Hey Harsh,
thanks. I can confirm that the first one works. Let me try the second one.
Tomas
On Sun, Feb 16, 2014 at 8:07 AM, Harsh J ha...@cloudera.com wrote:
Hi,
For (1) I believe you could do a Schema.parse meta['avro.schema'] to
obtain the schema as an object from the meta entry of the file.
For (2), as defined in the spec at
http://avro.apache.org/docs/current/spec.html#Object+Container+Files,
since the schema is stored only in the header of the file, using a
simple initialised reader will be efficient in reading just that. The
file's data blocks are read only upon enumerating over the reader.
On Sun, Feb 16, 2014 at 4:52 AM, Tomas Svarovsky
svarovsky.to...@gmail.com wrote:
Hey,
I wanted to ask couple of questions.
1) Let's assume I have 2 avro files. I would like to grab schemas of
both.
Compare them and decide what to do. The only way I found to get to the
schema in a reader is through
dr = Avro::DataFile::Reader.new(file, Avro::IO::DatumReader.new)
dr.meta
and that is still stringified JSON. Is this the only way or even is this
use
case something supported or should I do it differently?
2) Also is ti possible to read just the schema? Sometimes it is useful to
look at a file without actually reading the whole file let's say from s3.
Regards Tomas
--
Harsh J
