mirror of
https://github.com/hasura/graphql-engine.git
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34c2fb2b66
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/3393 GitOrigin-RevId: b45cd83f7c3fbc1656011ee888968743b0bbb736
368 lines
13 KiB
Haskell
368 lines
13 KiB
Haskell
module Hasura.RQL.DML.Select
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( runSelect,
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)
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where
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import Control.Monad.Trans.Control (MonadBaseControl)
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import Data.HashMap.Strict qualified as HM
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import Data.List.NonEmpty qualified as NE
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import Data.Sequence qualified as DS
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import Data.Text.Extended
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import Database.PG.Query qualified as Q
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import Hasura.Backends.Postgres.SQL.DML qualified as S
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import Hasura.Backends.Postgres.SQL.Types hiding (TableName)
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import Hasura.Backends.Postgres.Translate.Select
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import Hasura.Base.Error
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import Hasura.EncJSON
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import Hasura.Prelude
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import Hasura.RQL.DML.Internal
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import Hasura.RQL.DML.Types
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import Hasura.RQL.IR.OrderBy
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import Hasura.RQL.IR.Select
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import Hasura.RQL.Types
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import Hasura.SQL.Types
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import Hasura.Session
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import Hasura.Tracing qualified as Tracing
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type SelectQExt b = SelectG (ExtCol b) (BoolExp b) Int
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-- Columns in RQL
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-- This technically doesn't need to be generalized to all backends as
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-- it is specific to this module; however the generalization work was
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-- already done, and there's no particular reason to force this to be
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-- specific.
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data ExtCol (b :: BackendType)
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= ECSimple !(Column b)
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| ECRel !RelName !(Maybe RelName) !(SelectQExt b)
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convSelCol ::
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(UserInfoM m, QErrM m, TableInfoRM ('Postgres 'Vanilla) m) =>
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FieldInfoMap (FieldInfo ('Postgres 'Vanilla)) ->
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SelPermInfo ('Postgres 'Vanilla) ->
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SelCol ->
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m [ExtCol ('Postgres 'Vanilla)]
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convSelCol _ _ (SCExtSimple cn) =
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pure [ECSimple cn]
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convSelCol fieldInfoMap _ (SCExtRel rn malias selQ) = do
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-- Point to the name key
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let pgWhenRelErr = "only relationships can be expanded"
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relInfo <-
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withPathK "name" $
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askRelType fieldInfoMap rn pgWhenRelErr
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let (RelInfo _ _ _ relTab _ _) = relInfo
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(rfim, rspi) <- fetchRelDet rn relTab
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resolvedSelQ <- resolveStar rfim rspi selQ
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pure [ECRel rn malias resolvedSelQ]
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convSelCol fieldInfoMap spi (SCStar wildcard) =
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convWildcard fieldInfoMap spi wildcard
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convWildcard ::
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(UserInfoM m, QErrM m, TableInfoRM ('Postgres 'Vanilla) m) =>
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FieldInfoMap (FieldInfo ('Postgres 'Vanilla)) ->
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SelPermInfo ('Postgres 'Vanilla) ->
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Wildcard ->
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m [ExtCol ('Postgres 'Vanilla)]
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convWildcard fieldInfoMap selPermInfo wildcard =
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case wildcard of
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Star -> pure simpleCols
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(StarDot wc) -> (simpleCols ++) <$> (catMaybes <$> relExtCols wc)
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where
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cols = spiCols selPermInfo
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pgCols = map ciColumn $ getCols fieldInfoMap
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relColInfos = getRels fieldInfoMap
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simpleCols = map ECSimple $ filter (`HM.member` cols) pgCols
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mkRelCol wc relInfo = do
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let relName = riName relInfo
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relTab = riRTable relInfo
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relTabInfo <- fetchRelTabInfo relTab
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mRelSelPerm <- askPermInfo' PASelect relTabInfo
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forM mRelSelPerm $ \relSelPermInfo -> do
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rExtCols <- convWildcard (_tciFieldInfoMap $ _tiCoreInfo relTabInfo) relSelPermInfo wc
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pure $
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ECRel relName Nothing $
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SelectG rExtCols Nothing Nothing Nothing Nothing
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relExtCols wc = mapM (mkRelCol wc) relColInfos
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resolveStar ::
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(UserInfoM m, QErrM m, TableInfoRM ('Postgres 'Vanilla) m) =>
