Modifier and Type | Field and Description |
---|---|
private SequenceDescriptor |
sequenceDescriptor |
private TableName |
sequenceName |
transformed
AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX
Constructor and Description |
---|
NextSequenceNode() |
Modifier and Type | Method and Description |
---|---|
ValueNode |
bindExpression(FromList fromList,
SubqueryList subqueryList,
java.util.List aggregateVector,
boolean forQueryRewrite)
Bind this expression.
|
void |
generateConstant(ExpressionClassBuilder ecb,
MethodBuilder mb)
Dummy implementation to return a constant.
|
void |
generateExpression(ExpressionClassBuilder acb,
MethodBuilder mb)
Generate code for this calculation.
|
void |
init(java.lang.Object sequenceName)
Initializer for a NextSequenceNode
|
protected boolean |
isEquivalent(ValueNode other)
Tests if this node is equivalent to the specified ValueNode.
|
java.lang.String |
toString()
Convert this object to a String.
|
bindExpression, categorize, changeToCNF, checkIsBoolean, checkTopPredicatesForEqualsConditions, constantExpression, copyFields, eliminateNots, evaluateConstantExpressions, genEqualsFalseTree, generate, generateFilter, genIsNullTree, genSQLJavaSQLTree, getClone, getColumnName, getConstantValueAsObject, getDataValueFactory, getOrderableVariantType, getSchemaName, getSourceResultColumn, getTableName, getTablesReferenced, getTransformed, getTypeCompiler, getTypeId, getTypeServices, init, isBinaryEqualsOperatorNode, isBooleanFalse, isBooleanTrue, isCloneable, isConstantExpression, isInListProbeNode, isParameterNode, isRelationalOperator, isSameNodeType, optimizableEqualityNode, preprocess, putAndsOnTop, remapColumnReferencesToExpressions, requiresTypeFromContext, selectivity, setCollationInfo, setCollationInfo, setCollationUsingCompilationSchema, setCollationUsingCompilationSchema, setNullability, setTransformed, setType, setType, setType, updatableByCursor, verifyChangeToCNF, verifyEliminateNots, verifyPutAndsOnTop
accept, acceptChildren, 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, init, init, isAtomic, isInstanceOf, isPrivilegeCollectionRequired, isSessionSchema, isSessionSchema, makeConstantAction, makeTableName, makeTableName, nodeHeader, orReliability, parseStatement, printLabel, printSubNodes, referencesSessionSchema, resolveTableToSynonym, setBeginOffset, setContextManager, setEndOffset, setNodeType, setRefActionInfo, stackPrint, treePrint, treePrint, verifyClassExist
private TableName sequenceName
private SequenceDescriptor sequenceDescriptor
public void init(java.lang.Object sequenceName) throws StandardException
init
in interface Node
init
in class QueryTreeNode
sequenceName
- The name of the sequence being calledStandardException
- Thrown on errorpublic ValueNode bindExpression(FromList fromList, SubqueryList subqueryList, java.util.List aggregateVector, boolean forQueryRewrite) throws StandardException
bindExpression
in class ValueNode
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 AggregateNodesStandardException
- Thrown on errorpublic void generateExpression(ExpressionClassBuilder acb, MethodBuilder mb) throws StandardException
ValueNode
generateExpression
in class ValueNode
acb
- The ExpressionClassBuilder for the class being builtmb
- The method the expression will go intoStandardException
- Thrown on errorpublic void generateConstant(ExpressionClassBuilder ecb, MethodBuilder mb) throws StandardException
ecb
- The ExpressionClassBuilder for the class being builtmb
- The method the expression will go intoStandardException
- on errorpublic java.lang.String toString()
protected boolean isEquivalent(ValueNode other) throws StandardException
ValueNode
This method provides basic expression matching facility for the derived class of ValueNode and it is used by the language layer to compare the node structural form of the two expressions for equivalence at bind phase.
Note that it is not comparing the actual row values at runtime to produce a result; hence, when comparing SQL NULLs, they are considered to be equivalent and not unknown.
One usage case of this method in this context is to compare the select column expression against the group by expression to check if they are equivalent. e.g.:
SELECT c1+c2 FROM t1 GROUP BY c1+c2
In general, node equivalence is determined by the derived class of ValueNode. But they generally abide to the rules below:
isEquivalent
in class ValueNode
other
- the node to compare this ValueNode against.true
if the two nodes are equivalent,
false
otherwise.StandardException
Apache Derby V10.10 Internals - Copyright © 2004,2014 The Apache Software Foundation. All Rights Reserved.