I’ve been exploring logical replication and noticed that if the column datatypes don’t match between the publisher and subscriber, PostgreSQL doesn’t give a warning. This can cause unexpected behavior, and I thought it might be helpful to alert users when this happens.
**What This Patch Does:**
- Adds a warning when a column's datatype in the subscriber doesn’t match the publisher.
- Helps users catch issues early instead of running into silent errors later.
Why I Think It’s Useful:- Avoids confusion when replication doesn’t work as expected. - Makes debugging easier by pointing out potential problems. I’d love to get feedback on whether this is a good idea and if I’ve approached it correctly. Since I’m still learning, any suggestions for improvement would be really helpful. I’ve attached the patch—please let me know what you think!
