Antoine Leblanc a978b6d683 Remove several outdated backend constraints ... ## Description This PR removes as many constraints as possible from Backend without refactoring the code. Thanks to #1844, a few ToJSON functions can be removed from the IR, and several constraints were simply redundant. This PR borrows from similar work done as part of #1666. ## Note To remove constraints more aggressively, I have explored the possibility of _removing Representable altogether_, in a [separate commit](https://github.com/hasura/graphql-engine-mono/compare/nicuveo/remove-extension-constraints..nicuveo/tentative-remove-representable). I am not convinced it's a good idea in terms of readability of the code, but it's a possibility. Further work includes deciding what we want to do with `Show` and `ToTxt`; see #1747. https://github.com/hasura/graphql-engine-mono/pull/1843 GitOrigin-RevId: 337324ad90cb8f86f06e1c5a36aa44bb414e195a		2021-07-27 13:52:20 +00:00
..
DDL	server: remove remnants of query plan caching (fix #1795)	2021-07-27 11:52:43 +00:00
DML	Clean metadata arguments	2021-07-27 10:42:51 +00:00
IR	Remove several outdated backend constraints	2021-07-27 13:52:20 +00:00
Types	Remove several outdated backend constraints	2021-07-27 13:52:20 +00:00
IR.hs	server: support remote relationships on SQL Server and BigQuery (#1497)	2021-06-11 03:27:39 +00:00
Types.hs	server: add metadata for DB-DB remote joins	2021-07-22 23:07:10 +00:00