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Posted to user@hbase.apache.org by Charles Mason <ch...@gmail.com> on 2008/09/18 18:31:57 UTC

A Problem With The Thrift Scanner Interface

Hi All,

I have been working on interfacing HBase with C# using thrift. I am
currently writing a lightweight ORM style wrapper to make interfacing
with data in HBase easier. I am currently trying to implement a
scanner and I am running in to a problem.

The scannerOpen function seems to always require a column list, wear
as with the REST interface it can be left empty in which case all a
rows columns are returned. If I provide an empty column list via
Thrift no columns are returned.

Is there something I am missing or this just a missing future with the
thrift interface? I am running the 0.2 release.

Charlie M

Re: A Problem With The Thrift Scanner Interface

Posted by Jean-Daniel Cryans <jd...@apache.org>.

Good on you Tim!

J-D

On Fri, Sep 19, 2008 at 9:01 AM, Tim Sell <tr...@gmail.com> wrote:

> I saw you're jira (HBASE-889) Charles, I'm upload a fix soon.
>
> ~Tim.
>
> 2008/9/18 Jean-Daniel Cryans <jd...@apache.org>:
> > Charles,
> >
> > I'm not a big Thrift user but by reading the code I think you are right:
> >
> >        byte [][] columnsText = new byte[columns.size()][];
> >        for (int i = 0; i < columns.size(); ++i) {
> >          columnsText[i] = getText(columns.get(i));
> >        }
> >        Scanner scanner = table.getScanner(columnsText,
> >            getText(startRow));
> >
> > Current IDL is not as complete as it should be, feel free to open a new
> > issue in Jira <https://issues.apache.org/jira/browse/HBASE> so that
> someone
> > can post a patch.
> >
> > Thx,
> >
> > J-D
> >
> > On Thu, Sep 18, 2008 at 12:31 PM, Charles Mason <charlie.mas@gmail.com
> >wrote:
> >
> >> Hi All,
> >>
> >> I have been working on interfacing HBase with C# using thrift. I am
> >> currently writing a lightweight ORM style wrapper to make interfacing
> >> with data in HBase easier. I am currently trying to implement a
> >> scanner and I am running in to a problem.
> >>
> >> The scannerOpen function seems to always require a column list, wear
> >> as with the REST interface it can be left empty in which case all a
> >> rows columns are returned. If I provide an empty column list via
> >> Thrift no columns are returned.
> >>
> >> Is there something I am missing or this just a missing future with the
> >> thrift interface? I am running the 0.2 release.
> >>
> >> Charlie M
> >>
> >
>

Re: A Problem With The Thrift Scanner Interface

Posted by Tim Sell <tr...@gmail.com>.

I saw you're jira (HBASE-889) Charles, I'm upload a fix soon.

~Tim.

2008/9/18 Jean-Daniel Cryans <jd...@apache.org>:
> Charles,
>
> I'm not a big Thrift user but by reading the code I think you are right:
>
>        byte [][] columnsText = new byte[columns.size()][];
>        for (int i = 0; i < columns.size(); ++i) {
>          columnsText[i] = getText(columns.get(i));
>        }
>        Scanner scanner = table.getScanner(columnsText,
>            getText(startRow));
>
> Current IDL is not as complete as it should be, feel free to open a new
> issue in Jira <https://issues.apache.org/jira/browse/HBASE> so that someone
> can post a patch.
>
> Thx,
>
> J-D
>
> On Thu, Sep 18, 2008 at 12:31 PM, Charles Mason <ch...@gmail.com>wrote:
>
>> Hi All,
>>
>> I have been working on interfacing HBase with C# using thrift. I am
>> currently writing a lightweight ORM style wrapper to make interfacing
>> with data in HBase easier. I am currently trying to implement a
>> scanner and I am running in to a problem.
>>
>> The scannerOpen function seems to always require a column list, wear
>> as with the REST interface it can be left empty in which case all a
>> rows columns are returned. If I provide an empty column list via
>> Thrift no columns are returned.
>>
>> Is there something I am missing or this just a missing future with the
>> thrift interface? I am running the 0.2 release.
>>
>> Charlie M
>>
>

Re: A Problem With The Thrift Scanner Interface

Posted by Jean-Daniel Cryans <jd...@apache.org>.

Charles,

I'm not a big Thrift user but by reading the code I think you are right:

        byte [][] columnsText = new byte[columns.size()][];
        for (int i = 0; i < columns.size(); ++i) {
          columnsText[i] = getText(columns.get(i));
        }
        Scanner scanner = table.getScanner(columnsText,
            getText(startRow));

Current IDL is not as complete as it should be, feel free to open a new
issue in Jira <https://issues.apache.org/jira/browse/HBASE> so that someone
can post a patch.

Thx,

J-D

On Thu, Sep 18, 2008 at 12:31 PM, Charles Mason <ch...@gmail.com>wrote:

> Hi All,
>
> I have been working on interfacing HBase with C# using thrift. I am
> currently writing a lightweight ORM style wrapper to make interfacing
> with data in HBase easier. I am currently trying to implement a
> scanner and I am running in to a problem.
>
> The scannerOpen function seems to always require a column list, wear
> as with the REST interface it can be left empty in which case all a
> rows columns are returned. If I provide an empty column list via
> Thrift no columns are returned.
>
> Is there something I am missing or this just a missing future with the
> thrift interface? I am running the 0.2 release.
>
> Charlie M
>