Function compile_regex

datafusion/functions/src/regex/mod.rs:149–166

(regex: &str, flags: Option<&str>)

}

pub fn compile_regex(regex: &str, flags: Option<&str>) -> Result<Regex, ArrowError> {
    let pattern = match flags {
        None | Some("") => regex.to_string(),
        Some(flags) => {
            if flags.contains("g") {
                return Err(ArrowError::ComputeError(
                    "regexp_count()/regexp_instr() does not support the global flag"
                        .to_string(),
                ));
            }
            format!("(?{flags}){regex}")
        }
    };

    Regex::new(&pattern).map_err(|_| {
        ArrowError::ComputeError(format!("Regular expression did not compile: {pattern}"))
    })
}