better test tags, and remove tests that don't produce valid SQL

Author: zachdaniel

integration_test/sql/subquery.exs

@@ -113,6 +113,7 @@ defmodule Ecto.Integration.SubQueryTest do
     assert [12, 12] = TestRepo.all(query)
   end
 
+  @tag :subquery_in_order_by
   test "subqueries in order by" do
     TestRepo.insert!(%Post{visits: 10, title: "hello"})
     TestRepo.insert!(%Post{visits: 11, title: "hello"})
@@ -123,6 +124,7 @@ defmodule Ecto.Integration.SubQueryTest do
   end
 
   @tag :multicolumn_distinct
+  @tag :subquery_in_distinct
   test "subqueries in distinct" do
     TestRepo.insert!(%Post{visits: 10, title: "hello1"})
     TestRepo.insert!(%Post{visits: 10, title: "hello2"})
@@ -133,6 +135,7 @@ defmodule Ecto.Integration.SubQueryTest do
     assert [%{title: "hello"}, %{title: "hello1"}] = TestRepo.all(query)
   end
 
+  @tag :subquery_in_group_by
   test "subqueries in group by" do
     TestRepo.insert!(%Post{visits: 10, title: "hello1"})
     TestRepo.insert!(%Post{visits: 10, title: "hello2"})

integration_test/tds/test_helper.exs

@@ -58,8 +58,12 @@ ExUnit.start(
     :selected_as_with_order_by_expression,
     # MSSQL doesn't support specifying columns for ON DELETE SET NULL
     :on_delete_nilify_column_list,
-    # MySQL doesnt' support anything except a single column in DISTINCT
-    :multicolumn_distinct
+    # MSSQL doesnt' support anything except a single column in DISTINCT
+    :multicolumn_distinct,
+    # MSSQL doesnt' support subqueries in group by or in distinct
+    :subquery_in_group_by,
+    :subquery_in_distinct,
+    :subquery_in_order_by
   ]
 )
 

test/ecto/adapters/tds_test.exs

@@ -516,22 +516,6 @@ defmodule Ecto.Adapters.TdsTest do
     query = Schema |> order_by([r], []) |> select([r], r.x) |> plan()
     assert all(query) == ~s{SELECT s0.[x] FROM [schema] AS s0}
 
-    query =
-      from(row in Schema, as: :r)
-      |> order_by(
-        asc:
-          exists(
-            from other_schema in "schema",
-              where: other_schema.x == parent_as(:r).x,
-              select: [other_schema.x]
-          )
-      )
-      |> select([r], r.x)
-      |> plan()
-
-    assert all(query) ==
-             ~s{SELECT s0.[x] FROM [schema] AS s0 ORDER BY exists(SELECT ss0.[x] AS [result] FROM [schema] AS ss0 WHERE (ss0.[x] = s0.[x]))}
-
     for dir <- [:asc_nulls_first, :asc_nulls_last, :desc_nulls_first, :desc_nulls_last] do
       assert_raise Ecto.QueryError, ~r"#{dir} is not supported in ORDER BY in MSSQL", fn ->
         Schema |> order_by([r], [{^dir, r.x}]) |> select([r], r.x) |> plan() |> all()
@@ -887,21 +871,6 @@ defmodule Ecto.Adapters.TdsTest do
 
     query = Schema |> group_by([r], []) |> select([r], r.x) |> plan()
     assert all(query) == ~s{SELECT s0.[x] FROM [schema] AS s0}
-
-    query =
-      from(row in Schema, as: :r, select: row.x)
-      |> group_by(
-        [r],
-        exists(
-          from other_schema in "schema",
-            where: other_schema.x == parent_as(:r).x,
-            select: [other_schema.x]
-        )
-      )
-      |> plan()
-
-    assert all(query) ==
-             ~s{SELECT s0.[x] FROM [schema] AS s0 GROUP BY exists(SELECT ss0.[x] AS [result] FROM [schema] AS ss0 WHERE (ss0.[x] = s0.[x]))}
   end
 
   test "interpolated values" do