(arrow-rs) branch main updated: feat: support casting from null to float16 (#8535)

[alamb]

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


The following commit(s) were added to refs/heads/main by this push:
     new d454fdd8e7 feat: support casting from null to float16 (#8535)
d454fdd8e7 is described below

commit d454fdd8e7262f099e8f521858053f94f4cc5b75
Author: Chen Chongchen <chenkov...@qq.com>
AuthorDate: Thu Oct 2 18:43:55 2025 +0800

    feat: support casting from null to float16 (#8535)
    
    # Which issue does this PR close?
    
    
    # Rationale for this change
    
    select arrow_cast(null, 'Float16') is not supported currently.
    
    # What changes are included in this PR?
    
    support casting from null to float16.
    
    # Are these changes tested?
    
    UT
    
    # Are there any user-facing changes?
    
    No
---
 arrow-cast/src/cast/mod.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arrow-cast/src/cast/mod.rs b/arrow-cast/src/cast/mod.rs
index f0e5487a66..f89b7eab7f 100644
--- a/arrow-cast/src/cast/mod.rs
+++ b/arrow-cast/src/cast/mod.rs
@@ -104,6 +104,7 @@ pub fn can_cast_types(from_type: &DataType, to_type: 
&DataType) -> bool {
             | UInt8
             | Int16
             | UInt16
+            | Float16
             | Int32
             | UInt32
             | Float32
@@ -760,6 +761,7 @@ pub fn cast_with_options(
             | UInt8
             | Int16
             | UInt16
+            | Float16
             | Int32
             | UInt32
             | Float32
@@ -7979,6 +7981,7 @@ mod tests {
         typed_test!(UInt32Array, UInt32, UInt32Type);
         typed_test!(UInt64Array, UInt64, UInt64Type);
 
+        typed_test!(Float16Array, Float16, Float16Type);
         typed_test!(Float32Array, Float32, Float32Type);
         typed_test!(Float64Array, Float64, Float64Type);