3c5a932010
Since UNIONs that would allow a column to be masked are rejected, there is no need to check that masking is performed since we will never get that far.
Note that if modifications are made to any of the t/*-files and the r/*-files are regenerated, the output MUST BE CHECKED MANUALLY to ensure that the produced result indeed is the expected. Otherwise the mysqltest-based tests effectively tests nothing.