sql functions: row_number, percent_rank, rank,rowNumber

[AlexModestov <Al...@gmail.com>]

Hello all,
I try to use some sql functions.
My task to renumber rows in DataFrame.
I use sql functions but they don't work and I don;t understand why.
I would appreciate you help to fix this issue.
Thank you!
The piece of my code:

"from pyspark.sql.functions import row_number, percent_rank, rank,
randn,rowNumber
res_sorted.select(rowNumber()).head(10)"

res_sorted - is a sorted dataframe.
The error is:

"AnalysisException: u"unresolved operator 'Project ['row_number() AS
'row_number()#2848];""



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