'Airflow Operator BigQueryTablePartitionExistenceSensor Question

I'm trying to use this BigQueryTablePartitionExistenceSensor operator in Airflow and I was wondering if this operator checks whether the partition is fully loaded or can potentially mark to success even if the data isn't complete yet.

For example, if my table is partitioned on DAY and the load for 20220420 has started but isn't complete, would this sensor trigger? Or, would it wait until that load step has been completed before marking the sensor to success?

Thanks



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