$ oerr ora 12008
12008, 00000, "error in materialized view refresh path"
// *Cause:  Table SNAP$_<mview_name> reads rows from the view
//          MVIEW$_<mview_name>, which is a view on the master table
//          (the master may be at a remote site).  Any
//          error in this path will cause this error at refresh time.
//          For fast refreshes, the table <master_owner>.MLOG$_<master>
//          is also referenced.
// *Action: Examine the other messages on the stack to find the problem.
//          See if the objects SNAP$_<mview_name>, MVIEW$_<mview_name>,
//          <mowner>.<master>@<dblink>, <mowner>.MLOG$_<master>@<dblink>
//          still exist.

$ oerr ora 1422
01422, 00000, "exact fetch returns more than requested number of rows"
// *Cause: The number specified in exact fetch is less than the rows returned.
// *Action: Rewrite the query or change number of rows requested