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oracle.jbo.common
Class JboCompOper

java.lang.Object
oracle.jbo.common.JboCompOper

All Implemented Interfaces:

java.io.Serializable, DefPersistable, PersistentDefinition

public class JboCompOper

extends java.lang.Object

implements DefPersistable, java.io.Serializable

See Also:

Serialized Form

Field Summary

static java.lang.String	OPER_AFTER
static java.lang.String	OPER_BEFORE
static java.lang.String	OPER_BETWEEN
static int	OPER_CARDINALITY_NO_MAX
static java.lang.String	OPER_CONTAINS
static java.lang.String	OPER_DOES_NOT_CONTAIN
static java.lang.String	OPER_ENDS_WITH
static java.lang.String	OPER_EQ
static java.lang.String	OPER_EXISTS
static java.lang.String	OPER_GE
static java.lang.String	OPER_GT
static java.lang.String	OPER_IN
static java.lang.String	OPER_IS_BLANK
static java.lang.String	OPER_IS_NOT_BLANK
static java.lang.String	OPER_LE
static java.lang.String	OPER_LIKE
static java.lang.String	OPER_LT
static java.lang.String	OPER_NE
static java.lang.String	OPER_NOT_BETWEEN
static java.lang.String	OPER_NOTIN
static java.lang.String	OPER_ON_OR_AFTER
static java.lang.String	OPER_ON_OR_BEFORE
static java.lang.String	OPER_STARTS_WITH
static int	OPER_TODO_ADD
static int	OPER_TODO_CLEAR
static int	OPER_TODO_REMOVE

Fields inherited from interface oracle.jbo.mom.xml.DefPersistable

XML_STATEMENT

Constructor Summary

JboCompOper()

JboCompOper(int toDo, java.lang.Class msgBundleClass, java.lang.String strCode, java.lang.String oper)
Creates an instance of a comparison operator used in view criteria

JboCompOper(int toDo, java.lang.Class msgBundleClass, java.lang.String strCode, java.lang.String oper, int minCardinality, int maxCardinality, java.lang.String expression)
Creates an instance of a comparison operator used in view criteria

JboCompOper(int toDo, java.lang.String operDesc, java.lang.String oper, int minCardinality, int maxCardinality, java.lang.String expression)
Creates an instance of a comparison operator used in view criteria

JboCompOper(int toDo, java.lang.String msgBundleClassName, java.lang.String strCode, java.lang.String oper, int minCardinality, int maxCardinality, java.lang.String expression)
Creates an instance of a comparison operator used in view criteria

JboCompOper(java.lang.String id, int toDo, java.lang.Class msgBundleClass, java.lang.String strCode, java.lang.String oper, int minCardinality, int maxCardinality, java.lang.String expression)
Creates an instance of a comparison operator used in view criteria.

JboCompOper(java.lang.String id, int toDo, java.lang.String operDesc, java.lang.String oper, int minCardinality, int maxCardinality, java.lang.String expression)
Creates an instance of a comparison operator used in view criteria.

JboCompOper(java.lang.String id, int toDo, java.lang.String msgBundleClassName, java.lang.String strCode, java.lang.String oper, int minCardinality, int maxCardinality, java.lang.String expression)
Creates an instance of a comparison operator used in view criteria.

