mirror of
https://github.com/hasura/graphql-engine.git
synced 2024-12-17 12:31:52 +03:00
567 lines
20 KiB
Haskell
567 lines
20 KiB
Haskell
{-# LANGUAGE TypeApplications #-}
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module Hasura.RQL.DDL.Schema.Table where
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import Hasura.EncJSON
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import Hasura.GraphQL.RemoteServer
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import Hasura.Prelude
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import Hasura.RQL.DDL.Deps
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import Hasura.RQL.DDL.Permission
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import Hasura.RQL.DDL.Permission.Internal
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import Hasura.RQL.DDL.QueryTemplate
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import Hasura.RQL.DDL.Relationship
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import Hasura.RQL.DDL.RemoteSchema
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import Hasura.RQL.DDL.Schema.Diff
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import Hasura.RQL.DDL.Schema.Function
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import Hasura.RQL.DDL.Schema.Rename
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import Hasura.RQL.DDL.Subscribe
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import Hasura.RQL.DDL.Utils
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import Hasura.RQL.Types
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import Hasura.Server.Utils (matchRegex)
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import Hasura.SQL.Types
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import qualified Database.PG.Query as Q
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import qualified Hasura.GraphQL.Schema as GS
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import Data.Aeson
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import Data.Aeson.Casing
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import Data.Aeson.TH
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import Instances.TH.Lift ()
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import Language.Haskell.TH.Syntax (Lift)
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import Network.URI.Extended ()
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import qualified Data.HashMap.Strict as M
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import qualified Data.Text as T
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import qualified Data.Text.Encoding as TE
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import qualified Database.PostgreSQL.LibPQ as PQ
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delTableFromCatalog :: QualifiedTable -> Q.Tx ()
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delTableFromCatalog (QualifiedObject sn tn) =
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Q.unitQ [Q.sql|
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DELETE FROM "hdb_catalog"."hdb_table"
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WHERE table_schema = $1 AND table_name = $2
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|] (sn, tn) False
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saveTableToCatalog :: QualifiedTable -> Q.Tx ()
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saveTableToCatalog (QualifiedObject sn tn) =
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Q.unitQ [Q.sql|
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INSERT INTO "hdb_catalog"."hdb_table" VALUES ($1, $2)
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|] (sn, tn) False
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-- Build the TableInfo with all its columns
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getTableInfo :: QualifiedTable -> Bool -> Q.TxE QErr TableInfo
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getTableInfo qt@(QualifiedObject sn tn) isSystemDefined = do
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tableData <- Q.catchE defaultTxErrorHandler $
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Q.listQ $(Q.sqlFromFile "src-rsr/table_info.sql")(sn, tn) True
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case tableData of
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[] -> throw400 NotExists $ "no such table/view exists in postgres : " <>> qt
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[(Q.AltJ cols, Q.AltJ pkeyCols, Q.AltJ cons, Q.AltJ viewInfoM)] ->
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return $ mkTableInfo qt isSystemDefined cons cols pkeyCols viewInfoM
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_ -> throw500 $ "more than one row found for: " <>> qt
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newtype TrackTable
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= TrackTable
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{ tName :: QualifiedTable }
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deriving (Show, Eq, FromJSON, ToJSON, Lift)
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trackExistingTableOrViewP1
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:: (CacheRM m, UserInfoM m, QErrM m) => TrackTable -> m ()
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trackExistingTableOrViewP1 (TrackTable vn) = do
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adminOnly
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rawSchemaCache <- askSchemaCache
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when (M.member vn $ scTables rawSchemaCache) $
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throw400 AlreadyTracked $ "view/table already tracked : " <>> vn
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trackExistingTableOrViewP2Setup
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:: (QErrM m, CacheRWM m, MonadTx m)
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=> QualifiedTable -> Bool -> m ()
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trackExistingTableOrViewP2Setup tn isSystemDefined = do
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ti <- liftTx $ getTableInfo tn isSystemDefined
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addTableToCache ti
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trackExistingTableOrViewP2
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:: (QErrM m, CacheRWM m, MonadTx m, MonadIO m, HasHttpManager m)
