Array Type Mapping not working

Hi guys, I have a strange problem, maybe it is something that I’m missing out, but I have the following LINQ Lambda query:

    var ss = ctx.ShipZones.SelectMany(
                    z => ctx.ShipDecks,
                    (z, d) => 
                        new
                        {
                            Zone = z.ZIndex,
                            Deck = d.DIndex,
                            Value = ctx.Tags
                                .AsExpandable()
                                .Include(s => s.TagSettings.Device.System)
                                .Where(s =>
                                     s.TagSettings.TagTypeId == 171
                                     && s.TagSettings.Device.System.Id == z.Id
                                     && s.TagSettings.Device.ControlArea.Contains(d.Id)
                                        )
                                .Average(s => s.Value)
                        }
                    ).ToList();

According to this article, this should be translated to this:

SELECT z.z_index AS "Zone", d.d_index AS "Deck", (
    SELECT AVG(t.value)
    FROM tags_current_data AS t
    INNER JOIN tags_settings AS t0 ON t.tag_id = t0.id
    INNER JOIN systems_devices AS s ON t0.device_id = s.id
    INNER JOIN systems AS s0 ON s.system_id = s0.id
    WHERE ((t0.tag_type_id = 171) AND (s0.id = z.id)) AND (d.id = ANY(s.control_area))) AS "Value"
FROM zones AS z
CROSS JOIN decks AS d

But somehow, the translated query is like this:

SELECT z.z_index AS "Zone", d.d_index AS "Deck", (
    SELECT AVG(t.value)
    FROM tags_current_data AS t
    INNER JOIN tags_settings AS t0 ON t.tag_id = t0.id
    INNER JOIN systems_devices AS s ON t0.device_id = s.id
    INNER JOIN systems AS s0 ON s.system_id = s0.id
    WHERE ((t0.tag_type_id = 171) AND (s0.id = z.id)) AND (TRUE = FALSE)) AS "Value"
FROM zones AS z
CROSS JOIN decks AS d

The difference is where it should be d.id = ANY(s.control_area) it is TRUE = FALSE Can anyone tell me what am I doing wrong?

Thanks in advance, Julian Dimitrov

[roji]

Great, thanks for confirming. The new query uses array containment syntax because that allows for index use - if control_area has an index, the query will run much faster than with ANY. See #1372 for more details.

[julian-dimitroff]

@roji yes it produces a query but it is a bit different. As no expert in postgresql I’ll paste here the query that was produced when the entity has type List<long>

SELECT z.z_index AS "Zone", d.d_index AS "Deck", (
    SELECT AVG(t.value)
    FROM tags_current_data AS t
    INNER JOIN tags_settings AS t0 ON t.tag_id = t0.id
    INNER JOIN systems_devices AS s ON t0.device_id = s.id
    INNER JOIN systems AS s0 ON s.system_id = s0.id
    WHERE ((t0.tag_type_id = 171) AND (s0.id = z.id)) AND (s.control_area @> ARRAY[d.id]::bigint[])) AS "Value"
FROM zones AS z
CROSS JOIN decks AS d

The query works as expected when applied on the database server.

BR, Julian