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Date: Tue, 2 Feb 2010 07:35:46 -0800
Message-ID: <74f4d40b1002020735i6a6db83av4976674be152f539@mail.gmail.com>
Subject: Re: How to retrieve keys from Cassandra ?
From: Erik Holstad <erikholstad@gmail.com>
To: cassandra-user@incubator.apache.org
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Hi Sebastien!
I'm totally new to Cassandra, but as far as I know there is no way of
getting just the keys that are in the
database, they are not stored separately but only with the data itself.

Why do you want a list of keys, what are you going to use them for? Maybe
there is another way of solving
your problem.

What you are describing, getting all the keys/rows for a given column sound=
s
like you have to fetch all the
data that you have and then filter every key on your column, I don't think
that get_key_range will do that for
you even, says that it takes column_family, but like I said I'm totally new

Erik

2010/2/2 S=E9bastien Pierre <sebastien.pierre@gmail.com>

> Hi all,
>
> I would like to know how to retrieve the list of available keys available
> for a specific column. There is the get_key_range method, but it is only
> available when using the OrderPreservingPartitioner -- I use a
> RandomPartitioner.
>
> Does this mean that when using a RandomPartitioner, you cannot see which
> keys are available in the database ?
>
>  -- S=E9bastien
>


--=20
Regards Erik

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Hi Sebastien!<br>I&#39;m totally new to Cassandra, but as far as I know the=
re is no way of getting just the keys that are in the<br>database, they are=
 not stored separately but only with the data itself.<br><br>Why do you wan=
t a list of keys, what are you going to use them for? Maybe there is anothe=
r way of solving<br>
your problem.<br><br>What you are describing, getting all the keys/rows for=
 a given column sounds like you have to fetch all the <br>data that you hav=
e and then filter every key on your column, I don&#39;t think that get_key_=
range will do that for<br>
you even, says that it takes column_family, but like I said I&#39;m totally=
 new<br><br>Erik<br><br><div class=3D"gmail_quote">2010/2/2 S=E9bastien Pie=
rre <span dir=3D"ltr">&lt;<a href=3D"mailto:sebastien.pierre@gmail.com">seb=
astien.pierre@gmail.com</a>&gt;</span><br>
<blockquote class=3D"gmail_quote" style=3D"border-left: 1px solid rgb(204, =
204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi all,<div><br><=
/div><div>I would like to know how to retrieve the list of available keys a=
vailable for a specific column. There is the get_key_range method, but it i=
s only available when using the OrderPreservingPartitioner -- I use a Rando=
mPartitioner.</div>


<div><br>Does this mean that when using a RandomPartitioner, you cannot see=
 which keys are available in the database ?</div><div><br></div><font color=
=3D"#888888"><div>=A0-- S=E9bastien</div>
</font></blockquote></div><br><br clear=3D"all"><br>-- <br>Regards Erik<br>

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