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|
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
"""
Unit tests for pyspark.sql; additional tests are implemented as doctests in
individual modules.
"""
import os
import sys
import pydoc
import shutil
import tempfile
import pickle
import functools
import time
import datetime
import py4j
if sys.version_info[:2] <= (2, 6):
try:
import unittest2 as unittest
except ImportError:
sys.stderr.write('Please install unittest2 to test with Python 2.6 or earlier')
sys.exit(1)
else:
import unittest
from pyspark.sql import SQLContext, HiveContext, Column, Row
from pyspark.sql.types import *
from pyspark.sql.types import UserDefinedType, _infer_type
from pyspark.tests import ReusedPySparkTestCase
from pyspark.sql.functions import UserDefinedFunction
from pyspark.sql.window import Window
class UTC(datetime.tzinfo):
"""UTC"""
ZERO = datetime.timedelta(0)
def utcoffset(self, dt):
return self.ZERO
def tzname(self, dt):
return "UTC"
def dst(self, dt):
return self.ZERO
class ExamplePointUDT(UserDefinedType):
"""
User-defined type (UDT) for ExamplePoint.
"""
@classmethod
def sqlType(self):
return ArrayType(DoubleType(), False)
@classmethod
def module(cls):
return 'pyspark.tests'
@classmethod
def scalaUDT(cls):
return 'org.apache.spark.sql.test.ExamplePointUDT'
def serialize(self, obj):
return [obj.x, obj.y]
def deserialize(self, datum):
return ExamplePoint(datum[0], datum[1])
class ExamplePoint:
"""
An example class to demonstrate UDT in Scala, Java, and Python.
"""
__UDT__ = ExamplePointUDT()
def __init__(self, x, y):
self.x = x
self.y = y
def __repr__(self):
return "ExamplePoint(%s,%s)" % (self.x, self.y)
def __str__(self):
return "(%s,%s)" % (self.x, self.y)
def __eq__(self, other):
return isinstance(other, ExamplePoint) and \
other.x == self.x and other.y == self.y
class DataTypeTests(unittest.TestCase):
# regression test for SPARK-6055
def test_data_type_eq(self):
lt = LongType()
lt2 = pickle.loads(pickle.dumps(LongType()))
self.assertEquals(lt, lt2)
# regression test for SPARK-7978
def test_decimal_type(self):
t1 = DecimalType()
t2 = DecimalType(10, 2)
self.assertTrue(t2 is not t1)
self.assertNotEqual(t1, t2)
t3 = DecimalType(8)
self.assertNotEqual(t2, t3)
class SQLTests(ReusedPySparkTestCase):
@classmethod
def setUpClass(cls):
ReusedPySparkTestCase.setUpClass()
cls.tempdir = tempfile.NamedTemporaryFile(delete=False)
os.unlink(cls.tempdir.name)
cls.sqlCtx = SQLContext(cls.sc)
cls.testData = [Row(key=i, value=str(i)) for i in range(100)]
rdd = cls.sc.parallelize(cls.testData, 2)
cls.df = rdd.toDF()
@classmethod
def tearDownClass(cls):
ReusedPySparkTestCase.tearDownClass()
shutil.rmtree(cls.tempdir.name, ignore_errors=True)
def test_range(self):
self.assertEqual(self.sqlCtx.range(1, 1).count(), 0)
self.assertEqual(self.sqlCtx.range(1, 0, -1).count(), 1)
self.assertEqual(self.sqlCtx.range(0, 1 << 40, 1 << 39).count(), 2)
self.assertEqual(self.sqlCtx.range(-2).count(), 0)
self.assertEqual(self.sqlCtx.range(3).count(), 3)
def test_explode(self):
from pyspark.sql.functions import explode
d = [Row(a=1, intlist=[1, 2, 3], mapfield={"a": "b"})]
rdd = self.sc.parallelize(d)
data = self.sqlCtx.createDataFrame(rdd)
result = data.select(explode(data.intlist).alias("a")).select("a").collect()
self.assertEqual(result[0][0], 1)
self.assertEqual(result[1][0], 2)
self.assertEqual(result[2][0], 3)
result = data.select(explode(data.mapfield).alias("a", "b")).select("a", "b").collect()
self.assertEqual(result[0][0], "a")
self.assertEqual(result[0][1], "b")
def test_and_in_expression(self):
self.assertEqual(4, self.df.filter((self.df.key <= 10) & (self.df.value <= "2")).count())
self.assertRaises(ValueError, lambda: (self.df.key <= 10) and (self.df.value <= "2"))
self.assertEqual(14, self.df.filter((self.df.key <= 3) | (self.df.value < "2")).count())
