1
0
mirror of https://github.com/hasura/graphql-engine.git synced 2024-12-17 20:41:49 +03:00
graphql-engine/server/src-lib/Hasura/Backends/MSSQL/DDL.hs
Evie Ciobanu 463a303390 server: add MSSQL module haddocks
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/3293
GitOrigin-RevId: 3062d5b1f41ce1fb18afc78773a2c947d8765309
2022-01-10 22:55:48 +00:00

110 lines
3.3 KiB
Haskell

-- | MSSQL DDL
--
-- Implements the DDL related methods of the
-- 'Hasura.RQL.Types.Metadata.Backend.BackendMetadata' type class
-- for the MSSQL backend, which provides an interface for fetching information about
-- the objects in the database, such as tables, relationships, etc.
--
-- The actual instance is defined in "Hasura.Backends.MSSQL.Instances.Metadata".
module Hasura.Backends.MSSQL.DDL
( buildComputedFieldInfo,
fetchAndValidateEnumValues,
buildFunctionInfo,
updateColumnInEventTrigger,
parseCollectableType,
module M,
)
where
import Data.Aeson
import Hasura.Backends.MSSQL.DDL.BoolExp as M
import Hasura.Backends.MSSQL.DDL.Source as M
import Hasura.Backends.MSSQL.Types.Internal qualified as MT
import Hasura.Base.Error
import Hasura.Prelude
import Hasura.RQL.IR.BoolExp
import Hasura.RQL.Types.Backend
import Hasura.RQL.Types.Column
import Hasura.RQL.Types.Common
import Hasura.RQL.Types.ComputedField
import Hasura.RQL.Types.EventTrigger
import Hasura.RQL.Types.Function
import Hasura.RQL.Types.SchemaCache
import Hasura.RQL.Types.Table
import Hasura.SQL.Backend
import Hasura.SQL.Types
import Hasura.Server.Utils
import Hasura.Session
buildComputedFieldInfo ::
(MonadError QErr m) =>
HashSet (TableName 'MSSQL) ->
TableName 'MSSQL ->
ComputedFieldName ->
ComputedFieldDefinition 'MSSQL ->
RawFunctionInfo 'MSSQL ->
Maybe Text ->
m (ComputedFieldInfo 'MSSQL)
buildComputedFieldInfo _ _ _ _ _ _ =
throw400 NotSupported "Computed fields aren't supported for MSSQL sources"
fetchAndValidateEnumValues ::
(Monad m) =>
SourceConfig 'MSSQL ->
TableName 'MSSQL ->
Maybe (PrimaryKey 'MSSQL (RawColumnInfo 'MSSQL)) ->
[RawColumnInfo 'MSSQL] ->
m (Either QErr EnumValues)
fetchAndValidateEnumValues _ _ _ _ =
runExceptT $
throw400 NotSupported "Enum tables are not supported for MSSQL sources"
buildFunctionInfo ::
(MonadError QErr m) =>
SourceName ->
FunctionName 'MSSQL ->
SystemDefined ->
FunctionConfig ->
FunctionPermissionsMap ->
RawFunctionInfo 'MSSQL ->
Maybe Text ->
m (FunctionInfo 'MSSQL, SchemaDependency)
buildFunctionInfo _ _ _ _ _ _ _ =
throw400 NotSupported "SQL Functions are not supported for MSSQL source"
updateColumnInEventTrigger ::
TableName 'MSSQL ->
Column 'MSSQL ->
Column 'MSSQL ->
TableName 'MSSQL ->
EventTriggerConf 'MSSQL ->
EventTriggerConf 'MSSQL
updateColumnInEventTrigger _ _ _ _ = id
parseCollectableType ::
(MonadError QErr m) =>
CollectableType (ColumnType 'MSSQL) ->
Value ->
m (PartialSQLExp 'MSSQL)
parseCollectableType collectableType = \case
String t
| isSessionVariable t -> pure $ mkTypedSessionVar collectableType $ mkSessionVariable t
| isReqUserId t -> pure $ mkTypedSessionVar collectableType userIdHeader
val -> case collectableType of
CollectableTypeScalar scalarType ->
PSESQLExp . MT.ValueExpression <$> parseScalarValueColumnType scalarType val
CollectableTypeArray _ ->
throw400 NotSupported "Array types are not supported in MSSQL backend"
mkTypedSessionVar ::
CollectableType (ColumnType 'MSSQL) ->
SessionVariable ->
PartialSQLExp 'MSSQL
mkTypedSessionVar columnType =
PSESessVar (msColumnTypeToScalarType <$> columnType)
msColumnTypeToScalarType :: ColumnType 'MSSQL -> ScalarType 'MSSQL
msColumnTypeToScalarType = \case
ColumnScalar scalarType -> scalarType
ColumnEnumReference _ -> MT.TextType