Examples with GroupCombineProperties org.apache.flink.optimizer.operators.GroupCombineProperties used on opensource projects

Example 1 with GroupCombineProperties

use of org.apache.flink.optimizer.operators.GroupCombineProperties in project flink by apache.

the class GroupCombineNode method initPossibleProperties.

private List<OperatorDescriptorSingle> initPossibleProperties() {
    // check if we can work with a grouping (simple reducer), or if we need ordering because of a group order
    Ordering groupOrder = getOperator().getGroupOrder();
    if (groupOrder != null && groupOrder.getNumberOfFields() == 0) {
        groupOrder = null;
    }
    OperatorDescriptorSingle props = (this.keys == null ? new AllGroupCombineProperties() : new GroupCombineProperties(this.keys, groupOrder));
    return Collections.singletonList(props);
}