self.assertRaises(ValueError, lambda: self.df.key <= 3 or self.df.value < "2")
self.assertEqual(99, self.df.filter(~(self.df.key == 1)).count())
self.assertRaises(ValueError, lambda: not self.df.key == 1)
def test_udf_with_callable(self):
d = [Row(number=i, squared=i**2) for i in range(10)]
rdd = self.sc.parallelize(d)
data = self.sqlCtx.createDataFrame(rdd)
class PlusFour:
def __call__(self, col):
if col is not None:
return col + 4
call = PlusFour()
pudf = UserDefinedFunction(call, LongType())
res = data.select(pudf(data['number']).alias('plus_four'))
self.assertEqual(res.agg({'plus_four': 'sum'}).collect()[0][0], 85)
def test_udf_with_partial_function(self):
d = [Row(number=i, squared=i**2) for i in range(10)]
rdd = self.sc.parallelize(d)
data = self.sqlCtx.createDataFrame(rdd)
def some_func(col, param):
if col is not None:
return col + param
pfunc = functools.partial(some_func, param=4)
pudf = UserDefinedFunction(pfunc, LongType())
res = data.select(pudf(data['number']).alias('plus_four'))
self.assertEqual(res.agg({'plus_four': 'sum'}).collect()[0][0], 85)
def test_udf(self):
self.sqlCtx.registerFunction("twoArgs", lambda x, y: len(x) + y, IntegerType())
[row] = self.sqlCtx.sql("SELECT twoArgs('test', 1)").collect()
self.assertEqual(row[0], 5)
def test_udf2(self):
self.sqlCtx.registerFunction("strlen", lambda string: len(string), IntegerType())
self.sqlCtx.createDataFrame(self.sc.parallelize([Row(a="test")])).registerTempTable("test")
[res] = self.sqlCtx.sql("SELECT strlen(a) FROM test WHERE strlen(a) > 1").collect()
self.assertEqual(4, res[0])
def test_udf_with_array_type(self):
d = [Row(l=list(range(3)), d={"key": list(range(5))})]
rdd = self.sc.parallelize(d)
self.sqlCtx.createDataFrame(rdd).registerTempTable("test")
self.sqlCtx.registerFunction("copylist", lambda l: list(l), ArrayType(IntegerType()))
self.sqlCtx.registerFunction("maplen", lambda d: len(d), IntegerType())
[(l1, l2)] = self.sqlCtx.sql("select copylist(l), maplen(d) from test").collect()
self.assertEqual(list(range(3)), l1)
self.assertEqual(1, l2)
def test_broadcast_in_udf(self):
bar = {"a": "aa", "b": "bb", "c": "abc"}
foo = self.sc.broadcast(bar)
self.sqlCtx.registerFunction("MYUDF", lambda x: foo.value[x] if x else '')
[res] = self.sqlCtx.sql("SELECT MYUDF('c')").collect()
self.assertEqual("abc", res[0])
[res] = self.sqlCtx.sql("SELECT MYUDF('')").collect()
self.assertEqual("", res[0])
def test_basic_functions(self):
rdd = self.sc.parallelize(['{"foo":"bar"}', '{"foo":"baz"}'])
df = self.sqlCtx.jsonRDD(rdd)
df.count()
df.collect()
df.schema
# cache and checkpoint
self.assertFalse(df.is_cached)
df.persist()
df.unpersist()
df.cache()
self.assertTrue(df.is_cached)
self.assertEqual(2, df.count())
df.registerTempTable("temp")
df = self.sqlCtx.sql("select foo from temp")
df.count()
df.collect()
def test_apply_schema_to_row(self):
df = self.sqlCtx.jsonRDD(self.sc.parallelize(["""{"a":2}"""]))
df2 = self.sqlCtx.createDataFrame(df.map(lambda x: x), df.schema)
self.assertEqual(df.collect(), df2.collect())
rdd = self.sc.parallelize(range(10)).map(lambda x: Row(a=x))
df3 = self.sqlCtx.createDataFrame(rdd, df.schema)
self.assertEqual(10, df3.count())
def test_serialize_nested_array_and_map(self):
d = [Row(l=[Row(a=1, b='s')], d={"key": Row(c=1.0, d="2")})]
rdd = self.sc.parallelize(d)
df = self.sqlCtx.createDataFrame(rdd)
row = df.head()
self.assertEqual(1, len(row.l))
self.assertEqual(1, row.l[0].a)
self.assertEqual("2", row.d["key"].d)
l = df.map(lambda x: x.l).first()
self.assertEqual(1, len(l))
self.assertEqual('s', l[0].b)
d = df.map(lambda x: x.d).first()
self.assertEqual(1, len(d))
self.assertEqual(1.0, d["key"].c)
row = df.map(lambda x: x.d["key"]).first()
self.assertEqual(1.0, row.c)
self.assertEqual("2", row.d)
