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From Sameer Farooqui <cassandral...@gmail.com>
Subject Re: Is there a way to read a Double value from the CLI?
Date Mon, 18 Jul 2011 21:34:08 GMT
Yup, Jonathan, I was just temporarily returning the value as LongType b/c I
couldn't find a DoubleType. Since LongType returned something, I know that
the data is there.

Thanks for that link, Jeremy. I'm guessing DoubleType hasn't found its way
into the CLI yet, b/c I tried this and got an error:

[default@DemoKS] get DemoCF[ascii('ABC_100000000020')][long(20090101000000)]
as DoubleType;
Unknown comparator 'DoubleType'. Available functions: bytes, integer, long,
lexicaluuid, timeuuid, utf8, ascii, countercolumn.




On Mon, Jul 18, 2011 at 2:28 PM, Jonathan Ellis <jbellis@gmail.com> wrote:

> "get X as LongType" will give you the bytes in that column value
> interpreted as a long.
>
> So it did exactly what you asked it to do :)
>
> On Mon, Jul 18, 2011 at 4:16 PM, Sameer Farooqui
> <cassandralabs@gmail.com> wrote:
> > I wrote some data to a standard column family (using Hector) with ASCII
> > row-key, Long column name and Double column value.
> >
> > The CLI doesn't seem to have a double data type to interpret the column
> > value for display.
> >
> > [default@DemoKS] get
> DemoCF[ascii('ABC_100000000020')][long(20090101000000)]
> > as LongType;
> > => (column=0000124597556740, value=4629084924887308954,
> > timestamp=1310144024947000)
> >
> > But that value is not exactly correct. It should be: 29.813332976331914
> >
> >
> > This is how I do the read in Hector:
> >
> >         ColumnQuery<String, Long, Double> columnQuery =
> > HFactory.createColumnQuery(keyspace, ss, ls, ds);
> >
> >
> >
> columnQuery.setColumnFamily("DemoCF").setKey("ABC_100000000020").setName(20090101000000L);
> >
> >         QueryResult<HColumn<Long, Double>> result =
> columnQuery.execute();
> >
> >         System.out.println("Query result: " + result.get());
> >
> >
> > Is there a equivalent for that in Cassandra CLI?
> >
> > - Sameer
> >
> >
>
>
>
> --
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of DataStax, the source for professional Cassandra support
> http://www.datastax.com
>

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