Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Amazon Redshift will no longer support the creation of new Python UDFs starting November 1, 2025. If you would like to use Python UDFs, create the UDFs prior to that date. Existing Python UDFs will continue to function as normal. For more information, see the blog post .

Troubleshooting issues for Amazon Redshift Data API

Use the following sections, titled with common error messages, to help troubleshoot problems that you have with the Data API.

Packet for query is too large

If you see an error indicating that the packet for a query is too large, generally the result set returned for a row is too large. The Data API size limit is 64 KB per row in the result set returned by the database.

To solve this issue, make sure that each row in a result set is 64 KB or less.

Database response exceeded size limit

If you see an error indicating that the database response has exceeded the size limit, generally the size of the result set returned by the database was too large. The Data API limit is 100 MB in the result set returned by the database.

To solve this issue, make sure that calls to the Data API return 100 MB of data or less. If you need to return more than 100 MB, you can run multiple statement calls with the LIMIT clause in your query.