def test_infer_schema(self):
d = [Row(l=[], d={}, s=None),
Row(l=[Row(a=1, b='s')], d={"key": Row(c=1.0, d="2")}, s="")]
rdd = self.sc.parallelize(d)
df = self.sqlCtx.createDataFrame(rdd)
self.assertEqual([], df.map(lambda r: r.l).first())
self.assertEqual([None, ""], df.map(lambda r: r.s).collect())
df.registerTempTable("test")
result = self.sqlCtx.sql("SELECT l[0].a from test where d['key'].d = '2'")
self.assertEqual(1, result.head()[0])
df2 = self.sqlCtx.createDataFrame(rdd, samplingRatio=1.0)
self.assertEqual(df.schema, df2.schema)
self.assertEqual({}, df2.map(lambda r: r.d).first())
self.assertEqual([None, ""], df2.map(lambda r: r.s).collect())
df2.registerTempTable("test2")
result = self.sqlCtx.sql("SELECT l[0].a from test2 where d['key'].d = '2'")
self.assertEqual(1, result.head()[0])
def test_infer_nested_schema(self):
NestedRow = Row("f1", "f2")
nestedRdd1 = self.sc.parallelize([NestedRow([1, 2], {"row1": 1.0}),
NestedRow([2, 3], {"row2": 2.0})])
df = self.sqlCtx.inferSchema(nestedRdd1)
self.assertEqual(Row(f1=[1, 2], f2={u'row1': 1.0}), df.collect()[0])
nestedRdd2 = self.sc.parallelize([NestedRow([[1, 2], [2, 3]], [1, 2]),
NestedRow([[2, 3], [3, 4]], [2, 3])])
df = self.sqlCtx.inferSchema(nestedRdd2)
self.assertEqual(Row(f1=[[1, 2], [2, 3]], f2=[1, 2]), df.collect()[0])
from collections import namedtuple
CustomRow = namedtuple('CustomRow', 'field1 field2')
rdd = self.sc.parallelize([CustomRow(field1=1, field2="row1"),
CustomRow(field1=2, field2="row2"),
CustomRow(field1=3, field2="row3")])
df = self.sqlCtx.inferSchema(rdd)
self.assertEquals(Row(field1=1, field2=u'row1'), df.first())
def test_apply_schema(self):
from datetime import date, datetime
rdd = self.sc.parallelize([(127, -128, -32768, 32767, 2147483647, 1.0,
date(2010, 1, 1), datetime(2010, 1, 1, 1, 1, 1),
{"a": 1}, (2,), [1, 2, 3], None)])
schema = StructType([
StructField("byte1", ByteType(), False),
StructField("byte2", ByteType(), False),
StructField("short1", ShortType(), False),
StructField("short2", ShortType(), False),
StructField("int1", IntegerType(), False),
StructField("float1", FloatType(), False),
StructField("date1", DateType(), False),
StructField("time1", TimestampType(), False),
StructField("map1", MapType(StringType(), IntegerType(), False), False),
StructField("struct1", StructType([StructField("b", ShortType(), False)]), False),
StructField("list1", ArrayType(ByteType(), False), False),
StructField("null1", DoubleType(), True)])
df = self.sqlCtx.createDataFrame(rdd, schema)
results = df.map(lambda x: (x.byte1, x.byte2, x.short1, x.short2, x.int1, x.float1, x.date1,
x.time1, x.map1["a"], x.struct1.b, x.list1, x.null1))
r = (127, -128, -32768, 32767, 2147483647, 1.0, date(2010, 1, 1),
datetime(2010, 1, 1, 1, 1, 1), 1, 2, [1, 2, 3], None)
self.assertEqual(r, results.first())
df.registerTempTable("table2")
r = self.sqlCtx.sql("SELECT byte1 - 1 AS byte1, byte2 + 1 AS byte2, " +
"short1 + 1 AS short1, short2 - 1 AS short2, int1 - 1 AS int1, " +
"float1 + 1.5 as float1 FROM table2").first()
self.assertEqual((126, -127, -32767, 32766, 2147483646, 2.5), tuple(r))
from pyspark.sql.types import _parse_schema_abstract, _infer_schema_type
rdd = self.sc.parallelize([(127, -32768, 1.0, datetime(2010, 1, 1, 1, 1, 1),
{"a": 1}, (2,), [1, 2, 3])])
abstract = "byte1 short1 float1 time1 map1{} struct1(b) list1[]"
schema = _parse_schema_abstract(abstract)
typedSchema = _infer_schema_type(rdd.first(), schema)
df = self.sqlCtx.createDataFrame(rdd, typedSchema)
r = (127, -32768, 1.0, datetime(2010, 1, 1, 1, 1, 1), {"a": 1}, Row(b=2), [1, 2, 3])
self.assertEqual(r, tuple(df.first()))
def test_struct_in_map(self):
d = [Row(m={Row(i=1): Row(s="")})]
df = self.sc.parallelize(d).toDF()
k, v = list(df.head().m.items())[0]
self.assertEqual(1, k.i)
self.assertEqual("", v.s)
