The following bug has been logged on the website:
Bug reference: 18536
Logged by: Alexander Lakhin
Email address: exclusion(at)gmail(dot)com
PostgreSQL version: 17beta2
Operating system: Ubuntu 22.04
Description:
The following query:
WITH RECURSIVE t(n) AS (
WITH t1 AS (SELECT 1 FROM t) SELECT 1
UNION
SELECT 1 FROM t1)
SELECT * FROM t;
triggers an error:
ERROR: XX000: missing recursive reference
LOCATION: checkWellFormedRecursion, parse_cte.c:896
which is seemingly not expected:
if (cstate->selfrefcount != 1) /* shouldn't happen */
elog(ERROR, "missing recursive reference");