Tomas Vondra <tomas.von...@enterprisedb.com> writes: > So here we go. The patch does a very simple thing - it uses TABLESAMPLE > to collect/transfer just a small sample from the remote node, saving > both CPU and network.
This is great if the remote end has TABLESAMPLE, but pre-9.5 servers
don't, and postgres_fdw is supposed to still work with old servers.
So you need some conditionality for that.
regards, tom lane