Method Summary

static void	addCompOper(int typeGroup, java.lang.Class msgBundleClass, java.lang.String strCode, java.lang.String oper, int minCardinality, int maxCardinality) For internal use only to load framework operators for a particular type.
static void	addCompOper(int typeGroup, java.lang.String operDesc, java.lang.String oper, int minCardinality, int maxCardinality) For internal use only to load framework operators for a particular type.
static void	addCompOperEntry(int typeGroup, int toDo, java.lang.Class msgBundleClass, java.lang.String strCode, java.lang.String oper, int minCardinality, int maxCardinality) For internal use only to load framework operators for a particular type.
static void	addCompOperEntry(int typeGroup, int toDo, java.lang.String operDesc, java.lang.String oper, int minCardinality, int maxCardinality) For internal use only to load framework operators for a particular type.
java.lang.Object	clone()
boolean	equals(java.lang.Object other)
static java.util.HashMap	getAllBaseCompOpers(LocaleContext locale) For internal use only.
static java.lang.String[][]	getBaseCompOpers(LocaleContext locale) For internal use only.
static void	getCompOperList(int typeGroup, java.util.ArrayList list) The list of operators for a specific type.
java.lang.String	getDefXMLElementTag() For internal use only
java.lang.String	getDefXMLNameSpace() For internal use only
java.lang.String	getExpression()
java.lang.String	getFullName() This method returns the Persistence reference of the object.
int	getMaxCardinality()
java.lang.Class	getMessageBundleClass()
int	getMinCardinality()
java.lang.String	getOper()
java.lang.String	getOperDesc()
java.lang.String	getOperDescStr(LocaleContext locale)
java.lang.String	getOperDescStrCode()
DefPersistable	getOrigObject()
int	getToDo()
java.lang.String	getXMLElementTag() For internal use only
boolean	isDirty() This method returns if an Object is modified from last save/load
boolean	isNew() This method returns if this object is previously persisted.
boolean	isRelationalOperator() If a view criteria item has a value set, temporary bind variables are generated for the values to use statement caching efficiently.
void	loadXMLContent(DefElement xmlElement)
static void	mergeEntries(java.util.ArrayList opers, java.util.ArrayList list) For internal use only.
static void	mergeEntry(java.util.ArrayList list, int toDo, java.lang.Object ent) For internal use only.
static void	populateCompOpers()
static java.lang.String[][]	processCompOpers(LocaleContext locale, java.util.ArrayList list)
void	setDirty(boolean isDirty) This method marks the Object dirty
void	setMessageBundleClass(java.lang.Class cls)
void	setNew(boolean b) This method marks the as previously persisted.
void	setOrigObject(DefPersistable oldObj)
void	setResourceBundleDef(ResourceBundleDef def)
void	writeChildren(DefWriter jos) Writes the Object's children to the Persistent storage
void	writeContents(DefWriter jos) Objects should write their persistence output in this method
void	writeContents(DefWriter jos, boolean bWriteId)
void	writeObject(DefWriter jos) Objects should write their persistence output in this method

Methods inherited from class java.lang.Object

finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

OPER_EQ

public static final java.lang.String OPER_EQ

See Also:

Constant Field Values

OPER_GT

public static final java.lang.String OPER_GT

See Also:

Constant Field Values

OPER_GE

public static final java.lang.String OPER_GE

See Also:

Constant Field Values

OPER_LT

public static final java.lang.String OPER_LT

See Also:

Constant Field Values

OPER_LE

public static final java.lang.String OPER_LE

See Also:

Constant Field Values

OPER_NE

public static final java.lang.String OPER_NE

See Also:

Constant Field Values

OPER_LIKE

public static final java.lang.String OPER_LIKE

See Also:

Constant Field Values

OPER_CONTAINS

public static final java.lang.String OPER_CONTAINS

See Also:

Constant Field Values

OPER_DOES_NOT_CONTAIN

public static final java.lang.String OPER_DOES_NOT_CONTAIN

See Also:

Constant Field Values

OPER_STARTS_WITH

public static final java.lang.String OPER_STARTS_WITH

See Also:

Constant Field Values

OPER_ENDS_WITH

public static final java.lang.String OPER_ENDS_WITH

See Also:

Constant Field Values

OPER_IS_BLANK

public static final java.lang.String OPER_IS_BLANK

See Also:

Constant Field Values

OPER_IS_NOT_BLANK

public static final java.lang.String OPER_IS_NOT_BLANK

See Also:

Constant Field Values

OPER_BETWEEN

public static final java.lang.String OPER_BETWEEN

See Also:

Constant Field Values

OPER_NOT_BETWEEN

public static final java.lang.String OPER_NOT_BETWEEN

See Also:

Constant Field Values

OPER_BEFORE

public static final java.lang.String OPER_BEFORE

See Also:

Constant Field Values

OPER_AFTER

public static final java.lang.String OPER_AFTER

See Also:

Constant Field Values

OPER_ON_OR_BEFORE

public static final java.lang.String OPER_ON_OR_BEFORE

See Also:

Constant Field Values

OPER_ON_OR_AFTER

public static final java.lang.String OPER_ON_OR_AFTER

See Also:

Constant Field Values

OPER_EXISTS

public static final java.lang.String OPER_EXISTS

See Also:

Constant Field Values

OPER_IN

public static final java.lang.String OPER_IN

See Also:

