graphql-engine/server/src-lib/Hasura/RQL/IR/Root.hs
Evie Ciobanu 4b0f5f09c9 server: add IR support for DB-to-DB joins
GJ IR changes cherry-picked from the original GJ branch. There is a separate (can be merged independently) PR for metadata changes (#1727) and there will be a different PR upcoming PR for execution changes.

https://github.com/hasura/graphql-engine-mono/pull/1810

Co-authored-by: Vamshi Surabhi <6562944+0x777@users.noreply.github.com>
GitOrigin-RevId: c31956af29dc9c9b75d002aba7d93c230697c5f4
2021-07-26 13:05:53 +00:00

86 lines
3.4 KiB
Haskell

module Hasura.RQL.IR.Root
( SourceConfigWith(..)
, RootField(..)
, MutationDB(..)
, ActionQuery(..)
, ActionMutation(..)
, QueryRootField
, MutationRootField
, SubscriptionRootField
, QueryDBRoot(..)
, MutationDBRoot(..)
) where
import Hasura.Prelude
import qualified Data.Aeson.Ordered as JO
import Data.Kind (Type)
import qualified Hasura.RQL.Types.Action as RQL
import qualified Hasura.RQL.Types.Backend as RQL
import qualified Hasura.RQL.Types.Common as RQL
import qualified Hasura.RQL.Types.RemoteSchema as RQL
import qualified Hasura.SQL.AnyBackend as AB
import Hasura.RQL.IR.Delete
import Hasura.RQL.IR.Insert
import Hasura.RQL.IR.Select
import Hasura.RQL.IR.Update
import Hasura.SQL.Backend
data SourceConfigWith (db :: BackendType -> Type) (b :: BackendType) =
SourceConfigWith (RQL.SourceConfig b) (db b)
data RootField (db :: BackendType -> Type) remote action raw where
RFDB
:: RQL.SourceName
-> AB.AnyBackend (SourceConfigWith db)
-> RootField db remote action raw
RFRemote :: remote -> RootField db remote action raw
RFAction :: action -> RootField db remote action raw
RFRaw :: raw -> RootField db remote action raw
data MutationDB (b :: BackendType) (r :: BackendType -> Type) v
= MDBInsert (AnnInsert b r v)
| MDBUpdate (AnnUpdG b r v)
| MDBDelete (AnnDelG b r v)
| MDBFunction RQL.JsonAggSelect (AnnSimpleSelectG b r v)
-- ^ This represents a VOLATILE function, and is AnnSimpleSelG for easy
-- re-use of non-VOLATILE function tracking code.
deriving stock (Generic, Functor, Foldable, Traversable)
data ActionQuery (b :: BackendType) (r :: BackendType -> Type) v
= AQQuery !(RQL.AnnActionExecution b r v)
| AQAsync !(RQL.AnnActionAsyncQuery b r v)
deriving (Functor, Foldable, Traversable)
data ActionMutation (b :: BackendType) (r :: BackendType -> Type) v
= AMSync !(RQL.AnnActionExecution b r v)
| AMAsync !RQL.AnnActionMutationAsync
deriving (Functor, Foldable, Traversable)
-- The `db` type argument of @RootField@ expects only one type argument, the backend `b`, as not all
-- types stored in a RootField will have a second parameter like @QueryDB@ does: they all only have
-- in common the fact that they're parametric over the backend. To define @QueryRootField@ in terms
-- of @QueryDB@ (and likewise for mutations), we need a type-level function `b -> QueryDB b (v
-- b)`. Sadly, neither type synonyms nor type families may be partially applied. Hence the need for
-- @QueryDBRoot@ and @MutationDBRoot@.
newtype QueryDBRoot r v b = QDBR (QueryDB b r (v b))
newtype MutationDBRoot r v b = MDBR (MutationDB b r (v b))
-- | Represents a query root field to an action
type QueryActionRoot v
= ActionQuery ('Postgres 'Vanilla) (RemoteSelect v) (v ('Postgres 'Vanilla))
-- | Represents a mutation root field to an action
type MutationActionRoot v
= ActionMutation ('Postgres 'Vanilla) (RemoteSelect v) (v ('Postgres 'Vanilla))
type QueryRootField v = RootField (QueryDBRoot (RemoteSelect v) v) RQL.RemoteField (QueryActionRoot v) JO.Value
type MutationRootField v = RootField (MutationDBRoot (RemoteSelect v) v) RQL.RemoteField (MutationActionRoot v) JO.Value
type SubscriptionRootField v = RootField (QueryDBRoot (RemoteSelect v) v) Void Void Void