Hello PostgreSQL Community,
I have 25+ years of experience with some other RDBMS, but I am a PostgreSQL starter, so I assume the following is rather a simple beginner’s question…:
I like to store just a single bit but that can be either 1 or 0, so I tried to do this:
CREATE TABLE T (c BIT);
INSERT INTO T VALUES (1);
-- I MUST NOT change both lines in any way as these are part of a third-party application!
Unfortunately this tells me:
column "c" is of type bit but expression is of type integer
So I logged in as a cluster admin and I tried this:
CREATE CAST (integer AS bit) WITH INOUT AS IMPLICIT;
Unfortunately that tells me:
cast from type integer to type bit already exists
This is confusing! Apparently PostgreSQL 15.3 comes with the needed cast out-of-the-box but it does not apply it? This is confusing!
What is my fault?
Thanks!
-Markus