Constant Field Values

OPER_NOTIN

public static final java.lang.String OPER_NOTIN

See Also:

Constant Field Values

OPER_TODO_ADD

public static final int OPER_TODO_ADD

See Also:

Constant Field Values

OPER_TODO_REMOVE

public static final int OPER_TODO_REMOVE

See Also:

Constant Field Values

OPER_TODO_CLEAR

public static final int OPER_TODO_CLEAR

See Also:

Constant Field Values

OPER_CARDINALITY_NO_MAX

public static final int OPER_CARDINALITY_NO_MAX

See Also:

Constant Field Values

Constructor Detail

JboCompOper

public JboCompOper()

JboCompOper

public JboCompOper(int toDo,
                   java.lang.Class msgBundleClass,
                   java.lang.String strCode,
                   java.lang.String oper)

Creates an instance of a comparison operator used in view criteria

Parameters:

toDo - use OPER_TODO_ADD, OPER_TODO_REMOVE and OPER_TODO_CLEAR to add, remove or remove all operators defined on the owner.

msgBundleClass - the message bundle that holds the description of the operator displayed in the search form

strCode - the key used to lookup the message bundle

oper - the operator string saved in the view criteria item xml. For example oper could be ">" msgbundleClass could be "OperatorsBundle" and strCode could be "GREATER_THAN". The bundle may contain the value "Greater than" for key "GREATER_THAN".

JboCompOper

public JboCompOper(int toDo,
                   java.lang.Class msgBundleClass,
                   java.lang.String strCode,
                   java.lang.String oper,
                   int minCardinality,
                   int maxCardinality,
                   java.lang.String expression)

Creates an instance of a comparison operator used in view criteria

Parameters:

toDo - use OPER_TODO_ADD, OPER_TODO_REMOVE and OPER_TODO_CLEAR to add, remove or remove all operators defined on the owner

msgBundleClass - the message bundle that holds the description of the operator displayed in the search form

strCode - the key used to lookup the message bundle

oper - the operator string saved in the view criteria item xml. For example oper could be ">" msgbundleClass could be "OperatorsBundle" and strCode could be "GREATER_THAN". The bundle may contain the value "Greater than" for key "GREATER_THAN".

minCardinality - the minimum cardinality of the operator. for example "greater than" has a minimum cardinality of 1 and "is not null" operator has a minimum cardinality of 0.

maxCardinality - the maximum cardinality of the operator. for example "greater than" has a maximum cardinality of 1 and "between" has a maximum cardinality of 2.

expression - a groovy expression that returns a where clause fragment. The expression is passed a reference to a ViewCriteriaItem and can introspect into the values of the item by calling public methods on it.

JboCompOper

public JboCompOper(java.lang.String id,
                   int toDo,
                   java.lang.Class msgBundleClass,
                   java.lang.String strCode,
                   java.lang.String oper,
                   int minCardinality,
                   int maxCardinality,
                   java.lang.String expression)

Creates an instance of a comparison operator used in view criteria. Use this constructor if this operator will be written out to xml for DT@RT usages.

Parameters:

id - The string used to identify a comp operator occurence uniquely under an owner. Theoretically a user can remove a system provided operator and implement an overridden version. For example TODO_REMOVE, > and TODO_ADD, >, custom expression. The same operator is repeated twice and hence the need to introduce a unique attribute to identify an element.

toDo - use OPER_TODO_ADD, OPER_TODO_REMOVE and OPER_TODO_CLEAR to add, remove or remove all operators defined on the owner

msgBundleClass - the message bundle that holds the description of the operator displayed in the search form

strCode - the key used to lookup the message bundle

oper - the operator string saved in the view criteria item xml. For example oper could be ">" msgbundleClass could be "OperatorsBundle" and strCode could be "GREATER_THAN". The bundle may contain the value "Greater than" for key "GREATER_THAN".

minCardinality - the minimum cardinality of the operator. for example "greater than" has a minimum cardinality of 1 and "is not null" operator has a minimum cardinality of 0.

maxCardinality - the maximum cardinality of the operator. for example "greater than" has a maximum cardinality of 1 and "between" has a maximum cardinality of 2.

expression - a groovy expression that returns a where clause fragment. The expression is passed a reference to a ViewCriteriaItem and can introspect into the values of the item by calling public methods on it.

