We have some heavy queries that involve selecting records from a base cached table A (~100K records) that satisfy a quite a number of conditions expressed as
A.PK [NOT] IN (...) on a secondary cached table B (~10M) records. Although the subqueries use indexed columns the overall query is very slow. We are thinking of using a temporary memory table C that holds primary keys of table A, evaluating the subqueries on B seperately inserting or removing keys into table C as needed and finally having a single subquery A.PK NOT IN (SELECT FK_A FROM C) Has anoyone ever tried such an approach in H2? Is there any reason to expect an improvement in performance in comparison to the single large query we have now? -- You received this message because you are subscribed to the Google Groups "H2 Database" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/h2-database/6e7570af-a74c-4e83-9560-a85cfad1e8d4n%40googlegroups.com.
