DISTINCT

This operator de-duplicates the elements from the input stream based on a key, which is computed using an expression.

This page discusses:

See Also
Expression Language
Defining and Managing Data Queries

Input

There is one Input. There are no constraints on the element type or on the number of elements in the stream.

Output

There must be one Output. The element type must be identical to the input.

The output stream must contain as many elements as the input stream. When the input stream is sorted, the operator keeps the first of the multiple duplicates.

Example

Use the name as distinction criteria.