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=> QualifiedTable -> Bool -> m EncJSON
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trackExistingTableOrViewP2 vn isSystemDefined = do
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sc <- askSchemaCache
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let defGCtx = scDefaultRemoteGCtx sc
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tn = GS.qualObjectToName vn
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GS.checkConflictingNode defGCtx tn
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trackExistingTableOrViewP2Setup vn isSystemDefined
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liftTx $ Q.catchE defaultTxErrorHandler $
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saveTableToCatalog vn
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-- refresh the gCtx in schema cache
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refreshGCtxMapInSchema
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return successMsg
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runTrackTableQ
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:: ( QErrM m, CacheRWM m, MonadTx m
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, MonadIO m, HasHttpManager m, UserInfoM m
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)
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=> TrackTable -> m EncJSON
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runTrackTableQ q = do
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trackExistingTableOrViewP1 q
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trackExistingTableOrViewP2 (tName q) False
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purgeDep :: (CacheRWM m, MonadTx m)
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=> SchemaObjId -> m ()
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purgeDep schemaObjId = case schemaObjId of
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(SOTableObj tn (TOPerm rn pt)) -> do
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liftTx $ dropPermFromCatalog tn rn pt
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withPermType pt delPermFromCache rn tn
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(SOTableObj qt (TORel rn)) -> do
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liftTx $ delRelFromCatalog qt rn
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delRelFromCache rn qt
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(SOQTemplate qtn) -> do
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liftTx $ delQTemplateFromCatalog qtn
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delQTemplateFromCache qtn
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(SOFunction qf) -> do
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liftTx $ delFunctionFromCatalog qf
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delFunctionFromCache qf
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(SOTableObj qt (TOTrigger trn)) -> do
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liftTx $ delEventTriggerFromCatalog trn
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delEventTriggerFromCache qt trn
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_ -> throw500 $
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"unexpected dependent object : " <> reportSchemaObj schemaObjId
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processTableChanges :: (MonadTx m, CacheRWM m)
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=> TableInfo -> TableDiff -> m Bool
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processTableChanges ti tableDiff = do
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-- If table rename occurs then don't replace constraints and
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-- process dropped/added columns, because schema reload happens eventually
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sc <- askSchemaCache
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let tn = tiName ti
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withOldTabName = do
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-- replace constraints
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replaceConstraints tn
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-- for all the dropped columns
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procDroppedCols tn
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-- for all added columns
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procAddedCols tn
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-- for all altered columns
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procAlteredCols sc tn
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withNewTabName newTN = do
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let tnGQL = GS.qualObjectToName newTN
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defGCtx = scDefaultRemoteGCtx sc
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-- check for GraphQL schema conflicts on new name
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GS.checkConflictingNode defGCtx tnGQL
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void $ procAlteredCols sc tn
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-- update new table in catalog
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renameTableInCatalog newTN tn
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return True
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maybe withOldTabName withNewTabName mNewName
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where
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TableDiff mNewName droppedCols addedCols alteredCols _ constraints = tableDiff
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replaceConstraints tn = flip modTableInCache tn $ \tInfo ->
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return $ tInfo {tiUniqOrPrimConstraints = constraints}
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procDroppedCols tn =
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forM_ droppedCols $ \droppedCol ->
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-- Drop the column from the cache
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delColFromCache droppedCol tn
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procAddedCols tn =
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-- In the newly added columns check that there is no conflict with relationships
