format_regexp
Regular expression (for Regexp format)format_regexp_escaping_rule
Specifies how each capture group produced byformat_regexp is parsed into its target column type. Use Raw (default) for unescaped text, Escaped for TSV-style escaping, Quoted for Values-style quoted fields, CSV for CSV fields, or JSON for JSON values. This setting applies after the regular expression matches a row; it does not change the regular expression itself.