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fcdd6689d0
For the same reasons given in commit 403ac226d, adjust these
functions to not assume that checking SearchSysCacheExists can
guarantee success of a later fetch.
This follows the same internal API choices made in the earlier commit:
add a function XXXExt(oid, is_missing) and use that to eliminate
the need for a separate existence check. The changes are very
straightforward, though tedious. For the moment I just made the new
functions static in namespace.c, but we could export them if a need
emerges.
Per bug #18014 from Alexander Lakhin. Given the lack of hard evidence
that there's a bug in non-debug builds, I'm content to fix this only
in HEAD.
Discussion: https://postgr.es/m/18014-28c81cb79d44295d@postgresql.org
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