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https://issues.apache.org/jira/browse/HADOOP-3601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12627689#action_12627689
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Ashish Thusoo commented on HADOOP-3601:
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Sorry that was a bit incorrect. What I meant is that we have some untested
support for MAPs in the query layer and what you are likely hitting are the
results of that. You can try lifting the restriction for the integers and see
what happens. We will try that internally as well.
Are you creating this table through a DDL. If that is the case then that would
not work. We do not yet have support for the serde that generically serializes
and deserializes maps and lists. We rely on thrift to do that. So you should
try it with a thrift table. And for now such tables can only be created
programmatically...
Ashish
> Hive as a contrib project
> -------------------------
>
> Key: HADOOP-3601
> URL: https://issues.apache.org/jira/browse/HADOOP-3601
> Project: Hadoop Core
> Issue Type: Wish
> Components: contrib/hive
> Affects Versions: 0.19.0
> Environment: N/A
> Reporter: Joydeep Sen Sarma
> Assignee: Ashish Thusoo
> Priority: Minor
> Fix For: 0.19.0
>
> Attachments: hive.tgz, hive.tgz, hive.tgz, HiveTutorial.pdf
>
> Original Estimate: 1080h
> Remaining Estimate: 1080h
>
> Hive is a data warehouse built on top of flat files (stored primarily in
> HDFS). It includes:
> - Data Organization into Tables with logical and hash partitioning
> - A Metastore to store metadata about Tables/Partitions etc
> - A SQL like query language over object data stored in Tables
> - DDL commands to define and load external data into tables
> Hive's query language is executed using Hadoop map-reduce as the execution
> engine. Queries can use either single stage or multi-stage map-reduce. Hive
> has a native format for tables - but can handle any data set (for example
> json/thrift/xml) using an IO library framework.
> Hive uses Antlr for query parsing, Apache JEXL for expression evaluation and
> may use Apache Derby as an embedded database for MetaStore. Antlr has a BSD
> license and should be compatible with Apache license.
> We are currently thinking of contributing to the 0.17 branch as a contrib
> project (since that is the version under which it will get tested internally)
> - but looking for advice on the best release path.
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