def test_convert_row_to_dict(self):
row = Row(l=[Row(a=1, b='s')], d={"key": Row(c=1.0, d="2")})
self.assertEqual(1, row.asDict()['l'][0].a)
df = self.sc.parallelize([row]).toDF()
df.registerTempTable("test")
row = self.sqlCtx.sql("select l, d from test").head()
self.assertEqual(1, row.asDict()["l"][0].a)
self.assertEqual(1.0, row.asDict()['d']['key'].c)
def test_infer_schema_with_udt(self):
from pyspark.sql.tests import ExamplePoint, ExamplePointUDT
row = Row(label=1.0, point=ExamplePoint(1.0, 2.0))
df = self.sc.parallelize([row]).toDF()
schema = df.schema
field = [f for f in schema.fields if f.name == "point"][0]
self.assertEqual(type(field.dataType), ExamplePointUDT)
df.registerTempTable("labeled_point")
point = self.sqlCtx.sql("SELECT point FROM labeled_point").head().point
self.assertEqual(point, ExamplePoint(1.0, 2.0))
def test_apply_schema_with_udt(self):
from pyspark.sql.tests import ExamplePoint, ExamplePointUDT
row = (1.0, ExamplePoint(1.0, 2.0))
rdd = self.sc.parallelize([row])
schema = StructType([StructField("label", DoubleType(), False),
StructField("point", ExamplePointUDT(), False)])
df = rdd.toDF(schema)
point = df.head().point
self.assertEquals(point, ExamplePoint(1.0, 2.0))
def test_parquet_with_udt(self):
from pyspark.sql.tests import ExamplePoint
row = Row(label=1.0, point=ExamplePoint(1.0, 2.0))
df0 = self.sc.parallelize([row]).toDF()
output_dir = os.path.join(self.tempdir.name, "labeled_point")
df0.saveAsParquetFile(output_dir)
df1 = self.sqlCtx.parquetFile(output_dir)
point = df1.head().point
self.assertEquals(point, ExamplePoint(1.0, 2.0))
def test_column_operators(self):
ci = self.df.key
cs = self.df.value
c = ci == cs
self.assertTrue(isinstance((- ci - 1 - 2) % 3 * 2.5 / 3.5, Column))
rcc = (1 + ci), (1 - ci), (1 * ci), (1 / ci), (1 % ci)
self.assertTrue(all(isinstance(c, Column) for c in rcc))
cb = [ci == 5, ci != 0, ci > 3, ci < 4, ci >= 0, ci <= 7]
self.assertTrue(all(isinstance(c, Column) for c in cb))
cbool = (ci & ci), (ci | ci), (~ci)
self.assertTrue(all(isinstance(c, Column) for c in cbool))
css = cs.like('a'), cs.rlike('a'), cs.asc(), cs.desc(), cs.startswith('a'), cs.endswith('a')
self.assertTrue(all(isinstance(c, Column) for c in css))
self.assertTrue(isinstance(ci.cast(LongType()), Column))
def test_column_select(self):
df = self.df
self.assertEqual(self.testData, df.select("*").collect())
self.assertEqual(self.testData, df.select(df.key, df.value).collect())
self.assertEqual([Row(value='1')], df.where(df.key == 1).select(df.value).collect())
def test_freqItems(self):
vals = [Row(a=1, b=-2.0) if i % 2 == 0 else Row(a=i, b=i * 1.0) for i in range(100)]
df = self.sc.parallelize(vals).toDF()
items = df.stat.freqItems(("a", "b"), 0.4).collect()[0]
self.assertTrue(1 in items[0])
self.assertTrue(-2.0 in items[1])
def test_aggregator(self):
df = self.df
g = df.groupBy()
self.assertEqual([99, 100], sorted(g.agg({'key': 'max', 'value': 'count'}).collect()[0]))
self.assertEqual([Row(**{"AVG(key#0)": 49.5})], g.mean().collect())
from pyspark.sql import functions
self.assertEqual((0, u'99'),
tuple(g.agg(functions.first(df.key), functions.last(df.value)).first()))
self.assertTrue(95 < g.agg(functions.approxCountDistinct(df.key)).first()[0])
self.assertEqual(100, g.agg(functions.countDistinct(df.value)).first()[0])
def test_corr(self):
import math
df = self.sc.parallelize([Row(a=i, b=math.sqrt(i)) for i in range(10)]).toDF()
corr = df.stat.corr("a", "b")
self.assertTrue(abs(corr - 0.95734012) < 1e-6)
def test_cov(self):
df = self.sc.parallelize([Row(a=i, b=2 * i) for i in range(10)]).toDF()
cov = df.stat.cov("a", "b")
self.assertTrue(abs(cov - 55.0 / 3) < 1e-6)
def test_crosstab(self):
df = self.sc.parallelize([Row(a=i % 3, b=i % 2) for i in range(1, 7)]).toDF()
ct = df.stat.crosstab("a", "b").collect()
