Mercurial > urweb
view demo/treeFun.urs @ 1394:d328983dc5a6
Allow subqueries to reference aggregate-only columns of free tables; treat non-COUNT aggregate functions as possibly returning NULL
author | Adam Chlipala <adam@chlipala.net> |
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date | Sat, 15 Jan 2011 14:53:13 -0500 |
parents | 311ca1ae715d |
children |
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functor Make(M : sig type key con id :: Name con parent :: Name con cols :: {Type} constraint [id] ~ [parent] constraint [id, parent] ~ cols val key_inj : sql_injectable_prim key table tab : ([id = key, parent = option key] ++ cols) end) : sig con id = M.id con parent = M.parent val tree : ($([id = M.key, parent = option M.key] ++ M.cols) -> xbody) -> option M.key -> transaction xbody end