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#class
ORA-41682: invalid rule class package
文档解释ORA-41682:invalidruleclasspackageCause:Anattemptwasmadetousearuleclasspackagewithinvalidsignatureorpermissions.Action:Droptheruleclassandrecreateit.ORA-4168...
IT技术学习
·
2023-07-08
ORA-41682
invalid
rule
class
package
ORA-41613: invalid action preference for rule class: string
文档解释ORA-41613:invalidactionpreferenceforruleclass:stringCause:Anattemptwasmadetouseaninvalidactionpreference.Action:Correcttheinputandtryagain.ORA-41613表示规则类型有误...
IT技术学习
·
2023-07-08
ORA-41613
invalid
action
preference
for
ORA-44821: Number of classifiers is too large
文档解释ORA-44821:NumberofclassifiersistoolargeCause:Averylargenumber(>1024)ofclassifierswererequested.Action:Submitasmaller(ORA-44821错误指示您尝试使用的分类器数量过多。该错误可以出现在使...
IT技术学习
·
2023-07-08
ORA-44821
Number
of
classifiers
is
ORA-29509: incorrectly formed Java binary class definition
文档解释ORA-29509:incorrectlyformedJavabinaryclassdefinitionCause:AnattemptwasmadetocreateaJavaclassusingdataexpectedtobeinbinary(Java.class)format.Thedatawasfoundn...
IT技术学习
·
2023-07-08
ORA-29509
incorrectly
formed
Java
binary
ORA-44806: Extra classifiers are present in list
文档解释ORA-44806:ExtraclassifiersarepresentinlistCause:Moreclassifierswerepresentinthelistthanspecified.Action:Onlyincludethenumberofclassifierslessthanorequaltonu...
IT技术学习
·
2023-07-08
ORA-44806
Extra
classifiers
are
present
ORA-41608: rule class does not exist
文档解释ORA-41608:ruleclassdoesnotexistCause:Anattemptwasmadetoaccessaruleclassthatdoesnotexistorisnotaccessible.Action:Correcttheruleclassnameandtryagain.ORA-41608...
IT技术学习
·
2023-07-08
ORA-41608
rule
class
does
not
ORA-41675: schema for data tables does not match that of the rule class
文档解释ORA-41675:schemafordatatablesdoesnotmatchthatoftheruleclassCause:Anattemptwasmadetousethedmleventspolicyforaruleclassthatreferstotableresidingindifferentsch...
IT技术学习
·
2023-07-08
ORA-41675
schema
for
data
tables
ORA-29661: Unable to find the superclass of the defined in the EXTERNAL NAME
文档解释ORA-29661:UnabletofindthesuperclassofthedefinedintheEXTERNALNAMECause:Theclassisnotloadedinthedatabase.Action:MakesurethesuperclassoftheEXTERNALNAMEisloaded...
IT技术学习
·
2023-07-08
the
ORA-29661
Unable
to
find
ORA-41721: invalid use of DMLEVENTS and CNFEVENTS in rule class properties
文档解释ORA-41721:invaliduseofDMLEVENTSandCNFEVENTSinruleclasspropertiesCause:AnattemptwasmadetospecifyboththeDMLEVENTSandCNFEVENTSforthesameruleclass.Action:Remove...
IT技术学习
·
2023-07-08
ORA-41721
invalid
use
of
DMLEVENTS
ORA-41667: rule class results view name already used for an existing object
文档解释ORA-41667:ruleclassresultsviewnamealreadyusedforanexistingobjectCause:Anattemptwasmadetouseaduplicatenamefortheruleclassresultsview.Action:Useadifferentname...
IT技术学习
·
2023-07-08
ORA-41667
rule
class
results
view
List<Class> 如何用多态?
假如:B 是基类,D 是派生类。我们知道可以这么用:Bb=newD();但如果是List<B> 怎么用呢?List<B>bs=newList<D>();??这是错误的。正确如下:List<B>bs=newList<B>();bs....
代码星球
·
2023-04-16
List
何用
多态
Python classmethod()
通常要调用一个类的方法,我们需要首先创建该类的一个实例或对象。但是类方法绑定到类,而不是它的对象,所以类方法函数的创建返回给定函数的类方法**classmethod(function)**#wherefunctionisannameoffunctionclassmethod()函数只接受一个参数参数描述必需/可选函数要...
php学习
·
2023-04-09
Python
classmethod
Python issubclass()
如果函数的第一个参数是第二个参数的子类,则isinstance()函数返回true。实际上,我们可以说这个函数是用来检查给定的类是否是另一个类的子类。**issubclass(class,classinfo)**#whereclassspecifytheclassname字节()参数:取2个参数。我们还可以传递一个类元...
php学习
·
2023-04-09
Python
issubclass
python3 操作excel 报错 AttributeError:module ‘win32com.gen_py.’ has no attribute CLSIDToClassMap
电脑python3使用pywin32操作excel文件就报错。报错信息如下:Traceback(mostrecentcalllast):File"F:Pythonlibsite-packagesxlwings\_xlwindows.py",line288,in__init__File"F:Pythonlibsite-p...
开发笔记
·
2023-03-01
python3
操作
excel
报错
AttributeError
issubclass/type/isinstance、函数和方法、反射、callable、特殊成员补充
一、issubclass/type/isinstance(***) 1、issubclass(参数1,参数2):检查第一个参数是否是第二个参数的子子孙孙类,如下示例:classBase(object):passclassFoo(Base):passclassBar(Foo):passprint(issubclass(...
代码星球
·
2021-02-25
issubclass
type
isinstance
函数
方法
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