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forM_ addedCols $ \pci@(PGColInfo colName _ _) ->
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case M.lookup (fromPGCol colName) $ tiFieldInfoMap ti of
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Just (FIRelationship _) ->
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throw400 AlreadyExists $ "cannot add column " <> colName
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<<> " in table " <> tn <<>
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" as a relationship with the name already exists"
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_ -> addColToCache colName pci tn
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procAlteredCols sc tn = fmap or $
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forM alteredCols $ \(PGColInfo oColName oColTy _, PGColInfo nColName nColTy _) ->
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if | oColName /= nColName -> do
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renameColInCatalog oColName nColName tn ti
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return True
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| oColTy /= nColTy -> do
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let colId = SOTableObj tn $ TOCol oColName
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depObjs = getDependentObjsWith (== "on_type") sc colId
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unless (null depObjs) $ throw400 DependencyError $
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"cannot change type of column " <> oColName <<> " in table "
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<> tn <<> " because of the following dependencies : " <>
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reportSchemaObjs depObjs
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return False
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| otherwise -> return False
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delTableAndDirectDeps
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:: (QErrM m, CacheRWM m, MonadTx m) => QualifiedTable -> m ()
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delTableAndDirectDeps qtn@(QualifiedObject sn tn) = do
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liftTx $ Q.catchE defaultTxErrorHandler $ do
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Q.unitQ [Q.sql|
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DELETE FROM "hdb_catalog"."hdb_relationship"
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WHERE table_schema = $1 AND table_name = $2
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|] (sn, tn) False
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Q.unitQ [Q.sql|
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DELETE FROM "hdb_catalog"."hdb_permission"
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WHERE table_schema = $1 AND table_name = $2
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|] (sn, tn) False
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Q.unitQ [Q.sql|
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DELETE FROM "hdb_catalog"."event_triggers"
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WHERE schema_name = $1 AND table_name = $2
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|] (sn, tn) False
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delTableFromCatalog qtn
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delTableFromCache qtn
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processSchemaChanges :: (MonadTx m, CacheRWM m) => SchemaDiff -> m Bool
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processSchemaChanges schemaDiff = do
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-- Purge the dropped tables
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mapM_ delTableAndDirectDeps droppedTables
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sc <- askSchemaCache
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fmap or $ forM alteredTables $ \(oldQtn, tableDiff) -> do
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ti <- case M.lookup oldQtn $ scTables sc of
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Just ti -> return ti
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Nothing -> throw500 $ "old table metadata not found in cache : " <>> oldQtn
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processTableChanges ti tableDiff
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where
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SchemaDiff droppedTables alteredTables = schemaDiff
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data UntrackTable =
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UntrackTable
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{ utTable :: !QualifiedTable
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, utCascade :: !(Maybe Bool)
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} deriving (Show, Eq, Lift)
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$(deriveJSON (aesonDrop 2 snakeCase){omitNothingFields=True} ''UntrackTable)
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unTrackExistingTableOrViewP1
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:: (CacheRM m, UserInfoM m, QErrM m) => UntrackTable -> m ()
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unTrackExistingTableOrViewP1 (UntrackTable vn _) = do
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adminOnly
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rawSchemaCache <- askSchemaCache
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case M.lookup vn (scTables rawSchemaCache) of
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Just ti ->
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-- Check if table/view is system defined
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when (tiSystemDefined ti) $ throw400 NotSupported $
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vn <<> " is system defined, cannot untrack"
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Nothing -> throw400 AlreadyUntracked $
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"view/table already untracked : " <>> vn
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unTrackExistingTableOrViewP2
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:: (QErrM m, CacheRWM m, MonadTx m, MonadIO m, HasHttpManager m)
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=> UntrackTable -> m EncJSON