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FieldInfoMap (FieldInfo ('Postgres 'Vanilla)) ->
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SelPermInfo ('Postgres 'Vanilla) ->
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SelectQ ->
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m (SelectQExt ('Postgres 'Vanilla))
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resolveStar fim selPermInfo (SelectG selCols mWh mOb mLt mOf) = do
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procOverrides <- fmap (concat . catMaybes) $
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withPathK "columns" $
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indexedForM selCols $ \selCol -> case selCol of
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(SCStar _) -> pure Nothing
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_ -> Just <$> convSelCol fim selPermInfo selCol
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everything <- case wildcards of
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[] -> pure []
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_ -> convWildcard fim selPermInfo $ maximum wildcards
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let extCols = unionBy equals procOverrides everything
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pure $ SelectG extCols mWh mOb mLt mOf
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where
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wildcards = lefts $ map mkEither selCols
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mkEither (SCStar wc) = Left wc
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mkEither selCol = Right selCol
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equals (ECSimple x) (ECSimple y) = x == y
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equals (ECRel x _ _) (ECRel y _ _) = x == y
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equals _ _ = False
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convOrderByElem ::
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(UserInfoM m, QErrM m, TableInfoRM ('Postgres 'Vanilla) m) =>
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SessionVariableBuilder ('Postgres 'Vanilla) m ->
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(FieldInfoMap (FieldInfo ('Postgres 'Vanilla)), SelPermInfo ('Postgres 'Vanilla)) ->
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OrderByCol ->
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m (AnnotatedOrderByElement ('Postgres 'Vanilla) S.SQLExp)
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convOrderByElem sessVarBldr (flds, spi) = \case
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OCPG fldName -> do
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fldInfo <- askFieldInfo flds fldName
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case fldInfo of
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FIColumn colInfo -> do
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checkSelOnCol spi (ciColumn colInfo)
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let ty = ciType colInfo
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if isScalarColumnWhere isGeoType ty
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then
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throw400 UnexpectedPayload $
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mconcat
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[ fldName <<> " has type 'geometry'",
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" and cannot be used in order_by"
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]
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else pure $ AOCColumn colInfo
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FIRelationship _ ->
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throw400 UnexpectedPayload $
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mconcat
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[ fldName <<> " is a",
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" relationship and should be expanded"
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]
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FIComputedField _ ->
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throw400 UnexpectedPayload $
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mconcat
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[ fldName <<> " is a",
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" computed field and can't be used in 'order_by'"
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]
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-- TODO Rakesh (from master)
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FIRemoteRelationship {} ->
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throw400 UnexpectedPayload (mconcat [fldName <<> " is a remote field"])
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OCRel fldName rest -> do
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fldInfo <- askFieldInfo flds fldName
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case fldInfo of
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FIColumn _ ->
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throw400 UnexpectedPayload $
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mconcat
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[ fldName <<> " is a Postgres column",
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" and cannot be chained further"
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]
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FIComputedField _ ->
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throw400 UnexpectedPayload $
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mconcat
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[ fldName <<> " is a",
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" computed field and can't be used in 'order_by'"
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]
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FIRelationship relInfo -> do
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when (riType relInfo == ArrRel) $
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throw400 UnexpectedPayload $
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mconcat
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[ fldName <<> " is an array relationship",
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" and can't be used in 'order_by'"
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]
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(relFim, relSelPermInfo) <- fetchRelDet (riName relInfo) (riRTable relInfo)
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resolvedSelFltr <- convAnnBoolExpPartialSQL sessVarBldr $ spiFilter relSelPermInfo
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AOCObjectRelation relInfo resolvedSelFltr <$> convOrderByElem sessVarBldr (relFim, relSelPermInfo) rest
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FIRemoteRelationship {} ->
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throw400 UnexpectedPayload (mconcat [fldName <<> " is a remote field"])
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convSelectQ ::
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( UserInfoM m,
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QErrM m,
