andygrove commented on PR #2772:
URL:
https://github.com/apache/datafusion-comet/pull/2772#issuecomment-3529547218
> In the past I think we've encountered differences in Java and Rust's regex
engines wrt graphemes. Could we get some larger UTF-8 characters in the tests?
We probably need to fall back to Spark unless this config is enabled:
```
val COMET_REGEXP_ALLOW_INCOMPATIBLE: ConfigEntry[Boolean] =
conf("spark.comet.regexp.allowIncompatible")
.category(CATEGORY_EXEC)
.doc("Comet is not currently fully compatible with Spark for all
regular expressions. " +
s"Set this config to true to allow them anyway. $COMPAT_GUIDE.")
.booleanConf
.createWithDefault(false)
```
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