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/). 

# STRTOL function
<a name="r_STRTOL"></a>

Converts a string expression of a number of the specified base to the equivalent integer value. The converted value must be within the signed 64-bit range. 

## Syntax
<a name="r_STRTOL-syntax"></a>

```
STRTOL(num_string, base)
```

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

 *num\$1string*   
String expression of a number to be converted. If *num\$1string* is empty ( `''` ) or begins with the null character (`'\0'`), the converted value is `0`. If *num\$1string* is a column containing a NULL value, STRTOL returns `NULL`. The string can begin with any amount of white space, optionally followed by a single plus '`+`' or minus '`-`' sign to indicate positive or negative. The default is '`+`'. If *base* is `16`, the string can optionally begin with '`0x`'. 

*base*  
`INTEGER` between 2 and 36.

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

BIGINT  
If *num\$1string* is null, the function returns `NULL`.

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

To convert string and base value pairs to integers, use the following examples.

```
SELECT STRTOL('0xf',16);

+--------+
| strtol |
+--------+
|     15 |
+--------+

SELECT STRTOL('abcd1234',16);

+------------+
|   strtol   |
+------------+
| 2882343476 |
+------------+

SELECT STRTOL('1234567', 10);

+---------+
| strtol  |
+---------+
| 1234567 |
+---------+

SELECT STRTOL('1234567', 8);

+--------+
| strtol |
+--------+
| 342391 |
+--------+

SELECT STRTOL('110101', 2);

+--------+
| strtol |
+--------+
|     53 |
+--------+

SELECT STRTOL('\0', 2);

+--------+
| strtol |
+--------+
|      0 |
+--------+
```