Function regexp_extract

src/expr/src/relation/func.rs:2960–2969

(a: Datum, r: &AnalyzedRegex)

}

fn regexp_extract(a: Datum, r: &AnalyzedRegex) -> Option<(Row, Diff)> {
    let r = r.inner();
    let a = a.unwrap_str();
    let captures = r.captures(a)?;
    let datums = captures
        .iter()
        .skip(1)
        .map(|m| Datum::from(m.map(|m| m.as_str())));
    Some((Row::pack(datums), Diff::ONE))
}

fn regexp_matches<'a>(
    exprs: &[Datum<'a>],