I am trying to represent following IF THEN constraints:
#1 CONSTRAINT if display_on_rew = True then must have non null rew_geographies_id and non null mls_system #2 CONSTRAINT if display_on_rew = True and place_type_sid = 7 then must have non null polygon #3 CONSTRAINT if place_type_sid = 7 then must have non null city_region_code
into SQL code:
ALTER TABLE prod.place ADD CONSTRAINT place_constraint_disp_rew_geo_not_null CHECK ((NOT display_on_rew) OR (rew_geographies_id IS NOT NULL AND mls_system IS NOT NULL)); ALTER TABLE prod.place ADD CONSTRAINT place_constraint_disp_rew_polygon_not_null CHECK ((display_on_rew = TRUE AND place_type_sid = 7) AND (polygon IS NOT NULL)); ALTER TABLE prod.place ADD CONSTRAINT place_constraint_city_region_code_not_null CHECK (place_type_sid = 7 AND city_region_code IS NOT NULL);
I am not sure if my SQL-constraint logic represents my IF THEN check, can someone help me explain if my logical thinking is correct? OR if you have an alternate solution for doing it, that will be appreciated as well.
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