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 |
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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 |
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POLimit |
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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 |
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POUnion |
The union operator that combines the two inputs into a single
stream. |