queryX

2 files changed, 14 insertions, 0 deletions

diff --git a/lib/top.ur b/lib/top.ur
index af009242..7c18da21 100644
--- a/lib/top.ur
+++ b/lib/top.ur
@@ -26,3 +26,11 @@ fun foldTRX2 (tf1 :: Type -> Type) (tf2 :: Type -> Type) (ctx :: {Unit})
                         [[nm] ~ rest] =>
                         fn r1 r2 acc => <xml>{f [nm] [t] [rest] r1 r2}{acc}</xml>)
                 <xml></xml>
+
+fun queryX (tables ::: {{Type}}) (exps ::: {Type}) (ctx ::: {Unit}) (q : sql_query tables exps) =
+        [tables ~ exps] =>
+        fn (f : $(exps ++ fold (fn nm (fields :: {Type}) acc => [nm] ~ acc => [nm = $fields] ++ acc) [] tables)
+                -> xml ctx [] []) =>
+        query q
+                (fn fs acc => return <xml>{acc}{f fs}</xml>)
+                <xml></xml>
diff --git a/lib/top.urs b/lib/top.urs
index 0e211373..b124caa2 100644
--- a/lib/top.urs
+++ b/lib/top.urs
@@ -19,3 +19,9 @@ val foldTRX2 : tf1 :: (Type -> Type) -> tf2 :: (Type -> Type) -> ctx :: {Unit}
         -> (nm :: Name -> t :: Type -> rest :: {Type} -> [nm] ~ rest
                 -> tf1 t -> tf2 t -> xml ctx [] [])
         -> r :: {Type} -> $(mapTT tf1 r) -> $(mapTT tf2 r) -> xml ctx [] []
+
+val queryX : tables ::: {{Type}} -> exps ::: {Type} -> ctx ::: {Unit}
+        -> sql_query tables exps -> tables ~ exps
+        -> ($(exps ++ fold (fn nm (fields :: {Type}) acc => [nm] ~ acc => [nm = $fields] ++ acc) [] tables)
+                -> xml ctx [] [])
+        -> transaction (xml ctx [] [])