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ORA-39254: direct path load not possible into preexisting table with column that has a default value and is not being loaded; table string, column string

文档解释ORA-39254:directpathloadnotpossibleintopreexistingtablewithcolumnthathasadefaultvalueandisnotbeingloaded;tablestring,columnstringCause:Thedirectpathaccessme...

IT技术学习 ·2025-02-22

ORA-28340: a different encryption algorithm has been chosen for the table

文档解释ORA-28340:adifferentencryptionalgorithmhasbeenchosenforthetableCause:Existingencryptedcolumnswereassociatedwithadifferentalgorithm.Action:Noneedtospecifyana...

IT技术学习 ·2025-02-20

ORA-15276: ASM diskgroup string has cluster voting files

文档解释ORA-15276:ASMdiskgroupstringhasclustervotingfilesCause:Anattemptwasmadetodropadiskgroupthatcontainedclustervotingfiles.Action:Movetheclustervotingfilesoutof...

IT技术学习 ·2025-02-20

ORA-16451: A remote archival request has timed out.

文档解释ORA-16451:Aremotearchivalrequesthastimedout.Cause:Whenopeningorclosingadatabaseinstance,thedatabasemaywaitforupto1minuteforpendingremotearchivalrequeststobe...

IT技术学习 ·2025-02-14

ORA-14639: SUBPARTITIONS clause can be specfied only for Hash, Composite Range Hash table/partition

文档解释ORA-14639:SUBPARTITIONSclausecanbespecfiedonlyforHash,CompositeRangeHashtable/partitionCause:AttemptedtospecifySUBPARTITIONSclauseontablethatisnotpartitione...

IT技术学习 ·2025-02-14

ORA-19295: XQST0060: It is a static error if the name of a function in a function declaration is not in a namespace (expanded QName has a null namespace URI)

文档解释ORA-19295:XQST0060:Itisastaticerrorifthenameofafunctioninafunctiondeclarationisnotinanamespace(expandedQNamehasanullnamespaceURI)Cause:Anerroroccurredduring...

IT技术学习 ·2025-02-11

什么是Hash算法

什么是Hash算法Hash，一般翻译做“散列”，也有直接音译为“哈希”的，就是把任意长度的输入（又叫做预映射，pre-image），通过散列算法。哈希算法将任意长度的二进制值映射为较短的固定长度的二进制值，这个小的二进制值称为哈希值。哈希值是一段数据唯一且极其紧凑的数值表...

开发笔记 ·2024-09-30

HashMap的实现原理

(1)HashMap的概述HashMap是基于哈希表的Map接口的非同步（非线程安全）实现，允许使用null值和null键，此类不保证映射的顺序。(2)HashMap的数据结构HashMap实际上是一个“链表散列”的数据结构，即数组和链表的结合体。HashMap的底层就是一个数组结构，数组中的每...

开发笔记 ·2024-08-28

解决npm安装包时报出：shasum check failed for错误（npm注册国内镜像介绍）

镜像使用方法（三种办法任意一种都能解决问题，建议使用第三种，将配置写死，下次用的时候配置还在）:1.通过config命令1npmconfigsetregistry http://registry.cnpmjs.org2npminfounderscore（如果上面配置正确这个命令会有字符串response）2....

开发笔记 ·2023-12-02

PHP has encountered an Access Violation

解决方法：回收进程池...

开发笔记 ·2023-08-11

ORA-39183: internal error string ocurred during decompression phase string

文档解释ORA-39183:internalerrorstringocurredduringdecompressionphasestringCause:Anunexpectederroroccurredwhiledecompressingdatabuffers.Action:ContactOracleCustomerS...

IT技术学习 ·2023-07-28

ORA-38810: Implementation restriction: cannot drop edition that has a parent and a child

文档解释ORA-38810:Implementationrestriction:cannotdropeditionthathasaparentandachildCause:Thiserroroccurredbecauseanattemptwasmadetodropaneditionthathasaparentandac...

IT技术学习 ·2023-07-28

ORA-27457: argument string of job “string.string” has no value

文档解释ORA-27457:argumentstringofjob“string.string”hasnovalueCause:Novaluewasprovidedforthejobargumentwiththespecifiedposition.Action:Provideavaluefort...

IT技术学习 ·2023-07-28

ORA-38808: edition has a usable parent and a usable child

文档解释ORA-38808:editionhasausableparentandausablechildCause:Anattemptwasmadetomakeaneditionwithausableparentandausablechildeditionunusable.Action:Aneditionwithaus...

IT技术学习 ·2023-07-28

ORA-29374: resource plan string in top-plan string has no plan directives

文档解释ORA-29374:resourceplanstringintop-planstringhasnoplandirectivesCause:Aplanwascreatedinthependingareathatisanorphanorstand-alone.Action:Createplandirectivesi...

IT技术学习 ·2023-07-28