> Attached is a draft patch along the lines I speculated about above. > It breaks backwards compatibility in that PreventInTransactionBlock > commands will now be rejected if they're a non-first command in a > pipeline. I think that's okay, and arguably desirable, for HEAD > but I'm pretty uncomfortable about back-patching it.
I attempted to run these using HEAD, and it fails: parse: create temporary table t1 (a int) on commit drop bind execute parse: analyze t1 bind execute parse: select * from t1 bind execute sync It then works fine after applying your patch! Just for some context, this was brought by Peter E. based on an issue reported by a customer. They are using PostgreSQL 11, and the issue was observed after upgrading to PostgreSQL 11.17, which includes the commit 9e3e1ac458abcda5aa03fa2a136e6fa492d58bd6. As a workaround they downgraded the binaries to 11.16. It would be great if we can back-patch this to all supported versions, as the issue itself is currently affecting them all. Regards, Israel.