What specific EXPLAIN ANALYZE metrics indicate that PostgreSQL needs a partial index or a covering index instead of a standard multi-column index?
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Fan-out diagram
The searches the AI actually ran for this prompt.
SEED QUERY
What specific EXPLAIN ANALYZE metrics indicate that PostgreSQL needs a partial index or a covering index instead of a standard multi-column index?
1 real search · 1 real-search pass
PostgreSQL documentation EXPLAIN ANALYZE buffers rows removed by filter index-only scans partial indexes INCLUDE visibility mapGoogle ↗
OBSERVEDInstruction
Badge and edge weight = share of passes that produced the query. Hover a query for its intent and routing format.
Query classes
Google's semantic query class for every sub-query: what kind of answer each search is after, simulated vs real.
ChatGPT real searches (1)
Classes come from the query-classifier (a local Laya model). 1 of 1 calls are low-confidence (under 50%) — hover a query in the table to see its confidence.
Searches and sources
ChatGPT1 real searches · gpt-6
PostgreSQL documentation EXPLAIN ANALYZE buffers rows removed by filter index-only scans partial indexes INCLUDE visibility map Google ↗
- PostgreSQL: Documentation: 14: 11.9. Index-Only Scans and Covering Indexes · postgresql.org
- PostgreSQL: Documentation: 18: 14.1. Using EXPLAIN · postgresql.org