You are viewing a plain text version of this content. The canonical link for it is here.
Posted to user@cassandra.apache.org by Jeremiah Jordan <JE...@morningstar.com> on 2011/02/01 18:16:04 UTC
Get column names without getting the data in them
Is there a way to query for column names or super column names without
also pulling down the data they contain? (Besides keeping a second
index) I don't see an obvious way to do it from the Thrift API, but
maybe I'm missing something.
Thanks!
-Jeremiah
________________________________
Jeremiah Jordan
Application Developer
Morningstar, Inc.
Morningstar. Illuminating investing worldwide.
+1 312 696-6128 voice
jeremiah.jordan@morningstar.com
www.morningstar.com
This e-mail contains privileged and confidential information and is
intended only for the use of the person(s) named above. Any
dissemination, distribution, or duplication of this communication
without prior written consent from Morningstar is strictly prohibited.
If you have received this message in error, please contact the sender
immediately and delete the materials from any computer.
Re: Get column names without getting the data in them
Posted by Sasha Dolgy <sd...@gmail.com>.
ah i see ... apologies for the extra bytes
On Tue, Feb 1, 2011 at 10:38 PM, Aaron Morton <aa...@thelastpickle.com>wrote:
> Not at all.
>
> The question was about retrieving the column name without the column value.
> That is not possible.
>
> Aaron
>
>
Re: Get column names without getting the data in them
Posted by Aaron Morton <aa...@thelastpickle.com>.
Not at all.
The question was about retrieving the column name without the column value. That is not possible.
Aaron
On 02 Feb, 2011,at 10:27 AM, Sasha Dolgy <sd...@gmail.com> wrote:
"Cassandra column families are schema-less and like SQL tables, they don't have a fixed number of columns per row. In the same column family, one row may have 5 columns, and another row, 10,000 columns. Every row can possibly have a different number / set of columns."
are you saying the above is incorrect?
-sd
On Tue, Feb 1, 2011 at 9:51 PM, Aaron Morton <aa...@thelastpickle.com> wrote:
Not that I know of.
Aaron
On 2/02/2011, at 6:21 AM, Sasha Dolgy <sd...@gmail.com> wrote:
I asked this on the hector list last week. Its possible but remember, each row can have a different set of associated columns.
On 1 Feb 2011 18:16, "Jeremiah Jordan" <JE...@morningstar.com> wrote:
> Is there a way to query for column names or super column names without
> also pulling down the data they contain? (Besides keeping a second
> index) I don't see an obvious way to do it from the Thrift API, but
> maybe I'm missing something.
>
> Thanks!
> -Jeremiah
>
> ________________________________
> Jeremiah Jordan
> Application Developer
> Morningstar, Inc.
>
> Morningstar. Illuminating investing worldwide.
>
> +1 312 696-6128 voice
> jeremiah.jordan@morningstar.com
>
> www.morningstar.com
>
> This e-mail contains privileged and confidential information and is
> intended only for the use of the person(s) named above. Any
> dissemination, distribution, or duplication of this communication
> without prior written consent from Morningstar is strictly prohibited.
> If you have received this message in error, please contact the sender
> immediately and delete the materials from any computer.
>
--
Sasha Dolgy
sasha.dolgy@gmail.com
Re: Get column names without getting the data in them
Posted by Sasha Dolgy <sd...@gmail.com>.
"Cassandra column families are schema-less and like SQL tables, they don't
have a fixed number of columns per row. In the same column family, one row
may have 5 columns, and another row, 10,000 columns. Every row can possibly
have a different number / set of columns."
are you saying the above is incorrect?
-sd
On Tue, Feb 1, 2011 at 9:51 PM, Aaron Morton <aa...@thelastpickle.com>wrote:
> Not that I know of.
>
> Aaron
>
>
> On 2/02/2011, at 6:21 AM, Sasha Dolgy <sd...@gmail.com> wrote:
>
> I asked this on the hector list last week. Its possible but remember, each
> row can have a different set of associated columns.
> On 1 Feb 2011 18:16, "Jeremiah Jordan" < <JE...@morningstar.com>
> JEREMIAH.JORDAN@morningstar.com> wrote:
> > Is there a way to query for column names or super column names without
> > also pulling down the data they contain? (Besides keeping a second
> > index) I don't see an obvious way to do it from the Thrift API, but
> > maybe I'm missing something.
> >
> > Thanks!
> > -Jeremiah
> >
> > ________________________________
> > Jeremiah Jordan
> > Application Developer
> > Morningstar, Inc.
> >
> > Morningstar. Illuminating investing worldwide.
> >
> > +1 312 696-6128 voice
> > <je...@morningstar.com>jeremiah.jordan@morningstar.com
> >
> > <http://www.morningstar.com>www.morningstar.com
> >
> > This e-mail contains privileged and confidential information and is
> > intended only for the use of the person(s) named above. Any
> > dissemination, distribution, or duplication of this communication
> > without prior written consent from Morningstar is strictly prohibited.
> > If you have received this message in error, please contact the sender
> > immediately and delete the materials from any computer.
> >
>
>
--
Sasha Dolgy
sasha.dolgy@gmail.com
Re: Get column names without getting the data in them
Posted by Aaron Morton <aa...@thelastpickle.com>.
Not that I know of.
Aaron
On 2/02/2011, at 6:21 AM, Sasha Dolgy <sd...@gmail.com> wrote:
> I asked this on the hector list last week. Its possible but remember, each row can have a different set of associated columns.
>
> On 1 Feb 2011 18:16, "Jeremiah Jordan" <JE...@morningstar.com> wrote:
> > Is there a way to query for column names or super column names without
> > also pulling down the data they contain? (Besides keeping a second
> > index) I don't see an obvious way to do it from the Thrift API, but
> > maybe I'm missing something.
> >
> > Thanks!
> > -Jeremiah
> >
> > ________________________________
> > Jeremiah Jordan
> > Application Developer
> > Morningstar, Inc.
> >
> > Morningstar. Illuminating investing worldwide.
> >
> > +1 312 696-6128 voice
> > jeremiah.jordan@morningstar.com
> >
> > www.morningstar.com
> >
> > This e-mail contains privileged and confidential information and is
> > intended only for the use of the person(s) named above. Any
> > dissemination, distribution, or duplication of this communication
> > without prior written consent from Morningstar is strictly prohibited.
> > If you have received this message in error, please contact the sender
> > immediately and delete the materials from any computer.
> >
Re: Get column names without getting the data in them
Posted by Sasha Dolgy <sd...@gmail.com>.
I asked this on the hector list last week. Its possible but remember, each
row can have a different set of associated columns.
On 1 Feb 2011 18:16, "Jeremiah Jordan" <JE...@morningstar.com>
wrote:
> Is there a way to query for column names or super column names without
> also pulling down the data they contain? (Besides keeping a second
> index) I don't see an obvious way to do it from the Thrift API, but
> maybe I'm missing something.
>
> Thanks!
> -Jeremiah
>
> ________________________________
> Jeremiah Jordan
> Application Developer
> Morningstar, Inc.
>
> Morningstar. Illuminating investing worldwide.
>
> +1 312 696-6128 voice
> jeremiah.jordan@morningstar.com
>
> www.morningstar.com
>
> This e-mail contains privileged and confidential information and is
> intended only for the use of the person(s) named above. Any
> dissemination, distribution, or duplication of this communication
> without prior written consent from Morningstar is strictly prohibited.
> If you have received this message in error, please contact the sender
> immediately and delete the materials from any computer.
>