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4d2e37b3e6
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/5890 Co-authored-by: Vijay Prasanna <11921040+vijayprasanna13@users.noreply.github.com> GitOrigin-RevId: f6bd2ed5fe170bcce262564cf4f45c95c9bdff94
115 lines
4.0 KiB
Haskell
115 lines
4.0 KiB
Haskell
module Hasura.Backends.DataConnector.Adapter.RunSQL
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( DataConnectorRunSQL (..),
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runSQL,
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)
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where
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import Data.Aeson qualified as J
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import Data.HashMap.Strict qualified as H
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import Data.Text.Extended (ToTxt (..))
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import Hasura.Backends.DataConnector.API (RawRequest (..))
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import Hasura.Backends.DataConnector.API qualified as API
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import Hasura.Backends.DataConnector.Adapter.Types (DataConnectorName (), SourceConfig (..))
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import Hasura.Base.Error (Code (DataConnectorError), QErr (qeInternal), QErrExtra (ExtraInternal), err400)
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import Hasura.EncJSON (EncJSON, encJFromJValue)
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import Hasura.Prelude
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import Hasura.RQL.DDL.Schema (RunSQLRes (..))
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import Hasura.RQL.Types.Common (SourceName (), sourceNameToText)
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import Hasura.RQL.Types.SchemaCache (askSourceConfig)
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import Hasura.RQL.Types.SchemaCache.Build (CacheRWM, MetadataM)
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import Hasura.SQL.Backend (BackendType (DataConnector))
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import Servant.Client (mkClientEnv, runClientM, (//))
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import Servant.Client.Generic (genericClient)
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import Witch qualified
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data DataConnectorRunSQL = DataConnectorRunSQL
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{ _dcSource :: SourceName,
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_dcSql :: Text
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}
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deriving (Show, Eq)
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instance J.FromJSON DataConnectorRunSQL where
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parseJSON = J.withObject "DataConnectorRunSQL" $ \o -> do
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_dcSql <- o J..: "sql"
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_dcSource <- o J..: "source"
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do
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-- Throw errors on unsupported operations
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cascade <- o J..:? "cascade"
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when (cascade == Just True) do
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fail "Cascade not supported for raw data connector queries"
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readOnly <- o J..:? "read_only"
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when (readOnly == Just True) do
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fail "Read-only not supported for raw data connector queries"
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pure DataConnectorRunSQL {..}
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instance J.ToJSON DataConnectorRunSQL where
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toJSON DataConnectorRunSQL {..} =
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J.object
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[ "sql" J..= _dcSql
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]
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-- TODO:
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--
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-- This is defined in the same manner as runSQL variants for other existing backends.
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--
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-- The pattern used here should be improved since:
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-- * It is brittle: Not as type-safe as it could be
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-- * It is slow: Doesn't reuse schema-cache
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-- * It is verbose: Code duplication i.e. templates
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-- * It is incorrect: Uses runClientM directly without tracing capabilities
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--
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-- The intent is to refactor all usage of raw sql queries rather than try to fix everything
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-- in this PR.
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--
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runSQL ::
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forall m.
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(MonadIO m, CacheRWM m, MonadError QErr m, MetadataM m) =>
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DataConnectorName ->
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DataConnectorRunSQL ->
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m EncJSON
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runSQL methodConnectorName DataConnectorRunSQL {..} = do
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SourceConfig {..} <- askSourceConfig @'DataConnector _dcSource
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-- There is no way to know if the source prefix matches the backend type until we have `SourceConfig` available.
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unless (_scDataConnectorName == methodConnectorName) do
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throwError
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( err400
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DataConnectorError
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( "run_sql query referencing connector type " <> Witch.from methodConnectorName
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<> " not supported on source "
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<> sourceNameToText _dcSource
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<> " for data connector of type "
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<> Witch.from _scDataConnectorName
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)
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)
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let clientEnv = mkClientEnv _scManager _scEndpoint
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let client = (genericClient // API._raw) (toTxt _dcSource) _scConfig (RawRequest _dcSql)
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resultsE <- liftIO $ runClientM client clientEnv
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case tupleRows <$> resultsE of
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Left e ->
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throwError
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(err400 DataConnectorError "Error performing raw query to data connector")
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{ qeInternal = Just (ExtraInternal (J.String (tshow e)))
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}
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Right [] -> pure $ encJFromJValue $ RunSQLRes "CommandOk" J.Null
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Right results@(firstRow : _) ->
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let toRow = map snd
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toHeader = map $ J.String . fst
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in pure $ encJFromJValue $ RunSQLRes "TuplesOk" $ J.toJSON $ toHeader firstRow : map toRow results
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tupleRows :: API.RawResponse -> [[(Text, J.Value)]]
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tupleRows (API.RawResponse rs) = case rs of
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[] -> []
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xs@(x : _) ->
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let ks = H.keys x
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lookupKeys m = (\k -> maybe [] (pure . (k,)) $ H.lookup k m) =<< ks
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in map lookupKeys xs
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