Sql error 42501 error permission denied for relation

A last-minute website error is always frustrating.

PostgreSQL database queries often end up in errors with code 42501.

This PostgreSQL error 42501 usually occurs when an underprivileged user queries a database. This can be tricky to troubleshoot.

That’s why we often get requests to fix PostgreSQL errors as a part of our Server Management Services.

Today, let’s have a look into the error 42501 and see how our Support Engineers fix it for our customers.

When does PostgreSQL error 42501 occur?

Before moving on to the error 42501, let’s first see more about PostgreSQL.

PostgreSQL is one of the versatile database management systems. It comes handy for developers to build applications, server administrators to protect data and so on. In other words, PostgreSQL is a highly extensible database system.

The error code 42501 denotes insufficient privilege for the database user. But, there can be many reasons that lead to this error.

1. Insufficient privilege for the user

Usually, the 42501 error occurs when a PostgreSQL user with insufficient privileges makes a query on a database.

This indicates that the database user executed an operation, for which the user has no rights.

For database management, the user needs enough rights over the database.

When one of our customers was trying to query a database table in a PostgreSQL tool like pgAdmin, it ended up in error 42501.

The error message was

By default, in the PostgreSQL database, the user restoring the database will have the database ownership. For instance, when restoring a database as the root user, all objects will be under root ownership. And if another user is running any query on this database, it shows the 42501 error.

2. SELinux setting

Sometimes, the SELinux setting in the server can also cause an insufficient privilege error.

SELinux is a security architecture that is a part of Linux kernel. In SELinux, access and transition rights of a user, application, process, and file are all defined. Thus, if SELinux is enabled it affects the user privileges then the database query can end up in a 42501 error.

Fix for 42501 permission denied error

When our customers approach us with this error, our Support Team first checks the reasons that cause this error. The major reasons are insufficient user privilege and SELinux settings.

Now, let’s see how our Support Team fixes this error.

1.Granting Privilege to a user

First and foremost, when a customer approaches us with a 42501 error, we check the database user privileges already given.

If the user lacks enough permission, then we change it accordingly.

Mostly, the user does not have privileges over the requested tables.

In this case, we give privileges to the user over the requested tables using the command.

GRANT SELECT ON table_name TO PUBLIC;

This command gives all privileges over the table to the public, hence anyone can use it.

But, some customers prefer giving privileges only to a few users.

In this case, to give table access only to certain users, we use the command.

GRANT SELECT ON table_name TO user_name;

After giving privileges to the user, our Support Team executes the query once again. This ensures that the error is fixed.

Similarly, if the root user restored the dump file, this can cause insufficient privilege for the database user.

That is, if the root user restores the database using pg_dump --no-owner then the root user who restored the database will have all privileges.

So, we always restore the database using the login of the desired user. Then, this user will have all privileges over the database.

2. Disabling SELinux

In some cases, the user has enough privilege over the database and still the database query show 42501 error. Here, the SELinux can be the reason causing the error.

After considering other security settings, our Support Team disables this feature using the command.

selinuxenabled && echo enabled || echo disabled

[Still having trouble in fixing PostgreSQL errors? – We will fix it for you.]

Conclusion

In short, the PostgreSQL error 42501 occurs mainly due to insufficient privileges for database user for running query. We saw how our Support Engineers fixed this error for our customers.

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Quick fix for PostgreSQL error 42501

by Sijin George | Sep 9, 2019

A last-minute website error is always frustrating.

PostgreSQL database queries often end up in errors with code 42501.

This PostgreSQL error 42501 usually occurs when an underprivileged user queries a database. This can be tricky to troubleshoot.

That’s why we often get requests to fix PostgreSQL errors as a part of our Server Management Services.

Today, let’s have a look into the error 42501 and see how our Support Engineers fix it for our customers.

When does PostgreSQL error 42501 occur?

Before moving on to the error 42501, let’s first see more about PostgreSQL.

PostgreSQL is one of the versatile database management systems. It comes handy for developers to build applications, server administrators to protect data and so on. In other words, PostgreSQL is a highly extensible database system.

The error code 42501 denotes insufficient privilege for the database user. But, there can be many reasons that lead to this error.

1. Insufficient privilege for the user

Usually, the 42501 error occurs when a PostgreSQL user with insufficient privileges makes a query on a database.

This indicates that the database user executed an operation, for which the user has no rights.

For database management, the user needs enough rights over the database.

