Modifier and Type | Field and Description |
---|---|
(package private) static int |
CURRENT_DATE |
(package private) static int |
CURRENT_TIME |
(package private) static int |
CURRENT_TIMESTAMP |
private static int[] |
jdbcTypeId |
private static java.lang.String[] |
methodName |
private int |
whichType |
transformed
AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_CYCLE, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX
Constructor and Description |
---|
CurrentDatetimeOperatorNode(int whichType,
ContextManager cm) |
Modifier and Type | Method and Description |
---|---|
(package private) ValueNode |
bindExpression(FromList fromList,
SubqueryList subqueryList,
java.util.List<AggregateNode> aggregates)
Binding this expression means setting the result DataTypeServices.
|
(package private) void |
generateExpression(ExpressionClassBuilder acb,
MethodBuilder mb)
CurrentDatetimeOperatorNode is used in expressions.
|
protected int |
getOrderableVariantType()
Return the variant type for the underlying expression.
|
(package private) boolean |
isEquivalent(ValueNode o)
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, 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, acceptChildren, 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
static final int CURRENT_DATE
static final int CURRENT_TIME
static final int CURRENT_TIMESTAMP
private static final int[] jdbcTypeId
private static final java.lang.String[] methodName
private int whichType
CurrentDatetimeOperatorNode(int whichType, ContextManager cm)
ValueNode bindExpression(FromList fromList, SubqueryList subqueryList, java.util.List<AggregateNode> aggregates) throws StandardException
bindExpression
in class ValueNode
fromList
- The FROM list for the statement. This parameter
is not used in this case.subqueryList
- The subquery list being built as we find
SubqueryNodes. Not used in this case.aggregates
- The aggregate list being built as we find
AggregateNodes. Not used in this case.StandardException
- Thrown on errorprotected int getOrderableVariantType()
getOrderableVariantType
in class ValueNode
void generateExpression(ExpressionClassBuilder acb, MethodBuilder mb) throws StandardException
generateExpression
in class ValueNode
acb
- The ExpressionClassBuilder for the class being builtmb
- The method the code to place the codeStandardException
- Thrown on errorpublic java.lang.String toString()
ValueNode
boolean isEquivalent(ValueNode o)
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
o
- the node to compare this ValueNode against.true
if the two nodes are equivalent,
false
otherwise.Apache Derby V10.13 Internals - Copyright © 2004,2016 The Apache Software Foundation. All Rights Reserved.