I would like to use a window function in Scala.
I have a CSV file which is the following one :
id;date;value1
1;63111600000;100
1;63111700000;200
1;63154800000;300
When I try to apply a window function over this data frame, sometimes it works and sometimes it fails:
val df = loadCSVFile()
val tw = Window.orderBy(date).partitionBy(id).rangeBetween(-5356800000,0)
df.withColumn(value1___min_2_month, min(df.col("value1")).over(tw))
+---+-----------+--------------------+
| id| date|value1___min_2_month|
+---+-----------+--------------------+
| 1|63111600000| 100|
| 1|63111700000| 100|
| 1|63154800000| 100|
+---+-----------+--------------------+
So it works ! But when I try with a bigger number (which contains row of the previous exemple) I have the following result
val tw =
Window.orderBy(date).partitionBy(id).rangeBetween(-8035200000,0) \n
df.withColumn(value1___min_3_month, min(df.col("value1")).over(tw))
+---+-----------+--------------------+
| id| date|value1___min_3_month|
+---+-----------+--------------------+
| 1|63111600000| null|
| 1|63111700000| null|
| 1|63154800000| null|
+---+-----------+--------------------+