How to Fix 'ERROR: sequence must have the same owner as the table it is linked to' When Adding an Auto-Increment Primary Key in PostgreSQL?

Setting Auto Increment Primary Key in PostgreSQL

When working with PostgreSQL databases, it may be necessary to add an auto-incrementing primary key to a table. This can be particularly useful for ensuring unique identification of rows within the table. However, in certain cases, users may encounter an error while attempting to create an auto-increment primary key, such as:

"ERROR: sequence must have the same owner as the table it is linked to."

Solution:

To resolve this error and add an auto-increment primary key to your PostgreSQL table, follow these steps:

1. Ensure that you are using the same database user who created the table. This is because the sequence used for generating the primary key must have the same owner as the table.
2. Execute the following command:

ALTER TABLE your_table ADD COLUMN key_column BIGSERIAL PRIMARY KEY;

3. Replace "your_table" with the name of your table and "key_column" with the desired name for the primary key column.

By executing this command, you can successfully add an auto-incrementing primary key to your PostgreSQL table without the need to recreate it.

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