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[SPARK-30113][SQL][Python] Expose mergeSchema option in PySpark's ORC APIs #26755

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[SPARK-30113][SQL][Python] Expose mergeSchema option in PySpark's ORC APIs #26755

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9 changes: 6 additions & 3 deletions python/pyspark/sql/readwriter.py
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Original file line number Diff line number Diff line change
Expand Up @@ -520,17 +520,20 @@ def func(iterator):
raise TypeError("path can be only string, list or RDD")

@since(1.5)
def orc(self, path, recursiveFileLookup=None):
def orc(self, path, mergeSchema=None, recursiveFileLookup=None):
"""Loads ORC files, returning the result as a :class:`DataFrame`.

:param mergeSchema: sets whether we should merge schemas collected from all
ORC part-files. This will override ``spark.sql.orc.mergeSchema``.
The default value is specified in ``spark.sql.orc.mergeSchema``.
:param recursiveFileLookup: recursively scan a directory for files. Using this option
disables `partition discovery`_.
disables `partition discovery`_.

>>> df = spark.read.orc('python/test_support/sql/orc_partitioned')
>>> df.dtypes
[('a', 'bigint'), ('b', 'int'), ('c', 'int')]
"""
self._set_opts(recursiveFileLookup=recursiveFileLookup)
self._set_opts(mergeSchema=mergeSchema, recursiveFileLookup=recursiveFileLookup)
if isinstance(path, basestring):
path = [path]
return self._df(self._jreader.orc(_to_seq(self._spark._sc, path)))
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9 changes: 6 additions & 3 deletions python/pyspark/sql/streaming.py
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Original file line number Diff line number Diff line change
Expand Up @@ -514,21 +514,24 @@ def json(self, path, schema=None, primitivesAsString=None, prefersDecimal=None,
raise TypeError("path can be only a single string")

@since(2.3)
def orc(self, path, recursiveFileLookup=None):
def orc(self, path, mergeSchema=None, recursiveFileLookup=None):
"""Loads a ORC file stream, returning the result as a :class:`DataFrame`.

.. note:: Evolving.

:param mergeSchema: sets whether we should merge schemas collected from all
ORC part-files. This will override ``spark.sql.orc.mergeSchema``.
The default value is specified in ``spark.sql.orc.mergeSchema``.
:param recursiveFileLookup: recursively scan a directory for files. Using this option
disables `partition discovery`_.
disables `partition discovery`_.

>>> orc_sdf = spark.readStream.schema(sdf_schema).orc(tempfile.mkdtemp())
>>> orc_sdf.isStreaming
True
>>> orc_sdf.schema == sdf_schema
True
"""
self._set_opts(recursiveFileLookup=recursiveFileLookup)
self._set_opts(mergeSchema=mergeSchema, recursiveFileLookup=recursiveFileLookup)
if isinstance(path, basestring):
return self._df(self._jreader.orc(path))
else:
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