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| author | Davies Liu <davies@databricks.com> | 2015-08-14 13:55:29 -0700 |
|---|---|---|
| committer | Reynold Xin <rxin@databricks.com> | 2015-08-14 13:55:29 -0700 |
| commit | 11ed2b180ec86523a94679a8b8132fadb911ccd5 (patch) | |
| tree | 308f29be0ed48ffbff823fdacd0f37410af1a869 /python/pyspark/sql/functions.py | |
| parent | 9407baa2a7c26f527f2d043715d313d75bd765bb (diff) | |
| download | spark-11ed2b180ec86523a94679a8b8132fadb911ccd5.tar.gz spark-11ed2b180ec86523a94679a8b8132fadb911ccd5.tar.bz2 spark-11ed2b180ec86523a94679a8b8132fadb911ccd5.zip | |
[SPARK-9978] [PYSPARK] [SQL] fix Window.orderBy and doc of ntile()
Author: Davies Liu <davies@databricks.com>
Closes #8213 from davies/fix_window.
Diffstat (limited to 'python/pyspark/sql/functions.py')
| -rw-r--r-- | python/pyspark/sql/functions.py | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/python/pyspark/sql/functions.py b/python/pyspark/sql/functions.py index e98979533f..41dfee9f54 100644 --- a/python/pyspark/sql/functions.py +++ b/python/pyspark/sql/functions.py @@ -530,9 +530,10 @@ def lead(col, count=1, default=None): @since(1.4) def ntile(n): """ - Window function: returns a group id from 1 to `n` (inclusive) in a round-robin fashion in - a window partition. Fow example, if `n` is 3, the first row will get 1, the second row will - get 2, the third row will get 3, and the fourth row will get 1... + Window function: returns the ntile group id (from 1 to `n` inclusive) + in an ordered window partition. Fow example, if `n` is 4, the first + quarter of the rows will get value 1, the second quarter will get 2, + the third quarter will get 3, and the last quarter will get 4. This is equivalent to the NTILE function in SQL. |