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Hi, Is there something in the roadmap to optimize the inner join? I've this situation above. Table b has 400 rows with null in the column b. explain analyze select * from a inner join b on (b.b = a.a); "Merge Join (cost=0.55..65.30 rows=599 width=16) (actual time=0.030..1.173 rows=599 loops=1)" " Merge Cond: (a.a = b.b)" " -> Index Scan using a_pkey on a (cost=0.28..35.27 rows=1000 width=8) (actual time=0.014..0.364 rows=1000 loops=1)" " -> Index Scan using in01 on b (cost=0.28..33.27 rows=1000 width=8) (actual time=0.012..0.249 rows=600 loops=1)" "Total runtime: 1.248 ms" My question is: Why the planner isn't removing the null rows during the scan of table b? -- Clailson Soares Dinízio de Almeida |
