Hi, On Mon, Dec 04, 2023 at 06:45:39AM -0800, Jerry Brenner wrote: > We are currently on Postgres 13.9 (and will be moving to later releases). > We are capturing json explain plans and storing them in a database table. > We can tell that there are different plans for some queries, but that's a > very labor intensive process - we'd rather do this using SQL and comparing > consistent hash values for the plans. Both Oracle and SQL Server have > consistent hash values for query plans and that makes it easy to identify > when there are multiple plans for the same query. Does that concept exist > in later releases of Postgres (and is the value stored in the json explain > plan)? > > While we have a pretty good idea of how to manually generate a consistent > value, we don't want to reinvent the wheel. Is anyone aware of an existing > solution that can be called from SQL/jsonb? You can look at pg_store_plans extension: https://github.com/ossc-db/pg_store_plans, it can generate a query plan hash and also keeps tracks of the (normalized) plans associated to each (normalized) query.
