Is it possible for SqlDelight to not create a new ...

# squarelibraries

[Ernest Zamelczyk]

Is it possible for SqlDelight to not create a new type for a query like this:

query:
SELECT station.* FROM keyword LEFT JOIN station
ON keyword.station_id = station.id

I would like for it to just return the same type that the station table contains but it creates the exact duplicate under the name Query.

[kevin.cianfarini]

You aren’t required to use the generated type if you pass in a mapper when executing SQL in Kotlin https://cashapp.github.io/sqldelight/2.0.0/android_sqlite/custom_projections/

[kevin.cianfarini]

So if your case you’d do something like:

stationQueries.query(
  mapper = ::Station
).executeAsList()

[Ernest Zamelczyk]

hmmm.. it fails to match it because some parameters in Query are nullable but in Station they are required

[kevin.cianfarini]

You could filter them as being non-null in SQL if that’s what you truly want.

query:
SELECT station.* FROM keyword LEFT JOIN station
ON keyword.station_id = station.id
WHERE station.some_param IS NOT NULL;

[Ernest Zamelczyk]

I mean they are never null because the CREATE TABLE clause specifies it so I thought that the query should infer that

[Ernest Zamelczyk]

but I guess with join it cannot do that

[kevin.cianfarini]

I’m not sure if that’s a bug or not, though I would expect it is. Perhaps someone who maintains SQLDelight will chime in.

[Ernest Zamelczyk]

well the not null assertions fix the issue for now so thank for that 🙂

[hfhbd]

You can also use a view