This PR expands the OpenAPI specification generated for metadata to include separate definitions for `SourceMetadata` for each native database type, and for DataConnector.
For the most part the changes add `HasCodec` implementations, and don't modify existing code otherwise.
The generated OpenAPI spec can be used to generate TypeScript definitions that distinguish different source metadata types based on the value of the `kind` properly. There is a problem: because the specified `kind` value for a data connector source is any string, when TypeScript gets a source with a `kind` value of, say, `"postgres"`, it cannot unambiguously determine whether the source is postgres, or a data connector. For example,
```ts
function consumeSourceMetadata(source: SourceMetadata) {
if (source.kind === "postgres" || source.kind === "pg") {
// At this point TypeScript infers that `source` is either an instance
// of `PostgresSourceMetadata`, or `DataconnectorSourceMetadata`. It
// can't narrow further.
source
}
if (source.kind === "something else") {
// TypeScript infers that this `source` must be an instance of
// `DataconnectorSourceMetadata` because `source.kind` does not match
// any of the other options.
source
}
}
```
The simplest way I can think of to fix this would be to add a boolean property to the `SourceMetadata` type along the lines of `isNative` or `isDataConnector`. This could be a field that only exists in serialized data, like the metadata version field. The combination of one of the native database names for `kind`, and a true value for `isNative` would be enough for TypeScript to unambiguously distinguish the source kinds.
But note that in the current state TypeScript is able to reference the short `"pg"` name correctly!
~~Tests are not passing yet due to some discrepancies in DTO serialization vs existing Metadata serialization. I'm working on that.~~
The placeholders that I used for table and function metadata are not compatible with the ordered JSON serialization in use. I think the best solution is to write compatible codecs for those types in another PR. For now I have disabled some DTO tests for this PR.
Here are the generated [OpenAPI spec](https://github.com/hasura/graphql-engine-mono/files/9397333/openapi.tar.gz) based on these changes, and the generated [TypeScript client code](https://github.com/hasura/graphql-engine-mono/files/9397339/client-typescript.tar.gz) based on that spec.
Ticket: [MM-66](https://hasurahq.atlassian.net/browse/MM-66)
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/5582
GitOrigin-RevId: e1446191c6c832879db04f129daa397a3be03f62
### Description
This PR adds a new benchmarl set named `deep_schema`, that is made to replicate one very specific edge-case: schemas that have deeply nested remote relationships. Our schema-building code is, in essence, "depth-first", and there are a lot of subtleties in the way we jump across remote relationship boundaries: this set will allows us to better understand the performance implications of technical decisions we make wrt. schema building.
This set, unlike others, does not declare any query: we are, for now, only interested in the schema building, which is tested with an ad-hoc script.
## Remaining work
There are several points worth discussing, wrt. this PR:
- should we make the schema larger, to make measures more consistent?
- should we extend this idea of measuring schema build performance to other sets?
- how do we extend the report to include this new information?
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/5517
GitOrigin-RevId: 9d8f4fddb9bbdca5ef85f3d22337b992acf13bce
This does not yet enable Aggregation Predicates to users, but enables building the execution backend and tests of the schema.
This is a prerequisite for:
* #5174
* #5261
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/5607
GitOrigin-RevId: e07beb01949724545131629c111d41a7ec4636f2
We plan on creating the source database dynamically, in the test setup.
This means that (a) we cannot assume that the metadata database and the
source database are the same, and (b) we need to drop and re-add the
source in code, not in YAML.
This changeset prepares the code for the introduction of a separate
source database, but doesn't go there yet. The separation is already
done but is too big to review in one go, so I have split this out.
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/5508
GitOrigin-RevId: b497a83ac4a100371762c2515c87ee3760d8d4ab
This splits two naming convention tests into four classes (and four YAML
files), which might seem overkill, but allows us to provision sources
declaratively in the future. As each class will require a custom source
configuration, we are able to annotate them accordingly, which means the
test cases are decoupled from the source database URL, letting us
generate a new database for each test case and automatically add it as a
source to HGE.
The future changes are already prepared, but this has been extracted out
as it splits the YAML files, which is a large change best reviewed in
isolation.
The test case `test_type_and_field_names` has been split into:
* `TestNamingConventionsTypeAndFieldNamesGraphqlDefault`
* `TestNamingConventionsTypeAndFieldNamesHasuraDefault`
The test case `test_type_and_field_names_with_prefix_and_suffix` has
been split into:
* `TestNamingConventionsTypeAndFieldNamesGraphqlDefaultWithPrefixAndSuffix`
* `TestNamingConventionsTypeAndFieldNamesHasuraDefaultWithPrefixAndSuffix`
The YAML files have been split in the same way. This was fairly trivial
as each test case would add a source, run some tests with
the `graphql_default` naming convention, drop the source, and then
repeat for the `hasura_default` naming convention. I simply split the
file in two. There is a little bit of duplication for provisioning the
various database tables, which I think is worth it.
