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dd1192ca2c
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4 Commits

Author SHA1 Message Date
Antoine Leblanc
dd1192ca2c server: cleanup of language extensions [gardening] 
GitOrigin-RevId: d862c724715cb8a4c2f37d2e0e525d12c46b18eb
 2021-04-16 06:55:56 +00:00
Antoine Leblanc
b7e964952f server: move backendTag to its own class. 
GitOrigin-RevId: 4d22215611079f01c5f31ab3adc996ec7e5e390e
 2021-03-19 11:00:37 +00:00
Antoine Leblanc
405b29c82d server: generate backend-related code with TemplateHaskell 
GitOrigin-RevId: 251b8dbeb5181e42cca0369abf54bfc2179ad3d8
 2021-03-18 20:35:23 +00:00
Vladimir Ciobanu
da8f6981d4 server: reduce the number of backend dispatches 
Fixes https://github.com/hasura/graphql-engine-mono/issues/712

Main point of interest: the `Hasura.SQL.Backend` module.

This PR creates an `Exists` type indexed by indexed type and packed constraint while hiding all of its complexity by not exporting the constructor.

Existential constructors/types which are no longer (directly) existential:
- [X] BackendSourceInfo :: BackendSourceInfo
- [x] BackendSourceMetadata :: BackendSourceMetadata
- [x] MOSourceObjId :: MetadatObjId
- [x] SOSourceObj :: SchemaObjId
- [x] RFDB :: RootField
- [x] LQP :: LiveQueryPlan
- [x] ExecutionStep :: ExecStepDB

This PR also removes ALL usages of `Typeable.cast` from our codebase. We still need to derive `Typeable` in a few places in order to be able to derive `Data` in one place. I have not dug deeper to see why this is needed.

GitOrigin-RevId: bb47e957192e4bb0af4c4116aee7bb92f7983445
 2021-03-15 13:03:55 +00:00