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13fc1c62d1
This is a first step towards clarifying the role of `UnpreparedValue` as part of the IR. It certainly does not belong in the parser framework. PR-URL: https://github.com/hasura/graphql-engine-mono/pull/4588 GitOrigin-RevId: d1582a0b266729b79e00d31057178a4099168e6d
60 lines
1.6 KiB
Haskell
60 lines
1.6 KiB
Haskell
{-# LANGUAGE UndecidableInstances #-}
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module Hasura.RQL.IR.Value
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( UnpreparedValue (..),
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ValueWithOrigin (..),
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openValueOrigin,
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mkParameter,
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)
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where
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import Hasura.GraphQL.Parser.Schema (VariableInfo)
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import Hasura.Prelude
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import Hasura.RQL.Types.Backend
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import Hasura.RQL.Types.Column
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import Hasura.SQL.Backend
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import Hasura.Session (SessionVariable)
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data UnpreparedValue (b :: BackendType)
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= -- | A SQL value that can be parameterized over.
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UVParameter
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(Maybe VariableInfo)
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-- ^ The GraphQL variable this value came from, if any.
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(ColumnValue b)
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| -- | A literal SQL expression that /cannot/ be parameterized over.
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UVLiteral (SQLExpression b)
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| -- | The entire session variables JSON object.
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UVSession
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| -- | A single session variable.
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UVSessionVar (SessionVarType b) SessionVariable
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deriving instance
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( Backend b,
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Eq (ColumnValue b),
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Eq (ScalarValue b)
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) =>
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Eq (UnpreparedValue b)
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deriving instance
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( Backend b,
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Show (ColumnValue b),
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Show (ScalarValue b)
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) =>
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Show (UnpreparedValue b)
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-- | This indicates whether a variable value came from a certain GraphQL variable
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data ValueWithOrigin a
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= ValueWithOrigin VariableInfo a
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| ValueNoOrigin a
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deriving (Functor)
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openValueOrigin :: ValueWithOrigin a -> a
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openValueOrigin (ValueWithOrigin _ a) = a
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openValueOrigin (ValueNoOrigin a) = a
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mkParameter :: ValueWithOrigin (ColumnValue b) -> UnpreparedValue b
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mkParameter (ValueWithOrigin valInfo columnValue) =
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UVParameter (Just valInfo) columnValue
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mkParameter (ValueNoOrigin columnValue) =
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UVParameter Nothing columnValue
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