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/5496
GitOrigin-RevId: 94825e755c427a5414230f69985b534991b3aad6
This means that if `remote_schemas/nodejs/package.json` changes, the
dependencies will be automatically reinstalled.
It also moves `package-lock.json` to the correct location (in the
directory in which we run `npm install`), and updates it.
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/5481
GitOrigin-RevId: f3fb431afd19de150f39ec2e4cb6572b896c870f
Making it easier to inject different ones later.
I also included a change to _.prettierignore_ so Visual Studio Code doesn't keep trying to reformat the JavaScript or YAML files in `server/tests-py`, as it can cause diffs to balloon for no obvious benefit.
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/5456
GitOrigin-RevId: bc6d548708160a328e1e61a00e19be8e124da025
Let's put it in one place.
This is a precursor to moving database provisioning into the Python
integration tests.
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/5453
GitOrigin-RevId: 5920b0b1177d94496485fcb4e178b946534ee4eb
This makes it easier to refactor `BackendSchema`, because if the type of a type class method is changed, it's easier to update the corresponding dummy implementations.
Partially addresses hasura/graphql-engine-mono#2971, in the sense that this aids refactors.
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/5443
GitOrigin-RevId: 65e169d01415a04e7c419a628cf32e743448543d
The module `Hasura.SQL.AnyBackend` was introduced (in #751) to centralize the logic for case-switching behavior that depends on the particular flavor of relational DB backend (Postgres vs MSSQL vs BigQuery vs MySQL vs DataConnectors). This allows us to write a bunch of code in a backend-agnostic way, even if runtime behavior does depend on the chosen backend. At the same time, it allows us to write backend-specific code without having to care (too much) about the existence of other backends.
In #851 this module was rewritten to use Template Haskell.
I've heard that one of the reasons for the use of TH was that this would make it easier to keep backends out of the compilation product entirely. This would allow customers, especially on OSS, to benefit from simpler software licensing.
However:
1. This conditional compilation never materialized.
2. It's not clear whether writing this particular module based on TH would be sufficient for conditional compilation. And in any case, it can be done using CPP pragmas as well.
3. The TH code is extraordinarily complex. Since its introduction, it has been documented extraordinarily well, but it's still very difficult to maintain and/or refactor, due to its non-idiomatic nature.
4. Hasura's company objectives are now Cloud-oriented, so that software licensing issues work differently, and in particular, do not depend on what's part of the compilation product.
So this PR reverts on #851 by spelling out the code generated by TH. This is a net-negative diff size. IOW we used to generate less code than the size of the code doing the generating. This makes the code readable and maintainable.
The generated code has been modified in one way, which I'll now describe.
In the scenario that support for a new backend is introduced, a constructor is added to the `BackendType` type. This would then cause `liftTag` to be partial, thus raising a compiler warning. Resolving this requires adding corresponding constructors to the `BackendTag` and `AnyBackend` types. This would then require amending **almost** all other methods.
The exceptions are `composeAnyBackend` and `unpackAnyBackend`. These methods test whether two values are compatible, i.e. belong to the same backend. Both have a default case that in one way or another ignores the input values. Using TH here ensures that all values that belong together are caught. But after spelling out the TH, the presence of the default case means that no compiler warning is thrown for a missing match of matching values. So in the default case, we now do an explicit check for equality. If there _is_ an equality, that means that there is a missing `case`. So this is reported as an `error` (which is very crude, but it should be).
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/5333
GitOrigin-RevId: 5aaf0a93394bd740aa7371526d3175c8142b3541
### Description
This PR moves some strictness annotations to a concrete use site, rather than putting `seq` in an helper function.
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/5436
GitOrigin-RevId: 1f279e05333ab80167ad2e18d09b8792eddc52c3
### Description
This PR is a first step towards having a dedicated reader context per schema block. It adds the required Reader instance, and switches from a `SchemaT ReaderT` stack to a `ReaderT SchemaT` stack. Furthermore, it cleans up / harmonizes some of the top-level schema building functions.
Sources and remotes are now built each within their own run of `runReaderT`: for now, the reader context is the same in both cases, meaning no special care is required at the boundary of remote relationships.
Actions are explicitly run with the source context for now; we could envision creating a third and distinct context for them.
This PR is expected to be a no-op.
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/5300
GitOrigin-RevId: a014e5b3504eb4ef740c820d305d6d2695f622f7
It's about time.
To do this I had to check a few more boxes.
* I copied the flags from `graphql-engine.cabal` to the libraries in `server/lib`.
* I moved `Cacheable` instances of schema parser types beside the typeclass declaration.
* I removed imports of `Hasura.Prelude` from the tests, and rewrote them accordingly.
* I copied the `TestMonad` parse monad into `server/src-test/Hasura/GraphQL/Schema/RemoteTest.hs`, which was using it. I think this could be done with the real thing, but I tried replacing it with constraints and it messed with my head somewhat.
PR-URL: https://github.com/hasura/graphql-engine-mono/pull/5311
GitOrigin-RevId: ebebcc50a16f2d517b7f730fe72410827ca3e86c