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unTrackExistingTableOrViewP2 (UntrackTable qtn cascade) = do
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sc <- askSchemaCache
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-- Get relational, query template and function dependants
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let allDeps = getDependentObjs sc (SOTable qtn)
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indirectDeps = filter (not . isDirectDep) allDeps
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-- Report bach with an error if cascade is not set
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when (indirectDeps /= [] && not (or cascade)) $ reportDepsExt indirectDeps []
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-- Purge all the dependants from state
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mapM_ purgeDep indirectDeps
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-- delete the table and its direct dependencies
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delTableAndDirectDeps qtn
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-- refresh the gctxmap in schema cache
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refreshGCtxMapInSchema
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return successMsg
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where
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isDirectDep = \case
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(SOTableObj dtn _) -> qtn == dtn
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_ -> False
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runUntrackTableQ
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:: ( QErrM m, CacheRWM m, MonadTx m
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, MonadIO m, HasHttpManager m, UserInfoM m
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)
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=> UntrackTable -> m EncJSON
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runUntrackTableQ q = do
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unTrackExistingTableOrViewP1 q
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unTrackExistingTableOrViewP2 q
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buildSchemaCache
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:: (MonadTx m, CacheRWM m, MonadIO m, HasHttpManager m, HasSQLGenCtx m)
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=> m ()
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buildSchemaCache = do
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-- clean hdb_views
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liftTx $ Q.catchE defaultTxErrorHandler clearHdbViews
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-- reset the current schemacache
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writeSchemaCache emptySchemaCache
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hMgr <- askHttpManager
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strfyNum <- stringifyNum <$> askSQLGenCtx
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tables <- liftTx $ Q.catchE defaultTxErrorHandler fetchTables
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forM_ tables $ \(sn, tn, isSystemDefined) ->
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modifyErr (\e -> "table " <> tn <<> "; " <> e) $
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trackExistingTableOrViewP2Setup (QualifiedObject sn tn) isSystemDefined
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-- Fetch all the relationships
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relationships <- liftTx $ Q.catchE defaultTxErrorHandler fetchRelationships
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forM_ relationships $ \(sn, tn, rn, rt, Q.AltJ rDef) -> do
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let qt = QualifiedObject sn tn
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modifyErr (\e -> "table " <> tn <<> "; rel " <> rn <<> "; " <> e) $ case rt of
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ObjRel -> do
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using <- decodeValue rDef
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let relDef = RelDef rn using Nothing
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validateObjRel qt relDef
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objRelP2Setup qt relDef
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ArrRel -> do
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using <- decodeValue rDef
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let relDef = RelDef rn using Nothing
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validateArrRel qt relDef
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arrRelP2Setup qt relDef
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-- Fetch all the permissions
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permissions <- liftTx $ Q.catchE defaultTxErrorHandler fetchPermissions
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forM_ permissions $ \(sn, tn, rn, pt, Q.AltJ pDef) ->
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modifyErr (\e -> "table " <> tn <<> "; role " <> rn <<> "; " <> e) $ case pt of
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PTInsert -> permHelper strfyNum sn tn rn pDef PAInsert
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PTSelect -> permHelper strfyNum sn tn rn pDef PASelect
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PTUpdate -> permHelper strfyNum sn tn rn pDef PAUpdate
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PTDelete -> permHelper strfyNum sn tn rn pDef PADelete
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-- Fetch all the query templates
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qtemplates <- liftTx $ Q.catchE defaultTxErrorHandler fetchQTemplates
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forM_ qtemplates $ \(qtn, Q.AltJ qtDefVal) -> do
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qtDef <- decodeValue qtDefVal
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qCtx <- mkAdminQCtx strfyNum <$> askSchemaCache
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(qti, deps) <- liftP1WithQCtx qCtx $ createQueryTemplateP1 $
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CreateQueryTemplate qtn qtDef Nothing
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addQTemplateToCache qti deps
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eventTriggers <- liftTx $ Q.catchE defaultTxErrorHandler fetchEventTriggers
