Amazon Redshift will no longer support the use of Python UDFs after June 30, 2026. We will start enforcing it in phases. For more information on the details of Python end of life and migration options, 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/) that was published on June 30, 2025. 

# Conditional expressions
<a name="c_conditional_expressions"></a>

**Topics**
+ [CASE conditional expression](r_CASE_function.md)
+ [DECODE function](r_DECODE_expression.md)
+ [GREATEST and LEAST functions](r_GREATEST_LEAST.md)
+ [NVL and COALESCE functions](r_NVL_function.md)
+ [NVL2 function](r_NVL2.md)
+ [NULLIF function](r_NULLIF_function.md)

Amazon Redshift supports some conditional expressions that are extensions to the SQL standard.