org.apache.derby.impl.sql.compile
Class ConcatenationOperatorNode

java.lang.Object
  org.apache.derby.impl.sql.compile.QueryTreeNode
      org.apache.derby.impl.sql.compile.ValueNode
          org.apache.derby.impl.sql.compile.BinaryOperatorNode
              org.apache.derby.impl.sql.compile.ConcatenationOperatorNode

All Implemented Interfaces:

Visitable

public class ConcatenationOperatorNode

extends BinaryOperatorNode

This node represents a concatenation comparison operator

Author:

Jerry Brenner -- modified by jamie for bit and bit varying.

Field Summary

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

AND, BinaryArgTypes, BinaryMethodNames, BinaryOperators, BinaryResultTypes, CONCATENATE, DIVIDE, EQ, GE, GT, LE, leftInterfaceType, leftOperand, LIKE, LT, methodName, MINUS, NE, operator, operatorType, OR, PLUS, receiver, resultInterfaceType, rightInterfaceType, rightOperand, TIMES, XMLEXISTS_OP

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

clause, dataTypeServices, IN_HAVING_CLAUSE, IN_SELECT_LIST, IN_UNKNOWN_CLAUSE, IN_WHERE_CLAUSE, transformed

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

AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX, beginOffset, endOffset

Constructor Summary

ConcatenationOperatorNode()

Method Summary

ValueNode	bindExpression(FromList fromList, SubqueryList subqueryList, java.util.Vector aggregateVector) overrides BindOperatorNode.bindExpression because concatenation has special requirements for parameter binding.
private static int	clobBlobHandling(DataTypeDescriptor clobBlobType, DataTypeDescriptor otherType)
void	init(java.lang.Object leftOperand, java.lang.Object rightOperand) Initializer for a ConcatenationOperatorNode
protected void	initializeResultField(ExpressionClassBuilder acb, MethodBuilder mb, LocalField resultField)
private DataTypeDescriptor	resolveConcatOperation(DataTypeDescriptor leftType, DataTypeDescriptor rightType) Resolve a concatenation operator

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

accept, bindXMLExists, categorize, constantExpression, generateExpression, genSQLJavaSQLTree, getLeftOperand, getOrderableVariantType, getReceiverInterfaceName, getRightOperand, init, init, init, isConstantExpression, preprocess, printSubNodes, remapColumnReferencesToExpressions, setClause, setLeftOperand, setLeftRightInterfaceType, setMethodName, setOperator, setRightOperand, swapOperands, toString

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

bindExpression, changeToCNF, checkIsBoolean, checkReliability, checkReliability, checkTopPredicatesForEqualsConditions, copyFields, eliminateNots, genEqualsFalseTree, generate, generateFilter, genIsNullTree, getClause, getClone, getColumnName, getConstantValueAsObject, getDataValueFactory, getSchemaName, getSourceResultColumn, getTableName, getTablesReferenced, getTransformed, getTypeCompiler, getTypeId, getTypeServices, init, isBinaryEqualsOperatorNode, isBooleanFalse, isBooleanTrue, isCloneable, isParameterNode, isRelationalOperator, optimizableEqualityNode, putAndsOnTop, selectivity, setDescriptor, setTransformed, setType, updatableByCursor, verifyChangeToCNF, verifyEliminateNots, verifyPutAndsOnTop

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

bind, convertDefaultNode, debugFlush, debugPrint, executeSchemaName, executeStatementName, formatNodeString, foundString, generate, generateAuthorizeCheck, getBeginOffset, getClassFactory, getCompilerContext, getContextManager, getCursorInfo, getDataDictionary, getDependencyManager, getEndOffset, getExecutionFactory, getGenericConstantActionFactory, getIntProperty, getLanguageConnectionContext, getNodeFactory, getNodeType, getNullNode, getParameterTypes, getRowEstimate, getSchemaDescriptor, getSchemaDescriptor, getSPSName, getStatementType, getTableDescriptor, getTypeCompiler, init, init, init, init, init, init, init, init, init, isAtomic, isInstanceOf, isSessionSchema, isSessionSchema, makeConstantAction, makeResultDescription, makeTableName, needsSavepoint, nodeHeader, optimize, parseQueryText, printLabel, referencesSessionSchema, resolveTableToSynonym, setBeginOffset, setContextManager, setEndOffset, setNodeType, setRefActionInfo, treePrint, treePrint, verifyClassExist

Methods inherited from class java.lang.Object

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

Constructor Detail

ConcatenationOperatorNode

public ConcatenationOperatorNode()

Method Detail

init

public void init(java.lang.Object leftOperand,
                 java.lang.Object rightOperand)

Initializer for a ConcatenationOperatorNode

Overrides:

init in class QueryTreeNode

Parameters:

leftOperand - The left operand of the concatenation

rightOperand - The right operand of the concatenation

bindExpression

public ValueNode bindExpression(FromList fromList,
                                SubqueryList subqueryList,
                                java.util.Vector aggregateVector)
                         throws StandardException

overrides BindOperatorNode.bindExpression because concatenation has special requirements for parameter binding.

Overrides:

bindExpression in class BinaryOperatorNode

Parameters:

fromList - The FROM list for the query this expression is in, for binding columns.

subqueryList - The subquery list being built as we find SubqueryNodes

aggregateVector - The aggregate vector being built as we find AggregateNodes

Returns:

The new top of the expression tree.

Throws:

StandardException - thrown on failure

resolveConcatOperation

private DataTypeDescriptor resolveConcatOperation(DataTypeDescriptor leftType,
                                                  DataTypeDescriptor rightType)
                                           throws StandardException

Resolve a concatenation operator

Parameters:

leftType - The DataTypeDescriptor of the left operand

rightType - The DataTypeDescriptor of the right operand

Returns:

A DataTypeDescriptor telling the result type of the concatenate operation

Throws:

StandardException - BinaryOperatorNotSupported Thrown when a BinaryOperator is not supported on the operand types.

initializeResultField

protected void initializeResultField(ExpressionClassBuilder acb,
                                     MethodBuilder mb,
                                     LocalField resultField)

Overrides:

initializeResultField in class BinaryOperatorNode

clobBlobHandling

private static int clobBlobHandling(DataTypeDescriptor clobBlobType,
                                    DataTypeDescriptor otherType)
                             throws StandardException

Throws:

StandardException