<para>

As a rule of thumb, an assumption of the stability or comparability

of <structfield>querid</> values should be predicated on the the

of <structfield>queryid</> values should be predicated on the the

underlying catalog metadata and hash function implementation

details exactly matching. Any two servers participating in any

variety of replication based on physical WAL-replay can be expected

to have identical <structfield>querid</> values for the same query.

to have identical <structfield>queryid</> values for the same query.

Logical replication schemes do not have replicas comparable in all

relevant regards, and so <structfield>querid</> will not be a

relevant regards, and so <structfield>queryid</> will not be a

useful identifier for accumulating costs for the entire replica

set. If in doubt, direct testing is recommended.

</para>