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34 lines
1.1 KiB
Haskell
34 lines
1.1 KiB
Haskell
-- | Functions for fetching and updating @'Metadata' in the catalog.
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module Hasura.RQL.DDL.Schema.Catalog
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( fetchMetadataFromCatalog
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, setMetadataInCatalog
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) where
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import Hasura.Prelude
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import qualified Database.PG.Query as Q
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import Hasura.Backends.Postgres.Connection
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import Hasura.RQL.Types.Error
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import Hasura.RQL.Types.Metadata
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fetchMetadataFromCatalog :: Q.TxE QErr Metadata
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fetchMetadataFromCatalog = do
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rows <- Q.withQE defaultTxErrorHandler
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[Q.sql|
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SELECT metadata from hdb_catalog.hdb_metadata where id = 1
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|] () True
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case rows of
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[] -> pure emptyMetadata
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[(Identity (Q.AltJ metadata))] -> pure metadata
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_ -> throw500 "multiple rows in hdb_metadata table"
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setMetadataInCatalog :: Metadata -> Q.TxE QErr ()
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setMetadataInCatalog metadata =
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Q.unitQE defaultTxErrorHandler
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[Q.sql|
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INSERT INTO hdb_catalog.hdb_metadata
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(id, metadata) VALUES (1, $1::json)
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ON CONFLICT (id) DO UPDATE SET metadata = $1::json
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|] (Identity $ Q.AltJ metadata) True
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