Show query plans for both situatios fk an index.
Regards,Karol Bieniaszewski -------- Oryginalna wiadomość --------Od: "[email protected] [firebird-support]" <[email protected]> Data: 24.02.2018 11:40 (GMT+01:00) Do: [email protected] Temat: [firebird-support] Foreign Key & Query Performance Hello there,I am having a doubt that if Foreign Key reduces Query Performance Or not. My Environment is FirebirdCS2.6 :-Item Table :- 10 Records, PK - Itemcode Varchar(5);BillDetail Table :- 10 Million Records (FK Selectivity - 0.0076, PK Selectivity - 0.000000076) I am having FK between BillDetail.Itemcode And Item.Itemcode with FK every query is slow. but as i remove the FK and added Index with Itemcode&BillDetail_PK the queries are running lightning fast. But I prefer FK to be in Database with high performance queries. Kindly share you suggestions and Feedbacks on the same.
