Function unhex_scalar

datafusion/spark/src/function/math/unhex.rs:143–150

Convert a single hex string to binary

(s: &str)

/// Convert a single hex string to binary
fn unhex_scalar(s: &str) -> Option<Vec<u8>> {
    let mut buffer = Vec::with_capacity(s.len().div_ceil(2));
    if unhex_common(s.as_bytes(), &mut buffer) {
        Some(buffer)
    } else {
        None
    }
}

fn spark_unhex(args: &[ColumnarValue]) -> Result<ColumnarValue, DataFusionError> {
    let [args] = take_function_args("unhex", args)?;