Jevon Cowell wrote:

> What I'm seeing is that for the same query *and* query id,
> there are two rows with different statistics data *at the same time*. For
> example one row can have 2 calls while another can have 4

That looks normal. The unicity to expect is on 
(queryid, userid, dbid, toplevel).

From https://www.postgresql.org/docs/current/pgstatstatements.html :

  This view contains one row for each distinct combination of database
  ID, user ID, query ID and whether it's a top-level statement or not
  (up to the maximum number of distinct statements that the module can
  track)


Best regards,
-- 
Daniel Vérité 
https://postgresql.verite.pro/


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