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-rw-r--r--contrib/pg_upgrade/function.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/contrib/pg_upgrade/function.c b/contrib/pg_upgrade/function.c
index e38071ed95f..afa75431253 100644
--- a/contrib/pg_upgrade/function.c
+++ b/contrib/pg_upgrade/function.c
@@ -142,7 +142,12 @@ get_loadable_libraries(void)
DbInfo *active_db = &old_cluster.dbarr.dbs[dbnum];
PGconn *conn = connectToServer(&old_cluster, active_db->db_name);
- /* Fetch all libraries referenced in this DB */
+ /*
+ * Fetch all libraries referenced in this DB. We can't exclude
+ * the "pg_catalog" schema because, while such functions are not
+ * explicitly dumped by pg_dump, they do reference implicit objects
+ * that pg_dump does dump, e.g. creation of the plperl language.
+ */
ress[dbnum] = executeQueryOrDie(conn,
"SELECT DISTINCT probin "
"FROM pg_catalog.pg_proc "