> ## Documentation Index
> Fetch the complete documentation index at: https://private-7c7dfe99-fix-nav-issues.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

> Table engine that allows importing data from a YTsaurus cluster.

# YTsaurus table engine

export const ExperimentalBadge = () => {
  return <div className="experimentalBadge">
            <div className="experimentalIcon">
            <svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
                <path strokeWidth="1.25" d="M5.5 2H10.5" stroke="currentColor" strokeLinecap="round" strokeLinejoin="round" />
                <path strokeWidth="1.25" d="M9.50015 2V6.19625L13.4283 12.7425C13.4738 12.8183 13.4985 12.9049 13.4996 12.9934C13.5008 13.0818 13.4785 13.169 13.435 13.246C13.3914 13.323 13.3283 13.3871 13.2519 13.4317C13.1755 13.4764 13.0886 13.4999 13.0002 13.5H3.00015C2.91164 13.5 2.8247 13.4766 2.74822 13.432C2.67174 13.3874 2.60847 13.3233 2.56487 13.2463C2.52126 13.1693 2.49889 13.082 2.50004 12.9935C2.50119 12.905 2.52582 12.8184 2.5714 12.7425L6.50015 6.19625V2" stroke="currentColor" strokeLinecap="round" strokeLinejoin="round" />
                <path strokeWidth="1.25" d="M4.47656 9.56754C5.30344 9.41254 6.47656 9.47942 7.99969 10.25C10.0153 11.2707 11.4216 11.0569 12.2184 10.7282" stroke="currentColor" strokeLinecap="round" strokeLinejoin="round" />
            </svg>
        </div>
            Experimental feature. <u><a href="/docs/beta-and-experimental-features#experimental-features">Learn more.</a></u>
        </div>;
};

export const CloudNotSupportedBadge = () => {
  return <div className="cloudNotSupportedBadge">
            <div className="cloudNotSupportedIcon">
            <svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
                <path strokeWidth="1.5" d="M6.33366 12.6666L12.3739 12.6667C13.6593 12.6667 14.7073 11.6187 14.7073 10.3334C14.7073 9.04804 13.6593 8.00003 12.3739 8.00003C12.3739 8.00003 12.3337 7.66659 12.0003 7.33325M10.667 5.33322C8.00033 2.33325 4.45395 4.78537 4.14195 6.68203C2.55728 6.7627 1.29395 8.06203 1.29395 9.6667C1.29395 11.3234 2.66699 12.6666 4.00033 12.6666" stroke="currentColor" strokeLinecap="round" strokeLinejoin="round" />
                <path strokeWidth="1.5" d="M2.66699 14L12.0003 4.66663" stroke="currentColor" strokeLinecap="round" strokeLinejoin="round" />
            </svg>

        </div>
            Not supported in ClickHouse Cloud
        </div>;
};

The YTsaurus table engine allows you to import data from a YTsaurus cluster.

<h2 id="creating-a-table">
  Creating a table
</h2>

```sql theme={null}
    CREATE TABLE [IF NOT EXISTS] [db.]table_name
    (
        name1 [type1],
        name2 [type2], ...
    ) ENGINE = YTsaurus('http_proxy_url', 'cypress_path', 'oauth_token')
```

<Info>
  This is an experimental feature that may change in backwards-incompatible ways in future releases.
  Enable usage of the YTsaurus table engine
  using setting [`allow_experimental_ytsaurus_table_engine`](/reference/settings/session-settings#allow_experimental_ytsaurus_table_engine).

  You can do so using:

  `SET allow_experimental_ytsaurus_table_engine = 1`.
</Info>

**Engine parameters**

* `http_proxy_url` — URL to the YTsaurus http proxy.
* `cypress_path` — Cypress path to the data source.
* `oauth_token` — OAuth token.

<h2 id="usage-example">
  Usage example
</h2>

Shows a query creating the YTsaurus table:

```sql title="Query" theme={null}
SHOW CREATE TABLE yt_saurus;
```

```sql title="Response" theme={null}
CREATE TABLE yt_saurus
(
    `a` UInt32,
    `b` String
)
ENGINE = YTsaurus('http://localhost:8000', '//tmp/table', 'password')
```

To return the data from the table, run:

```sql title="Query" theme={null}
SELECT * FROM yt_saurus;
```

```response title="Response" theme={null}
 ┌──a─┬─b──┐
 │ 10 │ 20 │
 └────┴────┘
```

<h2 id="data-types">
  Data types
</h2>

<h3 id="primitive-data-types">
  Primitive data types
</h3>

| YTsaurus data type          | Clickhouse data type      |
| --------------------------- | ------------------------- |
| `int8`                      | `Int8`                    |
| `int16`                     | `Int16`                   |
| `int32`                     | `Int32`                   |
| `int64`                     | `Int64`                   |
| `uint8`                     | `UInt8`                   |
| `uint16`                    | `UInt16`                  |
| `uint32`                    | `UInt32`                  |
| `uint64`                    | `UInt64`                  |
| `float`                     | `Float32`                 |
| `double`                    | `Float64`                 |
| `boolean`                   | `Bool`                    |
| `string`                    | `String`                  |
| `utf8`                      | `String`                  |
| `json`                      | `JSON`                    |
| `yson(type_v3)`             | `JSON`                    |
| `uuid`                      | `UUID`                    |
| `date32`                    | `Date`(Not supported yet) |
| `datetime64`                | `Int64`                   |
| `timestamp64`               | `Int64`                   |
| `interval64`                | `Int64`                   |
| `date`                      | `Date`(Not supported yet) |
| `datetime`                  | `DateTime`                |
| `timestamp`                 | `DateTime64(6)`           |
| `interval`                  | `UInt64`                  |
| `any`                       | `String`                  |
| `null`                      | `Nothing`                 |
| `void`                      | `Nothing`                 |
| `T` with `required = False` | `Nullable(T)`             |

<h3 id="composite-data-types">
  Composite types
</h3>

| YTsaurus data type | Clickhouse data type |
| ------------------ | -------------------- |
| `decimal`          | `Decimal`            |
| `optional`         | `Nullable`           |
| `list`             | `Array`              |
| `struct`           | `NamedTuple`         |
| `tuple`            | `Tuple`              |
| `variant`          | `Variant`            |
| `dict`             | \`Array(Tuple(...))  |
| `tagged`           | `T`                  |

**See Also**

* [ytsaurus](/reference/functions/table-functions/ytsaurus) table function
* [ytsaurus data schema](https://ytsaurus.tech/docs/en/user-guide/storage/static-schema)
* [ytsaurus data types](https://ytsaurus.tech/docs/en/user-guide/storage/data-types)