ct = sorted(ct, key=lambda x: x[0])
for i, row in enumerate(ct):
self.assertEqual(row[0], str(i))
self.assertTrue(row[1], 1)
self.assertTrue(row[2], 1)
def test_math_functions(self):
df = self.sc.parallelize([Row(a=i, b=2 * i) for i in range(10)]).toDF()
from pyspark.sql import functions
import math
def get_values(l):
return [j[0] for j in l]
def assert_close(a, b):
c = get_values(b)
diff = [abs(v - c[k]) < 1e-6 for k, v in enumerate(a)]
return sum(diff) == len(a)
assert_close([math.cos(i) for i in range(10)],
df.select(functions.cos(df.a)).collect())
assert_close([math.cos(i) for i in range(10)],
df.select(functions.cos("a")).collect())
assert_close([math.sin(i) for i in range(10)],
df.select(functions.sin(df.a)).collect())
assert_close([math.sin(i) for i in range(10)],
df.select(functions.sin(df['a'])).collect())
assert_close([math.pow(i, 2 * i) for i in range(10)],
df.select(functions.pow(df.a, df.b)).collect())
assert_close([math.pow(i, 2) for i in range(10)],
df.select(functions.pow(df.a, 2)).collect())
assert_close([math.pow(i, 2) for i in range(10)],
df.select(functions.pow(df.a, 2.0)).collect())
assert_close([math.hypot(i, 2 * i) for i in range(10)],
df.select(functions.hypot(df.a, df.b)).collect())
def test_rand_functions(self):
df = self.df
from pyspark.sql import functions
rnd = df.select('key', functions.rand()).collect()
for row in rnd:
assert row[1] >= 0.0 and row[1] <= 1.0, "got: %s" % row[1]
rndn = df.select('key', functions.randn(5)).collect()
for row in rndn:
assert row[1] >= -4.0 and row[1] <= 4.0, "got: %s" % row[1]
def test_between_function(self):
df = self.sc.parallelize([
Row(a=1, b=2, c=3),
Row(a=2, b=1, c=3),
Row(a=4, b=1, c=4)]).toDF()
self.assertEqual([Row(a=2, b=1, c=3), Row(a=4, b=1, c=4)],
df.filter(df.a.between(df.b, df.c)).collect())
def test_save_and_load(self):
df = self.df
tmpPath = tempfile.mkdtemp()
shutil.rmtree(tmpPath)
df.write.json(tmpPath)
actual = self.sqlCtx.read.json(tmpPath)
self.assertEqual(sorted(df.collect()), sorted(actual.collect()))
schema = StructType([StructField("value", StringType(), True)])
actual = self.sqlCtx.read.json(tmpPath, schema)
self.assertEqual(sorted(df.select("value").collect()), sorted(actual.collect()))
df.write.json(tmpPath, "overwrite")
actual = self.sqlCtx.read.json(tmpPath)
self.assertEqual(sorted(df.collect()), sorted(actual.collect()))
df.write.save(format="json", mode="overwrite", path=tmpPath,
noUse="this options will not be used in save.")
actual = self.sqlCtx.read.load(format="json", path=tmpPath,
noUse="this options will not be used in load.")
self.assertEqual(sorted(df.collect()), sorted(actual.collect()))
defaultDataSourceName = self.sqlCtx.getConf("spark.sql.sources.default",
"org.apache.spark.sql.parquet")
self.sqlCtx.sql("SET spark.sql.sources.default=org.apache.spark.sql.json")
actual = self.sqlCtx.load(path=tmpPath)
self.assertEqual(sorted(df.collect()), sorted(actual.collect()))
self.sqlCtx.sql("SET spark.sql.sources.default=" + defaultDataSourceName)
shutil.rmtree(tmpPath)
def test_save_and_load_builder(self):
df = self.df
tmpPath = tempfile.mkdtemp()
shutil.rmtree(tmpPath)
df.write.json(tmpPath)
actual = self.sqlCtx.read.json(tmpPath)
self.assertEqual(sorted(df.collect()), sorted(actual.collect()))
schema = StructType([StructField("value", StringType(), True)])
actual = self.sqlCtx.read.json(tmpPath, schema)
self.assertEqual(sorted(df.select("value").collect()), sorted(actual.collect()))
df.write.mode("overwrite").json(tmpPath)
actual = self.sqlCtx.read.json(tmpPath)
self.assertEqual(sorted(df.collect()), sorted(actual.collect()))
df.write.mode("overwrite").options(noUse="this options will not be used in save.")\
.format("json").save(path=tmpPath)
actual =\
self.sqlCtx.read.format("json")\
.load(path=tmpPath, noUse="this options will not be used in load.")