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forM_ eventTriggers $ \(sn, tn, trid, trn, Q.AltJ configuration) -> do
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etc <- decodeValue configuration
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let qt = QualifiedObject sn tn
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subTableP2Setup qt trid etc
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allCols <- getCols . tiFieldInfoMap <$> askTabInfo qt
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liftTx $ mkTriggerQ trid trn qt allCols strfyNum (etcDefinition etc)
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functions <- liftTx $ Q.catchE defaultTxErrorHandler fetchFunctions
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forM_ functions $ \(sn, fn) ->
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modifyErr (\e -> "function " <> fn <<> "; " <> e) $
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trackFunctionP2Setup (QualifiedObject sn fn)
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-- remote schemas
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res <- liftTx fetchRemoteSchemas
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sc <- askSchemaCache
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gCtxMap <- GS.mkGCtxMap (scTables sc) (scFunctions sc)
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remoteScConf <- forM res $ \(AddRemoteSchemaQuery n def _) ->
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(,) n <$> validateRemoteSchemaDef def
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let rmScMap = M.fromList remoteScConf
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(mergedGCtxMap, defGCtx) <- mergeSchemas rmScMap gCtxMap hMgr
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writeRemoteSchemasToCache mergedGCtxMap rmScMap
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postMergeSc <- askSchemaCache
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writeSchemaCache postMergeSc { scDefaultRemoteGCtx = defGCtx }
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where
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permHelper strfyNum sn tn rn pDef pa = do
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qCtx <- mkAdminQCtx strfyNum <$> askSchemaCache
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perm <- decodeValue pDef
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let qt = QualifiedObject sn tn
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permDef = PermDef rn perm Nothing
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createPerm = WithTable qt permDef
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(permInfo, deps) <- liftP1WithQCtx qCtx $ createPermP1 createPerm
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addPermP2Setup qt permDef permInfo
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addPermToCache qt rn pa permInfo deps
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-- p2F qt rn p1Res
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fetchTables =
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Q.listQ [Q.sql|
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SELECT table_schema, table_name, is_system_defined
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FROM hdb_catalog.hdb_table
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|] () False
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fetchRelationships =
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Q.listQ [Q.sql|
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SELECT table_schema, table_name, rel_name, rel_type, rel_def::json
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FROM hdb_catalog.hdb_relationship
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|] () False
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fetchPermissions =
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Q.listQ [Q.sql|
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SELECT table_schema, table_name, role_name, perm_type, perm_def::json
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FROM hdb_catalog.hdb_permission
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|] () False
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fetchQTemplates =
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Q.listQ [Q.sql|
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SELECT template_name, template_defn :: json FROM hdb_catalog.hdb_query_template
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|] () False
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fetchEventTriggers =
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Q.listQ [Q.sql|
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SELECT e.schema_name, e.table_name, e.id, e.name, e.configuration::json
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FROM hdb_catalog.event_triggers e
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|] () False
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fetchFunctions =
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Q.listQ [Q.sql|
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SELECT function_schema, function_name
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FROM hdb_catalog.hdb_function
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|] () False
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data RunSQL
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= RunSQL
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{ rSql :: T.Text
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, rCascade :: !(Maybe Bool)
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, rCheckMetadataConsistency :: !(Maybe Bool)
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} deriving (Show, Eq, Lift)
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$(deriveJSON (aesonDrop 1 snakeCase){omitNothingFields=True} ''RunSQL)
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data RunSQLRes
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= RunSQLRes
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{ rrResultType :: !T.Text
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, rrResult :: !Value
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} deriving (Show, Eq)
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$(deriveJSON (aesonDrop 2 snakeCase){omitNothingFields=True} ''RunSQLRes)
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instance Q.FromRes RunSQLRes where
