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What to do with the output of a lookup activity?
Lookup activity reads and returns the content of a configuration file or table. It also returns the result of executing a query or stored procedure. The output from Lookup activity can be used in a subsequent copy or transformation activity if it’s a singleton value. The output can be used in a ForEach activity if it’s an array of attributes.
How long does lookup activity last before timeout?
The longest duration for Lookup activity before timeout is 24 hours. When you use query or stored procedure to lookup data, make sure to return one and exact one result set. Otherwise, Lookup activity fails. The following data sources are supported for Lookup activity.
When does lookup activity fail in Azure Data Factory?
The Lookup activity output supports up to 4 MB in size, activity will fail if the size exceeds the limit. The longest duration for Lookup activity before timeout is 24 hours. When you use query or stored procedure to lookup data, make sure to return one and exact one result set. Otherwise, Lookup activity fails.
How many rows can a lookup activity return?
The output can be a singleton value or an array of attributes, which can be consumed in a subsequent copy, transformation, or control flow activities like ForEach activity. The Lookup activity can return up to 5000 rows; if the result set contains more records, the first 5000 rows will be returned.
What is the effect of skew in a table?
Skew leads to poor CPU parallel efficiency for full table scans and bulk inserts. The AMP with the most data sets forms a bottleneck. The remaining AMPs must wait for the slowest AMP. Skew increases the number of IOs for updates and inserts of biased values.
What does it mean when option price is skewed?
The skew is a valuable indicator that shows option trader’s biases towards the stock. Whatever notion you may have regarding the impending direction of a stock’s price, check the volatility skew first, and see where the option traders are putting their money. Volatility Skew charts are only available to registered members.