UnaryDateTimestampOperatorNode (Apache Derby V10.14 Internals)

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
```
class UnaryDateTimestampOperatorNode
extends UnaryOperatorNode
```
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.

Field Summary

Fields
Modifier and Type	Field	Description
`private static java.lang.String`	`DATE_METHOD_NAME`
`(package private) static int`	`K_DATE`
`(package private) static int`	`K_TIMESTAMP`
`(package private) int`	`kind`	This class is used to hold logically different objects for space efficiency.
`private static java.lang.String`	`TIMESTAMP_METHOD_NAME`

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

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

Constructor Summary

Constructors
Constructor Description

UnaryDateTimestampOperatorNode(ValueNode operand, int kind, ContextManager cm)

Constructors
Constructor	Description
`UnaryDateTimestampOperatorNode(ValueNode operand, int kind, ContextManager cm)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`(package private) ValueNode`	`bindExpression(FromList fromList, SubqueryList subqueryList, java.util.List<AggregateNode> aggregates)`	Called by UnaryOperatorNode.bindExpression.
`(package private) void`	`generateExpression(ExpressionClassBuilder acb, MethodBuilder mb)`	Do code generation for this unary operator.
`private void`	`invalidOperandType()`
`(package private) boolean`	`isSameNodeKind(ValueNode o)`	Some node classes represent several logical node types (to reduce footprint), which we call kinds.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from class org.apache.derby.impl.sql.compile.OperatorNode
pushSqlXmlUtil

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

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.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

- Field Detail
  - TIMESTAMP_METHOD_NAME
```
private static final java.lang.String TIMESTAMP_METHOD_NAME
```
    See Also:
    
    Constant Field Values
  - DATE_METHOD_NAME
```
private static final java.lang.String DATE_METHOD_NAME
```
    See Also:
    
    Constant Field Values
  - K_DATE
```
static final int K_DATE
```
    See Also:
    
    Constant Field Values
  - K_TIMESTAMP
```
static final int K_TIMESTAMP
```
    See Also:
    
    Constant Field Values
  - kind
```
final int kind
```
    This class is used to hold logically different objects for space efficiency. kind represents the logical object type. See also ValueNode.isSameNodeKind(org.apache.derby.impl.sql.compile.ValueNode).
- Constructor Detail
  - UnaryDateTimestampOperatorNode
```
UnaryDateTimestampOperatorNode(ValueNode operand,
                               int kind,
                               ContextManager cm)
                        throws StandardException
```
    Parameters:
    
    operand - The operand of the function
    
    kind - The kind of the result, Date or Timestamp.
    
    cm - context manager
    
    Throws:
    
    StandardException
- Method Detail
  - bindExpression
```
ValueNode bindExpression(FromList fromList,
                         SubqueryList subqueryList,
                         java.util.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 class UnaryOperatorNode
    
    Parameters:
    
    fromList - The FROM list for the query this expression is in, for binding columns.
    
    subqueryList - The subquery list being built as we find SubqueryNodes
    
    aggregates - The aggregate list being built as we find AggregateNodes
    
    Returns:
    
    The new top of the expression tree.
    
    Throws:
    
    StandardException - Thrown on error
  - invalidOperandType
```
private void invalidOperandType()
                         throws StandardException
```
    Throws:
    
    StandardException
  - generateExpression
```
void generateExpression(ExpressionClassBuilder acb,
                        MethodBuilder mb)
                 throws StandardException
```
    Do code generation for this unary operator.
    
    Overrides:
    
    generateExpression in class UnaryOperatorNode
    
    Parameters:
    
    acb - The ExpressionClassBuilder for the class we're generating
    
    mb - The method the expression will go into
    
    Throws:
    
    StandardException - Thrown on error
  - isSameNodeKind
```
boolean isSameNodeKind(ValueNode o)
```
    Description copied from class: ValueNode
    
    Some node classes represent several logical node types (to reduce footprint), which we call kinds. This means that implementations of ValueNode.isEquivalent(org.apache.derby.impl.sql.compile.ValueNode) cannot always just use instanceof 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 of isEquivalent.
    
    Overrides:
    
    isSameNodeKind in class UnaryOperatorNode
    
    Parameters:
    
    o - The other value node whose kind we want to compare with.
    
    Returns:
    
    true if this and o represent the same logical node type, i.e. kind.

Class UnaryDateTimestampOperatorNode

Field Summary

Fields inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode

Fields inherited from class org.apache.derby.impl.sql.compile.UnaryOperatorNode

Fields inherited from class org.apache.derby.impl.sql.compile.ValueNode

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from class org.apache.derby.impl.sql.compile.OperatorNode

Methods inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode

Methods inherited from class org.apache.derby.impl.sql.compile.UnaryOperatorNode

Methods inherited from class org.apache.derby.impl.sql.compile.ValueNode

Field Detail

TIMESTAMP_METHOD_NAME

DATE_METHOD_NAME

K_DATE

K_TIMESTAMP

kind

Constructor Detail

UnaryDateTimestampOperatorNode

Method Detail

bindExpression

invalidOperandType

generateExpression

isSameNodeKind