self.assertEqual(sorted(df.collect()), sorted(actual.collect()))
defaultDataSourceName = self.sqlCtx.getConf("spark.sql.sources.default",
"org.apache.spark.sql.parquet")
self.sqlCtx.sql("SET spark.sql.sources.default=org.apache.spark.sql.json")
actual = self.sqlCtx.load(path=tmpPath)
self.assertEqual(sorted(df.collect()), sorted(actual.collect()))
self.sqlCtx.sql("SET spark.sql.sources.default=" + defaultDataSourceName)
shutil.rmtree(tmpPath)
def test_help_command(self):
# Regression test for SPARK-5464
rdd = self.sc.parallelize(['{"foo":"bar"}', '{"foo":"baz"}'])
df = self.sqlCtx.jsonRDD(rdd)
# render_doc() reproduces the help() exception without printing output
pydoc.render_doc(df)
pydoc.render_doc(df.foo)
pydoc.render_doc(df.take(1))
def test_access_column(self):
df = self.df
self.assertTrue(isinstance(df.key, Column))
self.assertTrue(isinstance(df['key'], Column))
self.assertTrue(isinstance(df[0], Column))
self.assertRaises(IndexError, lambda: df[2])
self.assertRaises(IndexError, lambda: df["bad_key"])
self.assertRaises(TypeError, lambda: df[{}])
def test_access_nested_types(self):
df = self.sc.parallelize([Row(l=[1], r=Row(a=1, b="b"), d={"k": "v"})]).toDF()
self.assertEqual(1, df.select(df.l[0]).first()[0])
self.assertEqual(1, df.select(df.l.getItem(0)).first()[0])
self.assertEqual(1, df.select(df.r.a).first()[0])
self.assertEqual("b", df.select(df.r.getField("b")).first()[0])
self.assertEqual("v", df.select(df.d["k"]).first()[0])
self.assertEqual("v", df.select(df.d.getItem("k")).first()[0])
def test_field_accessor(self):
df = self.sc.parallelize([Row(l=[1], r=Row(a=1, b="b"), d={"k": "v"})]).toDF()
self.assertEqual(1, df.select(df.l[0]).first()[0])
self.assertEqual(1, df.select(df.r["a"]).first()[0])
self.assertEqual("b", df.select(df.r["b"]).first()[0])
self.assertEqual("v", df.select(df.d["k"]).first()[0])
def test_infer_long_type(self):
longrow = [Row(f1='a', f2=100000000000000)]
df = self.sc.parallelize(longrow).toDF()
self.assertEqual(df.schema.fields[1].dataType, LongType())
# this saving as Parquet caused issues as well.
output_dir = os.path.join(self.tempdir.name, "infer_long_type")
df.saveAsParquetFile(output_dir)
df1 = self.sqlCtx.parquetFile(output_dir)
self.assertEquals('a', df1.first().f1)
self.assertEquals(100000000000000, df1.first().f2)
self.assertEqual(_infer_type(1), LongType())
self.assertEqual(_infer_type(2**10), LongType())
self.assertEqual(_infer_type(2**20), LongType())
self.assertEqual(_infer_type(2**31 - 1), LongType())
self.assertEqual(_infer_type(2**31), LongType())
self.assertEqual(_infer_type(2**61), LongType())
self.assertEqual(_infer_type(2**71), LongType())
def test_filter_with_datetime(self):
time = datetime.datetime(2015, 4, 17, 23, 1, 2, 3000)
date = time.date()
row = Row(date=date, time=time)
df = self.sqlCtx.createDataFrame([row])
self.assertEqual(1, df.filter(df.date == date).count())
self.assertEqual(1, df.filter(df.time == time).count())
self.assertEqual(0, df.filter(df.date > date).count())
self.assertEqual(0, df.filter(df.time > time).count())
def test_time_with_timezone(self):
day = datetime.date.today()
now = datetime.datetime.now()
ts = time.mktime(now.timetuple()) + now.microsecond / 1e6
# class in __main__ is not serializable
from pyspark.sql.tests import UTC
utc = UTC()
utcnow = datetime.datetime.fromtimestamp(ts, utc)
df = self.sqlCtx.createDataFrame([(day, now, utcnow)])
day1, now1, utcnow1 = df.first()
# Pyrolite serialize java.sql.Date as datetime, will be fixed in new version
self.assertEqual(day1.date(), day)
# Pyrolite does not support microsecond, the error should be
# less than 1 millisecond
self.assertTrue(now - now1 < datetime.timedelta(0.001))
self.assertTrue(now - utcnow1 < datetime.timedelta(0.001))
def test_dropna(self):
schema = StructType([
StructField("name", StringType(), True),
StructField("age", IntegerType(), True),
StructField("height", DoubleType(), True)])
# shouldn't drop a non-null row
self.assertEqual(self.sqlCtx.createDataFrame(
[(u'Alice', 50, 80.1)], schema).dropna().count(),
1)
# dropping rows with a single null value
self.assertEqual(self.sqlCtx.createDataFrame(
[(u'Alice', None, 80.1)], schema).dropna().count(),
0)
self.assertEqual(self.sqlCtx.createDataFrame(
[(u'Alice', None, 80.1)], schema).dropna(how='any').count(),
0)
