search
HomeDatabaseMysql TutorialPL SQL 查询时 dynamic performance tables not accessible 错误

今天在使用PL/SQL Developer工具登陆一个新创建的用户进行查询时,报出以下错误(PL/SQL Developer版本:7.1.5 1403): Dynamic Performance Tables not accessible, Automatic Statistics disabled for this session You can disable statistics in the pr

今天在使用PL/SQL Developer工具登陆一个新创建的用户进行查询时,报出以下错误(PL/SQL Developer版本:7.1.5 1403):

Dynamic Performance Tables not accessible,

Automatic Statistics disabled for this session


You can disable statistics in the preference menu, or obtain select

priviliges on the V$session,V$sesstat and V$statname tables

 

这个报错信息在不同的PL/SQL Developer版本都会出现,从上面详细的报错提示信息中我们可以判断得到,报错原因不在工具本身。

 

在此,详细记录一下这个小问题的三种处理方法。

1.第一种处理方法(不推荐)

就是在报错的Error对话框中将“Don't show this message again”选项选中,下次就不在提示这个错误了。

这种方法应该可以叫做“鸵鸟方式”的处理方法。没有从根本上解决这个问题。

 

2.第二种处理方法(可以采纳)

报错信息中描述的非常详细,原因是动态性能表没有权利被访问导致的问题,因此,我们通过把所需访问权限赋予给具体用户的方法来解决这个问题。

这里给出我能想到的三种具体处理方法。大家可以继续补充。

1)如果只是某一具体用户有权限查询这三个动态性能视图,可以如下进行操作

这里注意一下:我们授权的视图是V_$session不是V$session,因为V$session是同名不是具体的视图。否则您会收到下面这个错误。

sys@ora10g> grant select on V$session  to user_sec;

grant select on V$session  to user_sec

                *

ERROR at line 1:

ORA-02030: can only select from fixed tables/views

 

正确的授权方法如下:

SQL> grant select on V_$session  to user_sec;

SQL> grant select on V_$sesstat  to user_sec;

SQL> grant select on V_$statname to user_sec;

 

2)可以使用下面这个“简单粗暴”的方法处理之。

SQL> grant SELECT ANY DICTIONARY to user_sec;

 

3)以上两种方法是针对特定用户的处理方法,如果想让所有用户(不局限在上面的user_sec用户)都能够查询这三个动态性能视图,可以通过将查询权限授权给public方法来实现,操作如下。这样就可以保证所有开发人员都不会再出现上述的报错信息了。

SQL> grant select on V_$session  to public;

SQL> grant select on V_$sesstat  to public;

SQL> grant select on V_$statname to public;

 

3.第三种方法(推荐)

彻底禁掉PL/SQL Developer的这个功能。

方法如下:

导航到Tools --> Preferences --> Options

找到“Automatic Statistics”选项,将其前面的小对勾去掉,然后点击“Apply”和“OK”保存退出。

 

4.小结

之所以书写这个文章,只是给出一个处理问题的一般方法,这就是:“充分挖掘具体报错信息,从各种表面现象入手,逐步深入,最终得到满意的处理结果。”

 

最后谈一下DBA与数据库管理开发工具(如PL/SQL Developer、Toad等等)的关系。

 

如果您是纯开发DBA,那么强烈建议您认真的研究这些优秀高级工具的每一个细节,因为这样可以大大的提高您的工作效率。

 

博文来源:http://space.itpub.net/519536/viewspace-614671

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Explain the InnoDB Buffer Pool and its importance for performance.Explain the InnoDB Buffer Pool and its importance for performance.Apr 19, 2025 am 12:24 AM

InnoDBBufferPool reduces disk I/O by caching data and indexing pages, improving database performance. Its working principle includes: 1. Data reading: Read data from BufferPool; 2. Data writing: After modifying the data, write to BufferPool and refresh it to disk regularly; 3. Cache management: Use the LRU algorithm to manage cache pages; 4. Reading mechanism: Load adjacent data pages in advance. By sizing the BufferPool and using multiple instances, database performance can be optimized.

MySQL vs. Other Programming Languages: A ComparisonMySQL vs. Other Programming Languages: A ComparisonApr 19, 2025 am 12:22 AM

Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages ​​such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages ​​have advantages in their respective fields such as data analytics, enterprise applications, and system programming.

Learning MySQL: A Step-by-Step Guide for New UsersLearning MySQL: A Step-by-Step Guide for New UsersApr 19, 2025 am 12:19 AM

MySQL is worth learning because it is a powerful open source database management system suitable for data storage, management and analysis. 1) MySQL is a relational database that uses SQL to operate data and is suitable for structured data management. 2) The SQL language is the key to interacting with MySQL and supports CRUD operations. 3) The working principle of MySQL includes client/server architecture, storage engine and query optimizer. 4) Basic usage includes creating databases and tables, and advanced usage involves joining tables using JOIN. 5) Common errors include syntax errors and permission issues, and debugging skills include checking syntax and using EXPLAIN commands. 6) Performance optimization involves the use of indexes, optimization of SQL statements and regular maintenance of databases.

MySQL: Essential Skills for Beginners to MasterMySQL: Essential Skills for Beginners to MasterApr 18, 2025 am 12:24 AM

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL: Structured Data and Relational DatabasesMySQL: Structured Data and Relational DatabasesApr 18, 2025 am 12:22 AM

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL: Key Features and Capabilities ExplainedMySQL: Key Features and Capabilities ExplainedApr 18, 2025 am 12:17 AM

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

The Purpose of SQL: Interacting with MySQL DatabasesThe Purpose of SQL: Interacting with MySQL DatabasesApr 18, 2025 am 12:12 AM

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

MySQL for Beginners: Getting Started with Database ManagementMySQL for Beginners: Getting Started with Database ManagementApr 18, 2025 am 12:10 AM

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.