public static class OpProcFactory.DefaultPPD extends java.lang.Object implements NodeProcessor
Constructor and Description |
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DefaultPPD() |
Modifier and Type | Method and Description |
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protected void |
logExpr(Node nd,
ExprWalkerInfo ewi) |
protected ExprWalkerInfo |
mergeChildrenPred(Node nd,
OpWalkerInfo owi,
java.util.Set<java.lang.String> excludedAliases,
boolean ignoreAliases) |
protected boolean |
mergeWithChildrenPred(Node nd,
OpWalkerInfo owi,
ExprWalkerInfo ewi,
java.util.Set<java.lang.String> aliases,
boolean ignoreAliases)
Take current operators pushdown predicates and merges them with
children's pushdown predicates.
|
java.lang.Object |
process(Node nd,
java.util.Stack<Node> stack,
NodeProcessorCtx procCtx,
java.lang.Object... nodeOutputs)
Generic process for all ops that don't have specific implementations.
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public java.lang.Object process(Node nd, java.util.Stack<Node> stack, NodeProcessorCtx procCtx, java.lang.Object... nodeOutputs) throws SemanticException
NodeProcessor
process
in interface NodeProcessor
nd
- operator to processprocCtx
- operator processor contextnodeOutputs
- A variable argument list of outputs from other nodes in the walkSemanticException
protected void logExpr(Node nd, ExprWalkerInfo ewi)
nd
- ewi
- protected boolean mergeWithChildrenPred(Node nd, OpWalkerInfo owi, ExprWalkerInfo ewi, java.util.Set<java.lang.String> aliases, boolean ignoreAliases) throws SemanticException
nd
- current operatorowi
- operator context during this walkewi
- pushdown predicates (part of expression walker info)aliases
- aliases that this operator can pushdown. null means that all
aliases can be pushed downignoreAliases
- SemanticException
protected ExprWalkerInfo mergeChildrenPred(Node nd, OpWalkerInfo owi, java.util.Set<java.lang.String> excludedAliases, boolean ignoreAliases) throws SemanticException
SemanticException
Copyright © 2012 The Apache Software Foundation