conn
is a pointer to the connection descriptor that a previous call to mi_open() or mi_server_connect() established.
LO_fd
is an LO file descriptor for the open smart large object whose value you want to truncate.
offset
is a pointer to the 8-byte integer (mi_int8) that identifies the offset at which the truncation of the smart large object begins.
Yes
MI_OK
The function was successful.
MI_ERROR
The function was not successful.