I have a table that currently has less than 2 billion records, and its primary key is set as "Serial" data type, which can handle up to 2 billion records. However, I anticipate that the limit will be reached soon.
Since I don't use the primary key anywhere in the query and it doesn't have any relation with any other table, I am considering dropping the primary key column itself.
My concern is how much time it will take to drop the column from the table, and whether it will cause any lock or downtime issues for the other queries accessing the table.
Could you please explain the process of dropping a column in PostgreSQL?