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From Oliver Krohne <>
Subject RE: custom UDF throws "No matching method for class"
Date Sun, 23 Dec 2012 15:51:47 GMT

actually I tried that but this lead also to an error:
 Error in semantic analysis: No matching method for class org.apache.hadoop.hive.ql.udf.UDFToDouble
with (struct<value:double>). Possible choices: _FUNC_(void)  _FUNC_(boolean)  _FUNC_(tinyint)
 _FUNC_(smallint)  _FUNC_(int)  _FUNC_(bigint)  _FUNC_(float)  _FUNC_(string)  _FUNC_(timestamp)
I don't need null support. Can you explain the issue?

Date: Sun, 23 Dec 2012 10:44:26 -0500
Subject: Re: custom UDF throws "No matching method for class"

Unless you need specific support or null you could just change the UDF to accept the primitive

On Sun, Dec 23, 2012 at 10:34 AM, Oliver Krohne <> wrote:

I've written a UDF to convert currency values which are stored in an external table as double
together with the currency type as string.
The currency udf extends UDF and has one method to convert the value:

public DoubleWritable evaluate(DoubleWritable value, Text baseCurrency, Text targetCurrency)
In the select statement I call the function. value and currency are defined with the right
types in the external table:
and it throws the following error:Wrong arguments ''EUR'': No matching method for class
with (double, string, string). Possible choices: _FUNC_(,
string, string) 

That is with Hive version
Has anybody a hint what is going wrong?

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