org.apache.hadoop.hive.metastore.parser

Class ExpressionTree.JDOFilterGenerator

java.lang.Object

org.apache.hadoop.hive.metastore.parser.ExpressionTree.TreeVisitor

org.apache.hadoop.hive.metastore.parser.ExpressionTree.JDOFilterGenerator

Enclosing class:

ExpressionTree

public static class ExpressionTree.JDOFilterGenerator
extends ExpressionTree.TreeVisitor

Generate the JDOQL filter for the given expression tree

Constructor Summary

Constructors

Constructor and Description
JDOFilterGenerator(org.apache.hadoop.conf.Configuration conf, List<FieldSchema> partitionKeys, ExpressionTree.FilterBuilder filterBuilder, Map<String,Object> params)

Method Summary

Modifier and Type	Method and Description
protected void	beginTreeNode(ExpressionTree.TreeNode node)
boolean	canJdoUseStringsWithIntegral()
protected void	endTreeNode(ExpressionTree.TreeNode node)
protected void	midTreeNode(ExpressionTree.TreeNode node)
protected boolean	shouldStop()
protected void	visit(ExpressionTree.LeafNode node)

Methods inherited from class java.lang.Object

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

Constructor Detail

JDOFilterGenerator

public JDOFilterGenerator(org.apache.hadoop.conf.Configuration conf,
                          List<FieldSchema> partitionKeys,
                          ExpressionTree.FilterBuilder filterBuilder,
                          Map<String,Object> params)

Method Detail

beginTreeNode

protected void beginTreeNode(ExpressionTree.TreeNode node)
                      throws MetaException

Overrides:

beginTreeNode in class ExpressionTree.TreeVisitor

Throws:

MetaException

midTreeNode

protected void midTreeNode(ExpressionTree.TreeNode node)
                    throws MetaException

Overrides:

midTreeNode in class ExpressionTree.TreeVisitor

Throws:

MetaException

endTreeNode

protected void endTreeNode(ExpressionTree.TreeNode node)
                    throws MetaException

Overrides:

endTreeNode in class ExpressionTree.TreeVisitor

Throws:

MetaException

visit

protected void visit(ExpressionTree.LeafNode node)
              throws MetaException

Overrides:

visit in class ExpressionTree.TreeVisitor

Throws:

MetaException

shouldStop

protected boolean shouldStop()

Overrides:

shouldStop in class ExpressionTree.TreeVisitor

canJdoUseStringsWithIntegral

public boolean canJdoUseStringsWithIntegral()

Returns:

true iff filter pushdown for this operator can be done for integral types.