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Hive, mail # dev - perl code generated from thrift


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perl code generated from thrift
Stephen Sprague 2012-05-29, 15:46
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