I am almost blocked for a month I am still figuring out the API to achieve one of the functionalities related to spark structured streaming with window grouping. So I thought to reach you guys here.
What I have is stock related time series data and I have grouped them in a 1-minute window along with the stock name. I am able to get first, last row in that 1-minute group, but I want some values from the second row of that 1 minute window, which I am not able to do at all. I looked at each function related to aggregation but I could not find any.Please help me.
This is what I have done so far -
val aggregates = stockEvents
.withWatermark("timestamp", "5 seconds")
.groupBy(window($"timestamp", "1 minute", "1 minute", "0 seconds"), $"stockName")
first("tradingprice").alias("open"), //I have to make this value coming from second row