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://amazonaws-china.com/blogs/big-data/amazon-redshift-python-user-defined-functions-will-reach-end-of-support-after-june-30-2026/). 

# Amazon Redshift SQL
<a name="c_redshift-sql"></a>

**Topics**
+ [SQL functions supported on the leader node](c_sql-functions-leader-node.md)
+ [Amazon Redshift and PostgreSQL](c_redshift-and-postgres-sql.md)

Amazon Redshift is built around industry-standard SQL, with added functionality to manage very large datasets and support high-performance analysis and reporting of those data.

**Note**  
The maximum size for a single Amazon Redshift SQL statement is 16 MB.