SELECT c1, c2, c3, FROM T1, T2, T3 WHERE T1.x = T2.x AND T2.y=T3.y AND T1.x >= ? selectivity 0.00001 AND T2.y > ? selectivity 0.5 AND T3.z = ? selectivity 0.2 AND T3.w = ?
I need to implement Selectivity injection as shown in above query in PostgreSQL by which we can inject selectivity of each predicate or at least selectivity at relation level directly as part of query. Is there any on-going work on this front? If there is no ongoing work on this, How should I start implementing this feature?
