pg_repeater

PostgreSQL patch & extension for UTILITY queries and query plans execution at remote instance.

Plan is passed by postgres_fdw connection service. It executed by pg_exec_plan() routine, introduced by pg_execplan extension.

This project dedicated to query execution problem in DBMS for computing systems with cluster architecture.

The DBMS may need to execute an identical query plan at each computing node. Today PostgreSQL can process only SQL statements. But it is not guaranteed, that the planner at each node will construct same query plan, because different statistics, relation sizes e.t.c.

This solution based on postgres-xl approach: plan tree is serialized by the nodeToString() routine. During serialization we transform all database object identifiers (oid) at each node field to portable representation.