> ## Documentation Index
> Fetch the complete documentation index at: https://clickhouse.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# format_regexp_* format settings

> ClickHouse format settings in the format_regexp_* generated group.

export const SettingsInfoBlock = ({type, default_value, changeable_without_restart}) => {
  return <div className="not-prose" style={{
    display: "flex",
    flexWrap: "wrap",
    alignItems: "baseline",
    columnGap: "0.5rem",
    rowGap: "0.125rem",
    margin: "0.375rem 0",
    fontSize: "0.8125rem",
    lineHeight: "1.125rem"
  }}>
      <div style={{
    fontWeight: 600,
    opacity: 0.72
  }}>Type</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{type}</div>
      <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>Default</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{default_value}</div>
      {changeable_without_restart && <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>
          Changeable without restart
        </div>}
      {changeable_without_restart && <div style={{
    overflowWrap: "anywhere"
  }}>
          {changeable_without_restart}
        </div>}
    </div>;
};

These settings are autogenerated from [source](https://github.com/ClickHouse/ClickHouse/blob/master/src/Core/FormatFactorySettings.h).

<h2 id="format_regexp">
  format\_regexp
</h2>

Regular expression (for Regexp format)

<h2 id="format_regexp_escaping_rule">
  format\_regexp\_escaping\_rule
</h2>

<SettingsInfoBlock type="EscapingRule" default_value="Raw" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "20.10"},{"label": "Raw"},{"label": "Use Raw as default escaping rule for Regexp format to male the behaviour more like to what users expect"}]}]} />

Field escaping rule (for Regexp format)

<h2 id="format_regexp_skip_unmatched">
  format\_regexp\_skip\_unmatched
</h2>

<SettingsInfoBlock type="Bool" default_value="0" />

Skip lines unmatched by regular expression (for Regexp format)