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fromRes (Q.ResultOkEmpty _) =
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return $ RunSQLRes "CommandOk" Null
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fromRes (Q.ResultOkData res) = do
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csvRows <- resToCSV res
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return $ RunSQLRes "TuplesOk" $ toJSON csvRows
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execRawSQL :: (MonadTx m) => T.Text -> m EncJSON
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execRawSQL =
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fmap (encJFromJValue @RunSQLRes) .
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liftTx . Q.multiQE rawSqlErrHandler . Q.fromText
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where
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rawSqlErrHandler txe =
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let e = err400 PostgresError "query execution failed"
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in e {qeInternal = Just $ toJSON txe}
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execWithMDCheck
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:: (QErrM m, CacheRWM m, MonadTx m, MonadIO m, HasHttpManager m, HasSQLGenCtx m)
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=> RunSQL -> m EncJSON
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execWithMDCheck (RunSQL t cascade _) = do
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-- Drop hdb_views so no interference is caused to the sql query
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liftTx $ Q.catchE defaultTxErrorHandler clearHdbViews
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-- Get the metadata before the sql query, everything, need to filter this
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oldMetaU <- liftTx $ Q.catchE defaultTxErrorHandler fetchTableMeta
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oldFuncMetaU <-
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liftTx $ Q.catchE defaultTxErrorHandler fetchFunctionMeta
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-- Run the SQL
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res <- execRawSQL t
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-- Get the metadata after the sql query
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newMeta <- liftTx $ Q.catchE defaultTxErrorHandler fetchTableMeta
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newFuncMeta <- liftTx $ Q.catchE defaultTxErrorHandler fetchFunctionMeta
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sc <- askSchemaCache
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let existingTables = M.keys $ scTables sc
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oldMeta = flip filter oldMetaU $ \tm -> tmTable tm `elem` existingTables
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schemaDiff = getSchemaDiff oldMeta newMeta
|
|
existingFuncs = M.keys $ scFunctions sc
|
|
oldFuncMeta = flip filter oldFuncMetaU $ \fm -> funcFromMeta fm `elem` existingFuncs
|
|
FunctionDiff droppedFuncs alteredFuncs = getFuncDiff oldFuncMeta newFuncMeta
|
|
overloadedFuncs = getOverloadedFuncs existingFuncs newFuncMeta
|
|
|
|
-- Do not allow overloading functions
|
|
unless (null overloadedFuncs) $
|
|
throw400 NotSupported $ "the following tracked function(s) cannot be overloaded: "
|
|
<> reportFuncs overloadedFuncs
|
|
|
|
indirectDeps <- getSchemaChangeDeps schemaDiff
|
|
|
|
-- Report back with an error if cascade is not set
|
|
when (indirectDeps /= [] && not (or cascade)) $ reportDepsExt indirectDeps []
|
|
|
|
-- Purge all the indirect dependents from state
|
|
mapM_ purgeDep indirectDeps
|
|
|
|
-- Purge all dropped functions
|
|
let purgedFuncs = flip mapMaybe indirectDeps $ \dep ->
|
|
case dep of
|
|
SOFunction qf -> Just qf
|
|
_ -> Nothing
|
|
|
|
forM_ (droppedFuncs \\ purgedFuncs) $ \qf -> do
|
|
liftTx $ delFunctionFromCatalog qf
|
|
delFunctionFromCache qf
|
|
|
|
-- Process altered functions
|
|
forM_ alteredFuncs $ \(qf, newTy) ->
|
|
when (newTy == FTVOLATILE) $
|
|
throw400 NotSupported $
|
|
"type of function " <> qf <<> " is altered to \"VOLATILE\" which is not supported now"
|
|
|
|
-- update the schema cache and hdb_catalog with the changes
|
|
reloadRequired <- processSchemaChanges schemaDiff
|
|
|
|
let withReload = buildSchemaCache
|
|
withoutReload = do
|
|
postSc <- askSchemaCache
|
|
-- recreate the insert permission infra
|
|
forM_ (M.elems $ scTables postSc) $ \ti -> do
|
|
let tn = tiName ti
|
|
forM_ (M.elems $ tiRolePermInfoMap ti) $ \rpi ->
|
|
maybe (return ()) (liftTx . buildInsInfra tn) $ _permIns rpi
|
|
|
|
strfyNum <- stringifyNum <$> askSQLGenCtx
|
|
--recreate triggers
|
|
forM_ (M.elems $ scTables postSc) $ \ti -> do
|
|
let tn = tiName ti
|
|
cols = getCols $ tiFieldInfoMap ti
|
|
forM_ (M.toList $ tiEventTriggerInfoMap ti) $ \(trn, eti) -> do
|
|
let opsDef = etiOpsDef eti
|
|
trid = etiId eti
|
|
liftTx $ mkTriggerQ trid trn tn cols strfyNum opsDef
|
|
|
|
bool withoutReload withReload reloadRequired
|
|
|
|
-- refresh the gCtxMap in schema cache
|
|
refreshGCtxMapInSchema
|
|
|
|
return res
|
|
where
|
|
reportFuncs = T.intercalate ", " . map dquoteTxt
|
|
|
|
isAltrDropReplace :: QErrM m => T.Text -> m Bool
|
|
isAltrDropReplace = either throwErr return . matchRegex regex False
|
|
where
|
|
throwErr s = throw500 $ "compiling regex failed: " <> T.pack s
|
|
regex = "alter|drop|replace|create function"
|
|
|
|
runRunSQL
|
|
:: (QErrM m, UserInfoM m, CacheRWM m, MonadTx m, MonadIO m, HasHttpManager m, HasSQLGenCtx m)
|
|
=> RunSQL -> m EncJSON
|
|
runRunSQL q@(RunSQL t _ mChkMDCnstcy) = do
|
|
adminOnly
|
|
isMDChkNeeded <- maybe (isAltrDropReplace t) return mChkMDCnstcy
|
|
bool (execRawSQL t) (execWithMDCheck q) isMDChkNeeded
|
|
|
|
-- Should be used only after checking the status
|
|
resToCSV :: PQ.Result -> ExceptT T.Text IO [[T.Text]]
|
|
resToCSV r = do
|
|
nr <- liftIO $ PQ.ntuples r
|
|
nc <- liftIO $ PQ.nfields r
|
|
|
|
hdr <- forM [0..pred nc] $ \ic -> do
|
|
colNameBS <- liftIO $ PQ.fname r ic
|
|
maybe (return "unknown") decodeBS colNameBS
|
|
|
|
rows <- forM [0..pred nr] $ \ir ->
|
|
forM [0..pred nc] $ \ic -> do
|
|
cellValBS <- liftIO $ PQ.getvalue r ir ic
|
|
maybe (return "NULL") decodeBS cellValBS
|
|
|
|
return $ hdr:rows
|
|
|
|
where
|
|
decodeBS = either (throwError . T.pack . show) return . TE.decodeUtf8'
|