As far as I know, it is not implemented (and can't be implemented with the current virtual table module structure without "faking it"). But it is a feature I also wanted, to add such things like: ```c int(*xBlobOpen)(sqlite3_vtab*,int writeable,sqlite3_int64 rowid,int column,sqlite3_vblob**out,int*size); int(*xBlobClose)(sqlite3_vblob*); int(*xBlobRead)(sqlite3_vblob*,unsigned char*buf,int offset,int length); int(*xBlobWrite)(sqlite3_vblob*,const unsigned char*buf,int offset,int length); ```