On Wed, Sep 11, 2019 at 06:30:22PM +0200, Julien Rouhaud wrote: > The thing is that pg_stat_statements assigns a 0 queryid in the > post_parse_analyze_hook to recognize utility statements and avoid > tracking instrumentation twice in case of utility statements, and then > compute a queryid base on a hash of the query text. Maybe we could > instead fully reserve queryid "2" for utility statements (so forcing > queryid "1" for standard queries if jumbling returns 0 *or* 2 instead > of only 0), and use "2" as the identifier for utility statement > instead of "0"?
Hmm. Not sure. At this stage it would be nice to gather more input on the matter, and FWIW, I don't like much the assumption that a query ID of 0 is perhaps a utility statement, or perhaps nothing depending on the state of a backend entry, or even perhaps something else depending how on how modules make use and define such query IDs. -- Michael
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