/comparison.rs
+++ b/arrow/src/compute/kernels/comparison.rs
@@ -1193,6 +1193,42 @@ where
     }
 }
 
+/// Perform `left > right` operation on an array and a numeric scalar
+/// value. Supports PrimitiveArrays, and DictionaryArrays that have primitive 
values
+pub fn gt_dyn_scalar<T>(left: Arc<dyn Array>, right: T) -> Result<BooleanArray>
+where
+    T: TryInto<i128> + Copy + std::fmt::Debug,
+{
+    match left.data_type() {
+        DataType::Dictionary(key_type, value_type) => match 
value_type.as_ref() {
+            DataType::Int8
+            | DataType::Int16
+            | DataType::Int32
+            | DataType::Int64
+            | DataType::UInt8
+            | DataType::UInt16
+            | DataType::UInt32
+            | DataType::UInt64 => {dyn_compare_scalar!(&left, right, key_type, 
gt_scalar)}
+            _ => Err(ArrowError::ComputeError(
+                "gt_dyn_scalar only supports PrimitiveArray or DictionaryArray 
with Primitive values".to_string(),
+            ))
+        }
+        DataType::Int8
+        | DataType::Int16
+        | DataType::Int32
+        | DataType::Int64
+        | DataType::UInt8
+        | DataType::UInt16
+        | DataType::UInt32
+        | DataType::UInt64 => {
+            dyn_compare_scalar!(&left, right, gt_scalar)
+        }
+        _ => Err(ArrowError::ComputeError(
+            "gt_dyn_scalar only supports PrimitiveArray or DictionaryArray 
with Primitive values".to_string(),
+        ))
+    }
+}
+
 /// Perform `left == right` operation on an array and a numeric scalar
 /// value. Supports StringArrays, and DictionaryArrays that have string values
 pub fn eq_dyn_utf8_scalar(left: Arc<dyn Array>, right: &str) -> 
Result<BooleanArray> {
@@ -3146,6 +3182,34 @@ mod tests {
     }
 
     #[test]
+    fn test_gt_dyn_scalar() {
+        let array = Int32Array::from(vec![6, 7, 8, 8, 10]);
+        let array = Arc::new(array);
+        let a_eq = gt_dyn_scalar(array, 8).unwrap();
+        assert_eq!(
+            a_eq,
+            BooleanArray::from(
+                vec![Some(false), Some(false), Some(false), Some(false), 
Some(true)]
+            )
+        );
+    }
+    #[test]
+    fn test_gt_dyn_scalar_with_dict() {
+        let key_builder = PrimitiveBuilder::<Int8Type>::new(3);
+        let value_builder = PrimitiveBuilder::<Int32Type>::new(2);
+        let mut builder = PrimitiveDictionaryBuilder::new(key_builder, 
value_builder);
+        builder.append(123).unwrap();
+        builder.append_null().unwrap();
+        builder.append(23).unwrap();
+        let array = Arc::new(builder.finish());
+        let a_eq = gt_dyn_scalar(array, 23).unwrap();
+        assert_eq!(
+            a_eq,
+            BooleanArray::from(vec![Some(true), None, Some(false)])
+        );
+    }
+
+    #[test]
     fn test_eq_dyn_utf8_scalar() {
         let array = StringArray::from(vec!["abc", "def", "xyz"]);
         let array = Arc::new(array);