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PostgreSQL: why does an extra WHERE clause make an index-only scan slow?

By ExtraProxies | Buy Fast Private Proxies | Comments are Closed | 16 November, 2017 | 0

I have a query that is being made 18x slower by the presence of a single WHERE clause. The query plan is an index-only scan and the clause in question looks at one of the fields in the index. This is the query and the offending clause is update_id < 40581: EXPLAIN (VERBOSE, ANALYZE, COSTS,Read more

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PostgreSQL: why does an extra WHERE clause make an index-only scan slow?

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