# if how = 'all', only drop rows if all values are null
self.assertEqual(self.sqlCtx.createDataFrame(
[(u'Alice', None, 80.1)], schema).dropna(how='all').count(),
1)
self.assertEqual(self.sqlCtx.createDataFrame(
[(None, None, None)], schema).dropna(how='all').count(),
0)
# how and subset
self.assertEqual(self.sqlCtx.createDataFrame(
[(u'Alice', 50, None)], schema).dropna(how='any', subset=['name', 'age']).count(),
1)
self.assertEqual(self.sqlCtx.createDataFrame(
[(u'Alice', None, None)], schema).dropna(how='any', subset=['name', 'age']).count(),
0)
# threshold
self.assertEqual(self.sqlCtx.createDataFrame(
[(u'Alice', None, 80.1)], schema).dropna(thresh=2).count(),
1)
self.assertEqual(self.sqlCtx.createDataFrame(
[(u'Alice', None, None)], schema).dropna(thresh=2).count(),
0)
# threshold and subset
self.assertEqual(self.sqlCtx.createDataFrame(
[(u'Alice', 50, None)], schema).dropna(thresh=2, subset=['name', 'age']).count(),
1)
self.assertEqual(self.sqlCtx.createDataFrame(
[(u'Alice', None, 180.9)], schema).dropna(thresh=2, subset=['name', 'age']).count(),
0)
# thresh should take precedence over how
self.assertEqual(self.sqlCtx.createDataFrame(
[(u'Alice', 50, None)], schema).dropna(
how='any', thresh=2, subset=['name', 'age']).count(),
1)
def test_fillna(self):
schema = StructType([
StructField("name", StringType(), True),
StructField("age", IntegerType(), True),
StructField("height", DoubleType(), True)])
# fillna shouldn't change non-null values
row = self.sqlCtx.createDataFrame([(u'Alice', 10, 80.1)], schema).fillna(50).first()
self.assertEqual(row.age, 10)
# fillna with int
row = self.sqlCtx.createDataFrame([(u'Alice', None, None)], schema).fillna(50).first()
self.assertEqual(row.age, 50)
self.assertEqual(row.height, 50.0)
# fillna with double
row = self.sqlCtx.createDataFrame([(u'Alice', None, None)], schema).fillna(50.1).first()
self.assertEqual(row.age, 50)
self.assertEqual(row.height, 50.1)
# fillna with string
row = self.sqlCtx.createDataFrame([(None, None, None)], schema).fillna("hello").first()
self.assertEqual(row.name, u"hello")
self.assertEqual(row.age, None)
# fillna with subset specified for numeric cols
row = self.sqlCtx.createDataFrame(
[(None, None, None)], schema).fillna(50, subset=['name', 'age']).first()
self.assertEqual(row.name, None)
self.assertEqual(row.age, 50)
self.assertEqual(row.height, None)
# fillna with subset specified for numeric cols
row = self.sqlCtx.createDataFrame(
[(None, None, None)], schema).fillna("haha", subset=['name', 'age']).first()
self.assertEqual(row.name, "haha")
self.assertEqual(row.age, None)
self.assertEqual(row.height, None)
def test_bitwise_operations(self):
from pyspark.sql import functions
row = Row(a=170, b=75)
df = self.sqlCtx.createDataFrame([row])
result = df.select(df.a.bitwiseAND(df.b)).collect()[0].asDict()
self.assertEqual(170 & 75, result['(a & b)'])
result = df.select(df.a.bitwiseOR(df.b)).collect()[0].asDict()
self.assertEqual(170 | 75, result['(a | b)'])
result = df.select(df.a.bitwiseXOR(df.b)).collect()[0].asDict()
self.assertEqual(170 ^ 75, result['(a ^ b)'])
result = df.select(functions.bitwiseNOT(df.b)).collect()[0].asDict()
self.assertEqual(~75, result['~b'])
def test_replace(self):
schema = StructType([
StructField("name", StringType(), True),
StructField("age", IntegerType(), True),
StructField("height", DoubleType(), True)])
# replace with int
row = self.sqlCtx.createDataFrame([(u'Alice', 10, 10.0)], schema).replace(10, 20).first()
self.assertEqual(row.age, 20)
self.assertEqual(row.height, 20.0)
# replace with double
row = self.sqlCtx.createDataFrame(
[(u'Alice', 80, 80.0)], schema).replace(80.0, 82.1).first()
self.assertEqual(row.age, 82)
self.assertEqual(row.height, 82.1)
# replace with string
row = self.sqlCtx.createDataFrame(
[(u'Alice', 10, 80.1)], schema).replace(u'Alice', u'Ann').first()
self.assertEqual(row.name, u"Ann")
self.assertEqual(row.age, 10)
# replace with subset specified by a string of a column name w/ actual change
row = self.sqlCtx.createDataFrame(
[(u'Alice', 10, 80.1)], schema).replace(10, 20, subset='age').first()
self.assertEqual(row.age, 20)
# replace with subset specified by a string of a column name w/o actual change
row = self.sqlCtx.createDataFrame(
[(u'Alice', 10, 80.1)], schema).replace(10, 20, subset='height').first()
self.assertEqual(row.age, 10)
