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.
Fields inherited from class org.apache.derby.impl.sql.compile.BinaryOperatorNode |
AND, CONCATENATE, DIVIDE, EQ, GE, GT, LE, leftInterfaceType, leftOperand, LIKE, LT, methodName, MINUS, NE, operator, OR, PLUS, receiver, rightInterfaceType, rightOperand, TIMES |
Methods inherited from class org.apache.derby.impl.sql.compile.BinaryOperatorNode |
accept, categorize, constantExpression, generateExpression, genSQLJavaSQLTree, getLeftOperand, getOrderableVariantType, getReceiverInterfaceName, getRightOperand, 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, 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, init, isAtomic, isInstanceOf, isSessionSchema, isSessionSchema, makeConstantAction, makeResultDescription, makeTableName, needsSavepoint, nodeHeader, optimize, parseQueryText, printLabel, referencesSessionSchema, 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 |
ConcatenationOperatorNode
public ConcatenationOperatorNode()
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 concatenationrightOperand
- 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 SubqueryNodesaggregateVector
- 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 operandrightType
- 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
Apache Derby V10.0 Engine Documentation - Copyright © 1997,2004 The Apache Software Foundation or its licensors, as applicable.