When one of our customers was trying to query a database table in a PostgreSQL tool like pgAdmin, it ended up in error 42501.

The error message was

By default, in the PostgreSQL database, the user restoring the database will have the database ownership. For instance, when restoring a database as the root user, all objects will be under root ownership. And if another user is running any query on this database, it shows the 42501 error.

2. SELinux setting

Sometimes, the SELinux setting in the server can also cause an insufficient privilege error.

SELinux is a security architecture that is a part of Linux kernel. In SELinux, access and transition rights of a user, application, process, and file are all defined. Thus, if SELinux is enabled it affects the user privileges then the database query can end up in a 42501 error.

Fix for 42501 permission denied error

When our customers approach us with this error, our Support Team first checks the reasons that cause this error. The major reasons are insufficient user privilege and SELinux settings.

Now, let’s see how our Support Team fixes this error.

1.Granting Privilege to a user

First and foremost, when a customer approaches us with a 42501 error, we check the database user privileges already given.

If the user lacks enough permission, then we change it accordingly.

Mostly, the user does not have privileges over the requested tables.

In this case, we give privileges to the user over the requested tables using the command.

This command gives all privileges over the table to the public, hence anyone can use it.

But, some customers prefer giving privileges only to a few users.

In this case, to give table access only to certain users, we use the command.

After giving privileges to the user, our Support Team executes the query once again. This ensures that the error is fixed.

Similarly, if the root user restored the dump file, this can cause insufficient privilege for the database user.

That is, if the root user restores the database using pg_dump —no-owner then the root user who restored the database will have all privileges.

So, we always restore the database using the login of the desired user. Then, this user will have all privileges over the database.

2. Disabling SELinux

In some cases, the user has enough privilege over the database and still the database query show 42501 error. Here, the SELinux can be the reason causing the error.

After considering other security settings, our Support Team disables this feature using the command.

[Still having trouble in fixing PostgreSQL errors? – We will fix it for you.]

Conclusion

In short, the PostgreSQL error 42501 occurs mainly due to insufficient privileges for database user for running query. We saw how our Support Engineers fixed this error for our customers.

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Источник

Not able to use a different connection for the database when using Postgres: Insufficient privilege #1109

Bug Report

Summary

Even if many connections are configured, Doctrine doesn’t use the specified connection in the doctrine_migrations.yaml file. Possibly related to #1062 .

Current behavior

When running php bin/console doctrine:migrations:migrate , the command returns the following error:

I have tried allowing the regular user to create the doctrine_migration_versions table, as I suspected that maybe the issue had something to do with that. But with no luck. Reproducible with the following commands:

• GRANT ALL PRIVILEGES ON SCHEMA application TO all privileges on schema application to app_user
• php bin/console doctrine:migrations:migrate
• REVOKE ALL PRIVILEGES ON SCHEMA application FROM app_user;
• php bin/console doctrine:migrations:migrate

How to reproduce

• Minimum working repository at https://github.com/MikelAlejoBR/doctrinebug . Just do docker-compose up and try to run php bin/console doctrine:migrations:migrate .

Otherwise, the manual steps are:

1. Create a new empty Postgres database with version 13.1
2. Create a pair of users in that database, one with only USAGE privileges with the following script:

1. Create a new Symfony installation with symfony new —full mybugtest
2. Configure the connections in config/packages/doctrine.yaml :

1. Configure the URLs in the .env file:

1. Set the manager connection in config/packages/doctrine_migrations.yaml :

1. Try to php bin/console doctrine:migrations:migrate

Expected behavior

The doctrine_migration_versions table is created, and the corresponding migrations run with the specified connection in the doctrine_migrations.yml file.

The text was updated successfully, but these errors were encountered:

Источник

42501: НЕДОСТАТОЧНАЯ ОШИБКА ПРИВИЛЕГИИ при запросе в Postgresql

Я пытаюсь запросить таблицу базы данных в postgresql, но каждый раз, когда я запускаю приведенный ниже запрос, он выдает ошибку INSUFFICIENT PRIVILEGE. Что, возможно, может быть причиной такой ошибки отказа в разрешении. Кроме того, я использую инструмент pgadmin в Windows для подключения базы данных, которая находится в среде Linux. Ниже приведен запрос, который я запускаю

При выполнении того же запроса я получаю следующую ошибку

Пользователю, выполняющему запрос, потребуются разрешения на доступ к этой таблице. Вы можете предоставить их этому пользователю с помощью инструкции GRANT. Ниже приведен пример, который предоставляет PUBLIC

