org.apache.hadoop.hive.ql.optimizer

Class PrunerUtils

java.lang.Object

org.apache.hadoop.hive.ql.optimizer.PrunerUtils

public final class PrunerUtils
extends Object

General utility common functions for the Pruner to do optimization.

Method Summary

Modifier and Type	Method and Description
static Map<Node,Object>	walkExprTree(ExprNodeDesc pred, NodeProcessorCtx ctx, SemanticNodeProcessor colProc, SemanticNodeProcessor fieldProc, SemanticNodeProcessor genFuncProc, SemanticNodeProcessor defProc) Walk expression tree for pruner generation.
static void	walkOperatorTree(ParseContext pctx, NodeProcessorCtx opWalkerCtx, SemanticNodeProcessor filterProc, SemanticNodeProcessor defaultProc) Walk operator tree for pruner generation.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

walkOperatorTree

public static void walkOperatorTree(ParseContext pctx,
                                    NodeProcessorCtx opWalkerCtx,
                                    SemanticNodeProcessor filterProc,
                                    SemanticNodeProcessor defaultProc)
                             throws SemanticException

Walk operator tree for pruner generation.

Parameters:

pctx -

opWalkerCtx -

filterProc -

defaultProc -

Throws:

SemanticException

walkExprTree

public static Map<Node,Object> walkExprTree(ExprNodeDesc pred,
                                            NodeProcessorCtx ctx,
                                            SemanticNodeProcessor colProc,
                                            SemanticNodeProcessor fieldProc,
                                            SemanticNodeProcessor genFuncProc,
                                            SemanticNodeProcessor defProc)
                                     throws SemanticException

Walk expression tree for pruner generation.

Parameters:

pred -

ctx -

colProc -

fieldProc -

genFuncProc -

defProc -

Returns:

Throws:

SemanticException