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https://issues.apache.org/jira/browse/PIG-833?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12745219#action_12745219
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Raghu Angadi commented on PIG-833:
----------------------------------
Thanks Jing. There are some PIG examples listed at the bottom of Zebra wiki :
http://wiki.apache.org/pig/zebra (wiki is still under construction).
Just listing java strings in Jing's comment with out Jira formatting :
{noformat}
final static String STR_SCHEMA =
"s1:bool, s2:int, s3:long, s4:float, s5:string, s6:bytes, " +
"r1:record(f1:int, f2:long), r2:record(r3:record(f3:float, f4)), " +
"m1:map(string),m2:map(map(int)), c:collection(f13:double, f14:float,
f15:bytes)";
final static String STR_STORAGE =
"[s1, s2]; [m1#{a}]; [r1.f1]; [s3, s4, r2.r3.f3]; [s5, s6, m2#{x|y}]; " +
"[r1.f2, m1#{b}]; [r2.r3.f4, m2#{z}]";
{noformat}
> Storage access layer
> --------------------
>
> Key: PIG-833
> URL: https://issues.apache.org/jira/browse/PIG-833
> Project: Pig
> Issue Type: New Feature
> Reporter: Jay Tang
> Attachments: hadoop20.jar.bz2, PIG-833-zebra.patch,
> PIG-833-zebra.patch.bz2, PIG-833-zebra.patch.bz2,
> TEST-org.apache.hadoop.zebra.pig.TestCheckin1.txt, test.out, zebra-javadoc.tgz
>
>
> A layer is needed to provide a high level data access abstraction and a
> tabular view of data in Hadoop, and could free Pig users from implementing
> their own data storage/retrieval code. This layer should also include a
> columnar storage format in order to provide fast data projection,
> CPU/space-efficient data serialization, and a schema language to manage
> physical storage metadata. Eventually it could also support predicate
> pushdown for further performance improvement. Initially, this layer could be
> a contrib project in Pig and become a hadoop subproject later on.
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