alamb commented on code in PR #12395:
URL: https://github.com/apache/datafusion/pull/12395#discussion_r1775902607
##########
datafusion/functions/src/string/common.rs:
##########
@@ -72,65 +94,126 @@ pub(crate) fn general_trim<T: OffsetSizeTrait>(
};
if use_string_view {
- string_view_trim::<T>(func, args)
+ string_view_trim(func, args)
} else {
string_trim::<T>(func, args)
}
}
// removing 'a will cause compiler complaining lifetime of `func`
-fn string_view_trim<'a, T: OffsetSizeTrait>(
- func: fn(&'a str, &'a str) -> &'a str,
+fn string_view_trim<'a>(
+ trim_func: fn(&'a str, &'a str) -> &'a str,
args: &'a [ArrayRef],
) -> Result<ArrayRef> {
- let string_array = as_string_view_array(&args[0])?;
+ let string_view_array = as_string_view_array(&args[0])?;
+ let mut views_buf = Vec::with_capacity(string_view_array.len());
+ let mut null_builder = NullBufferBuilder::new(string_view_array.len());
Review Comment:
I tried StringViewBuilder. It seems it doesn't permit pushing pre-created
views.
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