What is the outcome when trying to insert a violating record into a Delta table with CHECK constraints?

When inserting a record into a Delta table that has CHECK constraints, the process is designed to ensure data integrity by enforcing certain rules on the data. When a record violates these constraints, the entire write operation is halted, resulting in a failure due to the constraint violations. This means that no records—whether they meet the constraints or not—are written to the table during that operation. The Delta Lake format ensures that the integrity of the table is maintained by rejecting operations that do not comply with the defined constraints.

This strict enforcement of constraints is critical in database management, as it prevents the introduction of bad data that does not conform to the rules governing the structure and quality of the dataset. In contrast, other potential outcomes would result in partial success, which could lead to data inconsistencies and violate the principles of reliable data management. Therefore, the write operation fails completely if any record violates the CHECK constraints, upholding the integrity of the data stored in the Delta table.