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[datafusion-spark] Add Spark-compatible round function #20596

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[datafusion-spark] Add Spark-compatible round function #20596

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1cdeff1
Add round
Feb 27, 2026
b74012e
mod fix
Feb 27, 2026
0d6a6d7
add comet tests
Feb 27, 2026
8835f30
add doc about datafusion differences
Feb 27, 2026
d4877f9
Merge branch 'main' into sb/datafusion-math-round
shivbhatia10 Feb 27, 2026
2017ddb
Add .slt tests
shivbhatia10 Feb 28, 2026
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4 changes: 4 additions & 0 deletions datafusion/spark/src/function/math/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@ pub mod hex;
pub mod modulus;
pub mod negative;
pub mod rint;
pub mod round;
pub mod trigonometry;
pub mod unhex;
pub mod width_bucket;
Expand All @@ -38,6 +39,7 @@ make_udf_function!(hex::SparkHex, hex);
make_udf_function!(modulus::SparkMod, modulus);
make_udf_function!(modulus::SparkPmod, pmod);
make_udf_function!(rint::SparkRint, rint);
make_udf_function!(round::SparkRound, round);
make_udf_function!(unhex::SparkUnhex, unhex);
make_udf_function!(width_bucket::SparkWidthBucket, width_bucket);
make_udf_function!(trigonometry::SparkCsc, csc);
Expand All @@ -63,6 +65,7 @@ pub mod expr_fn {
"Returns the double value that is closest in value to the argument and is equal to a mathematical integer.",
arg1
));
export_functions!((round, "Rounds expr to d decimal places using HALF_UP rounding mode.", arg1 arg2));
export_functions!((unhex, "Converts hexadecimal string to binary.", arg1));
export_functions!((width_bucket, "Returns the bucket number into which the value of this expression would fall after being evaluated.", arg1 arg2 arg3 arg4));
export_functions!((csc, "Returns the cosecant of expr.", arg1));
Expand All @@ -88,6 +91,7 @@ pub fn functions() -> Vec<Arc<ScalarUDF>> {
modulus(),
pmod(),
rint(),
round(),
unhex(),
width_bucket(),
csc(),
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