Package org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators

Class Summary
POCombinerPackage The package operator that packages the globally rearranged tuples into output format after the combiner stage.
PODistinct Find the distinct set of tuples in a bag.
POFilter This is an implementation of the Filter operator.
POForEach  
POFRJoin The operator models the join keys using the Local Rearrange operators which are configured with the plan specified by the user.
POGlobalRearrange Dummy operator to test MRCompiler.
POJoinPackage  
POLimit  
POLoad The load operator which is used in two ways: 1) As a local operator it can be used to load files 2) In the Map Reduce setting, it is used to create jobs from MapReduce operators which keep the loads and stores in the Map and Reduce Plans till the job is created
POLocalRearrange The local rearrange operator is a part of the co-group implementation.
POLocalRearrangeForIllustrate The local rearrange operator is a part of the co-group implementation.
POOptimizedForEach A specialized version of POForeach with the difference that in getNext(), it knows that "input" has already been attached by its input operator which SHOULD be POJoinPackage
POPackage The package operator that packages the globally rearranged tuples into output format as required by co-group.
POPreCombinerLocalRearrange A specialized local rearrange operator which behaves like the regular local rearrange in the getNext() as far as getting its input and constructing the "key" out of the input.
PORead This operator is used to read tuples from a databag in memory.
POSort This implementation is applicable for both the physical plan and for the local backend, as the conversion of physical to mapreduce would see the SORT operator and take necessary steps to convert it to a quantile and a sort job.
POSplit The MapReduce Split operator.
POStore The store operator which is used in two ways: 1) As a local operator it can be used to store files 2) In the Map Reduce setting, it is used to create jobs from MapReduce operators which keep the loads and stores in the Map and Reduce Plans till the job is created
POStream  
POUnion The union operator that combines the two inputs into a single stream.
 



Copyright © ${year} The Apache Software Foundation