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Posted to dev@pig.apache.org by "Richard Ding (JIRA)" <ji...@apache.org> on 2012/10/24 02:22:11 UTC
[jira] [Created] (PIG-3000) Optimize nested foreach
Richard Ding created PIG-3000:
---------------------------------
Summary: Optimize nested foreach
Key: PIG-3000
URL: https://issues.apache.org/jira/browse/PIG-3000
Project: Pig
Issue Type: Bug
Components: impl
Affects Versions: 0.10.0
Reporter: Richard Ding
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[jira] [Updated] (PIG-3000) Optimize nested foreach
Posted by "Richard Ding (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/PIG-3000?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Richard Ding updated PIG-3000:
------------------------------
Description:
In this Pig script:
{case}
A = load 'data' as (a:chararray);
B = foreach A { c = UPPER(a); generate ((c eq 'TEST') ? 1 : 0), ((c eq 'DEV') ? 1 : 0); }
{case}
> Optimize nested foreach
> -----------------------
>
> Key: PIG-3000
> URL: https://issues.apache.org/jira/browse/PIG-3000
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.10.0
> Reporter: Richard Ding
>
> In this Pig script:
> {case}
> A = load 'data' as (a:chararray);
> B = foreach A { c = UPPER(a); generate ((c eq 'TEST') ? 1 : 0), ((c eq 'DEV') ? 1 : 0); }
> {case}
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[jira] [Updated] (PIG-3000) Optimize nested foreach
Posted by "Richard Ding (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/PIG-3000?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Richard Ding updated PIG-3000:
------------------------------
Description:
In this Pig script:
{code}
A = load 'data' as (a:chararray);
B = foreach A { c = UPPER(a); generate ((c eq 'TEST') ? 1 : 0), ((c eq 'DEV') ? 1 : 0); }
{code}
The Eval function UPPER is called twice for each record.
This should be optimized so that the UPPER is called only once for each record
was:
In this Pig script:
{case}
A = load 'data' as (a:chararray);
B = foreach A { c = UPPER(a); generate ((c eq 'TEST') ? 1 : 0), ((c eq 'DEV') ? 1 : 0); }
{case}
> Optimize nested foreach
> -----------------------
>
> Key: PIG-3000
> URL: https://issues.apache.org/jira/browse/PIG-3000
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.10.0
> Reporter: Richard Ding
>
> In this Pig script:
> {code}
> A = load 'data' as (a:chararray);
> B = foreach A { c = UPPER(a); generate ((c eq 'TEST') ? 1 : 0), ((c eq 'DEV') ? 1 : 0); }
> {code}
> The Eval function UPPER is called twice for each record.
> This should be optimized so that the UPPER is called only once for each record
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