I was told by colleague A that a database table would be helpful to me, but a field name and its comment in it were not that self-explanatory and detailed and I cannot get to know how the values of that column were derived, then I asked the person A what that field is. But A told me that he didn't need that field and didn't know either and referred me to B who created the table. I asked B if he had written some documentation or codebook about the table, and since B is a middle-level manager he just referred me to one of his subordinates C. Unfortunately I found that C is also a manager, and unsurprisingly he referred me to one of his subordinates D. I asked D the same question but to my surprise D was just a new hire and let me turn to his teammate E. E told me that he didn't know briefly.
What is such a phenomenon in a company? How can I deal with that?