aboutsummaryrefslogtreecommitdiffstats
path: root/spec/engines/sql/integration/joins/with_aggregations_spec.rb
diff options
context:
space:
mode:
Diffstat (limited to 'spec/engines/sql/integration/joins/with_aggregations_spec.rb')
-rw-r--r--spec/engines/sql/integration/joins/with_aggregations_spec.rb221
1 files changed, 221 insertions, 0 deletions
diff --git a/spec/engines/sql/integration/joins/with_aggregations_spec.rb b/spec/engines/sql/integration/joins/with_aggregations_spec.rb
new file mode 100644
index 0000000000..62e1b8baea
--- /dev/null
+++ b/spec/engines/sql/integration/joins/with_aggregations_spec.rb
@@ -0,0 +1,221 @@
+require 'spec_helper'
+
+module Arel
+ describe Join do
+ before do
+ @relation1 = Table(:users)
+ @relation2 = Table(:photos)
+ @predicate = @relation1[:id].eq(@relation2[:user_id])
+ end
+
+ describe 'when joining aggregated relations' do
+ before do
+ @aggregation = @relation2 \
+ .group(@relation2[:user_id]) \
+ .project(@relation2[:user_id], @relation2[:id].count.as(:cnt)) \
+ end
+
+ describe '#to_sql' do
+ # CLEANUP
+ it '' do
+ sql = @relation1.join(@relation2.take(3)).on(@predicate).to_sql
+
+ adapter_is :mysql do
+ sql.should be_like(%Q{
+ SELECT `users`.`id`, `users`.`name`, `photos_external`.`id`, `photos_external`.`user_id`, `photos_external`.`camera_id`
+ FROM `users`
+ INNER JOIN (SELECT `photos`.`id`, `photos`.`user_id`, `photos`.`camera_id` FROM `photos` LIMIT 3) `photos_external`
+ ON `users`.`id` = `photos_external`.`user_id`
+ })
+ end
+
+ adapter_is :oracle do
+ sql.should be_like(%Q{
+ SELECT "USERS"."ID", "USERS"."NAME", "PHOTOS_EXTERNAL"."ID", "PHOTOS_EXTERNAL"."USER_ID", "PHOTOS_EXTERNAL"."CAMERA_ID"
+ FROM "USERS"
+ INNER JOIN (SELECT "PHOTOS"."ID", "PHOTOS"."USER_ID", "PHOTOS"."CAMERA_ID" FROM "PHOTOS" WHERE ROWNUM <= 3) "PHOTOS_EXTERNAL"
+ ON "USERS"."ID" = "PHOTOS_EXTERNAL"."USER_ID"
+ })
+ end
+
+ adapter_is_not :mysql, :oracle do
+ sql.should be_like(%Q{
+ SELECT "users"."id", "users"."name", "photos_external"."id", "photos_external"."user_id", "photos_external"."camera_id"
+ FROM "users"
+ INNER JOIN (SELECT "photos"."id", "photos"."user_id", "photos"."camera_id" FROM "photos" LIMIT 3) "photos_external"
+ ON "users"."id" = "photos_external"."user_id"
+ })
+ end
+ end
+
+ describe 'with the aggregation on the right' do
+ it 'manufactures sql joining the left table to a derived table' do
+ sql = @relation1.join(@aggregation).on(@predicate).to_sql
+
+ adapter_is :mysql do
+ sql.should be_like(%Q{
+ SELECT `users`.`id`, `users`.`name`, `photos_external`.`user_id`, `photos_external`.`cnt`
+ FROM `users`
+ INNER JOIN (SELECT `photos`.`user_id`, COUNT(`photos`.`id`) AS `cnt` FROM `photos` GROUP BY `photos`.`user_id`) `photos_external`
+ ON `users`.`id` = `photos_external`.`user_id`
+ })
+ end
+
+ adapter_is :oracle do
+ sql.should be_like(%Q{