Также я видел, как SELinux вызывает проблемы, и такие места, как здесь, упоминают об этом. Я не совсем уверен в команде для отключения SELinux, но вы можете увидеть, работает ли она, используя

Это просто означает, что у вас нет разрешения на доступ к таблице приложений. Попросите своего корневого администратора или администратора базы данных предоставить вам разрешение на доступ к таблице приложений. если вы являетесь пользователем root или имеете привилегию предоставления, вы можете использовать команду предоставления, чтобы предоставить себе разрешение на использование всех операторов sql в таблице или базе данных
. Например:

перед этим вы должны войти в систему как пользователь root или пользователь, у которого есть права на предоставление прав.
Для получения более подробной информации об этой команде обратитесь к http://www.postgresql.org/docs/8.1/static/sql-grant.html

Если это DB2, перейдите в командную консоль DB2, выберите соответствующую базу данных и выберите параметр «Власти», щелкнув правой кнопкой мыши базу данных, затем добавьте соответствующего пользователя DB2 и предоставьте требуемый доступ.

Вы должны убедиться, что пользователь, с которым вы подключаетесь, также имеет доступ «ИСПОЛЬЗОВАНИЕ» к схеме, к которой вы пытаетесь получить доступ с пользователем. Недавно я столкнулся с ошибкой, когда я восстановил дамп в базу данных, а затем у некоторых пользователей я должен был предоставить доступ только для чтения. Я выполнил следующие шаги —

После выполнения этих действий, когда я пытался получить доступ к таблице, я получил следующую ошибку —

В моем случае мои пользователи уже были доступны, а схемы и база данных были недавно восстановлены. После того, как я предоставил пользователю доступ «USAGE» к схеме, ошибка была устранена.

Источник

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Way too much, right?

You as a sysadmin know that for sure – Syntax Errors, Relation Errors, Server Connection Errors, and other Error Codes.

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1. PostgreSQL error

“Error: syntax error at or near ‘grant’”

Quick fix

The error message “syntax error at or near ‘grant’” is one of the most common PostgreSQL database errors. However, it can easily be identified and resolved.

To understand this issue, you need to know that SQL distinguishes between reserved and non-reserved key word tokens. Reserved key words, such as “grant”, are never allowed as identifiers. Most reserved tokens are not allowed as column or table names, but may be allowed as an “AS” column label name.

If you come across this error message, check your code and make sure that the reserved keyword, for example “grant”, is quoted. Without using quotes, the error message will pop up in the PostgreSQL database.

Proper fix

Switch to PRTG: Professional database monitor PRTG is an all-in-one database monitoring tool to monitor your PostgreSQL database, avoid downtimes, and optimize performance.

Find out how PRTG’s Database Monitoring can help you get rid of PostgreSQL errors: www.paessler.com/database-monitoring and www.paessler.com/postgresql-monitoring

2. PostgreSQL error

“Error 42501” or “Permission Denied”

Quick fix

PostgreSQL error 42501 is a common error that sometimes occurs in response to a PostgreSQL database query. In most cases, error code 42501 implies that the user has insufficient privilege for the database. As soon as a user with insufficient privileges make a query, PostgreSQL responds with the error message.

To fix the problem, check the database user privileges. If the user who attempted the query lacks permission, simply change the privileges accordingly. You can give privileges for a table either to the public using “GRANT SELECT ON table_name TO PUBLIC;” or to only a few users using the command “GRANT SELECT ON table_name to user_name;”.

Proper fix

Switch to PRTG: Professional database monitor PRTG is an all-in-one database monitoring tool to monitor your PostgreSQL database, avoid downtimes, and optimize performance.

Find out how PRTG’s Database Monitoring can help you get rid of PostgreSQL errors: www.paessler.com/database-monitoring and www.paessler.com/postgresql-monitoring

3. PostgreSQL error

“Error 1053” or “The service did not respond to the start or control request in a timely fashion”

Quick fix

Are you facing error code 1053 while working with the PostgreSQL database? Then you have come across a common PostgreSQL error. The error code is usually accompanied by the message “the service did not respond to the start or control request in a timely fashion”.

