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Commit6c31ac0

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Process shared_preload_libraries in single-user mode.
Without processing shared_preload_libraries, it's impossible torecover if custom WAL resource managers are needed. It may also pose aproblem running VACUUM on a table with a custom AM, if the moduleimplementing the AM is expecting to be loaded byshared_preload_libraries.The reason this wasn't done before was just the general principle todo fewer things in single-user mode. But it's easy enough to just setshared_preload_libraries to empty, for the same effect.Discussion:https://postgr.es/m/9decc18a42634f8a2f15c97a385a0f51a752f396.camel%40j-davis.comReviewed-by: Tom Lane, Andres FreundBackpatch-through: 15
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‎src/backend/tcop/postgres.c

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@@ -3933,9 +3933,32 @@ PostgresSingleUserMain(int argc, char *argv[],
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/* read control file (error checking and contains config ) */
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LocalProcessControlFile(false);
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/*
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* process any libraries that should be preloaded at postmaster start
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*/
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process_shared_preload_libraries();
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/* Initialize MaxBackends */
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InitializeMaxBackends();
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/*
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* Give preloaded libraries a chance to request additional shared memory.
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*/
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process_shmem_requests();
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/*
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* Now that loadable modules have had their chance to request additional
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* shared memory, determine the value of any runtime-computed GUCs that
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* depend on the amount of shared memory required.
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*/
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InitializeShmemGUCs();
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/*
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* Now that modules have been loaded, we can process any custom resource
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* managers specified in the wal_consistency_checking GUC.
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*/
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InitializeWalConsistencyChecking();
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CreateSharedMemoryAndSemaphores();
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/*

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