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https://issues.apache.org/jira/browse/PIG-3500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13788761#comment-13788761
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Mark Wagner commented on PIG-3500:
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Looks pretty good. The only major thing that stuck out is that for Tez, the
special treatment of shuffles (Custom partitioners and combiners) needs to be
associated with the inputs/outputs and not the TezOper since there can be many
inputs/outputs. In the interest of progress on the Tez branch, I think it's
best to commit this (with a couple small changes I noted and whatever others
comment on) and handle the multi-combiner logic later. Do others have any
problem with that?
> Initial implementation of TezCompiler
> -------------------------------------
>
> Key: PIG-3500
> URL: https://issues.apache.org/jira/browse/PIG-3500
> Project: Pig
> Issue Type: Sub-task
> Components: tez
> Affects Versions: tez-branch
> Reporter: Cheolsoo Park
> Assignee: Cheolsoo Park
> Fix For: tez-branch
>
> Attachments: PIG-3500-1.patch, PIG-3500-2.patch
>
>
> Implement TezCompiler that compiles physical plan into tez plan. To begin
> with, we can implement the initial version that works for basic queries as
> follows:
> # Load-Filter-Store
> {code}
> a = load 'file:///tmp/input' as (x:int, y:int);
> b = filter a by x > 0;
> c = foreach b generate y;
> store c into 'file:///tmp/output';
> {code}
> # Load-Filter-GroupBy-Store
> {code}
> a = load 'file:///tmp/input' as (x:int, y:int);
> b = group a by x;
> c = foreach b generate group, a;
> store c into 'file:///tmp/output';
> {code}
> # Load1-Load2-Join-Store
> {code}
> a = load 'file:///tmp/input1' as (x:int, y:int);
> b = load 'file:///tmp/input2' as (x:int, z:int);
> c = join a by x, b by x;
> d = foreach c generate a::x as x, y, z;
> store d into 'file:///tmp/output';
> {code}
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