There are several possible causes for error 1053, such as low timeout values, firewall restrictions, corrupted files and permission of files. The solution for PostgreSQL error 1052 depends on the individual cause:

1. If caused by a low timeout value, get rid of error code 1053 by setting a ServicesPipeTimeout DWORD value in the registry editor to override the default timeout time of your database.
2. If your firewall prevents your PostgreSQL database from working correctly, disable your firewall or change the settings to allow all database requests to run smoothly.
3. If corrupted files or permission of files are the cause of this error to occur, use the file checking tools to check the system file structure and replace corrupted files to eliminate of error 1053.

Proper fix

Switch to PRTG: Professional database monitor PRTG is an all-in-one database monitoring tool to monitor your PostgreSQL database, avoid downtimes, and optimize performance.

Источник

42501: НЕДОСТАТОЧНАЯ ОШИБКА ПРИВИЛЕГИИ во время запроса в Postgresql

Я пытаюсь запросить таблицу базы данных в postgresql, но каждый раз, когда я запускаю приведенный ниже запрос, он выдает мне сообщение INSUFFICIENT PRIVILEGE. В чем, возможно, может быть причина такого разрешения, отказано в ошибке. Также я использую инструмент pgadmin в Windows для подключения к базе данных, которая находится в среде Linux. Ниже приведен запрос, который я выполняю

При выполнении того же запроса я получаю сообщение об ошибке ниже

3 ответа

Пользователю, выполняющему запрос, потребуются разрешения на эту таблицу. Вы можете предоставить их этому пользователю с помощью инструкции GRANT. Ниже приведен пример, который предоставляет PUBLIC

Также я видел, как SELinux вызывает иссы и такие места, как здесь, об этом упоминают. Я не совсем уверен, что команда отключит SELinux, но вы можете увидеть, работает ли он, используя

Это просто означает, что у вас нет прав доступа к таблице приложения. Запросите у администратора root или базы данных разрешение на доступ к таблице приложений. если вы являетесь пользователем root или у вас есть привилегия предоставления, вы можете использовать команду grant, чтобы предоставить себе разрешение на использование всех операторов SQL в таблице или базе данных.
Например:

перед этим вы должны войти в систему как пользователь root или пользователь, который имеет привилегии
Для получения более подробной информации об этой команде см. http://www.postgresql.org/docs/8.1/static/sql-grant.html

Если это DB2, перейдите в командную консоль DB2, выберите соответствующую базу данных и выберите опцию Authorities, щелкнув правой кнопкой мыши на базе данных, затем добавьте соответствующего пользователя DB2 и предоставьте необходимый доступ.

Вам необходимо убедиться, что пользователь, с которым вы подключаетесь, также имеет доступ «USAGE» к схеме, к которой вы пытаетесь получить доступ с пользователем. Недавно я столкнулся с ошибкой, когда я восстановил дамп в базе данных, а затем у меня было несколько пользователей, которым я должен был предоставить доступ только для чтения. Я выполнил следующие шаги —

После выполнения этих шагов, когда я попытался получить доступ к таблице, получил следующую ошибку:

В моем случае мои пользователи уже были доступны, а схемы и база данных были недавно восстановлены. После того как я предоставил пользователю доступ к схеме «ИСПОЛЬЗОВАНИЕ», ошибка была устранена.

Источник

5 ответов

CREATE USER readonly  WITH ENCRYPTED PASSWORD 'readonly';
GRANT USAGE ON SCHEMA public to readonly;
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO readonly;

-- repeat code below for each database:

GRANT CONNECT ON DATABASE foo to readonly;
c foo
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT ALL ON TABLES TO readonly; --- this grants privileges on new tables generated in new database "foo"
GRANT USAGE ON SCHEMA public to readonly; 
GRANT SELECT ON ALL SEQUENCES IN SCHEMA public TO readonly;
GRANT SELECT ON ALL TABLES IN SCHEMA public TO readonly;

GRANT USAGE ON SCHEMA public to readonly;

GRANT ALL ON TABLE mytable TO myuser;

GRANT ALL ON TABLE tbm_grupo TO myuser;

postgres=# du
                             List of roles
 Role name |                   Attributes                   | Member of 
-----------+------------------------------------------------+-----------
 flux      |                                                | {}
 postgres  | Superuser, Create role, Create DB, Replication | {}

postgres=# ALTER ROLE flux WITH Superuser;
ALTER ROLE
postgres=# du
                             List of roles
 Role name |                   Attributes                   | Member of 
-----------+------------------------------------------------+-----------
 flux      | Superuser                                      | {}
postgres  | Superuser, Create role, Create DB, Replication | {}