org.apache.hadoop.hive.metastore.parser

Class ExpressionTree.LeafNode

java.lang.Object

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

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

Enclosing class:

ExpressionTree

public static class ExpressionTree.LeafNode
extends ExpressionTree.TreeNode

The Class representing the leaf level nodes in the ExpressionTree.

Field Summary

Fields

Modifier and Type	Field and Description
boolean	isReverseOrder
String	keyName
ExpressionTree.Operator	operator
Object	value Constant expression side of the operator.

Constructor Summary

Constructors

Constructor and Description
LeafNode()

Method Summary

Modifier and Type	Method and Description
protected void	accept(ExpressionTree.TreeVisitor visitor) Double dispatch for TreeVisitor.
boolean	canJdoUseStringsWithIntegral()
void	generateJDOFilter(org.apache.hadoop.conf.Configuration conf, Table table, Map<String,Object> params, ExpressionTree.FilterBuilder filterBuilder) Generates a JDO filter statement
int	getPartColIndexForFilter(Table table, ExpressionTree.FilterBuilder filterBuilder) Get partition column index in the table partition column list that corresponds to the key that is being filtered on by this tree node.

Methods inherited from class org.apache.hadoop.hive.metastore.parser.ExpressionTree.TreeNode

getAndOr, getLhs, getRhs

Methods inherited from class java.lang.Object

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

Field Detail

keyName

public String keyName

operator

public ExpressionTree.Operator operator

value

public Object value

Constant expression side of the operator. Can currently be a String or a Long.

isReverseOrder

public boolean isReverseOrder

Constructor Detail

LeafNode

public LeafNode()

Method Detail

accept

protected void accept(ExpressionTree.TreeVisitor visitor)
               throws MetaException

Description copied from class: ExpressionTree.TreeNode

Double dispatch for TreeVisitor.

Overrides:

accept in class ExpressionTree.TreeNode

Throws:

MetaException

generateJDOFilter

public void generateJDOFilter(org.apache.hadoop.conf.Configuration conf,
                              Table table,
                              Map<String,Object> params,
                              ExpressionTree.FilterBuilder filterBuilder)
                       throws MetaException

Description copied from class: ExpressionTree.TreeNode

Generates a JDO filter statement

Overrides:

generateJDOFilter in class ExpressionTree.TreeNode

table - The table on which the filter is applied. If table is not null, then this method generates a JDO statement to get all partitions of the table that match the filter. If table is null, then this method generates a JDO statement to get all tables that match the filter.

params - A map of parameter key to values for the filter statement.

Throws:

MetaException

canJdoUseStringsWithIntegral

public boolean canJdoUseStringsWithIntegral()

Parameters:

operator - operator

Returns:

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

getPartColIndexForFilter

public int getPartColIndexForFilter(Table table,
                                    ExpressionTree.FilterBuilder filterBuilder)
                             throws MetaException

Get partition column index in the table partition column list that corresponds to the key that is being filtered on by this tree node.

Parameters:

table - The table.

filterBuilder - filter builder used to report error, if any.

Returns:

The index.

Throws:

MetaException