" however, apparently you're not supposed to include the source table in the FROM [email protected], Well, I don't think my original solution would work anyway after reading the reference myself; It seems they frown upon the source table being in the from_list in situations where you are not doing a self-join will return the first non-NULL value.
Making this a value outside of what you'd normally expect will make it easier to isolate such records & deal with appropriately.
Users affected by CVE-2017-7547 will need to perform additional steps after upgrading to resolve the issue.
Other users should plan to update at the next convenient downtime.
They seem to make less sense than nesting in a typical programming language.
If I saw that query, I would translate it to English as: "Get ids from table CUSTID where equals
Practically, you will club many Postgre SQL queries into a group and you will execute all of them together as a part of a transaction.Transactions have the following four standard properties, usually referred to by the acronym ACID − Transactional control commands are only used with the DML commands INSERT, UPDATE and DELETE only.They cannot be used while creating tables or dropping them because these operations are automatically committed in the database.Transactions can be started using BEGIN TRANSACTION or simply BEGIN command.Such transactions usually persist until the next COMMIT or ROLLBACK command is encountered.= OLD.password THEN | NEW.password_changed := current_date; | END IF; | RETURN NEW; | END; Because the trigger is defined within the database it will survive any normal backup and restore process unaffected.