![]() delete(_:) will trigger the Delete Rules for Delete the object with a relationship. Only deleting the parent object will trigger a Cascade Delete Rule: let object = // An NSManagedObject Setting a relationship to nil like ems = nil or removing objects from a relationship will not trigger a Delete Rule. Set a Delete Rule on Entity Relationships inside of the Core Data Entity Inspector in Xcode: Entity Inspector In Xcode Setting A Cascade Delete RuleĪ Delete Rule will only take effect and consider relationships when an object is deleted. Save the deletions to the persistent storeĭelete Object With Relationship (Cascade Delete Rule)Ī Delete Rule defines what happens to relationship objects when an object is deleted, and a Cascade Delete Rule will delete relationship objects automatically when the parent object is deleted. Let context = persistentContainer.viewContext Get a reference to a managed object context Use the Merge Transformation Editor to specify columns from two sorted sets of data to be merged.One way to delete multiple objects in Core Data is to call delete(_:) on a NSManagedObjectContext for each NSManagedObject to delete, and then save the NSManagedObjectContext: // List of multiple objects to delete Sort Data for the Merge and Merge Join Transformations Set the Properties of a Data Flow Component ![]() You can set properties through the SSIS Designer or programmatically.įor more information about the properties that you can programmatically, click one of the following topics:įor details about how to set properties, see the following topics: Configuration of the Merge Transformation This transformation has two inputs and one output. You can then manually map other columns that have compatible data types. In the SSIS Designer, the user interface for the Merge transformation automatically maps columns that have the same metadata. If the data has a string data type, the length of the column in the second input must be less than or equal to the length of the column in the first input with which it is merged. For example, you cannot merge a column that has a numeric data type with a column that has a character data type. The Merge transformation also requires that the merged columns in its inputs have matching metadata. For more information about this important requirement, see Sort Data for the Merge and Merge Join Transformations. The Merge Transformation requires sorted data for its inputs. The transformation has more than two inputs. The combined output does not need to be sorted. The transformation inputs are not sorted. Use the Union All transformation instead of the Merge transformation in the following situations: The Merge transformation is similar to the Union All transformations. Remerge rows after correcting errors in the data. Merge data from two data sources, such as tables and files.Ĭreate complex datasets by nesting Merge transformations. The rows from each dataset are inserted into the output based on values in their key columns.īy including the Merge transformation in a data flow, you can perform the following tasks: The Merge transformation combines two sorted datasets into a single dataset. SSIS Integration Runtime in Azure Data Factory
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