+ SELECT "USERS"."ID", "USERS"."NAME", "PHOTOS_EXTERNAL"."USER_ID", "PHOTOS_EXTERNAL"."CNT"
+ FROM "USERS"
+ INNER JOIN (SELECT "PHOTOS"."USER_ID", COUNT("PHOTOS"."ID") AS "CNT" FROM "PHOTOS" GROUP BY "PHOTOS"."USER_ID") "PHOTOS_EXTERNAL"
+ ON "USERS"."ID" = "PHOTOS_EXTERNAL"."USER_ID"
+ })
+ end
+
+ adapter_is_not :mysql, :oracle do
+ sql.should be_like(%Q{
+ SELECT "users"."id", "users"."name", "photos_external"."user_id", "photos_external"."cnt"
+ FROM "users"
+ INNER JOIN (SELECT "photos"."user_id", COUNT("photos"."id") AS "cnt" FROM "photos" GROUP BY "photos"."user_id") "photos_external"
+ ON "users"."id" = "photos_external"."user_id"
+ })
+ end
+ end
+ end
+
+ describe 'with the aggregation on the left' do
+ it 'manufactures sql joining the right table to a derived table' do
+ sql = @aggregation.join(@relation1).on(@predicate).to_sql
+
+ adapter_is :mysql do
+ sql.should be_like(%Q{
+ SELECT `photos_external`.`user_id`, `photos_external`.`cnt`, `users`.`id`, `users`.`name`
+ FROM (SELECT `photos`.`user_id`, COUNT(`photos`.`id`) AS `cnt` FROM `photos` GROUP BY `photos`.`user_id`) `photos_external`
+ INNER JOIN `users`
+ ON `users`.`id` = `photos_external`.`user_id`
+ })
+ end
+
+ adapter_is :oracle do
+ sql.should be_like(%Q{
+ SELECT "PHOTOS_EXTERNAL"."USER_ID", "PHOTOS_EXTERNAL"."CNT", "USERS"."ID", "USERS"."NAME"
+ FROM (SELECT "PHOTOS"."USER_ID", COUNT("PHOTOS"."ID") AS "CNT" FROM "PHOTOS" GROUP BY "PHOTOS"."USER_ID") "PHOTOS_EXTERNAL"
+ INNER JOIN "USERS"
+ ON "USERS"."ID" = "PHOTOS_EXTERNAL"."USER_ID"
+ })
+ end
+
+ adapter_is_not :mysql, :oracle do
+ sql.should be_like(%Q{
+ SELECT "photos_external"."user_id", "photos_external"."cnt", "users"."id", "users"."name"
+ FROM (SELECT "photos"."user_id", COUNT("photos"."id") AS "cnt" FROM "photos" GROUP BY "photos"."user_id") "photos_external"
+ INNER JOIN "users"
+ ON "users"."id" = "photos_external"."user_id"
+ })
+ end
+ end
+ end
+
+ describe 'with the aggregation on both sides' do
+ it 'it properly aliases the aggregations' do
+ aggregation2 = @aggregation.alias
+ sql = @aggregation.join(aggregation2).on(aggregation2[:user_id].eq(@aggregation[:user_id])).to_sql
+
+ adapter_is :mysql do
+ sql.should be_like(%Q{
+ SELECT `photos_external`.`user_id`, `photos_external`.`cnt`, `photos_external_2`.`user_id`, `photos_external_2`.`cnt`
+ FROM (SELECT `photos`.`user_id`, COUNT(`photos`.`id`) AS `cnt` FROM `photos` GROUP BY `photos`.`user_id`) `photos_external`
+ INNER JOIN (SELECT `photos`.`user_id`, COUNT(`photos`.`id`) AS `cnt` FROM `photos` GROUP BY `photos`.`user_id`) `photos_external_2`
+ ON `photos_external_2`.`user_id` = `photos_external`.`user_id`
+ })
+ end
+
+ adapter_is :oracle do
+ sql.should be_like(%Q{
+ SELECT "PHOTOS_EXTERNAL"."USER_ID", "PHOTOS_EXTERNAL"."CNT", "PHOTOS_EXTERNAL_2"."USER_ID", "PHOTOS_EXTERNAL_2"."CNT"
