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[SPARK-7248] implemented random number generators for DataFrames #5819

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brkyvz wants to merge 8 commits into from
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[SPARK-7248] implemented random number generators for DataFrames #5819

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6d43895
implemented random generators
brkyvz Apr 30, 2015
c5909eb
deleted old implementation of Rand
brkyvz Apr 30, 2015
03637f0
fix broken hive func
brkyvz Apr 30, 2015
b453716
move radn with seed down
brkyvz Apr 30, 2015
7d53953
waiting for hive tests
brkyvz Apr 30, 2015
13cad5c
couple fixes
brkyvz Apr 30, 2015
4234c3a
fix Rand expression
brkyvz Apr 30, 2015
50d69d4
add seed for test that failed
brkyvz May 1, 2015
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couple fixes
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@brkyvz
brkyvz committed Apr 30, 2015
commit 13cad5ccd48e06abfdb68e1a4cec18b944a2be9f
2 changes: 1 addition & 1 deletion python/pyspark/sql/tests.py
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Expand Up @@ -422,7 +422,7 @@ def test_rand_functions(self):
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(5L)).collect()
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]

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2 changes: 1 addition & 1 deletion sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
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Expand Up @@ -1243,7 +1243,7 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
case Token("TOK_FUNCTION", Token(ARRAY(), Nil) :: children) =>
CreateArray(children.map(nodeToExpr))
case Token("TOK_FUNCTION", Token(RAND(), Nil) :: Nil) => Rand()
case Token("TOK_FUNCTION", Token(RAND(seed), Nil) :: Nil) => Rand(seed.toLong)
case Token("TOK_FUNCTION", Token(RAND(), Nil) :: seed :: Nil) => Rand(seed.toString.toLong)
case Token("TOK_FUNCTION", Token(SUBSTR(), Nil) :: string :: pos :: Nil) =>
Substring(nodeToExpr(string), nodeToExpr(pos), Literal.create(Integer.MAX_VALUE, IntegerType))
case Token("TOK_FUNCTION", Token(SUBSTR(), Nil) :: string :: pos :: length :: Nil) =>
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