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/). 

# Basic elements
<a name="c_Basic_elements"></a>

**Topics**
+ [Names and identifiers](r_names.md)
+ [Literals](r_Literals.md)
+ [Nulls](r_Nulls.md)
+ [Data types](c_Supported_data_types.md)
+ [Collation sequences](c_collation_sequences.md)

This section covers the rules for working with database object names, literals, nulls, and data types.