hi.
seems no regress tests for pg_stat_progress_copy.tuples_skipped.
CopyFrom
pgstat_progress_update_param(PROGRESS_COPY_TUPLES_SKIPPED,
cstate->num_errors);
there is coverage for it. but in regress test, we didn't really print
out this value (cstate->num_errors)
The attached patch did minor changes on src/test/regress/sql/copy.sql.
so we can check if pgstat_progress_update_param(PROGRESS_COPY_TUPLES_SKIPPED..)
is working as intended or not.