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Date: Wed, 26 Feb 2014 15:06:42 -0800
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 <CACWHCDKj5OzK-S+XSDr4EZhv4s66izU+fX3PJx2a-F5y18Mqug@mail.gmail.com>
Subject: Re: Best class for currency
From: Manoj Khangaonkar <khangaonkar@gmail.com>
To: user@hadoop.apache.org
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In Java, for precision , you need to use BigDecimal.

I believe there must be a BigDecimalWritable in hadoop.

regards


On Wed, Feb 26, 2014 at 2:58 PM, Marco Shaw <marco.shaw@gmail.com> wrote:

> (If code is required, I can send it along later.)
>
> I'm a beginner and I'm having issues with MR when trying to read values of
> the form 99.99.
>
> I'm reading up as much as I can. I wanted to try to use Java's types to
> determine whether to use a DoubleWritable or FloatWritable, but after some
> research, Java seems to recommend against using either of these for
> representing currency.
>
> I'm using the FileInputFormat class which I understand defaults to a
> LongWritable,Text <K,V> pair.
>
> What Hadoop data type should I use with my Driver section/Job class to
> work with currency?
>
> I've tried FloatWritable and DoubleWritable and my output always ends up
> as String,Number.0 in the output file ("something[tab]55.0", for example,
> when I know 55.0 is wrong).
>
> Marco


-- 
http://khangaonkar.blogspot.com/

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<div dir=3D"ltr"><div><div>In Java, for precision , you need to use BigDeci=
mal.<br><br></div>I believe there must be a BigDecimalWritable in hadoop.<b=
r><br></div>regards<br></div><div class=3D"gmail_extra"><br><br><div class=
=3D"gmail_quote">
On Wed, Feb 26, 2014 at 2:58 PM, Marco Shaw <span dir=3D"ltr">&lt;<a href=
=3D"mailto:marco.shaw@gmail.com" target=3D"_blank">marco.shaw@gmail.com</a>=
&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0=
 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
(If code is required, I can send it along later.)<br>
<br>
I&#39;m a beginner and I&#39;m having issues with MR when trying to read va=
lues of the form 99.99.<br>
<br>
I&#39;m reading up as much as I can. I wanted to try to use Java&#39;s type=
s to determine whether to use a DoubleWritable or FloatWritable, but after =
some research, Java seems to recommend against using either of these for re=
presenting currency.<br>

<br>
I&#39;m using the FileInputFormat class which I understand defaults to a Lo=
ngWritable,Text &lt;K,V&gt; pair.<br>
<br>
What Hadoop data type should I use with my Driver section/Job class to work=
 with currency?<br>
<br>
I&#39;ve tried FloatWritable and DoubleWritable and my output always ends u=
p as String,Number.0 in the output file (&quot;something[tab]55.0&quot;, fo=
r example, when I know 55.0 is wrong).<br>
<span class=3D"HOEnZb"><font color=3D"#888888"><br>
Marco</font></span></blockquote></div><br><br clear=3D"all"><br>-- <br><a h=
ref=3D"http://khangaonkar.blogspot.com/">http://khangaonkar.blogspot.com/</=
a>
</div>

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