LazyEvaluation of the "Lift" function.

[tuterbatuhan]

Hey,
"Lift" function is lazily evaluated by calling the getAggValues() function, as it can be seen here:

scotty-window-processor/flink-connector/src/main/java/de/tub/dima/scotty/flinkconnector/demo/FlinkQuantileDemo.java

Lines 28 to 32 in a18a7dc

	stream
	.keyBy(0)
	.process(windowOperator)
	.map(x -> x.getAggValues().get(0).f1)
	.print();

You may consider triggering the "Lift" function when a window ends, instead of adding another operator for lazy evaluation.

[PhilippGrulich]

Hi @tuterbatuhan,

we will consider this for future versions of Scotty.

Best,
Philipp

[jiayuasu]

Hi all, I wonder why this getAggValues() is lazily evaluated? Due to some performance concern?

[julianev]

Hi @jiayuasu,
The lazy evaluation, in this case, is related to the quantile computation. We do not expect a great performance benefit from changing it. If you have further questions, please feel free to contact us!

Best,
Juliane