Problem with queriying for kind 'Order' (undocumented reserved word?)

[trollkotze]

Environment details

• OS: Ubuntu 16.04
• Node.js version: v7.8.0
• npm version: yarn 0.23.4
• google-cloud-node version: @google-cloud/datastore 1.03

Steps to reproduce

Preparation:
Create an entity, or some more, with kind "Order" and some well-defined properties.
Create an index with a selection of the existing properties for doing a projection query.

a)
Run a projection query on the selected properties for the kind "Order".
The result will be empty, with no error message, although entities with the selected properties do exist and the index is set up correctly.
Full (i.e. non-projection) queries and keys-only queries, on the other hand, work as expected.

For the very same setup, with just a different kind name, everything works fine.

b)
Try to run a GQL query like SELECT property1, property2 from Order, or even just SELECT * FROM Order through the Cloud Console.
An error message appears (German version here):
GQL-Abfragefehler: Encountered "Order" at line 1, column 89. Was expecting one of: <UNQUOTED_NAME>, <QUOTED_NAME>
Same result when putting "Order" into quotes, writing in all-caps or no-caps... whereas the very same setup with just a different kind name (like "Customer" instead of "Order") works without problems.

Conclusions/conjectures:
It seems "Order" is a reserved word in GQL and can therefore not be used as a kind name in GQL queries, whether in quotes or without quotes.
Maybe that is also the cause for the empty results for projection queries for kind "Order" through google-cloud-node, because it is internally translated into GQL or something?

I don't know where to file this issue concerning GQL, as my main concern is Node.js and that's what I am working with and where the issue came up. As for the other client libraries, I have not tested them, but I suspect it may turn up in any of the other language libraries as well.

This is not obvious at all. In the documentation I have only read about kind and property names preceded by two underscores being reserved. I don't think this is expected behaviour, is it?

[stephenplusplus]

This issue was moved to googleapis/google-cloud-datastore#177

[stephenplusplus]

Hey @cabeza-melon, thank you for filing. I moved this over to the general Datastore repo. After they have a chance to look into it, if there's anything we need to do in Node (or the other languages), we will file further issues to get that work done. The new issue is here: googleapis/google-cloud-datastore#177

[trollkotze]

Thanks.
I think now my issue was mistaken. I was just going to edit and rewrite it.
The GQL query works in principle by using backticks. However, it complains in the console that no index is defined for the specified properties. But the index is defined and runs in Node.js (with empty result).
I will try to be clearer on what happens and use the appropriate place to describe any problems that persist. Thanks for the redirect.

[trollkotze]

Okay, it seems that this here is my actual problem:
https://stackoverflow.com/questions/40514708/gql-projection-query-on-embedded-entity

In the mentioned projection query I had some properties of embedded entity type. Maybe should have thought of that myself that this might not be possible, even if the only intended use was to project the embeded entity and not filter or sort on it.

Sorry for spamming here. Maybe someone else will learn from my mistake. 🐒