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TableInfoRM ('Postgres 'Vanilla) m,
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HasServerConfigCtx m
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) =>
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TableName ('Postgres 'Vanilla) ->
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FieldInfoMap (FieldInfo ('Postgres 'Vanilla)) -> -- Table information of current table
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SelPermInfo ('Postgres 'Vanilla) -> -- Additional select permission info
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SelectQExt ('Postgres 'Vanilla) -> -- Given Select Query
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SessionVariableBuilder ('Postgres 'Vanilla) m ->
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ValueParser ('Postgres 'Vanilla) m S.SQLExp ->
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m (AnnSimpleSelect ('Postgres 'Vanilla))
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convSelectQ table fieldInfoMap selPermInfo selQ sessVarBldr prepValBldr = do
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-- Convert where clause
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wClause <- forM (sqWhere selQ) $ \boolExp ->
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withPathK "where" $
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convBoolExp fieldInfoMap selPermInfo boolExp sessVarBldr table prepValBldr
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annFlds <- withPathK "columns" $
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indexedForM (sqColumns selQ) $ \case
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(ECSimple pgCol) -> do
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(colInfo, caseBoolExpMaybe) <- convExtSimple fieldInfoMap selPermInfo pgCol
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resolvedCaseBoolExp <-
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traverse (convAnnColumnCaseBoolExpPartialSQL sessVarBldr) caseBoolExpMaybe
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pure (fromCol @('Postgres 'Vanilla) pgCol, mkAnnColumnField (ciColumn colInfo) (ciType colInfo) resolvedCaseBoolExp Nothing)
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(ECRel relName mAlias relSelQ) -> do
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annRel <-
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convExtRel
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fieldInfoMap
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relName
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mAlias
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relSelQ
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sessVarBldr
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prepValBldr
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pure
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( fromRel $ fromMaybe relName mAlias,
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either AFObjectRelation AFArrayRelation annRel
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)
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annOrdByML <- forM (sqOrderBy selQ) $ \(OrderByExp obItems) ->
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withPathK "order_by" $
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indexedForM obItems $
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mapM $
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convOrderByElem sessVarBldr (fieldInfoMap, selPermInfo)
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let annOrdByM = NE.nonEmpty =<< annOrdByML
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-- validate limit and offset values
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withPathK "limit" $ mapM_ onlyPositiveInt mQueryLimit
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withPathK "offset" $ mapM_ onlyPositiveInt mQueryOffset
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resolvedSelFltr <-
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convAnnBoolExpPartialSQL sessVarBldr $
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spiFilter selPermInfo
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let tabFrom = FromTable table
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tabPerm = TablePerm resolvedSelFltr mPermLimit
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tabArgs = SelectArgs wClause annOrdByM mQueryLimit (fromIntegral <$> mQueryOffset) Nothing
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strfyNum <- stringifyNum . _sccSQLGenCtx <$> askServerConfigCtx
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pure $ AnnSelectG annFlds tabFrom tabPerm tabArgs strfyNum
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where
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mQueryOffset = sqOffset selQ
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mQueryLimit = sqLimit selQ
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mPermLimit = spiLimit selPermInfo
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convExtSimple ::
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(UserInfoM m, QErrM m) =>
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FieldInfoMap (FieldInfo ('Postgres 'Vanilla)) ->
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SelPermInfo ('Postgres 'Vanilla) ->
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PGCol ->
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m (ColumnInfo ('Postgres 'Vanilla), Maybe (AnnColumnCaseBoolExpPartialSQL ('Postgres 'Vanilla)))
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convExtSimple fieldInfoMap selPermInfo pgCol = do
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checkSelOnCol selPermInfo pgCol
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colInfo <- askColInfo fieldInfoMap pgCol relWhenPGErr
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pure (colInfo, join $ HM.lookup pgCol (spiCols selPermInfo))
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where
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relWhenPGErr = "relationships have to be expanded"
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convExtRel ::
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( UserInfoM m,
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QErrM m,
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TableInfoRM ('Postgres 'Vanilla) m,
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HasServerConfigCtx m
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) =>
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FieldInfoMap (FieldInfo ('Postgres 'Vanilla)) ->
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RelName ->
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Maybe RelName ->
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SelectQExt ('Postgres 'Vanilla) ->
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SessionVariableBuilder ('Postgres 'Vanilla) m ->
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ValueParser ('Postgres 'Vanilla) m S.SQLExp ->
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m (Either (ObjectRelationSelect ('Postgres 'Vanilla)) (ArraySelect ('Postgres 'Vanilla)))
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convExtRel fieldInfoMap relName mAlias selQ sessVarBldr prepValBldr = do
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-- Point to the name key
