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Kent Yao 88ae6c4481 [SPARK-31189][SQL][DOCS] Fix errors and missing parts for datetime pattern document 
### What changes were proposed in this pull request?

Fix errors and missing parts for datetime pattern document
1. The pattern we use is similar to DateTimeFormatter and SimpleDateFormat but not identical. So we shouldn't use any of them in the API docs but use a link to the doc of our own.
2. Some pattern letters are missing
3. Some pattern letters are explicitly banned - Set('A', 'c', 'e', 'n', 'N')
4. the second fraction pattern different logic for parsing and formatting

### Why are the changes needed?

fix and improve doc
### Does this PR introduce any user-facing change?

yes, new and updated doc
### How was this patch tested?

pass Jenkins
viewed locally with `jekyll serve`
![image](https://user-images.githubusercontent.com/8326978/77044447-6bd3bb00-69fa-11ea-8d6f-7084166c5dea.png)

Closes #27956 from yaooqinn/SPARK-31189.

Authored-by: Kent Yao <yaooqinn@hotmail.com>
Signed-off-by: Wenchen Fan <wenchen@databricks.com>
2020-03-20 21:59:26 +08:00
..
ml [SPARK-30930][ML] Remove ML/MLLIB DeveloperApi annotations 2020-03-16 12:41:22 -05:00
mllib [SPARK-30930][ML] Remove ML/MLLIB DeveloperApi annotations 2020-03-16 12:41:22 -05:00
sql [SPARK-31189][SQL][DOCS] Fix errors and missing parts for datetime pattern document 2020-03-20 21:59:26 +08:00
streaming [SPARK-28980][CORE][SQL][STREAMING][MLLIB] Remove most items deprecated in Spark 2.2.0 or earlier, for Spark 3 2019-09-09 10:19:40 -05:00
testing [SPARK-30434][PYTHON][SQL] Move pandas related functionalities into 'pandas' sub-package 2020-01-09 10:22:50 +09:00
tests [SPARK-30969][CORE] Remove resource coordination support from Standalone 2020-03-02 11:23:07 -08:00
__init__.py [SPARK-28980][CORE][SQL][STREAMING][MLLIB] Remove most items deprecated in Spark 2.2.0 or earlier, for Spark 3 2019-09-09 10:19:40 -05:00
_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-28206][PYTHON] Remove the legacy Epydoc in PySpark API documentation 2019-07-05 10:08:22 -07:00
broadcast.py [SPARK-29341][PYTHON] Upgrade cloudpickle to 1.0.0 2019-10-03 19:20:51 +09:00
cloudpickle.py [SPARK-29536][PYTHON] Upgrade cloudpickle to 1.1.1 to support Python 3.8 2019-10-22 16:18:34 +09:00
conf.py [SPARK-28206][PYTHON] Remove the legacy Epydoc in PySpark API documentation 2019-07-05 10:08:22 -07:00
context.py [SPARK-22340][PYTHON][FOLLOW-UP] Add a better message and improve documentation for pinned thread mode 2019-11-21 10:54:01 +09:00
daemon.py [SPARK-26175][PYTHON] Redirect the standard input of the forked child to devnull in daemon 2019-07-31 09:10:24 +09:00
files.py [SPARK-28206][PYTHON] Remove the legacy Epydoc in PySpark API documentation 2019-07-05 10:08:22 -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-22340][PYTHON] Add a mode to pin Python thread into JVM's 2019-11-08 06:44:58 +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-29499][CORE][PYSPARK] Add mapPartitionsWithIndex for RDDBarrier 2019-10-23 13:46:09 +02:00
rddsampler.py [SPARK-4897] [PySpark] Python 3 support 2015-04-16 16:20:57 -07:00
resourceinformation.py [SPARK-28234][CORE][PYTHON] Add python and JavaSparkContext support to get resources 2019-07-11 09:32:58 +09:00
resultiterable.py [SPARK-30205][PYSPARK] Import ABCs from collections.abc to remove deprecation warnings 2019-12-10 11:08:13 -08:00
serializers.py [SPARK-30434][PYTHON][SQL] Move pandas related functionalities into 'pandas' sub-package 2020-01-09 10:22:50 +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-30667][CORE] Add all gather method to BarrierTaskContext 2020-02-21 11:40:28 -08:00
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-22340][PYTHON][FOLLOW-UP] Add a better message and improve documentation for pinned thread mode 2019-11-21 10:54:01 +09:00
version.py [SPARK-30950][BUILD] Setting version to 3.1.0-SNAPSHOT 2020-02-25 19:44:31 -08:00
worker.py [SPARK-30812][SQL][CORE] Revise boolean config name to comply with new config naming policy 2020-02-18 20:39:50 +08:00