jorisvandenbossche commented on a change in pull request #10991:
URL: https://github.com/apache/arrow/pull/10991#discussion_r717380721
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File path: python/pyarrow/tests/test_dataset.py
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@@ -2633,6 +2638,67 @@ def test_ipc_format(tempdir, dataset_reader):
assert result.equals(table)
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+def test_orc_format(tempdir, dataset_reader):
+ from pyarrow import orc
+ table = pa.table({'a': pa.array([1, 2, 3], type="int8"),
+ 'b': pa.array([.1, .2, .3], type="float64")})
+
+ path = str(tempdir / 'test.orc')
+ orc.write_table(table, path)
+
+ dataset = ds.dataset(path, format=ds.OrcFileFormat())
+ result = dataset_reader.to_table(dataset)
+ result.validate(full=True)
+ assert result.equals(table)
+
+ dataset = ds.dataset(path, format="orc")
+ result = dataset_reader.to_table(dataset)
+ result.validate(full=True)
+ assert result.equals(table)
+
+ result = dataset_reader.to_table(dataset, columns=["b"])
+ result.validate(full=True)
+ assert result.equals(table.select(["b"]))
+
+ assert dataset_reader.count_rows(dataset) == 3
+ assert dataset_reader.count_rows(dataset, filter=ds.field("a") > 2) == 1
+
+
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+def test_orc_scan_options(tempdir, dataset_reader):
+ from pyarrow import orc
+ table = pa.table({'a': pa.array([1, 2, 3], type="int8"),
+ 'b': pa.array([.1, .2, .3], type="float64")})
+
+ path = str(tempdir / 'test.orc')
+ orc.write_table(table, path)
+
+ dataset = ds.dataset(path, format="orc")
+ result = list(dataset_reader.to_batches(dataset))
+ assert len(result) == 1
+ assert result[0].num_rows == 3
+ assert result[0].equals(table.to_batches()[0])
+ # TODO batch_size is not yet supported
Review comment:
Ah, not yet for this follow-up. Created
https://issues.apache.org/jira/browse/ARROW-14153 and added that in the TODO
comment
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