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-rw-r--r--lib/ur/basis.urs11
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/ur/basis.urs b/lib/ur/basis.urs
index a81ba30a..a67d007a 100644
--- a/lib/ur/basis.urs
+++ b/lib/ur/basis.urs
@@ -235,6 +235,17 @@ val sql_inner_join : tabs1 ::: {{Type}} -> tabs2 ::: {{Type}}
-> sql_exp (tabs1 ++ tabs2) [] [] bool
-> sql_from_items (tabs1 ++ tabs2)
+class nullify :: Type -> Type -> Type
+val nullify_option : t ::: Type -> nullify (option t) (option t)
+val nullify_prim : t ::: Type -> sql_injectable_prim t -> nullify t (option t)
+
+val sql_left_join : tabs1 ::: {{Type}} -> tabs2 ::: {{(Type * Type)}}
+ -> [tabs1 ~ tabs2]
+ => $(map (fn r => $(map (fn p :: (Type * Type) => nullify p.1 p.2) r)) tabs2)
+ -> sql_from_items tabs1 -> sql_from_items (map (map (fn p :: (Type * Type) => p.1)) tabs2)
+ -> sql_exp (tabs1 ++ map (map (fn p :: (Type * Type) => p.1)) tabs2) [] [] bool
+ -> sql_from_items (tabs1 ++ map (map (fn p :: (Type * Type) => p.2)) tabs2)
+
val sql_query1 : tables ::: {{Type}}
-> grouped ::: {{Type}}
-> selectedFields ::: {{Type}}