Is it true that PDTs persisted through the persist_for parameter are built in parallel?

Is it true that PDTs persisted through the persist_for parameter are built in parallel?

• A. True
• B. False
• C. Only in production mode
• D. Only in development mode

Answer: (B)

The correct answer is that PDTs (Persistent Derived Tables) that are persisted using the persist_for parameter are not built in parallel. This means that when a PDT is rebuilt, particularly those specified with the persist_for parameter, they will be processed sequentially rather than concurrently. This behavior ensures that the integrity and order of data processing are maintained during the construction of these tables. While concurrency can be beneficial in speeding up processing times in many scenarios, the design of PDT construction prioritizes data consistency and resolves potential race conditions that could arise from parallel processing. As a result, the sequential processing is intentionally implemented to ensure that data correctness is upheld throughout the refresh cycle of PDTs.

The correct answer is that PDTs (Persistent Derived Tables) that are persisted using the persist_for parameter are not built in parallel. This means that when a PDT is rebuilt, particularly those specified with the persist_for parameter, they will be processed sequentially rather than concurrently. This behavior ensures that the integrity and order of data processing are maintained during the construction of these tables.

While concurrency can be beneficial in speeding up processing times in many scenarios, the design of PDT construction prioritizes data consistency and resolves potential race conditions that could arise from parallel processing. As a result, the sequential processing is intentionally implemented to ensure that data correctness is upheld throughout the refresh cycle of PDTs.