from pyspark.sql import functions as F
.withWatermark("timestamp","1 minute") \
.groupby(F.window("timestamp","1 day"),*groupby_cols) \
query = frame.writeStream \
It prints out a bunch of aggregated rows to console. When I run the same query with outputMode("append") however, the output only has the column names, no rows. I was originally trying to output to parquet, which only supports append mode. I was seeing no data in my parquet files, so I switched to console output to debug, then noticed this issue. Am I misunderstanding something about how append mode works?