Modifier and Type | Field and Description |
---|---|
private SequenceDescriptor |
sequenceDescriptor |
private TableName |
sequenceName |
transformed
AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_CYCLE, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX
Constructor and Description |
---|
NextSequenceNode(TableName sequenceName,
ContextManager cm)
Constructor for a NextSequenceNode
|
Modifier and Type | Method and Description |
---|---|
(package private) void |
acceptChildren(Visitor v)
Accept a visitor on all child nodes.
|
(package private) ValueNode |
bindExpression(FromList fromList,
SubqueryList subqueryList,
java.util.List<AggregateNode> aggregates,
boolean forQueryRewrite)
Bind this expression.
|
(package private) void |
generateConstant(ExpressionClassBuilder ecb,
MethodBuilder mb)
Dummy implementation to return a constant.
|
(package private) void |
generateExpression(ExpressionClassBuilder acb,
MethodBuilder mb)
Generate code for this calculation.
|
(package private) 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, genIsNullTree, genSQLJavaSQLTree, getClone, getColumnName, getConstantValueAsObject, getDataValueFactory, getOrderableVariantType, getSchemaName, getSourceResultColumn, getTableName, getTablesReferenced, getTransformed, getTypeCompiler, getTypeId, getTypeServices, isBinaryEqualsOperatorNode, isBooleanFalse, isBooleanTrue, isCloneable, isConstantExpression, isInListProbeNode, isParameterNode, isRelationalOperator, isSameNodeKind, optimizableEqualityNode, preprocess, putAndsOnTop, remapColumnReferencesToExpressions, requiresTypeFromContext, selectivity, setCollationInfo, setCollationInfo, setCollationUsingCompilationSchema, setCollationUsingCompilationSchema, setNullability, setTransformed, setType, setType, setType, updatableByCursor, verifyChangeToCNF, verifyEliminateNots, verifyPutAndsOnTop
accept, addTag, addUDTUsagePriv, addUDTUsagePriv, bindOffsetFetch, bindRowMultiSet, bindUserCatalogType, bindUserType, checkReliability, checkReliability, convertDefaultNode, copyTagsFrom, createTypeDependency, debugFlush, debugPrint, disablePrivilegeCollection, formatNodeString, generateAuthorizeCheck, getBeginOffset, getClassFactory, getCompilerContext, getContext, getContextManager, getDataDictionary, getDependencyManager, getEndOffset, getExecutionFactory, getGenericConstantActionFactory, getIntProperty, getLanguageConnectionContext, getLongProperty, getNullNode, getOffsetOrderedNodes, getOptimizerFactory, getOptimizerTracer, getParameterTypes, getSchemaDescriptor, getSchemaDescriptor, getStatementType, getTableDescriptor, getTypeCompiler, getUDTDesc, isAtomic, isPrivilegeCollectionRequired, isSessionSchema, isSessionSchema, makeConstantAction, makeTableName, makeTableName, nodeHeader, optimizerTracingIsOn, orReliability, parseSearchCondition, parseStatement, printLabel, printSubNodes, referencesSessionSchema, resolveTableToSynonym, setBeginOffset, setEndOffset, setRefActionInfo, stackPrint, taggedWith, treePrint, treePrint, verifyClassExist
private TableName sequenceName
private SequenceDescriptor sequenceDescriptor
NextSequenceNode(TableName sequenceName, ContextManager cm)
sequenceName
- The name of the sequence being calledcm
- The context managerValueNode bindExpression(FromList fromList, SubqueryList subqueryList, java.util.List<AggregateNode> aggregates, 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 SubqueryNodesaggregates
- The aggregate list being built as we find AggregateNodesStandardException
- Thrown on errorvoid 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 errorvoid 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()
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
void acceptChildren(Visitor v) throws StandardException
QueryTreeNode
accept(v)
on all visitable fields, as well as
super.acceptChildren(v)
to make sure all visitable fields
defined by the super-class are accepted too.acceptChildren
in class QueryTreeNode
v
- the visitorStandardException
- on errors raised by the visitorApache Derby V10.13 Internals - Copyright © 2004,2016 The Apache Software Foundation. All Rights Reserved.