JboCompOper

public JboCompOper(int toDo,
                   java.lang.String msgBundleClassName,
                   java.lang.String strCode,
                   java.lang.String oper,
                   int minCardinality,
                   int maxCardinality,
                   java.lang.String expression)

Creates an instance of a comparison operator used in view criteria

Parameters:

toDo - use OPER_TODO_ADD, OPER_TODO_REMOVE and OPER_TODO_CLEAR to add, remove or remove all operators defined on the owner

msgBundleClassName - the message bundle name that holds the description of the operator displayed in the search form

strCode - the key used to lookup the message bundle

oper - the operator string saved in the view criteria item xml. For example oper could be ">" msgbundleClass could be "OperatorsBundle" and strCode could be "GREATER_THAN". The bundle may contain the value "Greater than" for key "GREATER_THAN".

minCardinality - the minimum cardinality of the operator. for example "greater than" has a minimum cardinality of 1 and "is not null" operator has a minimum cardinality of 0.

maxCardinality - the maximum cardinality of the operator. for example "greater than" has a maximum cardinality of 1 and "between" has a maximum cardinality of 2.

expression - a groovy expression that returns a where clause fragment. The expression is passed a reference to a ViewCriteriaItem and can introspect into the values of the item by calling public methods on it.

JboCompOper

public JboCompOper(java.lang.String id,
                   int toDo,
                   java.lang.String msgBundleClassName,
                   java.lang.String strCode,
                   java.lang.String oper,
                   int minCardinality,
                   int maxCardinality,
                   java.lang.String expression)

Creates an instance of a comparison operator used in view criteria. Use this constructor if this operator will be written out to xml for DT@RT usages.

Parameters:

id - The string used to identify a comp operator occurence uniquely under an owner. Theoretically a user can remove a system provided operator and implement an overridden version. For example TODO_REMOVE, > and TODO_ADD, >, custom expression. The same operator is repeated twice and hence the need to introduce a unique attribute to identify an element.

toDo - use OPER_TODO_ADD, OPER_TODO_REMOVE and OPER_TODO_CLEAR to add, remove or remove all operators defined on the owner

msgBundleClassName - the message bundle name that holds the description of the operator displayed in the search form

strCode - the key used to lookup the message bundle

oper - the operator string saved in the view criteria item xml. For example oper could be ">" msgbundleClass could be "OperatorsBundle" and strCode could be "GREATER_THAN". The bundle may contain the value "Greater than" for key "GREATER_THAN".

minCardinality - the minimum cardinality of the operator. for example "greater than" has a minimum cardinality of 1 and "is not null" operator has a minimum cardinality of 0.

maxCardinality - the maximum cardinality of the operator. for example "greater than" has a maximum cardinality of 1 and "between" has a maximum cardinality of 2.

expression - a groovy expression that returns a where clause fragment. The expression is passed a reference to a ViewCriteriaItem and can introspect into the values of the item by calling public methods on it.

JboCompOper

public JboCompOper(int toDo,
                   java.lang.String operDesc,
                   java.lang.String oper,
                   int minCardinality,
                   int maxCardinality,
                   java.lang.String expression)

Creates an instance of a comparison operator used in view criteria

Parameters:

toDo - use OPER_TODO_ADD, OPER_TODO_REMOVE and OPER_TODO_CLEAR to add, remove or remove all operators defined on the owner.

operDesc - a non-translatable description for the operator.

oper - the operator string saved in the view criteria item xml. For example oper could be ">" operDesc could be passed in as "Greater than".

minCardinality - the minimum cardinality of the operator. for example "greater than" has a minimum cardinality of 1 and "is not null" operator has a minimum cardinality of 0.

maxCardinality - the maximum cardinality of the operator. for example "greater than" has a maximum cardinality of 1 and "between" has a maximum cardinality of 2.

expression - a groovy expression that returns a where clause fragment. The expression is passed a reference to a ViewCriteriaItem and can introspect into the values of the item by calling public methods on it.

JboCompOper

public JboCompOper(java.lang.String id,
                   int toDo,
                   java.lang.String operDesc,
                   java.lang.String oper,
                   int minCardinality,
                   int maxCardinality,
                   java.lang.String expression)

Creates an instance of a comparison operator used in view criteria. Use this constructor if this operator will be written out to xml for DT@RT usages.

