I think the problem may be that callUDF takes a DataType indicating the
return type of the UDF as its second argument.
On Oct 12, 2015 9:27 AM, "Umesh Kacha" <umesh.ka...@gmail.com> wrote:
> Hi if you can help it would be great as I am stuck don't know how to
> remove compilation error in callUdf when we pass three parameters function
> name string column name as col and lit function please guide
> On Oct 11, 2015 1:05 AM, "Umesh Kacha" <umesh.ka...@gmail.com> wrote:
>
>> Hi any idea? how do I call percentlie_approx using callUdf() please guide.
>>
>> On Sat, Oct 10, 2015 at 1:39 AM, Umesh Kacha <umesh.ka...@gmail.com>
>> wrote:
>>
>>> I have a doubt Michael I tried to use callUDF in the following code it
>>> does not work.
>>>
>>> sourceFrame.agg(callUdf("percentile_approx",col("myCol"),lit(0.25)))
>>>
>>> Above code does not compile because callUdf() takes only two arguments
>>> function name in String and Column class type. Please guide.
>>>
>>> On Sat, Oct 10, 2015 at 1:29 AM, Umesh Kacha <umesh.ka...@gmail.com>
>>> wrote:
>>>
>>>> thanks much Michael let me try.
>>>>
>>>> On Sat, Oct 10, 2015 at 1:20 AM, Michael Armbrust <
>>>> mich...@databricks.com> wrote:
>>>>
>>>>> This is confusing because I made a typo...
>>>>>
>>>>> callUDF("percentile_approx", col("mycol"), lit(0.25))
>>>>>
>>>>> The first argument is the name of the UDF, all other arguments need to
>>>>> be columns that are passed in as arguments. lit is just saying to make a
>>>>> literal column that always has the value 0.25.
>>>>>
>>>>> On Fri, Oct 9, 2015 at 12:16 PM, <saif.a.ell...@wellsfargo.com> wrote:
>>>>>
>>>>>> Yes but I mean, this is rather curious. How is def lit(literal:Any)
>>>>>> --> becomes a percentile function lit(25)
>>>>>>
>>>>>>
>>>>>>
>>>>>> Thanks for clarification
>>>>>>
>>>>>> Saif
>>>>>>
>>>>>>
>>>>>>
>>>>>> *From:* Umesh Kacha [mailto:umesh.ka...@gmail.com]
>>>>>> *Sent:* Friday, October 09, 2015 4:10 PM
>>>>>> *To:* Ellafi, Saif A.
>>>>>> *Cc:* Michael Armbrust; user
>>>>>>
>>>>>> *Subject:* Re: How to calculate percentile of a column of DataFrame?
>>>>>>
>>>>>>
>>>>>>
>>>>>> I found it in 1.3 documentation lit says something else not percent
>>>>>>
>>>>>>
>>>>>>
>>>>>> public static Column
>>>>>> <https://spark.apache.org/docs/1.3.1/api/java/org/apache/spark/sql/Column.html>
>>>>>> lit(Object literal)
>>>>>>
>>>>>> Creates a Column
>>>>>> <https://spark.apache.org/docs/1.3.1/api/java/org/apache/spark/sql/Column.html>
>>>>>> of
>>>>>> literal value.
>>>>>>
>>>>>> The passed in object is returned directly if it is already a Column
>>>>>> <https://spark.apache.org/docs/1.3.1/api/java/org/apache/spark/sql/Column.html>.
>>>>>> If the object is a Scala Symbol, it is converted into a Column
>>>>>> <https://spark.apache.org/docs/1.3.1/api/java/org/apache/spark/sql/Column.html>
>>>>>> also.
>>>>>> Otherwise, a new Column
>>>>>> <https://spark.apache.org/docs/1.3.1/api/java/org/apache/spark/sql/Column.html>
>>>>>> is
>>>>>> created to represent the literal value.
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Sat, Oct 10, 2015 at 12:39 AM, <saif.a.ell...@wellsfargo.com>
>>>>>> wrote:
>>>>>>
>>>>>> Where can we find other available functions such as lit() ? I can’t
>>>>>> find lit in the api.
>>>>>>
>>>>>>
>>>>>>
>>>>>> Thanks
>>>>>>
>>>>>>
>>>>>>
>>>>>> *From:* Michael Armbrust [mailto:mich...@databricks.com]
>>>>>> *Sent:* Friday, October 09, 2015 4:04 PM
>>>>>> *To:* unk1102
>>>>>> *Cc:* user
>>>>>> *Subject:* Re: How to calculate percentile of a column of DataFrame?
>>>>>>
>>>>>>
>>>>>>
>>>>>> You can use callUDF(col("mycol"), lit(0.25)) to call hive UDFs from
>>>>>> dataframes.
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Fri, Oct 9, 2015 at 12:01 PM, unk1102 <umesh.ka...@gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>> Hi how to calculate percentile of a column in a DataFrame? I cant
>>>>>> find any
>>>>>> percentile_approx function in Spark aggregation functions. For e.g.
>>>>>> in Hive
>>>>>> we have percentile_approx and we can use it in the following way
>>>>>>
>>>>>> hiveContext.sql("select percentile_approx("mycol",0.25) from myTable);
>>>>>>
>>>>>> I can see ntile function but not sure how it is gonna give results
>>>>>> same as
>>>>>> above query please guide.
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> View this message in context:
>>>>>> http://apache-spark-user-list.1001560.n3.nabble.com/How-to-calculate-percentile-of-a-column-of-DataFrame-tp25000.html
>>>>>> Sent from the Apache Spark User List mailing list archive at
>>>>>> Nabble.com.
>>>>>>
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>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>
>>>
>>
