Hi there, I'm trying to write an extension to study the internals of Postgresql, and I face a server crash after calling the function relation_open.
I want to call the function ReadBufferExtended to get the raw data of a given buffer and I've read in some examples that I need to call relation_open first, in order to get a Relation variable and also lock the relation. The function relation_open returns a non NULL pointer in my extension, but then the last line in the following snippet crashes postgres. Relation rel; rel = relation_open(relid, AccessShareLock); Assert(rel != NULL); Assert(rel->rd_rel != NULL); Assert(rel->rd_id != NULL); elog(INFO, "rel->rd_id not null"); Oid rd_id = rel->rd_id; Could somebody please help me understand what I'm doing wrong? (Sorry if this is not the correct mailing list)
