Mercurial > urweb
view tests/policy2.ur @ 1918:c3c84fd38815
Postgres: remove DML error code logging and (hopefully) fix the real problem, not checking for concurrency faults on SELECTs
author | Adam Chlipala <adam@chlipala.net> |
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date | Fri, 29 Nov 2013 08:12:57 -0500 |
parents | d5ecceb7d1a1 |
children |
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type fruit = int table fruit : { Id : fruit, Nam : string, Weight : float, Secret : string } PRIMARY KEY Id, CONSTRAINT Nam UNIQUE Nam (* Everyone may knows IDs and names. *) policy sendClient (SELECT fruit.Id, fruit.Nam FROM fruit) (* The weight is sensitive information; you must know the secret. *) policy sendClient (SELECT fruit.Weight, fruit.Secret FROM fruit WHERE known(fruit.Secret)) fun main () = x1 <- queryX (SELECT fruit.Id, fruit.Nam FROM fruit WHERE fruit.Nam = "apple") (fn x => <xml><li>{[x.Fruit.Id]}: {[x.Fruit.Nam]}</li></xml>); return <xml><body> <ul>{x1}</ul> </body></xml>