Inspecting the directory structure involves using the DESCRIBE DETAIL command to view the partition columns and their values, which is crucial for understanding data distribution and optimizing query performance.

Delta Lake does not allow inspection of its directory structure, making it impossible to optimize data storage or query performance.

Inspecting the directory structure is done by directly navigating the file system, which provides insights into how data is partitioned and stored, aiding in performance tuning and data management.

The directory structure of Delta Lake files is automatically optimized and does not require manual inspection or management.