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authorTom Lane <tgl@sss.pgh.pa.us>2022-10-17 11:35:23 -0400
committerTom Lane <tgl@sss.pgh.pa.us>2022-10-17 11:35:23 -0400
commit8c611602bd356cbb47c3ebe8614f958391ec92a8 (patch)
tree9f74e6ce92b5a3ac29837249ed17514d4ada4cb7 /src/backend/jit/llvm/llvmjit_inline.cpp
parent8122160ffb68acb0db740f4f6456fdaaaa577d90 (diff)
downloadpostgresql-8c611602bd356cbb47c3ebe8614f958391ec92a8.tar.gz
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Guard against table-AM-less relations in planner.
The executor will dump core if it's asked to execute a seqscan on a relation having no table AM, such as a view. While that shouldn't really happen, it's possible to get there via catalog corruption, such as a missing ON SELECT rule. It seems worth installing a defense against that. There are multiple plausible places for such a defense, but I picked the planner's get_relation_info(). Per discussion of bug #17646 from Kui Liu. Back-patch to v12 where the tableam APIs were introduced; in older versions you won't get a SIGSEGV, so it seems less pressing. Discussion: https://postgr.es/m/17646-70c93cfa40365776@postgresql.org
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