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Takuya UESHIN 43fdd1271e [SPARK-33489][PYSPARK] Add NullType support for Arrow executions 
### What changes were proposed in this pull request?

Adds `NullType` support for Arrow executions.

### Why are the changes needed?

As Arrow supports null type, we can convert `NullType` between PySpark and pandas with Arrow enabled.

### Does this PR introduce _any_ user-facing change?

Yes, if a user has a DataFrame including `NullType`, it will be able to convert with Arrow enabled.

### How was this patch tested?

Added tests.

Closes #31285 from ueshin/issues/SPARK-33489/arrow_nulltype.

Authored-by: Takuya UESHIN <ueshin@databricks.com>
Signed-off-by: HyukjinKwon <gurwls223@apache.org>
2021-01-25 11:34:47 +09:00
..
avro [SPARK-32320][PYSPARK] Remove mutable default arguments 2020-12-08 09:35:36 +08:00
pandas [SPARK-33489][PYSPARK] Add NullType support for Arrow executions 2021-01-25 11:34:47 +09:00
tests [SPARK-33489][PYSPARK] Add NullType support for Arrow executions 2021-01-25 11:34:47 +09:00
__init__.py [SPARK-32138] Drop Python 2.7, 3.4 and 3.5 2020-07-14 11:22:44 +09:00
__init__.pyi [SPARK-32714][PYTHON] Initial pyspark-stubs port 2020-09-24 14:15:36 +09:00
_typing.pyi [SPARK-32714][PYTHON] Initial pyspark-stubs port 2020-09-24 14:15:36 +09:00
catalog.py [SPARK-33730][PYTHON] Standardize warning types 2021-01-18 09:32:55 +09:00
catalog.pyi [SPARK-32714][PYTHON] Initial pyspark-stubs port 2020-09-24 14:15:36 +09:00
column.py [SPARK-33730][PYTHON] Standardize warning types 2021-01-18 09:32:55 +09:00
column.pyi [SPARK-33457][PYTHON] Adjust mypy configuration 2020-11-25 09:27:04 +09:00
conf.py [SPARK-32138] Drop Python 2.7, 3.4 and 3.5 2020-07-14 11:22:44 +09:00
conf.pyi [SPARK-32714][PYTHON] Initial pyspark-stubs port 2020-09-24 14:15:36 +09:00
context.py [SPARK-33730][PYTHON] Standardize warning types 2021-01-18 09:32:55 +09:00
context.pyi [SPARK-33457][PYTHON] Adjust mypy configuration 2020-11-25 09:27:04 +09:00
dataframe.py [SPARK-33730][PYTHON] Standardize warning types 2021-01-18 09:32:55 +09:00
dataframe.pyi [SPARK-33250][PYTHON][DOCS] Migration to NumPy documentation style in SQL (pyspark.sql.*) 2020-11-03 10:00:49 +09:00
functions.py [SPARK-33730][PYTHON] Standardize warning types 2021-01-18 09:32:55 +09:00
functions.pyi [SPARK-34191][PYTHON][SQL] Add typing for udf overload 2021-01-22 21:19:20 +09:00
group.py [SPARK-33250][PYTHON][DOCS] Migration to NumPy documentation style in SQL (pyspark.sql.*) 2020-11-03 10:00:49 +09:00
group.pyi [SPARK-32714][PYTHON] Initial pyspark-stubs port 2020-09-24 14:15:36 +09:00
readwriter.py [SPARK-33978][SQL] Support ZSTD compression in ORC data source 2021-01-04 00:54:47 -08:00
readwriter.pyi [SPARK-33566][CORE][SQL][SS][PYTHON] Make unescapedQuoteHandling option configurable when read CSV 2020-11-27 15:47:39 +09:00
session.py [SPARK-33989][SQL] Strip auto-generated cast when using Cast.sql 2021-01-14 15:27:14 +00:00
session.pyi [SPARK-33457][PYTHON] Adjust mypy configuration 2020-11-25 09:27:04 +09:00
streaming.py [SPARK-33659][SS] Document the current behavior for DataStreamWriter.toTable API 2020-12-24 12:44:37 +09:00
streaming.pyi [SPARK-33836][SS][PYTHON] Expose DataStreamReader.table and DataStreamWriter.toTable 2020-12-21 19:42:59 +09:00
types.py [SPARK-33250][PYTHON][DOCS] Migration to NumPy documentation style in SQL (pyspark.sql.*) 2020-11-03 10:00:49 +09:00
types.pyi [SPARK-33457][PYTHON] Adjust mypy configuration 2020-11-25 09:27:04 +09:00
udf.py [SPARK-33250][PYTHON][DOCS] Migration to NumPy documentation style in SQL (pyspark.sql.*) 2020-11-03 10:00:49 +09:00
udf.pyi [SPARK-33457][PYTHON] Adjust mypy configuration 2020-11-25 09:27:04 +09:00
utils.py Spelling r common dev mlib external project streaming resource managers python 2020-11-27 10:22:45 -06:00
window.py [SPARK-33250][PYTHON][DOCS] Migration to NumPy documentation style in SQL (pyspark.sql.*) 2020-11-03 10:00:49 +09:00
window.pyi [SPARK-33250][PYTHON][DOCS] Migration to NumPy documentation style in SQL (pyspark.sql.*) 2020-11-03 10:00:49 +09:00