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Posted to user@pig.apache.org by paradisehit <pa...@163.com> on 2008/10/21 03:55:56 UTC

How to learn the structure of Logical Plan and Physical Plan?

 
 I found that the structure of LogicalPlan described in wiki: http://wiki.apache.org/pig/PigExecutionModel is different with the codes in the types-stable-1.

If I want to know more about the translation of the Plans(Logical and Physical), which book or paper can I learn? thanks!

Re: How to learn the structure of Logical Plan and Physical Plan?

Posted by Alan Gates <ga...@yahoo-inc.com>.

Unfortunately there is not yet a comprehensive design document for  
pig.  We have tried to put design info into the java docs, so looking  
at the package and class headers (especially in  
org.apache.pig.impl.logicalPlan and  
org.apache.pig.backend.hadoop.executionengine.physicalPlan) will give  
you some info on this.

Alan.

On Oct 20, 2008, at 6:55 PM, paradisehit wrote:

>
>  I found that the structure of LogicalPlan described in wiki:  
> http://wiki.apache.org/pig/PigExecutionModel is different with the  
> codes in the types-stable-1.
>
> If I want to know more about the translation of the Plans(Logical  
> and Physical), which book or paper can I learn? thanks!
>
>
>