On Tue, Aug 26, 2025 at 12:43 PM Dimitrios Apostolou <ji...@gmx.net> wrote:
> Could the > row-order have changed when doing COPY FROM with pg_restore? There is no reliable, meaningful, row ordering when it comes to the physical files. Sure, cluster does make an attempt, but it is quite limited in practice. > A *logical* dump of data shouldn't be affected by on-disk order. > Internal representation shouldn't affect the output. > The logical dump has no ordering - it will come out however it comes out. "COPY <table> TO ..." doesn't have an order by clause - there is no way to make or communicate to it that ordering is important. For adhoc work you can use "COPY <query> TO ..." and put and order by in the query. David J.