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relInfo <-
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withPathK "name" $
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askRelType fieldInfoMap relName pgWhenRelErr
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let (RelInfo _ relTy colMapping relTab _ _) = relInfo
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(relCIM, relSPI) <- fetchRelDet relName relTab
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annSel <- convSelectQ relTab relCIM relSPI selQ sessVarBldr prepValBldr
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case relTy of
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ObjRel -> do
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when misused $ throw400 UnexpectedPayload objRelMisuseMsg
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pure $
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Left $
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AnnRelationSelectG (fromMaybe relName mAlias) colMapping $
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AnnObjectSelectG (_asnFields annSel) relTab $ _tpFilter $ _asnPerm annSel
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ArrRel ->
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pure $
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Right $
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ASSimple $
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AnnRelationSelectG
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(fromMaybe relName mAlias)
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colMapping
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annSel
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where
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pgWhenRelErr = "only relationships can be expanded"
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misused =
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or
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[ isJust (sqWhere selQ),
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isJust (sqLimit selQ),
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isJust (sqOffset selQ),
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isJust (sqOrderBy selQ)
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]
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objRelMisuseMsg =
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mconcat
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[ "when selecting an 'obj_relationship' ",
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"'where', 'order_by', 'limit' and 'offset' ",
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" can't be used"
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]
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convSelectQuery ::
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( UserInfoM m,
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QErrM m,
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TableInfoRM ('Postgres 'Vanilla) m,
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HasServerConfigCtx m
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) =>
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SessionVariableBuilder ('Postgres 'Vanilla) m ->
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ValueParser ('Postgres 'Vanilla) m S.SQLExp ->
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SelectQuery ->
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m (AnnSimpleSelect ('Postgres 'Vanilla))
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convSelectQuery sessVarBldr prepArgBuilder (DMLQuery _ qt selQ) = do
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tabInfo <- withPathK "table" $ askTabInfoSource qt
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selPermInfo <- askSelPermInfo tabInfo
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let fieldInfo = _tciFieldInfoMap $ _tiCoreInfo tabInfo
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extSelQ <- resolveStar fieldInfo selPermInfo selQ
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validateHeaders $ spiRequiredHeaders selPermInfo
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convSelectQ qt fieldInfo selPermInfo extSelQ sessVarBldr prepArgBuilder
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selectP2 :: JsonAggSelect -> (AnnSimpleSelect ('Postgres 'Vanilla), DS.Seq Q.PrepArg) -> Q.TxE QErr EncJSON
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selectP2 jsonAggSelect (sel, p) =
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encJFromBS . runIdentity . Q.getRow
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<$> Q.rawQE dmlTxErrorHandler (Q.fromBuilder selectSQL) (toList p) True
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where
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selectSQL = toSQL $ mkSQLSelect jsonAggSelect sel
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phaseOne ::
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(QErrM m, UserInfoM m, CacheRM m, HasServerConfigCtx m) =>
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SelectQuery ->
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m (AnnSimpleSelect ('Postgres 'Vanilla), DS.Seq Q.PrepArg)
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phaseOne query = do
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let sourceName = getSourceDMLQuery query
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tableCache :: TableCache ('Postgres 'Vanilla) <- askTableCache sourceName
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flip runTableCacheRT (sourceName, tableCache) $
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runDMLP1T $
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convSelectQuery sessVarFromCurrentSetting (valueParserWithCollectableType binRHSBuilder) query
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phaseTwo :: (MonadTx m) => (AnnSimpleSelect ('Postgres 'Vanilla), DS.Seq Q.PrepArg) -> m EncJSON
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phaseTwo =
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liftTx . selectP2 JASMultipleRows
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runSelect ::
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( QErrM m,
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UserInfoM m,
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CacheRM m,
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HasServerConfigCtx m,
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MonadIO m,
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MonadBaseControl IO m,
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Tracing.MonadTrace m,
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MetadataM m
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) =>
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SelectQuery ->
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m EncJSON
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runSelect q = do
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sourceConfig <- askSourceConfig @('Postgres 'Vanilla) (getSourceDMLQuery q)
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phaseOne q >>= runTxWithCtx (_pscExecCtx sourceConfig) Q.ReadOnly . phaseTwo
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