getChan commented on code in PR #16350:
URL: https://github.com/apache/datafusion/pull/16350#discussion_r2138299341
##########
datafusion/spark/src/function/math/hex.rs:
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@@ -192,7 +195,7 @@ pub fn spark_hex(args: &[ColumnarValue]) ->
Result<ColumnarValue, DataFusionErro
let hexed: StringArray = array
.iter()
- .map(|v| v.map(hex_bytes).transpose())
+ .map(|v| v.map(|b| hex_bytes(b, true)).transpose())
Review Comment:
It seems that Spark's hex function is expected to return uppercase
characters.
https://spark.apache.org/docs/latest/api/sql/index.html#hex
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