diff --git a/src/PostgREST/App.hs b/src/PostgREST/App.hs
index a51004cf9..1741b2f6d 100644
--- a/src/PostgREST/App.hs
+++ b/src/PostgREST/App.hs
@@ -55,7 +55,7 @@ import           PostgREST.Auth (tokenJWT)
 import           Prelude
 
 app :: DbStructure -> AppConfig -> BL.ByteString -> Request -> H.Tx P.Postgres s Response
-app db conf reqBody req =
+app dbStructure conf reqBody req =
   case (path, verb) of
 
     ([table], "GET") ->
@@ -71,7 +71,7 @@ app db conf reqBody req =
                 to = frm+queryTotal-1
                 contentRange = contentRangeH frm to tableTotal
                 status = rangeStatus frm to tableTotal
-                canonical = urlEncodeVars -- should this be moved to the db (location)?
+                canonical = urlEncodeVars -- should this be moved to the dbStructure (location)?
                   . sortBy (comparing fst)
                   . map (join (***) cs)
                   . parseSimpleQuery
@@ -160,10 +160,10 @@ app db conf reqBody req =
       return $ responseLBS status404 [] ""
 
   where
-    allTabs = tables db
-    allRels = relations db
-    allCols = columns db
-    allPrKeys = primaryKeys db
+    allTabs = tables dbStructure
+    allRels = relations dbStructure
+    allCols = columns dbStructure
+    allPrKeys = primaryKeys dbStructure
     filterCol sc table (Column{colTable=Table{tableSchema=s, tableName=t}}) = s==sc && table==t
     filterCol _ _ _ =  False
     filterPk sc table pk = sc == (tableSchema . pkTable) pk && table == (tableName . pkTable) pk
diff --git a/src/PostgREST/DbStructure.hs b/src/PostgREST/DbStructure.hs
index 0798b1120..04aca3d97 100644
--- a/src/PostgREST/DbStructure.hs
+++ b/src/PostgREST/DbStructure.hs
@@ -4,7 +4,7 @@
 {-# LANGUAGE ScopedTypeVariables   #-}
 {-# LANGUAGE TypeSynonymInstances  #-}
 module PostgREST.DbStructure (
-  createDbStructure
+  getDbStructure
 , accessibleTables
 , doesProcExist
 , doesProcReturnJWT
@@ -26,15 +26,15 @@ import           PostgREST.Types
 import           GHC.Exts               (groupWith)
 import           Prelude
 
-createDbStructure :: Schema -> H.Tx P.Postgres s DbStructure
-createDbStructure schema = do
+getDbStructure :: Schema -> H.Tx P.Postgres s DbStructure
+getDbStructure schema = do
   tabs <- allTables
   cols <- allColumns tabs
   syns <- allSynonyms cols
   rels <- allRelations tabs cols
   keys <- allPrimaryKeys tabs
 
-  let rels' = (manyToManyRelations . raiseRelations schema syns . parentRelations . synonymousRelations syns) rels
+  let rels' = (addManyToManyRelations . raiseRelations schema syns . addParentRelations . addSynonymousRelations syns) rels
       cols' = addForeignKeys rels' cols
       keys' = synonymousPrimaryKeys syns keys
 
@@ -115,20 +115,20 @@ addForeignKeys rels = map addFk
         pos = elemIndex col cols
         colF = (colsF !!) <$> pos
 
-synonymousRelations :: [(Column,Column)] -> [Relation] -> [Relation]
-synonymousRelations _ [] = []
-synonymousRelations syns (rel:rels) = rel : synRelsP ++ synRelsF ++ synonymousRelations syns rels
+addSynonymousRelations :: [(Column,Column)] -> [Relation] -> [Relation]
+addSynonymousRelations _ [] = []
+addSynonymousRelations syns (rel:rels) = rel : synRelsP ++ synRelsF ++ addSynonymousRelations syns rels
   where
     synRelsP = synRels (relColumns rel) (\t cs -> rel{relTable=t,relColumns=cs})
     synRelsF = synRels (relFColumns rel) (\t cs -> rel{relFTable=t,relFColumns=cs})
     synRels cols mapFn = map (\cs -> mapFn (colTable $ head cs) cs) $ synonymousColumns syns cols
 
-parentRelations :: [Relation] -> [Relation]
-parentRelations [] = []
-parentRelations (rel@(Relation t c ft fc _ _ _ _):rels) = Relation ft fc t c Parent Nothing Nothing Nothing : rel : parentRelations rels
+addParentRelations :: [Relation] -> [Relation]
+addParentRelations [] = []
+addParentRelations (rel@(Relation t c ft fc _ _ _ _):rels) = Relation ft fc t c Parent Nothing Nothing Nothing : rel : addParentRelations rels
 
-manyToManyRelations :: [Relation] -> [Relation]
-manyToManyRelations rels = rels ++ mapMaybe link2Relation links
+addManyToManyRelations :: [Relation] -> [Relation]
+addManyToManyRelations rels = rels ++ mapMaybe link2Relation links
   where
     links = join $ map (combinations 2) $ filter (not . null) $ groupWith groupFn $ filter ( (==Child). relType) rels
     groupFn :: Relation -> Text
diff --git a/src/PostgREST/Main.hs b/src/PostgREST/Main.hs
index 948cb875f..4b12d07b8 100644
--- a/src/PostgREST/Main.hs
+++ b/src/PostgREST/Main.hs
@@ -68,11 +68,11 @@ main = do
     ) supportedOrError
 
   let txSettings = Just (H.ReadCommitted, Just True)
-  dbOrError <- H.session pool $ H.tx txSettings $ createDbStructure (cs $ configSchema conf)
-  db <- either hasqlError return dbOrError
+  dbOrError <- H.session pool $ H.tx txSettings $ getDbStructure (cs $ configSchema conf)
+  dbStructure <- either hasqlError return dbOrError
 
   runSettings appSettings $ middle $ \ req respond -> do
     body <- strictRequestBody req
     resOrError <- liftIO $ H.session pool $ H.tx txSettings $
-      runWithClaims conf (app db conf body) req
+      runWithClaims conf (app dbStructure conf body) req
     either (respond . errResponse) respond resOrError
diff --git a/test/SpecHelper.hs b/test/SpecHelper.hs
index 8a6f9dfe6..8971b606f 100644
--- a/test/SpecHelper.hs
+++ b/test/SpecHelper.hs
@@ -54,7 +54,7 @@ withApp perform = do
     <- H.acquirePool pgSettings testPoolOpts
 
   let txSettings = Just (H.ReadCommitted, Just True)
-  dbOrError <- H.session pool $ H.tx txSettings $ createDbStructure (cs $ configSchema cfg)
+  dbOrError <- H.session pool $ H.tx txSettings $ getDbStructure (cs $ configSchema cfg)
   db <- either (fail . show) return dbOrError
 
   perform $ middle $ \req resp -> do
@@ -119,7 +119,7 @@ clearProjectsTable :: IO ()
 clearProjectsTable = do
   pool <- testPool
   void . liftIO $ H.session pool $ H.tx Nothing $
-    H.unitEx $ B.Stmt ("delete from test.projects where id > 4") V.empty True
+    H.unitEx $ B.Stmt "delete from test.projects where id > 4" V.empty True
 
 
 createItems :: Int -> IO ()