I can't believe that the following statement seems to be still true
So, I switched to integers and 0 or 1 works fine, but it is
stupid, that the database system has boolean variables of a smaller
size, but I should use integers for boolean values!
How do you use boolean datatype with Postgres / PHP?
In other words,
Is the only way to use 1 for true and 0 for false in getting the kind of the boolean datatype?