org.apache.derby.impl.sql.compile

Class BinaryLogicalOperatorNode

java.lang.Object

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

org.apache.derby.impl.sql.compile.ValueNode

org.apache.derby.impl.sql.compile.OperatorNode

org.apache.derby.impl.sql.compile.BinaryOperatorNode

org.apache.derby.impl.sql.compile.BinaryLogicalOperatorNode

All Implemented Interfaces:

Node, Visitable

Direct Known Subclasses:

AndNode, IsNode, OrNode

abstract class BinaryLogicalOperatorNode
extends BinaryOperatorNode

Field Summary

Fields

Modifier and Type	Field and Description
(package private) boolean	shortCircuitValue

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, XMLQUERY_OP

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

transformed

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
BinaryLogicalOperatorNode()

Method Summary

Methods

Modifier and Type	Method and Description
ValueNode	bindExpression(FromList fromList, SubqueryList subqueryList, java.util.List aggregateVector) Bind this logical operator.
void	generateExpression(ExpressionClassBuilder acb, MethodBuilder mb) Do code generation for this logical binary operator.
void	init(java.lang.Object leftOperand, java.lang.Object rightOperand, java.lang.Object methodName) Initializer for a BinaryLogicalOperatorNode
(package private) DataTypeDescriptor	resolveLogicalBinaryOperator(DataTypeDescriptor leftType, DataTypeDescriptor rightType)
(package private) boolean	verifyEliminateNots() Verify that eliminateNots() did its job correctly.

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

acceptChildren, bindXMLQuery, categorize, constantExpression, genSQLJavaSQLTree, getLeftOperand, getOrderableVariantType, getReceiverInterfaceName, getRightOperand, init, init, isConstantExpression, isEquivalent, preprocess, printSubNodes, remapColumnReferencesToExpressions, setLeftOperand, setLeftRightInterfaceType, setMethodName, setOperator, setRightOperand, toString

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

pushSqlXmlUtil

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

bindExpression, changeToCNF, checkIsBoolean, checkTopPredicatesForEqualsConditions, copyFields, eliminateNots, evaluateConstantExpressions, genEqualsFalseTree, generate, generateFilter, genIsNullTree, getClone, getColumnName, getConstantValueAsObject, getDataValueFactory, getSchemaName, getSourceResultColumn, getTableName, getTablesReferenced, getTransformed, getTypeCompiler, getTypeId, getTypeServices, init, isBinaryEqualsOperatorNode, isBooleanFalse, isBooleanTrue, isCloneable, isInListProbeNode, isParameterNode, isRelationalOperator, isSameNodeType, optimizableEqualityNode, putAndsOnTop, requiresTypeFromContext, selectivity, setCollationInfo, setCollationInfo, setCollationUsingCompilationSchema, setCollationUsingCompilationSchema, setNullability, setTransformed, setType, setType, setType, updatableByCursor, verifyChangeToCNF, verifyPutAndsOnTop

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, 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, 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

shortCircuitValue

boolean shortCircuitValue

Constructor Detail

BinaryLogicalOperatorNode

BinaryLogicalOperatorNode()

Method Detail

init

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

Initializer for a BinaryLogicalOperatorNode

Specified by:

init in interface Node

Overrides:

init in class BinaryOperatorNode

Parameters:

leftOperand - The left operand of the comparison

rightOperand - The right operand of the comparison

methodName - The name of the method to call in the generated class. In this case, it's actually an operator name.

bindExpression

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

Bind this logical operator. All that has to be done for binding a logical operator is to bind the operands, check that both operands are BooleanDataValue, and set the result type to BooleanDataValue.

Overrides:

bindExpression in class BinaryOperatorNode

Parameters:

fromList - The query's FROM list

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 error

verifyEliminateNots

boolean verifyEliminateNots()

Verify that eliminateNots() did its job correctly. Verify that there are no NotNodes above the top level comparison operators and boolean expressions.

Overrides:

verifyEliminateNots in class ValueNode

Returns:

Boolean which reflects validity of the tree.

generateExpression

public void generateExpression(ExpressionClassBuilder acb,
                      MethodBuilder mb)
                        throws StandardException

Do code generation for this logical binary operator. This is used for AND and OR. the IsNode extends this class but overrides generateExpression.

Overrides:

generateExpression in class BinaryOperatorNode

Parameters:

acb - The ExpressionClassBuilder for the class we're generating

mb - The method the code to place the code

Throws:

StandardException - Thrown on error

resolveLogicalBinaryOperator

DataTypeDescriptor resolveLogicalBinaryOperator(DataTypeDescriptor leftType,
                                              DataTypeDescriptor rightType)
                                          throws StandardException

Throws:

StandardException