SELECT DISTINCT isbn, CURRENT_TIMESTAMP, 1 FROM librosdisponibilidadtemp WHERE proceso = ai_proceso AND gen_isbn_pais(isbn) IN (SELECT pais FROM raizpaises) AND NOT EXISTS ( SELECT isbn FROM libros WHERE isbn = librosdisponibilidadtemp.isbn) AND NOT EXISTS ( SELECT isbn FROM isbns_a_descubrir WHERE isbn = librosdisponibilidadtemp.isbn);
and the plan execution is Unique (cost=133558107.45..133558128.13 rows=414 width=21) (actual time= 790552.899..790553.098 rows=9 loops=1) -> Sort (cost=133558107.45..133558112.62 rows=2068 width=21) (actual time=790552.882..790552.944 rows=9 loops=1) Sort Key: isbn, now(), 1 -> Index Scan using librosdisponibilidadtemp_idx_proceso on librosdisponibilidadtemp (cost= 1.01..133557993.56 rows=2068 width=21) (actual time=5722.607..790552.588 rows=9 loops=1) Index Cond: (proceso = 28465) Filter: ((hashed subplan) AND (NOT (subplan)) AND (NOT (subplan))) SubPlan -> Seq Scan on isbns_a_descubrir (cost=0.00..8067.91 rows=1 width=21) (actual time=30.044..30.044 rows=1 loops=2025) Filter: ((isbn)::bpchar = $1) -> Index Scan using "libros_idx_ISBN" on libros (cost=0.00..5.95 rows=1 width=21) (actual time=12.938..12.938 rows=1 loops=50512) Index Cond: (isbn = $1) -> Seq Scan on raizpaises (cost= 0.00..1.01 rows=1 width=10) (actual time=0.764..0.871 rows=1 loops=1) Total runtime: 790553.561 ms
The libros table has 1200000 regs. The isbns_a_descubrir table has 300000 regs. The librosdisponibilidadtemp table has 50000 regs.
does anybody can explain me, why using index ibrosdisponibilidadtemp_idx_proceso is so slow and the others conditions are good enough Thanks everybody
