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The pg_upgrade check for pg_catalog.line data type when upgrading from
9.3 had a couple of issues with domains and composite types. Firstly, it
triggered false positives for composite types unused in objects with
storage. This was enough to trigger an unnecessary pg_upgrade failure:
CREATE TYPE line_composite AS (l pg_catalog.line)
On the other hand, this only happened with composite types directly on
the pg_catalog.line data type, but not with a domain. So this was not
detected
CREATE DOMAIN line_domain AS pg_catalog.line;
CREATE TYPE line_composite_2 AS (l line_domain);
unlike the first example. These false positives and inconsistencies are
unfortunate, but what's worse we've failed to detected objects using the
pg_catalog.line data type through a domain. So we missed cases like this
CREATE TABLE t (l line_composite_2);
The consequence is clusters broken after a pg_upgrade.
This fixes these false positives and false negatives by using the same
recursive CTE introduced by
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