Class UnaryDateTimestampOperatorNode
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.UnaryOperatorNode
org.apache.derby.impl.sql.compile.UnaryDateTimestampOperatorNode
- All Implemented Interfaces:
Visitable
This class implements the timestamp( x) and date(x) functions.
These two functions implement a few special cases of string conversions beyond the normal string to
date/timestamp casts.
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate static final String
(package private) static final int
(package private) static final int
(package private) final int
This class is used to hold logically different objects for space efficiency.private static final String
Fields inherited from class org.apache.derby.impl.sql.compile.UnaryOperatorNode
K_BASE, K_XMLPARSE, K_XMLSERIALIZE, methodName, operand, operator, receiverInterfaceType, resultInterfaceType, UnaryArgTypes, UnaryMethodNames, UnaryOperators, UnaryResultTypes
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_CYCLE, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX
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Constructor Summary
ConstructorsConstructorDescriptionUnaryDateTimestampOperatorNode
(ValueNode operand, int kind, ContextManager cm) -
Method Summary
Modifier and TypeMethodDescription(package private) ValueNode
bindExpression
(FromList fromList, SubqueryList subqueryList, List<AggregateNode> aggregates) Called by UnaryOperatorNode.bindExpression.(package private) void
Do code generation for this unary operator.private void
(package private) boolean
Some node classes represent several logical node types (to reduce footprint), which we call kinds.Methods inherited from class org.apache.derby.impl.sql.compile.UnaryOperatorNode
acceptChildren, addXmlOpMethodParams, bindOperand, bindParameter, categorize, constantExpression, getOperand, getOperatorString, getOrderableVariantType, getParameterOperand, getReceiverInterfaceName, isConstantExpression, isEquivalent, preprocess, printSubNodes, remapColumnReferencesToExpressions, setMethodName, setOperator, 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, genIsNullTree, genSQLJavaSQLTree, getClone, getColumnName, getConstantValueAsObject, getDataValueFactory, getSchemaName, getSourceResultColumn, getTableName, getTablesReferenced, getTransformed, getTypeCompiler, getTypeId, getTypeServices, isBinaryEqualsOperatorNode, isBooleanFalse, isBooleanTrue, isCloneable, isInListProbeNode, isParameterNode, isRelationalOperator, optimizableEqualityNode, putAndsOnTop, requiresTypeFromContext, selectivity, setCollationInfo, setCollationInfo, setCollationUsingCompilationSchema, setCollationUsingCompilationSchema, setNullability, setTransformed, setType, setType, setType, updatableByCursor, verifyChangeToCNF, verifyEliminateNots, verifyPutAndsOnTop
Methods inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode
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, referencesSessionSchema, resolveTableToSynonym, setBeginOffset, setEndOffset, setRefActionInfo, stackPrint, taggedWith, treePrint, treePrint, verifyClassExist
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Field Details
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TIMESTAMP_METHOD_NAME
- See Also:
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DATE_METHOD_NAME
- See Also:
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K_DATE
static final int K_DATE- See Also:
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K_TIMESTAMP
static final int K_TIMESTAMP- See Also:
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kind
final int kindThis class is used to hold logically different objects for space efficiency.kind
represents the logical object type. See alsoValueNode.isSameNodeKind(org.apache.derby.impl.sql.compile.ValueNode)
.
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Constructor Details
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UnaryDateTimestampOperatorNode
UnaryDateTimestampOperatorNode(ValueNode operand, int kind, ContextManager cm) throws StandardException - Parameters:
operand
- The operand of the functionkind
- The kind of the result, Date or Timestamp.cm
- context manager- Throws:
StandardException
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Method Details
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bindExpression
ValueNode bindExpression(FromList fromList, SubqueryList subqueryList, List<AggregateNode> aggregates) throws StandardException Called by UnaryOperatorNode.bindExpression. If the operand is a constant then evaluate the function at compile time. Otherwise, if the operand input type is the same as the output type then discard this node altogether. If the function is "date" and the input is a timestamp then change this node to a cast.- Overrides:
bindExpression
in classUnaryOperatorNode
- Parameters:
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 AggregateNodes- Returns:
- The new top of the expression tree.
- Throws:
StandardException
- Thrown on error
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invalidOperandType
- Throws:
StandardException
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generateExpression
Do code generation for this unary operator.- Overrides:
generateExpression
in classUnaryOperatorNode
- Parameters:
acb
- The ExpressionClassBuilder for the class we're generatingmb
- The method the expression will go into- Throws:
StandardException
- Thrown on error
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isSameNodeKind
Description copied from class:ValueNode
Some node classes represent several logical node types (to reduce footprint), which we call kinds. This means that implementations ofValueNode.isEquivalent(org.apache.derby.impl.sql.compile.ValueNode)
cannot always just useinstanceof
to check if the other node represents the same kind. Hence this method needs to be overridden by all node classes that represent several kinds. This default implementation does not look at kinds. It is only called from implementations ofisEquivalent
.- Overrides:
isSameNodeKind
in classUnaryOperatorNode
- Parameters:
o
- The other value node whose kind we want to compare with.- Returns:
true
ifthis
ando
represent the same logical node type, i.e. kind.
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