Explanation:
Delta Lake maintains data integrity by enforcing constraints at the time of the write operation. If a transaction attempts to insert or update data that violates a NOT NULL or CHECK constraint, the operation will fail, and the data will not be committed. This ensures that all data residing in the table meets the defined quality standards.
Ultimate access to all questions.
When implementing data quality constraints on a Delta table, how does Delta Lake ensure compliance with these rules?
A
By validating constraints asynchronously during file compaction (the OPTIMIZE command).
B
By checking constraints at query execution time to filter out invalid records from the result set.
C
By rejecting any write operation that contains data violating the specified constraint criteria.
D
By applying constraints retroactively to all existing historical data stored in the transaction log.
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