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| Since | 17.5 |
This node must come after a corresponding 
Block Begin Feedback node (with zero or more TOP nodes between them inside the “block”).
This node is a partitioner, and will always create one partition for each work item in the corresponding Block Begin node.
See Feedback Loops for general information on how to use this node.
Parameters
Block Begin Path
Node path of the Block Begin Feedback node this node pairs with.
Merge Operations
Defines the number of attribute merge operations to perform on the partitioner node. The operations are used to merge attributes from work items in the partition onto the partition itself. Operations are performed in descending order. Attributes are merged using the first operation with a pattern that matches the attribute.
Apply Operation
Specifies the operation to perform to merge incoming attributes onto the partition. Each operation only applies only to the subset of attributes matched using the corresponding To Attributes parameter.
The following operations are available:
Ignore
Matching attributes are ignored and will not appear on the partition.
First Value
The value of each matching attribute on the first work item in the partition is kept, and values on subsequent work items are ignored
Last Value
The value of each matching attribute on the last work item in the partition is kept.
Unique Values
The unique values for each matching attribute are merged into an array. Duplicate values are discarded.
Append to Array
The values for each matching attribute are appended to an array for that attribute. All attribute values from all work items are kept.
Minimum
The minimum value for each matching attribute is kept.
Maximum
The maximum value for each matching attribute is kept.
Sum
The sum of the values in each matching attribute is stored on the partition.
Average
The average value of each matching attribute is stored on the partition.
Mode
The most common value in each matching attribute is kept.
Median
The middle value in each matching attribute is kept.
To Attributes
Specifies which attributes the corresponding Apply Operation parameter should apply to. This field can use the Attribute Pattern Syntax to specify multiple attributes.
Preserve Arrays
By default the partitioner will flatten incoming array attributes into a single sequence of values and perform the merge operation over all values. However, when this toggle is enabled, the merge operation will preserve the original array size of the incoming attributes. The merged array size is determined by the first value found across the input work items.
Examples
NestedLoop Example for Block End Feedback TOP node
This example demonstrates how to create a nested feedback loop.
| See also |
