How to propagate Non-Empty Value in SPARQL Dataset

Dear All, I am trying to propagate the last valid observation (e.g. not null) to the null values in a dataset. Below I reported the partial solution: Dataset tmp800=tmp700.select("uuid", "eventTime", "Washer_rinseCycles"); WindowSpec wspec= Window.partitionBy(tmp800.col("uuid")).or

How to propagate Non-Empty Value in SPARQL Dataset

Dear All, I am trying to propagate the last valid observation (e.g. not null) to the null values in a dataset. Below I reported the partial solution: Dataset tmp800=tmp700.select("uuid", "eventTime", "Washer_rinseCycles"); WindowSpec wspec= Window.partitionBy(tmp800.col("uuid")).or