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Posted to dev@pig.apache.org by "Anand Murugappan (JIRA)" <ji...@apache.org> on 2008/09/05 22:50:44 UTC
[jira] Created: (PIG-420) Limit on nothing functionality
Limit on nothing functionality
------------------------------
Key: PIG-420
URL: https://issues.apache.org/jira/browse/PIG-420
Project: Pig
Issue Type: Improvement
Reporter: Anand Murugappan
Pig 2.0 implements the limit feature but as a standalone statement.
Limit is very useful in debug mode where we could run queries on smaller amount of data (faster and on fewer nodes) to iron out issues but in the production mode we would like to run through all the data. It would be good to have a easy "switch" between debug and prod mode using the limit statement without having to change the underlying code templates. Given that LIMIT is a separate standalone statement it gets hardware to parametrize the code.
For instance a query template might look like,
A = LOAD '...';
B = LIMIT A $N;
C = FOREACH B ....
In debug mode, we would like to set the variable $N to 100 but in prod mode we would like to set it to a 'special value' that would not apply LIMIT and letting us run it on all the data.
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[jira] Updated: (PIG-420) Limit on nothing functionality
Posted by "Anand Murugappan (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/PIG-420?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Anand Murugappan updated PIG-420:
---------------------------------
Description:
Pig 2.0 implements the limit feature but as a standalone statement.
Limit is very useful in debug mode where we could run queries on smaller amount of data (faster and on fewer nodes) to iron out issues but in the production mode we would like to run through all the data. It would be good to have a easy "switch" between debug and prod mode using the limit statement without having to change the underlying code templates. Given that LIMIT is a separate standalone statement it gets hard to parametrize the code.
For instance a query template might look like,
A = LOAD '...';
B = LIMIT A $N;
C = FOREACH B ....
In debug mode, we would like to set the variable $N to 100 but in prod mode we would like to set it to a 'special value' that would not apply LIMIT and letting us run it on all the data.
was:
Pig 2.0 implements the limit feature but as a standalone statement.
Limit is very useful in debug mode where we could run queries on smaller amount of data (faster and on fewer nodes) to iron out issues but in the production mode we would like to run through all the data. It would be good to have a easy "switch" between debug and prod mode using the limit statement without having to change the underlying code templates. Given that LIMIT is a separate standalone statement it gets hardware to parametrize the code.
For instance a query template might look like,
A = LOAD '...';
B = LIMIT A $N;
C = FOREACH B ....
In debug mode, we would like to set the variable $N to 100 but in prod mode we would like to set it to a 'special value' that would not apply LIMIT and letting us run it on all the data.
> Limit on nothing functionality
> ------------------------------
>
> Key: PIG-420
> URL: https://issues.apache.org/jira/browse/PIG-420
> Project: Pig
> Issue Type: Improvement
> Reporter: Anand Murugappan
>
> Pig 2.0 implements the limit feature but as a standalone statement.
> Limit is very useful in debug mode where we could run queries on smaller amount of data (faster and on fewer nodes) to iron out issues but in the production mode we would like to run through all the data. It would be good to have a easy "switch" between debug and prod mode using the limit statement without having to change the underlying code templates. Given that LIMIT is a separate standalone statement it gets hard to parametrize the code.
> For instance a query template might look like,
> A = LOAD '...';
> B = LIMIT A $N;
> C = FOREACH B ....
> In debug mode, we would like to set the variable $N to 100 but in prod mode we would like to set it to a 'special value' that would not apply LIMIT and letting us run it on all the data.
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