> ## 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.

# escape_* MergeTree table settings

> ClickHouse MergeTree table settings in the escape_* 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 available in [system.merge\_tree\_settings](/docs/reference/system-tables/merge_tree_settings) and are autogenerated from ClickHouse source.

<h2 id="escape_index_filenames">
  escape\_index\_filenames
</h2>

<SettingsInfoBlock type="Bool" default_value="1" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "26.1"},{"label": "1"},{"label": "Escape non-ascii characters in filenames created for indices"}]}]} />

Prior to 26.1 we didn't escape special symbols in filenames created for secondary indices, which could lead to issues with some
characters in index names producing broken parts. This is added purely for compatibility reasons. It should not be changed unless you
are reading old parts with indices using non-ascii characters in their names.

<h2 id="escape_variant_subcolumn_filenames">
  escape\_variant\_subcolumn\_filenames
</h2>

<SettingsInfoBlock type="Bool" default_value="1" />

<VersionHistory rows={[{"id": "row-1","items": [{"label": "25.11"},{"label": "1"},{"label": "Escape special symbols for filenames created for Variant type subcolumns in Wide parts"}]}]} />

Escape special symbols in filenames created for subcolumns of Variant data type in Wide parts of MergeTree table. Needed for compatibility.