org.h2.engine

类 FunctionAlias

java.lang.Object

org.h2.engine.DbObjectBase

org.h2.schema.SchemaObjectBase

org.h2.engine.FunctionAlias

所有已实现的接口:

DbObject, SchemaObject

public class FunctionAlias
extends SchemaObjectBase

Represents a user-defined function, or alias.

作者:

Thomas Mueller, Gary Tong

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	FunctionAlias.JavaMethod There may be multiple Java methods that match a function name.

字段概要

从类继承的字段 org.h2.engine.DbObjectBase

comment, database, trace

从接口继承的字段 org.h2.engine.DbObject

AGGREGATE, COMMENT, CONSTANT, CONSTRAINT, FUNCTION_ALIAS, INDEX, RIGHT, ROLE, SCHEMA, SEQUENCE, SETTING, TABLE_OR_VIEW, TRIGGER, USER, USER_DATATYPE

方法概要

限定符和类型	方法和说明
void	checkRename() Check if this object can be renamed.
FunctionAlias.JavaMethod	findJavaMethod(Expression[] args) Find the Java method that matches the arguments.
String	getCreateSQL() Build a SQL statement to re-create this object.
String	getCreateSQLForCopy(Table table, String quotedName) Build a SQL statement to re-create the object, or to create a copy of the object with a different name or referencing a different table
String	getDropSQL() Build a SQL statement to drop this object.
String	getJavaClassName()
String	getJavaMethodName()
FunctionAlias.JavaMethod[]	getJavaMethods() Get the Java methods mapped by this function.
String	getSource()
String	getSQL() Get the SQL name of this object (may be quoted).
int	getType() Get the object type.
boolean	isBufferResultSetToLocalTemp() Should the return value ResultSet be buffered in a local temporary file?
boolean	isDeterministic()
static FunctionAlias	newInstance(Schema schema, int id, String name, String javaClassMethod, boolean force, boolean bufferResultSetToLocalTemp) Create a new alias based on a method name.
static FunctionAlias	newInstanceFromSource(Schema schema, int id, String name, String source, boolean force, boolean bufferResultSetToLocalTemp) Create a new alias based on source code.
void	removeChildrenAndResources(Session session) Remove all dependent objects and free all resources (files, blocks in files) of this object.
void	setDeterministic(boolean deterministic)

从类继承的方法 org.h2.schema.SchemaObjectBase

getSchema, initSchemaObjectBase, isHidden

从类继承的方法 org.h2.engine.DbObjectBase

getChildren, getComment, getDatabase, getId, getModificationId, getName, initDbObjectBase, invalidate, isTemporary, isValid, rename, setComment, setModified, setObjectName, setTemporary, toString

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

从接口继承的方法 org.h2.engine.DbObject

getChildren, getComment, getDatabase, getId, getName, isTemporary, rename, setComment, setTemporary

方法详细资料

newInstance

public static FunctionAlias newInstance(Schema schema,
                                        int id,
                                        String name,
                                        String javaClassMethod,
                                        boolean force,
                                        boolean bufferResultSetToLocalTemp)

Create a new alias based on a method name.

参数:

schema - the schema

id - the id

name - the name

javaClassMethod - the class and method name

force - create the object even if the class or method does not exist

bufferResultSetToLocalTemp - whether the result should be buffered

返回:

the database object

newInstanceFromSource

public static FunctionAlias newInstanceFromSource(Schema schema,
                                                  int id,
                                                  String name,
                                                  String source,
                                                  boolean force,
                                                  boolean bufferResultSetToLocalTemp)

Create a new alias based on source code.

参数:

schema - the schema

id - the id

name - the name

source - the source code

force - create the object even if the class or method does not exist

bufferResultSetToLocalTemp - whether the result should be buffered

返回:

the database object

getCreateSQLForCopy

public String getCreateSQLForCopy(Table table,
                                  String quotedName)

从接口复制的说明: DbObject

Build a SQL statement to re-create the object, or to create a copy of the object with a different name or referencing a different table

参数:

table - the new table

quotedName - the quoted name

返回:

the SQL statement

getDropSQL

public String getDropSQL()

从类复制的说明: DbObjectBase

Build a SQL statement to drop this object.

指定者:

getDropSQL 在接口中 DbObject

指定者:

getDropSQL 在类中 DbObjectBase

返回:

the SQL statement

getSQL

public String getSQL()

从接口复制的说明: DbObject

Get the SQL name of this object (may be quoted).

指定者:

getSQL 在接口中 DbObject

覆盖:

getSQL 在类中 SchemaObjectBase

返回:

the SQL name

getCreateSQL

public String getCreateSQL()

从类复制的说明: DbObjectBase

Build a SQL statement to re-create this object.

指定者:

getCreateSQL 在接口中 DbObject

指定者:

getCreateSQL 在类中 DbObjectBase

返回:

the SQL statement

getType

public int getType()

从接口复制的说明: DbObject

Get the object type.

返回:

the object type

removeChildrenAndResources

public void removeChildrenAndResources(Session session)

从类复制的说明: DbObjectBase

Remove all dependent objects and free all resources (files, blocks in files) of this object.

指定者:

removeChildrenAndResources 在接口中 DbObject

指定者:

removeChildrenAndResources 在类中 DbObjectBase

参数:

session - the session

checkRename

public void checkRename()

从类复制的说明: DbObjectBase

Check if this object can be renamed. System objects may not be renamed.

指定者:

checkRename 在接口中 DbObject

指定者:

checkRename 在类中 DbObjectBase

findJavaMethod

public FunctionAlias.JavaMethod findJavaMethod(Expression[] args)

Find the Java method that matches the arguments.

参数:

args - the argument list

返回:

the Java method

抛出:

DbException - if no matching method could be found

getJavaClassName

public String getJavaClassName()

getJavaMethodName

public String getJavaMethodName()

getJavaMethods

public FunctionAlias.JavaMethod[] getJavaMethods()

Get the Java methods mapped by this function.

返回:

the Java methods.

setDeterministic

public void setDeterministic(boolean deterministic)

isDeterministic

public boolean isDeterministic()

getSource

public String getSource()

isBufferResultSetToLocalTemp

public boolean isBufferResultSetToLocalTemp()

Should the return value ResultSet be buffered in a local temporary file?

返回:

true if yes