Amazon Redshift will no longer support the creation of new Python UDFs starting Patch 198. Existing Python UDFs will continue to function until June 30, 2026. For more information, see the [ blog post ](https://aws.amazon.com/blogs/big-data/amazon-redshift-python-user-defined-functions-will-reach-end-of-support-after-june-30-2026/). 

# TO\$1HEX function
<a name="r_TO_HEX"></a>

TO\$1HEX converts a number or binary value to a hexadecimal representation. 

## Syntax
<a name="r_TO_HEX-synopsis"></a>

```
TO_HEX(value)
```

## Arguments
<a name="r_TO_HEX-arguments"></a>

 *value*   
Either a number or binary value (`VARBYTE`) to be converted. 

## Return type
<a name="r_TO_HEX-return-type"></a>

`VARCHAR`

## Examples
<a name="r_TO_HEX-examples"></a>

To convert a number to its hexadecimal representation, use the following example. 

```
SELECT TO_HEX(2147676847);
               
+----------+
|  to_hex  |
+----------+
| 8002f2af |
+----------+
```

To convert the `VARBYTE` representation of `'abc'` to a hexadecimal number, use the followign example. 

```
SELECT TO_HEX('abc'::VARBYTE);
               
+--------+
| to_hex |
+--------+
| 616263 |
+--------+
```

To create a table, insert the `VARBYTE` representation of `'abc'` to a hexadecimal number, and select the column with the value, use the following example.

```
CREATE TABLE t (vc VARCHAR);
INSERT INTO t SELECT TO_HEX('abc'::VARBYTE);
SELECT vc FROM t;
 
+--------+
|   vc   |
+--------+
| 616263 |
+--------+
```

To show that when casting a `VARBYTE` value to `VARCHAR` the format is UTF-8, use the following example.

```
CREATE TABLE t (vc VARCHAR);
INSERT INTO t SELECT 'abc'::VARBYTE::VARCHAR;

SELECT vc FROM t;

+-----+
| vc  |
+-----+
| abc |
+-----+
```