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tools4origins 25c5d57883 [MINOR][DOC] Fix python variance() documentation 
## What changes were proposed in this pull request?

The Python documentation incorrectly says that `variance()` acts as `var_pop` whereas it acts like `var_samp` here: https://spark.apache.org/docs/latest/api/python/pyspark.sql.html#pyspark.sql.functions.variance

It was not the case in Spark 1.6 doc but it is in Spark 2.0 doc:
https://spark.apache.org/docs/1.6.0/api/java/org/apache/spark/sql/functions.html
https://spark.apache.org/docs/2.0.0/api/java/org/apache/spark/sql/functions.html

The Scala documentation is correct: https://spark.apache.org/docs/latest/api/java/org/apache/spark/sql/functions.html#variance-org.apache.spark.sql.Column-

The alias is set on this line:
https://github.com/apache/spark/blob/v2.4.3/sql/core/src/main/scala/org/apache/spark/sql/functions.scala#L786

## How was this patch tested?
Using variance() in pyspark 2.4.3 returns:
```
>>> spark.createDataFrame([(1, ), (2, ), (3, )], "a: int").select(variance("a")).show()
+-----------+
|var_samp(a)|
+-----------+
|        1.0|
+-----------+
```

Closes #24895 from tools4origins/patch-1.

Authored-by: tools4origins <tools4origins@gmail.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>
2019-06-20 08:10:19 -07:00
..
ml [SPARK-28044][ML][PYTHON] MulticlassClassificationEvaluator support more metrics 2019-06-19 08:56:15 -05:00
mllib [SPARK-27540][MLLIB] Add 'meanAveragePrecision_at_k' metric to RankingMetrics 2019-05-09 08:47:05 -05:00
sql [MINOR][DOC] Fix python variance() documentation 2019-06-20 08:10:19 -07:00
streaming [SPARK-26856][PYSPARK] Python support for from_avro and to_avro APIs 2019-03-11 10:15:07 +09:00
testing Revert "[SPARK-27870][SQL][PYSPARK] Flush batch timely for pandas UDF (for improving pandas UDFs pipeline)" 2019-06-09 08:28:31 -07:00
tests Revert "[SPARK-27870][SQL][PYSPARK] Flush batch timely for pandas UDF (for improving pandas UDFs pipeline)" 2019-06-09 08:28:31 -07:00
__init__.py [SPARK-25248][.1][PYSPARK] update barrier Python API 2018-08-29 07:22:03 -07:00
_globals.py [SPARK-23328][PYTHON] Disallow default value None in na.replace/replace when 'to_replace' is not a dictionary 2018-02-09 14:21:10 +08:00
accumulators.py [SPARK-25591][PYSPARK][SQL] Avoid overwriting deserialized accumulator 2018-10-08 15:18:08 +08:00
broadcast.py [SPARK-18161][PYTHON] Update cloudpickle to v0.6.1 2019-02-02 10:49:45 +08:00
cloudpickle.py [SPARK-27000][PYTHON] Upgrades cloudpickle to v0.8.0 2019-02-28 02:33:10 +09:00
conf.py [SPARK-23522][PYTHON] always use sys.exit over builtin exit 2018-03-08 20:38:34 +09:00
context.py [SPARK-27887][PYTHON] Add deprecation warning for Python 2 2019-06-04 15:36:52 +09:00
daemon.py [SPARK-27870][SQL][PYTHON] Add a runtime buffer size configuration for Pandas UDFs 2019-06-15 20:56:22 +09:00
files.py [SPARK-3309] [PySpark] Put all public API in __all__ 2014-09-03 11:49:45 -07:00
find_spark_home.py Fix typos detected by github.com/client9/misspell 2018-08-11 21:23:36 -05:00
heapq3.py Fix typos detected by github.com/client9/misspell 2018-08-11 21:23:36 -05:00
java_gateway.py [SPARK-27870][SQL][PYTHON] Add a runtime buffer size configuration for Pandas UDFs 2019-06-15 20:56:22 +09:00
join.py [SPARK-14202] [PYTHON] Use generator expression instead of list comp in python_full_outer_jo… 2016-03-28 14:51:36 -07:00
profiler.py [SPARK-26640][CORE][ML][SQL][STREAMING][PYSPARK] Code cleanup from lgtm.com analysis 2019-01-17 19:40:39 -06:00
rdd.py [SPARK-26412][PYSPARK][SQL] Allow Pandas UDF to take an iterator of pd.Series or an iterator of tuple of pd.Series 2019-06-15 08:29:20 -07:00
rddsampler.py [SPARK-4897] [PySpark] Python 3 support 2015-04-16 16:20:57 -07:00
resultiterable.py [SPARK-3074] [PySpark] support groupByKey() with single huge key 2015-04-09 17:07:23 -07:00
serializers.py [SPARK-28041][PYTHON] Increase minimum supported Pandas to 0.23.2 2019-06-18 09:10:58 +09:00
shell.py [SPARK-25238][PYTHON] lint-python: Fix W605 warnings for pycodestyle 2.4 2018-09-13 11:19:43 +08:00
shuffle.py [SPARK-25696] The storage memory displayed on spark Application UI is… 2018-12-10 18:27:01 -06:00
statcounter.py [SPARK-6919] [PYSPARK] Add asDict method to StatCounter 2015-09-29 13:38:15 -07:00
status.py [SPARK-4172] [PySpark] Progress API in Python 2015-02-17 13:36:43 -08:00
storagelevel.py [SPARK-25908][CORE][SQL] Remove old deprecated items in Spark 3 2018-11-07 22:48:50 -06:00
taskcontext.py [SPARK-26640][CORE][ML][SQL][STREAMING][PYSPARK] Code cleanup from lgtm.com analysis 2019-01-17 19:40:39 -06:00
traceback_utils.py [SPARK-1087] Move python traceback utilities into new traceback_utils.py file. 2014-09-15 19:28:17 -07:00
util.py [SPARK-26856][PYSPARK] Python support for from_avro and to_avro APIs 2019-03-11 10:15:07 +09:00
version.py [SPARK-25592] Setting version to 3.0.0-SNAPSHOT 2018-10-02 08:48:24 -07:00
worker.py [SPARK-26412][PYSPARK][SQL] Allow Pandas UDF to take an iterator of pd.Series or an iterator of tuple of pd.Series 2019-06-15 08:29:20 -07:00