DEA-C02 Exam Dumps | You have a Snowflake Task that is designed to transform and load data into a target table. The task relies

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Question 85/149

You have a Snowflake Task that is designed to transform and load data into a target table. The task relies on a Stream to detect changes in a source table. However, you notice that the task is intermittently failing with a 'Stream STALE' error, even though the data in the source table is continuously updated. What are the most likely root causes and the best combination of solutions to prevent this issue? (Select TWO)

A. The Stream is not configured with 'SHOW INITIAL ROWS = TRUE, causing initial changes to be missed and eventually leading to staleness. Recreate the stream with this parameter set to TRUE.

B. The Task is not running frequently enough, causing the Stream to accumulate too many changes before being consumed, exceeding its retention period. Increase the task's execution frequency or increase the stream's 'DATA RETENTION TIME IN DAYS

C. The source table is being modified with DDL operations (e.g., ALTER TABLE ADD COLUMN), which are not supported by Streams. Use Table History to track schema changes and manually adjust the Stream's query if needed. Use 'COPY GRANTS' during the DDL.

D. The Stream has reached its maximum age (default 14 days) and expired. There is no way to recover data from an expired Stream. You need to recreate the Stream and reload the source table.

E. DML operations (e.g., UPDATE, DELETE) being performed on the source table are affecting rows older than the Stream's retention period. Reduce the stream's 'DATA RETENTION TIME IN DAYS' to match the oldest DML operation on the source table.

Correct Answer: B,C

A Stream becomes stale if its offset is beyond the retention period. If the task isn't running often enough (B), the Stream can exceed the retention period before being consumed. DDL operations (C) invalidate Streams. Option A is incorrect because SHOW INITIAL ROWS only impacts the first read, not staleness. D is partially incorrect. While Streams do have a maximum age, increasing the retention period or running the task more frequently is preferred. E is wrong because decreasing retention won't help prevent the error and only lead to data losses.

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