CloudTrail Partitioner is a tool that automates the setup and management of partitioned Amazon Athena tables for AWS CloudTrail logs. The tool creates partitioned tables for each AWS account in the format cloudtrail_000000000000 and generates a unified view that combines all account tables. The solution includes automated nightly partition updates through a CDK (Cloud Development Kit) application that runs at 0600 UTC daily. When deployed manually, it creates 90 days of historical partitions, while the automated nightly process creates partitions for the current day and the following day. The tool is designed to improve query performance and cost efficiency when analyzing CloudTrail logs in Athena by organizing data into time-based partitions. It supports multi-account environments by creating separate tables for each account while providing a consolidated view for cross-account analysis. The project is based on Alex Smolen's work on partitioning CloudTrail logs and is suitable for organizations with moderate CloudTrail log volumes (up to approximately 100GB). For larger scale deployments, the creator recommends using the cloudtrail-parquet-glue project which addresses scalability limitations.