Hive uses thrift in two places 1) HiveServer 2)Metastore . Search in
the metastore directory for the thrift interface file and compile
that.
Then you should get a class generated for hive_metastore.Schema
Edward
On Tue, May 29, 2012 at 11:46 AM, Stephen Sprague <sprag...@gmail.com> wrote:
> Hi Good People,
> I am totally stumped on this one. Wondered if a "perl" bindings chap on
> this list might be able to help me.
>
> I generated the ThrftHive.pm class as follows (see below) from my download
> area. I've tested some basic examples of querying - and it works well.
> The one thing that i can't get to work, though, is a call to
> "$client->getSchema()" in order to ascertain the schema of a result set.
>
> * this built ThriftHIve.pm
>
> $ thrift -r \
> -I $HOME/downloads/hive-0.9.0/src/ql \
> -I $HOME/downloads/hive-0.9.0/src \
> -I $HOME/downloads/thrift-0.8.0 \
> \
> -gen perl \
> \
> $HOME/downloads/hive-0.9.0/src/service/if/hive_service.thrift
>
>
>
>
> * in hive_service.thrift here are the relevant lines (that i can tell)
>
> #the includes
> include "contrib/fb303/if/fb303.thrift"
> include "metastore/if/hive_metastore.thrift"
> include "ql/if/queryplan.thrift"
> namespace java org.apache.hadoop.hive.service
> namespace cpp Apache.Hadoop.Hive
>
> <snip>
> #the getSchema() reference
> service ThriftHive extends hive_metastore.ThriftHiveMetastore {
> <snip>
> # Get a schema object with fields represented with native Hive types
> hive_metastore.Schema getSchema() throws(1:HiveServerException ex)
>
>
> * the relevant line in ThriftHive.pm that throws an undefined method call:
>
> Undefined subroutine &ThriftHive_getSchema_result::Schema called at
> /home/spragues/downloads/thrift-0.8.0/gen-perl/ThriftHive.pm line 672.
>
> $self->{success} = new Schema();
> $xfer += $self->{success}->read($input);
>
>
> Where 'o where is this "Schema" class supposed to be? Any pointers, clues,
> suggestions, bread crumbs most welcome!
>
> Thanks
> Stephen
