View a markdown version of this page

Load data is incorrect - Amazon Redshift
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 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 that was published on June 30, 2025.

Load data is incorrect

Your COPY operation can load incorrect data in the following ways. We suggest the following troubleshooting approaches.

Wrong files are loaded

Using an object prefix to specify data files can cause unwanted files to be read. Instead, use a manifest file to specify exactly which files to load. For more information, see the copy_from_s3_manifest_file option for the COPY command and Example: COPY from Amazon S3 using a manifest in the COPY examples.