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java.lang.Objectorg.apache.hadoop.hive.ql.optimizer.physical.BucketingSortingOpProcFactory.DefaultInferrer
org.apache.hadoop.hive.ql.optimizer.physical.BucketingSortingOpProcFactory.GroupByInferrer
public static class BucketingSortingOpProcFactory.GroupByInferrer
Processor for GroupBy operator. This handles the standard use of a group by operator, the tree should look like ReduceSinkOperator --- GroupByOperator It is up to the caller to guarantee the tree matches this pattern.
Constructor Summary | |
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BucketingSortingOpProcFactory.GroupByInferrer()
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Method Summary | |
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Object |
process(Node nd,
Stack<Node> stack,
NodeProcessorCtx procCtx,
Object... nodeOutputs)
Generic process for all ops that don't have specific implementations. |
protected Object |
processGroupBy(Operator<? extends OperatorDesc> parent,
GroupByOperator gop,
BucketingSortingCtx bctx)
Process a GroupByOperator to determine which if any columns the output is bucketed and sorted by, assumes the columns output by the parent which are bucketed and sorted have already been determined. |
protected void |
processGroupByReduceSink(ReduceSinkOperator rop,
GroupByOperator gop,
BucketingSortingCtx bctx)
Process the ReduceSinkOperator preceding a GroupByOperator to determine which columns are bucketed and sorted. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public BucketingSortingOpProcFactory.GroupByInferrer()
Method Detail |
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public Object process(Node nd, Stack<Node> stack, NodeProcessorCtx procCtx, Object... nodeOutputs) throws SemanticException
NodeProcessor
process
in interface NodeProcessor
process
in class BucketingSortingOpProcFactory.DefaultInferrer
nd
- operator to processprocCtx
- operator processor contextnodeOutputs
- A variable argument list of outputs from other nodes in the walk
SemanticException
protected void processGroupByReduceSink(ReduceSinkOperator rop, GroupByOperator gop, BucketingSortingCtx bctx)
rop
- gop
- bctx
- protected Object processGroupBy(Operator<? extends OperatorDesc> parent, GroupByOperator gop, BucketingSortingCtx bctx)
parent
- gop
- bctx
-
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