[PATCH] Fix Potential Memory Leak in pg_amcheck Code

Dear pgsql-hackers, While reviewing the code of pg_amcheck, I discovered a potential issue that could lead to a memory leak. Specifically, there is a missing PQclear(result) call before the database connection is disconnected, which could leave the query result unfreed. To resolve this,

postgres_fdw has insufficient support for large object

PostgreSQL version:PostgreSQL 14.0 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-39), 64-bit Platform information:Linux version 3.10.0-1127.el7.x86_64 (mockbu...@kbuilder.bsys.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-39) (GCC) ) #1 SMP Tue Mar 31 23:36:51