David Overton 346804fc67 Support nested object fields in DC API and use this to implement nest… ... ## Description This change adds support for nested object fields in HGE IR and Schema Cache, the Data Connectors backend and API, and the MongoDB agent. ### Data Connector API changes - The `/schema` endpoint response now includes an optional set of GraphQL type definitions. Table column types can refer to these definitions by name. - Queries can now include a new field type `object` which contains a column name and a nested query. This allows querying into a nested object within a field. ### MongoDB agent changes - Add support for querying into nested documents using the new `object` field type. ### HGE changes - The `Backend` type class has a new type family `XNestedObjects b` which controls whether or not a backend supports querying into nested objects. This is currently enabled only for the `DataConnector` backend. - For backends that support nested objects, the `FieldInfo` type gets a new constructor `FINestedObject`, and the `AnnFieldG` type gets a new constructor `AFNestedObject`. - If the DC `/schema` endpoint returns any custom GraphQL type definitions they are stored in the `TableInfo` for each table in the source. - During schema cache building, the function `addNonColumnFields` will check whether any column types match custom GraphQL object types stored in the `TableInfo`. If so, they are converted into `FINestedObject` instead of `FIColumn` in the `FieldInfoMap`. - When building the `FieldParser`s from `FieldInfo` (function `fieldSelection`) any `FINestedObject` fields are converted into nested object parsers returning `AFNestedObject`. - The `DataConnector` query planner converts `AFNestedObject` fields into `object` field types in the query sent to the agent. ## Limitations ### HGE not yet implemented: - Support for nested arrays - Support for nested objects/arrays in mutations - Support for nested objects/arrays in order-by - Support for filters (`where`) in nested objects/arrays - Support for adding custom GraphQL types via track table metadata API - Support for interface and union types - Tests for nested objects ### Mongo agent not yet implemented: - Generate nested object types from validation schema - Support for aggregates - Support for order-by - Configure agent port - Build agent in CI - Agent tests for nested objects and MongoDB agent PR-URL: https://github.com/hasura/graphql-engine-mono/pull/7844 GitOrigin-RevId: aec9ec1e4216293286a68f9b1af6f3f5317db423		2023-04-11 01:30:37 +00:00
..
Backends	Support nested object fields in DC API and use this to implement nest…	2023-04-11 01:30:37 +00:00
Base/Error	server: Remove QErr and Code dependencies from the schema parsers.	2022-07-27 12:26:44 +00:00
Generator	Eliminate Template Haskell from Hasura.RQL.Types.Common	2023-02-06 22:03:02 +00:00
GraphQL	feature(server): custom return types as discreet metadata entity	2023-03-30 15:15:11 +00:00
Metadata/DTO	server: codecs for backend configs	2023-03-30 15:53:55 +00:00
QuickCheck	ghc 9.2.5	2022-11-15 11:26:42 +00:00
RQL	chore(server): move user-defined-functions into Hasura.Function.*	2023-04-03 10:20:20 +00:00
Server	server: move apollo-federation to GA	2023-03-15 08:15:51 +00:00
SQL	server: codecs for backend configs	2023-03-30 15:53:55 +00:00
Tracing	server: support 128-bit trace ids	2022-09-20 02:50:06 +00:00
AppSpec.hs	multitenant: make shutdown logic more abstract	2022-11-23 07:53:19 +00:00
EncJSONSpec.hs	[server] Fix CockroachDB live queries	2022-11-02 11:41:02 +00:00
EventingSpec.hs	Remove RQL/Types.hs	2022-04-27 13:58:47 +00:00
SessionSpec.hs	server: Splits QuickCheck extension and orphan instance modules	2022-02-22 15:33:37 +00:00