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Sean Owen 8d87252087 [SPARK-16409][SQL] regexp_extract with optional groups causes NPE 
## What changes were proposed in this pull request?

regexp_extract actually returns null when it shouldn't when a regex matches but the requested optional group did not. This makes it return an empty string, as apparently designed.

## How was this patch tested?

Additional unit test

Author: Sean Owen <sowen@cloudera.com>

Closes #14504 from srowen/SPARK-16409.
2016-08-07 12:20:07 +01:00
..
ml [SPARK-16831][PYTHON] Fixed bug in CrossValidator.avgMetrics 2016-08-03 04:18:28 -07:00
mllib [SPARK-14817][ML][MLLIB][DOC] Made DataFrame-based API primary in MLlib guide 2016-07-15 13:38:23 -07:00
sql [SPARK-16409][SQL] regexp_extract with optional groups causes NPE 2016-08-07 12:20:07 +01:00
streaming [MINOR] Fix Typos 'an -> a' 2016-06-06 09:35:47 +01:00
__init__.py [SPARK-14555] First cut of Python API for Structured Streaming 2016-04-20 10:32:01 -07:00
accumulators.py [SPARK-8652] [PYSPARK] Check return value for all uses of doctest.testmod() 2015-06-26 08:12:22 -07:00
broadcast.py [SPARK-14418][PYSPARK] fix unpersist of Broadcast in Python 2016-04-06 10:46:34 -07:00
cloudpickle.py [SPARK-16077] [PYSPARK] catch the exception from pickle.whichmodule() 2016-06-24 14:35:34 -07:00
conf.py [SPARK-4897] [PySpark] Python 3 support 2015-04-16 16:20:57 -07:00
context.py [SPARK-16224] [SQL] [PYSPARK] SparkSession builder's configs need to be set to the existing Scala SparkContext's SparkConf 2016-06-28 07:54:44 -07:00
daemon.py [SPARK-4897] [PySpark] Python 3 support 2015-04-16 16:20:57 -07:00
files.py [SPARK-3309] [PySpark] Put all public API in __all__ 2014-09-03 11:49:45 -07:00
heapq3.py [SPARK-8652] [PYSPARK] Check return value for all uses of doctest.testmod() 2015-06-26 08:12:22 -07:00
java_gateway.py [SPARK-15364][ML][PYSPARK] Implement PySpark picklers for ml.Vector and ml.Matrix under spark.ml.python 2016-06-13 19:59:53 -07:00
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-8652] [PYSPARK] Check return value for all uses of doctest.testmod() 2015-06-26 08:12:22 -07:00
rdd.py [DOC] improve python doc for rdd.histogram and dataframe.join 2016-07-18 23:49:47 -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-10542] [PYSPARK] fix serialize namedtuple 2015-09-14 19:46:34 -07:00
shell.py [SPARK-16536][SQL][PYSPARK][MINOR] Expose sql in PySpark Shell 2016-07-13 22:24:26 -07:00
shuffle.py [SPARK-10710] Remove ability to disable spilling in core and SQL 2015-09-19 21:40:21 -07:00
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-13992][CORE][PYSPARK][FOLLOWUP] Update OFF_HEAP semantics for Java api and Python api 2016-04-12 23:06:55 -07:00
tests.py [SPARK-16224] [SQL] [PYSPARK] SparkSession builder's configs need to be set to the existing Scala SparkContext's SparkConf 2016-06-28 07:54:44 -07:00
traceback_utils.py [SPARK-1087] Move python traceback utilities into new traceback_utils.py file. 2014-09-15 19:28:17 -07:00
worker.py [SPARK-14267] [SQL] [PYSPARK] execute multiple Python UDFs within single batch 2016-03-31 16:40:20 -07:00