Lordworms commented on code in PR #11942:
URL: https://github.com/apache/datafusion/pull/11942#discussion_r1714125884
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datafusion/functions/src/unicode/rpad.rs:
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@@ -77,96 +82,122 @@ impl ScalarUDFImpl for RPadFunc {
fn invoke(&self, args: &[ColumnarValue]) -> Result<ColumnarValue> {
match args[0].data_type() {
- DataType::Utf8 => make_scalar_function(rpad::<i32>, vec![])(args),
+ DataType::Utf8 | DataType::Utf8View => {
+ make_scalar_function(rpad::<i32>, vec![])(args)
+ }
DataType::LargeUtf8 => make_scalar_function(rpad::<i64>,
vec![])(args),
other => exec_err!("Unsupported data type {other:?} for function
rpad"),
}
}
}
-/// Extends the string to length 'length' by appending the characters fill (a
space by default). If the string is already longer than length then it is
truncated.
-/// rpad('hi', 5, 'xy') = 'hixyx'
-pub fn rpad<T: OffsetSizeTrait>(args: &[ArrayRef]) -> Result<ArrayRef> {
- match args.len() {
- 2 => {
- let string_array = as_generic_string_array::<T>(&args[0])?;
- let length_array = as_int64_array(&args[1])?;
-
- let result = string_array
- .iter()
- .zip(length_array.iter())
- .map(|(string, length)| match (string, length) {
- (Some(string), Some(length)) => {
- if length > i32::MAX as i64 {
- return exec_err!(
- "rpad requested length {length} too large"
- );
- }
+macro_rules! process_rpad {
+ // For the two-argument case
+ ($string_array:expr, $length_array:expr, $is_view:expr) => {{
+ $string_array
+ .iter()
+ .zip($length_array.iter())
+ .map(|(string, length)| match (string, length) {
+ (Some(string), Some(length)) => {
+ if length > i32::MAX as i64 {
+ return exec_err!("rpad requested length {} too large",
length);
+ }
- let length = if length < 0 { 0 } else { length as
usize };
- if length == 0 {
- Ok(Some("".to_string()))
+ let length = if length < 0 { 0 } else { length as usize };
+ if length == 0 {
+ Ok(Some("".to_string()))
+ } else {
+ let graphemes =
string.graphemes(true).collect::<Vec<&str>>();
+ if length < graphemes.len() {
+ Ok(Some(graphemes[..length].concat()))
} else {
- let graphemes =
string.graphemes(true).collect::<Vec<&str>>();
- if length < graphemes.len() {
- Ok(Some(graphemes[..length].concat()))
+ let mut s = string.to_string();
+ if !$is_view {
Review Comment:
I'll discard that, sorry for it, it is the old code implementation
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