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author | Jeff Zhang <zjffdu@apache.org> | 2017-03-09 11:44:34 -0800 |
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committer | Holden Karau <holden@us.ibm.com> | 2017-03-09 11:44:34 -0800 |
commit | cabe1df8606e7e5b9e6efb106045deb3f39f5f13 (patch) | |
tree | f46f3bd4a2d85abe2b1b12632dfd7b27f0da226e /python | |
parent | 30b18e69361746b4d656474374d8b486bb48a19e (diff) | |
download | spark-cabe1df8606e7e5b9e6efb106045deb3f39f5f13.tar.gz spark-cabe1df8606e7e5b9e6efb106045deb3f39f5f13.tar.bz2 spark-cabe1df8606e7e5b9e6efb106045deb3f39f5f13.zip |
[SPARK-12334][SQL][PYSPARK] Support read from multiple input paths for orc file in DataFrameReader.orc
Beside the issue in spark api, also fix 2 minor issues in pyspark
- support read from multiple input paths for orc
- support read from multiple input paths for text
Author: Jeff Zhang <zjffdu@apache.org>
Closes #10307 from zjffdu/SPARK-12334.
Diffstat (limited to 'python')
-rw-r--r-- | python/pyspark/sql/readwriter.py | 14 | ||||
-rw-r--r-- | python/pyspark/sql/tests.py | 5 |
2 files changed, 13 insertions, 6 deletions
diff --git a/python/pyspark/sql/readwriter.py b/python/pyspark/sql/readwriter.py index 45fb9b7591..4354345ebc 100644 --- a/python/pyspark/sql/readwriter.py +++ b/python/pyspark/sql/readwriter.py @@ -161,7 +161,7 @@ class DataFrameReader(OptionUtils): mode=None, columnNameOfCorruptRecord=None, dateFormat=None, timestampFormat=None, timeZone=None, wholeFile=None): """ - Loads a JSON file and returns the results as a :class:`DataFrame`. + Loads JSON files and returns the results as a :class:`DataFrame`. `JSON Lines <http://jsonlines.org/>`_(newline-delimited JSON) is supported by default. For JSON (one record per file), set the `wholeFile` parameter to ``true``. @@ -169,7 +169,7 @@ class DataFrameReader(OptionUtils): If the ``schema`` parameter is not specified, this function goes through the input once to determine the input schema. - :param path: string represents path to the JSON dataset, + :param path: string represents path to the JSON dataset, or a list of paths, or RDD of Strings storing JSON objects. :param schema: an optional :class:`pyspark.sql.types.StructType` for the input schema. :param primitivesAsString: infers all primitive values as a string type. If None is set, @@ -252,7 +252,7 @@ class DataFrameReader(OptionUtils): jrdd = keyed._jrdd.map(self._spark._jvm.BytesToString()) return self._df(self._jreader.json(jrdd)) else: - raise TypeError("path can be only string or RDD") + raise TypeError("path can be only string, list or RDD") @since(1.4) def table(self, tableName): @@ -269,7 +269,7 @@ class DataFrameReader(OptionUtils): @since(1.4) def parquet(self, *paths): - """Loads a Parquet file, returning the result as a :class:`DataFrame`. + """Loads Parquet files, returning the result as a :class:`DataFrame`. You can set the following Parquet-specific option(s) for reading Parquet files: * ``mergeSchema``: sets whether we should merge schemas collected from all \ @@ -407,7 +407,7 @@ class DataFrameReader(OptionUtils): @since(1.5) def orc(self, path): - """Loads an ORC file, returning the result as a :class:`DataFrame`. + """Loads ORC files, returning the result as a :class:`DataFrame`. .. note:: Currently ORC support is only available together with Hive support. @@ -415,7 +415,9 @@ class DataFrameReader(OptionUtils): >>> df.dtypes [('a', 'bigint'), ('b', 'int'), ('c', 'int')] """ - return self._df(self._jreader.orc(path)) + if isinstance(path, basestring): + path = [path] + return self._df(self._jreader.orc(_to_seq(self._spark._sc, path))) @since(1.4) def jdbc(self, url, table, column=None, lowerBound=None, upperBound=None, numPartitions=None, diff --git a/python/pyspark/sql/tests.py b/python/pyspark/sql/tests.py index 1b873e9578..f0a9a0400e 100644 --- a/python/pyspark/sql/tests.py +++ b/python/pyspark/sql/tests.py @@ -450,6 +450,11 @@ class SQLTests(ReusedPySparkTestCase): Row(_c0=u'Hyukjin', _c1=u'25', _c2=u'I am Hyukjin\n\nI love Spark!')] self.assertEqual(ages_newlines.collect(), expected) + def test_read_multiple_orc_file(self): + df = self.spark.read.orc(["python/test_support/sql/orc_partitioned/b=0/c=0", + "python/test_support/sql/orc_partitioned/b=1/c=1"]) + self.assertEqual(2, df.count()) + def test_udf_with_input_file_name(self): from pyspark.sql.functions import udf, input_file_name from pyspark.sql.types import StringType |