Modifier and Type | Field | Description |
---|---|---|
private java.lang.String |
columnName |
|
private java.lang.String |
defaultText |
|
private ValueNode |
defaultTree |
AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_CYCLE, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX
transformed
Constructor | Description |
---|---|
DefaultNode(java.lang.String columnName,
ContextManager cm) |
Constructor for insert/update
|
DefaultNode(ContextManager cm) |
Constructor for a generated by default as identity column.
|
DefaultNode(ValueNode defaultTree,
java.lang.String defaultText,
ContextManager cm) |
Constructor for a column/parameter default.
|
Modifier and Type | Method | Description |
---|---|---|
(package private) ValueNode |
bindExpression(FromList fromList,
SubqueryList subqueryList,
java.util.List<AggregateNode> aggregates) |
Bind this expression.
|
(package private) void |
generateExpression(ExpressionClassBuilder acb,
MethodBuilder mb) |
Generate code for this calculation.
|
java.lang.String |
getDefaultText() |
Get the text of the default.
|
(package private) ValueNode |
getDefaultTree() |
Get the query tree for the default.
|
(package private) boolean |
isEquivalent(ValueNode other) |
Tests if this node is equivalent to the specified ValueNode.
|
static ValueNode |
parseDefault(java.lang.String defaultText,
LanguageConnectionContext lcc,
CompilerContext cc) |
Parse a default and turn it into a query tree.
|
(package private) void |
printSubNodes(int depth) |
Prints the sub-nodes of this object.
|
java.lang.String |
toString() |
Convert this object to a String.
|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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, referencesSessionSchema, resolveTableToSynonym, setBeginOffset, setEndOffset, setRefActionInfo, stackPrint, taggedWith, treePrint, treePrint, verifyClassExist
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
private java.lang.String columnName
private java.lang.String defaultText
private ValueNode defaultTree
DefaultNode(ContextManager cm)
cm
- The context managerDefaultNode(ValueNode defaultTree, java.lang.String defaultText, ContextManager cm)
defaultTree
- Query tree for defaultdefaultText
- The text of the default.cm
- The context managerDefaultNode(java.lang.String columnName, ContextManager cm)
columnName
- The column name for which a default is to be appliedpublic java.lang.String getDefaultText()
ValueNode getDefaultTree()
public java.lang.String toString()
void printSubNodes(int depth)
printSubNodes
in class QueryTreeNode
depth
- The depth of this node in the treeValueNode bindExpression(FromList fromList, SubqueryList subqueryList, java.util.List<AggregateNode> aggregates) 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 failurepublic static ValueNode parseDefault(java.lang.String defaultText, LanguageConnectionContext lcc, CompilerContext cc) throws StandardException
defaultText
- Text of Default.lcc
- LanguageConnectionContextcc
- CompilerContextStandardException
- Thrown on failurevoid 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 failureboolean isEquivalent(ValueNode other)
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.Apache Derby V10.14 Internals - Copyright © 2004,2018 The Apache Software Foundation. All Rights Reserved.