Parameters:

id - The string used to identify a comp operator occurence uniquely under an owner. Theoretically a user can remove a system provided operator and implement an overridden version. For example TODO_REMOVE, > and TODO_ADD, >, custom expression. The same operator is repeated twice and hence the need to introduce a unique attribute to identify an element.

toDo - use OPER_TODO_ADD, OPER_TODO_REMOVE and OPER_TODO_CLEAR to add, remove or remove all operators defined on the owner.

operDesc - a non-translatable description for the operator.

oper - the operator string saved in the view criteria item xml. For example oper could be ">" operDesc could be passed in as "Greater than".

minCardinality - the minimum cardinality of the operator. for example "greater than" has a minimum cardinality of 1 and "is not null" operator has a minimum cardinality of 0.

maxCardinality - the maximum cardinality of the operator. for example "greater than" has a maximum cardinality of 1 and "between" has a maximum cardinality of 2.

expression - a groovy expression that returns a where clause fragment. The expression is passed a reference to a ViewCriteriaItem and can introspect into the values of the item by calling public methods on it.

Method Detail

populateCompOpers

public static void populateCompOpers()

addCompOper

public static void addCompOper(int typeGroup,
                               java.lang.Class msgBundleClass,
                               java.lang.String strCode,
                               java.lang.String oper,
                               int minCardinality,
                               int maxCardinality)

For internal use only to load framework operators for a particular type.

addCompOper

public static void addCompOper(int typeGroup,
                               java.lang.String operDesc,
                               java.lang.String oper,
                               int minCardinality,
                               int maxCardinality)

For internal use only to load framework operators for a particular type.

addCompOperEntry

public static void addCompOperEntry(int typeGroup,
                                    int toDo,
                                    java.lang.Class msgBundleClass,
                                    java.lang.String strCode,
                                    java.lang.String oper,
                                    int minCardinality,
                                    int maxCardinality)

For internal use only to load framework operators for a particular type.

addCompOperEntry

public static void addCompOperEntry(int typeGroup,
                                    int toDo,
                                    java.lang.String operDesc,
                                    java.lang.String oper,
                                    int minCardinality,
                                    int maxCardinality)

For internal use only to load framework operators for a particular type.

mergeEntry

public static void mergeEntry(java.util.ArrayList list,
                              int toDo,
                              java.lang.Object ent)

For internal use only. Manges a operator list for an owner by adding or removing entries.

Parameters:

list - the collected list of operators.

toDo - OPER_TODO_ADD, OPER_TODO_REMOVE and OPER_TODO_CLEAR to add, remove or remove all operators defined on the owner.

ent - the operator entry that is applying the change.

mergeEntries

public static void mergeEntries(java.util.ArrayList opers,
                                java.util.ArrayList list)

For internal use only. Manges a operator list for an owner by adding or removing entries.

Parameters:

opers - the collected list of operators.

list - the list of changes to be applied on opers.

getCompOperList

public static void getCompOperList(int typeGroup,
                                   java.util.ArrayList list)

The list of operators for a specific type. Used in View Criteria design time to default the correct operators for a data type.

Parameters:

typeGroup - the type for which the operators need to be returned.

list - the list of operators.

getAllBaseCompOpers

public static java.util.HashMap getAllBaseCompOpers(LocaleContext locale)

For internal use only.

Returns:

a deep copy of the system level operators.

getBaseCompOpers

public static java.lang.String[][] getBaseCompOpers(LocaleContext locale)

For internal use only.

Returns:

a deep copy of system level operators for the default type.

processCompOpers

public static java.lang.String[][] processCompOpers(LocaleContext locale,
                                                    java.util.ArrayList list)

Parameters:

locale - the locale to fetch the operator descriptions

list - the list of operators

Returns:

an n x 2 array where n is the size of list and each element containing the operator name and description

getToDo

public int getToDo()

Returns:

OPER_TODO_ADD, OPER_TODO_REMOVE and OPER_TODO_CLEAR to add, remove or remove all operators defined on the owner.

getMessageBundleClass

public java.lang.Class getMessageBundleClass()

Returns:

The message bundle class that holds the description of the operator.

setMessageBundleClass

public void setMessageBundleClass(java.lang.Class cls)

Parameters:

cls - The message bundle class that holds the description of the operator.

