com.akiban.sql.parser
Class AggregateNode

java.lang.Object
  com.akiban.sql.parser.QueryTreeNode
      com.akiban.sql.parser.ValueNode
          com.akiban.sql.parser.UnaryOperatorNode
              com.akiban.sql.parser.AggregateNode

All Implemented Interfaces:

Visitable

Direct Known Subclasses:

GroupConcatNode

public class AggregateNode
extends UnaryOperatorNode

An Aggregate Node is a node that reprsents a set function/aggregate. It used for all system aggregates as well as user defined aggregates.

Field Summary

Fields inherited from class com.akiban.sql.parser.UnaryOperatorNode

methodName, operator, receiverInterfaceType, resultInterfaceType

Fields inherited from class com.akiban.sql.parser.QueryTreeNode

AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX

Constructor Summary

AggregateNode()

Method Summary

void	copyFrom(QueryTreeNode node) Fill this node with a deep copy of the given node.
String	getAggregateName() Get the name of the aggregate.
void	init(Object operand, Object uadClass, Object distinct, Object aggregateName) Intializer.
boolean	isDistinct() Indicate whether this aggregate is distinct or not.
String	toString() Convert this object to a String.

Methods inherited from class com.akiban.sql.parser.UnaryOperatorNode

getMethodName, getOperand, getOperator, init, init, isEquivalent, printSubNodes, setOperand

Methods inherited from class com.akiban.sql.parser.ValueNode

getColumnName, getSchemaName, getSourceResultColumn, getTableName, getType, getTypeId, init, isBinaryEqualsOperatorNode, isBooleanFalse, isBooleanTrue, isConstantExpression, isInListProbeNode, isParameterNode, isRelationalOperator, isSameNodeType, setNullability, setType

Methods inherited from class com.akiban.sql.parser.QueryTreeNode

accept, convertDefaultNode, debugFlush, debugPrint, formatNodeString, getBeginOffset, getDebugOutput, getEndOffset, getNodeFactory, getNodeType, getNullNode, getParserContext, getStatementType, getUserData, init, init, init, init, init, init, init, init, init, init, isInstanceOf, makeTableName, makeTableName, nodeHeader, printLabel, setBeginOffset, setDebugOutput, setEndOffset, setNodeType, setParserContext, setUserData, stackPrint, treePrint, treePrint, treePrint

Methods inherited from class java.lang.Object

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

Constructor Detail

AggregateNode

public AggregateNode()

Method Detail

init

public void init(Object operand,
                 Object uadClass,
                 Object distinct,
                 Object aggregateName)
          throws StandardException

Intializer. Used for user defined and internally defined aggregates. Called when binding a StaticMethodNode that we realize is an aggregate.

Overrides:

init in class QueryTreeNode

Parameters:

operand - the value expression for the aggregate

uadClass - the class name for user aggregate definition for the aggregate or internal aggregate type.

distinct - boolean indicating whether this is distinct or not.

aggregateName - the name of the aggregate from the user's perspective, e.g. MAX

Throws:

StandardException - on error

copyFrom

public void copyFrom(QueryTreeNode node)
              throws StandardException

Fill this node with a deep copy of the given node.

Overrides:

copyFrom in class UnaryOperatorNode

Throws:

StandardException

getAggregateName

public String getAggregateName()

Get the name of the aggregate.

Returns:

the aggregate name

isDistinct

public boolean isDistinct()

Indicate whether this aggregate is distinct or not.

Returns:

true/false

toString

public String toString()

Convert this object to a String. See comments in QueryTreeNode.java for how this should be done for tree printing.

Overrides:

toString in class UnaryOperatorNode

Returns:

This object as a String