There are a lot of PostgreSQL errors out there.
Way too much, right?

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.

Best Solution: https://severalnines.com/blog/decoding-postgresql-error-logs

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;”.

Best Solution: https://bobcares.com/blog/postgresql-error-42501/364570

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.

Best Solution: https://bobcares.com/blog/postgresql-error-1053/

Quick fix

PostgreSQL error message “role does not exist” occurs when connecting to PostgreSQL using a user name that does not exist. The full error message usually states something similar to “FATAL: role “username” does not exist”.

For easy troubleshooting, make sure you have logged in to the correct user. If the user does not exist yet, create the user account on the PostgreSQL database. You should now be able to connect to PostgreSQL.

Best Solution: https://knowledgebase.progress.com/articles/Article/postgresql-error-role-does-not-exist

Quick fix

Are you looking for a solution to PostgreSQL error message “relation does not exist”? As there are several possible causes for this common error, it is often necessary to do some digging in order to find out what causes the PostgreSQL database to respond with the error message.

One of many possible causes is that your postgres user is configured not to use a password, while your connection string includes “password=”. This configuration can result in the error “relation does not exist” to occur. To solve the problem, remove “password=” from the connection string. It should now look like this:

“host=localhost port=5432 user=postgres dbname=t11 sslmode=disable”

Another workaround is to alter the postgres user to require a password, then change the connecting string accordingly.

Best Solution: https://medium.com/@raajyaverdhanmishra/when-you-get-relation-does-not-exist-in-postgres-7ffb0c3c674b

Quick fix

The PostgreSQL error message “could not connect to server: no such file or directory” is known to be caused by problem with the postmaster.

The error message indicates that PostgreSQL is currently not running on the system that the user is logged in to. When dealing with this common error, check for “postmaster.pid” in the data directory. Make sure that the configuration of PostgreSQL allows TCP/IP connections.

Best Solution: https://www.revsys.com/writings/postgresql/errors.html#cannot-connect-local or https://severalnines.com/blog/decoding-postgresql-error-logs

Quick fix

If you have encountered the error message “invalid input syntax” while working with the PostgreSQL database, you are dealing with a common error. The full error message usually looks like this, or similar:

ERROR: invalid input syntax for type numeric: "b" at character 26

The error occurs when the user attempts to insert a value that does not match the column type. If the problem is not caused by an attempt to enter a faulty, it may be an application side error that needs to be solved by the developer.

Best Solution: https://severalnines.com/blog/decoding-postgresql-error-logs

Quick fix

“Permission denied for database” is a group of PostgreSQL errors that is in most cases caused by a lack of user privileges. Depending on the reason for the error to occur, common error messages include “Permission denied for relation”, “Permission denied for sequence”, or “Permission denied for schema”. All of these PostgreSQL errors are related privilege issues.

To solve the problem, there are several possible troubleshooting methods:

1. Make sure that the user is granted the Connect privilege. To grant the privilege, use the command “GRANT CONNECT ON DATABASE userdb TO user ;”.
2. To read data from the table, users require the privilege Connect, Create, Temporary and Select. Whenever you are granting access to a new user, make sure that all necessary privilege is granted.
3. The permission denied error can also be caused by a missing user. If this is the case, update all PostgreSQL users with the proper password and sync it with the Plesk panel.

Best Solution: https://bobcares.com/blog/permission-denied-for-database-postgres/

Quick fix

Another common error code with PostgreSQL database is 42703 as well as the error message “column does not exist”. This error indicates either that the requested column does not it exist, or that the query is not correct.

There are many possible reasons for this issue. To get started, check your query for any mistakes. Often, the error is caused by a lack of quotes. If this is the case, add double quotes to the column name, then try again. 

Best Solution: https://stackoverflow.com/questions/52007364/postgresql-column-doesnt-exist

Quick fix

Lack of disk space is a common problem that can easily be prevented. If you are facing the error message “no space left on device”, there is not enough space on your disk to run the database.

To solve the problem, free some space on the disk and make sure to avoid running out of disk space in the future.

Best Solution: https://www.percona.com/blog/2020/06/05/10-common-postgresql-errors/