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Commit bd8d9c9bdf widened MultiXactOffset to 64 bits, but
pg_control_checkpoint() still handle checkPointCopy.nextMultiOffset as
xid type and declared next_multi_offset column as xid. Since xid is 32
bits wide, an offset above 2^32 was reported truncated, while
pg_controldata printed the full value of the same field.
This commit reports the column as bigint instead. That matches
pg_get_multixact_stats(), which already reports num_members and
members_size, both derived from these same offsets, as int8.
Backpatch to v19, where MultiXactOffset was widened.
Bump catalog version.
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/CAD21AoCvzerscfU8o4ARQ793yAGHpQ72r2x5apeC_W2-k=SLCQ@mail.gmail.com
Backpatch-through: 19