# replace with subset specified with one column replaced, another column not in subset
# stays unchanged.
row = self.sqlCtx.createDataFrame(
[(u'Alice', 10, 10.0)], schema).replace(10, 20, subset=['name', 'age']).first()
self.assertEqual(row.name, u'Alice')
self.assertEqual(row.age, 20)
self.assertEqual(row.height, 10.0)
# replace with subset specified but no column will be replaced
row = self.sqlCtx.createDataFrame(
[(u'Alice', 10, None)], schema).replace(10, 20, subset=['name', 'height']).first()
self.assertEqual(row.name, u'Alice')
self.assertEqual(row.age, 10)
self.assertEqual(row.height, None)
class HiveContextSQLTests(ReusedPySparkTestCase):
@classmethod
def setUpClass(cls):
ReusedPySparkTestCase.setUpClass()
cls.tempdir = tempfile.NamedTemporaryFile(delete=False)
try:
cls.sc._jvm.org.apache.hadoop.hive.conf.HiveConf()
except py4j.protocol.Py4JError:
cls.tearDownClass()
raise unittest.SkipTest("Hive is not available")
except TypeError:
cls.tearDownClass()
raise unittest.SkipTest("Hive is not available")
os.unlink(cls.tempdir.name)
_scala_HiveContext =\
cls.sc._jvm.org.apache.spark.sql.hive.test.TestHiveContext(cls.sc._jsc.sc())
cls.sqlCtx = HiveContext(cls.sc, _scala_HiveContext)
cls.testData = [Row(key=i, value=str(i)) for i in range(100)]
cls.df = cls.sc.parallelize(cls.testData).toDF()
@classmethod
def tearDownClass(cls):
ReusedPySparkTestCase.tearDownClass()
shutil.rmtree(cls.tempdir.name, ignore_errors=True)
def test_save_and_load_table(self):
df = self.df
tmpPath = tempfile.mkdtemp()
shutil.rmtree(tmpPath)
df.write.saveAsTable("savedJsonTable", "json", "append", path=tmpPath)
actual = self.sqlCtx.createExternalTable("externalJsonTable", tmpPath, "json")
self.assertEqual(sorted(df.collect()),
sorted(self.sqlCtx.sql("SELECT * FROM savedJsonTable").collect()))
self.assertEqual(sorted(df.collect()),
sorted(self.sqlCtx.sql("SELECT * FROM externalJsonTable").collect()))
self.assertEqual(sorted(df.collect()), sorted(actual.collect()))
self.sqlCtx.sql("DROP TABLE externalJsonTable")
df.write.saveAsTable("savedJsonTable", "json", "overwrite", path=tmpPath)
schema = StructType([StructField("value", StringType(), True)])
actual = self.sqlCtx.createExternalTable("externalJsonTable", source="json",
schema=schema, path=tmpPath,
noUse="this options will not be used")
self.assertEqual(sorted(df.collect()),
sorted(self.sqlCtx.sql("SELECT * FROM savedJsonTable").collect()))
self.assertEqual(sorted(df.select("value").collect()),
sorted(self.sqlCtx.sql("SELECT * FROM externalJsonTable").collect()))
self.assertEqual(sorted(df.select("value").collect()), sorted(actual.collect()))
self.sqlCtx.sql("DROP TABLE savedJsonTable")
self.sqlCtx.sql("DROP TABLE externalJsonTable")
defaultDataSourceName = self.sqlCtx.getConf("spark.sql.sources.default",
"org.apache.spark.sql.parquet")
self.sqlCtx.sql("SET spark.sql.sources.default=org.apache.spark.sql.json")
df.write.saveAsTable("savedJsonTable", path=tmpPath, mode="overwrite")
actual = self.sqlCtx.createExternalTable("externalJsonTable", path=tmpPath)
self.assertEqual(sorted(df.collect()),
sorted(self.sqlCtx.sql("SELECT * FROM savedJsonTable").collect()))
self.assertEqual(sorted(df.collect()),
sorted(self.sqlCtx.sql("SELECT * FROM externalJsonTable").collect()))
self.assertEqual(sorted(df.collect()), sorted(actual.collect()))
self.sqlCtx.sql("DROP TABLE savedJsonTable")
self.sqlCtx.sql("DROP TABLE externalJsonTable")
self.sqlCtx.sql("SET spark.sql.sources.default=" + defaultDataSourceName)
shutil.rmtree(tmpPath)
def test_window_functions(self):
df = self.sqlCtx.createDataFrame([(1, "1"), (2, "2"), (1, "2"), (1, "2")], ["key", "value"])
w = Window.partitionBy("value").orderBy("key")
from pyspark.sql import functions as F
sel = df.select(df.value, df.key,
F.max("key").over(w.rowsBetween(0, 1)),
F.min("key").over(w.rowsBetween(0, 1)),
F.count("key").over(w.rowsBetween(float('-inf'), float('inf'))),
F.rowNumber().over(w),
F.rank().over(w),
F.denseRank().over(w),
F.ntile(2).over(w))
rs = sorted(sel.collect())
expected = [
("1", 1, 1, 1, 1, 1, 1, 1, 1),
("2", 1, 1, 1, 3, 1, 1, 1, 1),
("2", 1, 2, 1, 3, 2, 1, 1, 1),
("2", 2, 2, 2, 3, 3, 3, 2, 2)
]
for r, ex in zip(rs, expected):
self.assertEqual(tuple(r), ex[:len(r)])
if __name__ == "__main__":
unittest.main()
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