Dave Beech created AVRO-1219:
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Summary: Add support for grouping comparators without an
implementation of the RawComparator interface
Key: AVRO-1219
URL: https://issues.apache.org/jira/browse/AVRO-1219
Project: Avro
Issue Type: Improvement
Components: java
Affects Versions: 1.7.3
Reporter: Dave Beech
Assignee: Dave Beech
Priority: Minor
>From
>http://mail-archives.apache.org/mod_mbox/avro-user/201212.mbox/%3CCAFZSZPvKcSTf84hwqOhZ7OchtcnxmDwp1krYaaq2qsLDtV0brw%40mail.gmail.com%3E
Summary:
If you want to use a grouping comparator with the "new" mapreduce API and Avro,
you must provide an implementation of RawComparator compare(byte[] b1, int s1,
int l1, byte[] b2, int s2, int l2).
In standard mapreduce, you don't have to do this. Hadoop does it for you behind
the scenes by deserializing the writables and calling compare(x,y)
instead.
We should provide a subclass of AvroKeyComparator which does the
deserialization and delegates to compare(x,y) to be consistent with Hadoop
mapreduce.
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