CONS主题的文章列表，还有CONS的技术要点_第1页

c++的const修饰符用法

1.将一个对象设置为不可修改constinta=100;2.指向const对象的指针constint*p=3;可以通过指针来修改指针所指向的值，但是不能通过指针*p修改对像的值3.intconst*p=0;可以指针的指向不能改变，但可以修改指向的值，4.指向const对象的const指针。两者都不能修改...

开发笔记 ·2024-09-09

注解 javax.validation.constraints下的注解

@NotBlank,@NotNoll,@NotEmpty实体字段校验之间的区别简单的来说字符串用@NotBlank基本类型用@NotNoll集合类型@NotEmpty...

开发笔记 ·2023-10-20

ORA-00001: unique constraint violated异常处理

程序中保存数据时报错，ORA-00001:uniqueconstraint(xxxx)violated先是查看数据库结构，最近也没什么改动，开发环境也正常，测试环境就报这个错后来发现主键id是自增的，查询序列的下个值 selecttable_seq.nextval fromdual发现这...

开发笔记 ·2023-10-10

ORA-38734: Flashback log is inconsistent; belongs to another database.

文档解释ORA-38734:Flashbacklogisinconsistent;belongstoanotherdatabase.Cause:ThedatabaseIDintheflashbackdatabaselogfiledidnotmatchthedatabaseIDinthecontrolfile.Actio...

IT技术学习 ·2023-07-28

ORA-25127: RELY not allowed in NOT NULL constraint

文档解释ORA-25127:RELYnotallowedinNOTNULLconstraintCause:AnattempttosetRELYonforNOTNULLconstraint.Action:onlyNORELYmaybespecifiedforaNOTNULLconstraint.ORA-25127是一个O...

IT技术学习 ·2023-07-28

ORA-25256: consumer cannot be specified with a single-consumer queue or an exception queue

文档解释ORA-25256:consumercannotbespecifiedwithasingle-consumerqueueoranexceptionqueueCause:Anattemptwasmadetospecifyaconsumerinthesubscriptionstringwhenregistering...

IT技术学习 ·2023-07-28

ORA-28117: integrity constraint violated – parent record not found

文档解释ORA-28117:integrityconstraintviolated–parentrecordnotfoundCause:trytoupdate/insertachildrecordwithnewforeignkeyvalues,butthecorrespondingparentrowisno...

IT技术学习 ·2023-07-28

ORA-30731: scope constraint not allowed on nested table column when the nested table is being created

文档解释ORA-30731:scopeconstraintnotallowedonnestedtablecolumnwhenthenestedtableisbeingcreatedCause:Anattemptwasmadetodefineascopeconstraintonanestedtablecolumnwhen...

IT技术学习 ·2023-07-28

ORA-55493: specified VPD policy constraint does not exist

文档解释ORA-55493:specifiedVPDpolicyconstraintdoesnotexistCause:AnattemptwasmadetooperateonanOracleVirtualPrivateDatabase(VPD)constraintthatdidnotexist.Action:None官...

IT技术学习 ·2023-07-28

ORA-25257: consumer must be specified with a multi-consumer queue

文档解释ORA-25257:consumermustbespecifiedwithamulti-consumerqueueCause:Anattemptwasmadetoregisteronamulti-consumerqueuewithoutspecifyingaconsumerinthesubscriptionst...

IT技术学习 ·2023-07-28

ORA-24003: Queue table index string inconsistent with queue table string

文档解释ORA-24003:QueuetableindexstringinconsistentwithqueuetablestringCause:Thequeuetableindexhasnotyetbeensuccessfullyimported.Action:Importthequeuetableindexbefo...

IT技术学习 ·2023-07-28

ORA-22896: cannot have both scope and referential constraint on REF column “string”

文档解释ORA-22896:cannothavebothscopeandreferentialconstraintonREFcolumn“string”Cause:REFcolumnhasbothareferentialandascopeconstraint.Areferentialconstr...

IT技术学习 ·2023-07-28

ORA-29366: invalid CONSUMER_GROUP argument specified

文档解释ORA-29366:invalidCONSUMER_GROUPargumentspecifiedCause:Aninvalidconsumergroupnamewasspecified.Action:Specifyanon-NULL,validconsumergroupname.。ORA-29366是Oracl...

IT技术学习 ·2023-07-28

ORA-56701: INTERNAL_USE attribute of consumer group string cannot be modified

文档解释ORA-56701:INTERNAL_USEattributeofconsumergroupstringcannotbemodifiedCause:AnattemptwasmadetomodifytheINTERNAL_USEattributeofthespecifiedconsumergroup.Action...

IT技术学习 ·2023-07-28

ORA-32416: one or more commit SCN-based materialized view logs are not in consistent state for fast refresh

文档解释ORA-32416:oneormorecommitSCN-basedmaterializedviewlogsarenotinconsistentstateforfastrefreshCause:Dictionarytable“SYS”.”SNAP_XCMT$”is...

IT技术学习 ·2023-07-28