setResourceBundleDef

public void setResourceBundleDef(ResourceBundleDef def)

Parameters:

def - ResourceBundleDef is an abstraction around alternate message bundle types supported by the framework like xlf, properties bundle.

getOperDescStrCode

public java.lang.String getOperDescStrCode()

Returns:

The message bundle or resource bundle key to look up the operator description.

getOperDesc

public java.lang.String getOperDesc()

Returns:

If supplied during creation, the non-translatable operator description.

getOperDescStr

public java.lang.String getOperDescStr(LocaleContext locale)

Parameters:

locale - the locale used to fetch the operator description

Returns:

the description of the operator for a specific locale.

getMinCardinality

public int getMinCardinality()

getMaxCardinality

public int getMaxCardinality()

getOper

public java.lang.String getOper()

getExpression

public java.lang.String getExpression()

clone

public java.lang.Object clone()

Overrides:

clone in class java.lang.Object

equals

public boolean equals(java.lang.Object other)

Overrides:

equals in class java.lang.Object

isDirty

public boolean isDirty()

Description copied from interface: DefPersistable

This method returns if an Object is modified from last save/load

Specified by:

isDirty in interface DefPersistable

Returns:

Returns true if the Object is dirty. Returns false otherwise.

setDirty

public void setDirty(boolean isDirty)

Description copied from interface: DefPersistable

This method marks the Object dirty

Specified by:

setDirty in interface DefPersistable

Parameters:

isDirty - If true the Object is marked Dirty.

isNew

public boolean isNew()

Description copied from interface: DefPersistable

This method returns if this object is previously persisted.

Specified by:

isNew in interface DefPersistable

Returns:

true if the Object is previously persisted. Returns false otherwise.

setNew

public void setNew(boolean b)

Description copied from interface: DefPersistable

This method marks the as previously persisted. By default all objects are new objects. When the object is persisted first time, that object is marked as 'not new' object

Specified by:

setNew in interface DefPersistable

Parameters:

b - If true the Object is marked as new object.

getFullName

public java.lang.String getFullName()

Description copied from interface: DefPersistable

This method returns the Persistence reference of the object. The Persistence Reference is uniquely identifiable fully qualified name of the object.

Specified by:

getFullName in interface DefPersistable

Returns:

the Persistence Reference of the object

getOrigObject

public DefPersistable getOrigObject()

Specified by:

getOrigObject in interface DefPersistable

setOrigObject

public void setOrigObject(DefPersistable oldObj)

Specified by:

setOrigObject in interface DefPersistable

writeObject

public void writeObject(DefWriter jos)

Description copied from interface: PersistentDefinition

Objects should write their persistence output in this method

Specified by:

writeObject in interface PersistentDefinition

Parameters:

jos - the Output storage for persistence

writeContents

public void writeContents(DefWriter jos)

Description copied from interface: PersistentDefinition

Objects should write their persistence output in this method

Specified by:

writeContents in interface PersistentDefinition

Parameters:

jos - the Output storage for persistence

writeContents

public void writeContents(DefWriter jos,
                          boolean bWriteId)

writeChildren

public void writeChildren(DefWriter jos)

Description copied from interface: PersistentDefinition

Writes the Object's children to the Persistent storage

Specified by:

writeChildren in interface PersistentDefinition

Parameters:

jos - the Output storage for persistence

loadXMLContent

public void loadXMLContent(DefElement xmlElement)

getDefXMLElementTag

public java.lang.String getDefXMLElementTag()

For internal use only

Specified by:

getDefXMLElementTag in interface PersistentDefinition

getXMLElementTag

public java.lang.String getXMLElementTag()

For internal use only

Specified by:

getXMLElementTag in interface PersistentDefinition

Returns:

returns the Statement required to store in Persitent Storage. Incase of XML, it just returns the String. In the case of SQL a JDBC PreparedStatement is returned.

getDefXMLNameSpace

public java.lang.String getDefXMLNameSpace()

For internal use only

Specified by:

getDefXMLNameSpace in interface PersistentDefinition

isRelationalOperator

public boolean isRelationalOperator()

If a view criteria item has a value set, temporary bind variables are generated for the values to use statement caching efficiently. If the operator is a relational operator then the temporary bind var type is set to the same type we compare against.

Returns:

true if the operator is relational.

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