Question

In the GQL reference, it is encouraged to use the IN keyword with a list of values, and to construct a Key from hand the GQL query

SELECT * FROM MyModel WHERE __key__ = KEY('MyModel', 'my_model_key')

will succeed. However, using the code you would expect to work:

SELECT * FROM MyModel WHERE __key__ IN (KEY('MyModel', 'my_model_key1'),
                                        KEY('MyModel', 'my_model_key2'))

in the Datastore Viewer, there is a complaint of “Invalid GQL query string.”

What is the correct way to format such a query?

UPDATE: This is not possible to do with the current SDK. As I note in my comment, when using a list, only a reference (e.g. :1 or :email) or an int, float, string, boolean or null literal are acceptable list entries.

SECOND UPDATE: I fixed the bug and it is now possible to perform such queries. Fix can be found in Google Code Hosting diff.

PS I know there are more efficient ways to do this in Python (without constructing a GQL query) and using the remote_api, but each call to the remote_api counts against quota. In an environment where quota is not (necessarily) free, quick and dirty queries are very helpful.

Answer 1

After the fix was implemented, the code snippet from the original post will suffice:

SELECT * FROM MyModel WHERE __key__ IN (KEY('MyModel', 'my_model_key1'),
                                        KEY('MyModel', 'my_model_key2'))

PS I realized my comment on the original post may not be sufficiently clear as an answer to future viewers.