pg_bulkload Why can't I compile and install correctly in postgresql 11.9?

[snc-sqx]

Even if the compilation and installation passes, it will still report an error when using it, how can I solve this error? 你遇到的这个错误 “ERROR: relation ‘pgbulkload.pg_bulkload’ does not exist LINE 1: SELECT * FROM pgbulkload.pg_bulkload;” 表明在数据库中找不到名为 pgbulkload.pg_bulkload 的关系（这里的关系通常指表、视图等数据库对象）