Pre-projecting nested data

[Justin Porter]

Hey all,

I'm trying to gather the names of lists with a specific custom attribute that shots belong to. My question is two-fold:

1) Is there a way to return JUST the values I'm after in these queries?

For example in the query below,  from each shot I want only the lists with the "flagRV" attribute returned. Right now it returns all lists associated with the shot:

select name, project.name, project_id,
lists.name, lists.custom_attributes
from Shot
where
project.name = {0} and
name in ({1}) and
lists.custom_attributes any (key is "flagRV" and value is "True")

In this next query, I've reversed the logic to lookup by lists, but only want items (shots) returned that are mentioned in the query - right now it returns ALL items/shots in the resulting lists:

select name, project.name, project_id, items.name
from TypedContextList
where
project.name = {0} and
custom_attributes any (key is "flagRV" and value is "True") and
items any (name in ({1}))

 

2) Assuming the answer to my first question is NO, is there a way to pre-project data for nested items? With the queries above, only the shot/list ids are returned, even though I'm trying to explicitly return the names. In this scenario, lazy queries are not an option, so the data has to be pre-projected.

 

Thanks!

[Mattias Lagergren]

Hi Justin,

Do you want to retrieve both the shot and the list in the same query? But nothing else from the collections - i.e. not all entries in the list and not all lists).

Unfortunately I'm not sure this can be done with less than two queries.

 

[Justin Porter]

Yes, I'm trying to just return the list names a shot belongs to that have specific custom attribute values. It doesn't look like I'm able to do what I'm after in one query without having to do a bunch of post-processing/iterating through the lists.

[JPrydz]

Hi,

As mentioned earlier, this needs to be done with two queries.

Do you think that would be ok?

/Johan