Hi Japin, > When we write a extension using C language, we often add the dynamic library > into shared_preload_libraries, however, I found that the bloom, btree_gist and > btree_gin do not follow this rule. I'm a bit confused with this, could anybody > explain it for me?
In the general case, you don't need to modify shared_preload_libraries to use an extension, regardless of the language in which it's implemented. That's it. Some extensions may however require this. See the description of the GUC [1]. [1]: https://www.postgresql.org/docs/13/runtime-config-client.html#GUC-SHARED-PRELOAD-LIBRARIES -- Best regards, Aleksander Alekseev
