org.apache.derby.impl.sql.compile

Class GroupByColumn

java.lang.Object

org.apache.derby.impl.sql.compile.QueryTreeNode

org.apache.derby.impl.sql.compile.OrderedColumn

org.apache.derby.impl.sql.compile.GroupByColumn

All Implemented Interfaces:

Node, Visitable

public class GroupByColumn
extends OrderedColumn

A GroupByColumn is a column in the GROUP BY clause.

Field Summary

Fields

Modifier and Type	Field and Description
private ValueNode	columnExpression

Fields inherited from class org.apache.derby.impl.sql.compile.OrderedColumn

columnPosition, UNMATCHEDPOSITION

Fields inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode

AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX

Constructor Summary

Constructors

Constructor and Description
GroupByColumn()

Method Summary

Methods

Modifier and Type	Method and Description
(package private) void	acceptChildren(Visitor v) Accept the visitor for all visitable children of this node.
void	bindExpression(FromList fromList, SubqueryList subqueryList, java.util.List aggregateVector) Bind this grouping column.
ValueNode	getColumnExpression()
java.lang.String	getColumnName() Get the name of this column
void	init(java.lang.Object colRef) Initializer.
void	printSubNodes(int depth) Prints the sub-nodes of this object.
void	setColumnExpression(ValueNode cexpr)

Methods inherited from class org.apache.derby.impl.sql.compile.OrderedColumn

getColumnPosition, isAscending, isNullsOrderedLow, setColumnPosition, toString

Methods inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode

accept, bindOffsetFetch, bindRowMultiSet, bindUserCatalogType, bindUserType, checkReliability, checkReliability, convertDefaultNode, createTypeDependency, debugFlush, debugPrint, disablePrivilegeCollection, formatNodeString, foundString, generate, generateAuthorizeCheck, getBeginOffset, getClassFactory, getCompilerContext, getContextManager, getCursorInfo, getDataDictionary, getDependencyManager, getEndOffset, getExecutionFactory, getGenericConstantActionFactory, getIntProperty, getLanguageConnectionContext, getNodeFactory, getNodeType, getNullNode, getParameterTypes, getSchemaDescriptor, getSchemaDescriptor, getStatementType, getTableDescriptor, getTypeCompiler, init, init, init, init, init, init, init, init, init, init, init, init, init, isAtomic, isInstanceOf, isPrivilegeCollectionRequired, isSessionSchema, isSessionSchema, makeConstantAction, makeTableName, makeTableName, nodeHeader, orReliability, parseStatement, printLabel, referencesSessionSchema, resolveTableToSynonym, setBeginOffset, setContextManager, setEndOffset, setNodeType, setRefActionInfo, stackPrint, treePrint, treePrint, verifyClassExist

Methods inherited from class java.lang.Object

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

Field Detail

columnExpression

private ValueNode columnExpression

Constructor Detail

GroupByColumn

public GroupByColumn()

Method Detail

init

public void init(java.lang.Object colRef)

Initializer.

Specified by:

init in interface Node

Overrides:

init in class QueryTreeNode

Parameters:

colRef - The ColumnReference for the grouping column

printSubNodes

public void printSubNodes(int depth)

Prints the sub-nodes of this object. See QueryTreeNode.java for how tree printing is supposed to work.

Overrides:

printSubNodes in class QueryTreeNode

Parameters:

depth - The depth of this node in the tree

getColumnName

public java.lang.String getColumnName()

Get the name of this column

Returns:

The name of this column

bindExpression

public void bindExpression(FromList fromList,
                  SubqueryList subqueryList,
                  java.util.List aggregateVector)
                    throws StandardException

Bind this grouping column.

Parameters:

fromList - The FROM list to use for binding

subqueryList - The SubqueryList we are building as we hit SubqueryNodes.

aggregateVector - The aggregate vector we build as we hit AggregateNodes.

Throws:

StandardException - Thrown on error

getColumnExpression

public ValueNode getColumnExpression()

setColumnExpression

public void setColumnExpression(ValueNode cexpr)

acceptChildren

void acceptChildren(Visitor v)
              throws StandardException

Accept the visitor for all visitable children of this node.

Overrides:

acceptChildren in class QueryTreeNode

Parameters:

v - the visitor

Throws:

StandardException - on error