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/). 

# Hash functions
<a name="hash-functions"></a>

**Topics**
+ [CHECKSUM function](r_CHECKSUM.md)
+ [farmFingerprint64 function](r_FARMFINGERPRINT64.md)
+ [FUNC\$1SHA1 function](FUNC_SHA1.md)
+ [FNV\$1HASH function](r_FNV_HASH.md)
+ [MD5 function](r_MD5.md)
+ [SHA function](SHA.md)
+ [SHA1 function](SHA1.md)
+ [SHA2 function](SHA2.md)
+ [MURMUR3\$132\$1HASH](MURMUR3_32_HASH.md)

A hash function is a mathematical function that converts a numerical input value into another value.