+ FROM (SELECT "PHOTOS"."USER_ID", COUNT("PHOTOS"."ID") AS "CNT" FROM "PHOTOS" GROUP BY "PHOTOS"."USER_ID") "PHOTOS_EXTERNAL"
+ INNER JOIN (SELECT "PHOTOS"."USER_ID", COUNT("PHOTOS"."ID") AS "CNT" FROM "PHOTOS" GROUP BY "PHOTOS"."USER_ID") "PHOTOS_EXTERNAL_2"
+ ON "PHOTOS_EXTERNAL_2"."USER_ID" = "PHOTOS_EXTERNAL"."USER_ID"
+ })
+ end
+
+ adapter_is_not :mysql, :oracle do
+ sql.should be_like(%Q{
+ SELECT "photos_external"."user_id", "photos_external"."cnt", "photos_external_2"."user_id", "photos_external_2"."cnt"
+ FROM (SELECT "photos"."user_id", COUNT("photos"."id") AS "cnt" FROM "photos" GROUP BY "photos"."user_id") "photos_external"
+ INNER JOIN (SELECT "photos"."user_id", COUNT("photos"."id") AS "cnt" FROM "photos" GROUP BY "photos"."user_id") "photos_external_2"
+ ON "photos_external_2"."user_id" = "photos_external"."user_id"
+ })
+ end
+ end
+ end
+
+ describe 'when the aggration has a where' do
+ describe 'with the aggregation on the left' do
+ it "manufactures sql keeping wheres on the aggregation within the derived table" do
+ sql = @relation1.join(@aggregation.where(@aggregation[:user_id].eq(1))).on(@predicate).to_sql
+
+ adapter_is :mysql do
+ sql.should be_like(%Q{
+ SELECT `users`.`id`, `users`.`name`, `photos_external`.`user_id`, `photos_external`.`cnt`
+ FROM `users`
+ INNER JOIN (SELECT `photos`.`user_id`, COUNT(`photos`.`id`) AS `cnt` FROM `photos` WHERE `photos`.`user_id` = 1 GROUP BY `photos`.`user_id`) `photos_external`
+ ON `users`.`id` = `photos_external`.`user_id`
+ })
+ end
+
+ adapter_is :oracle do
+ sql.should be_like(%Q{
+ SELECT "USERS"."ID", "USERS"."NAME", "PHOTOS_EXTERNAL"."USER_ID", "PHOTOS_EXTERNAL"."CNT"
+ FROM "USERS"
+ INNER JOIN (SELECT "PHOTOS"."USER_ID", COUNT("PHOTOS"."ID") AS "CNT" FROM "PHOTOS" WHERE "PHOTOS"."USER_ID" = 1 GROUP BY "PHOTOS"."USER_ID") "PHOTOS_EXTERNAL"
+ ON "USERS"."ID" = "PHOTOS_EXTERNAL"."USER_ID"
+ })
+ end
+
+ adapter_is_not :mysql, :oracle do
+ sql.should be_like(%Q{
+ SELECT "users"."id", "users"."name", "photos_external"."user_id", "photos_external"."cnt"
+ FROM "users"
+ INNER JOIN (SELECT "photos"."user_id", COUNT("photos"."id") AS "cnt" FROM "photos" WHERE "photos"."user_id" = 1 GROUP BY "photos"."user_id") "photos_external"
+ ON "users"."id" = "photos_external"."user_id"
+ })
+ end
+ end
+ end
+
+ describe 'with the aggregation on the right' do
+ it "manufactures sql keeping wheres on the aggregation within the derived table" do
+ sql = @aggregation.where(@aggregation[:user_id].eq(1)).join(@relation1).on(@predicate).to_sql
+
+ adapter_is :mysql do
+ sql.should be_like(%Q{
+ SELECT `photos_external`.`user_id`, `photos_external`.`cnt`, `users`.`id`, `users`.`name`
+ FROM (SELECT `photos`.`user_id`, COUNT(`photos`.`id`) AS `cnt` FROM `photos` WHERE `photos`.`user_id` = 1 GROUP BY `photos`.`user_id`) `photos_external`
+ INNER JOIN `users`
+ ON `users`.`id` = `photos_external`.`user_id`
+ })
+ end
+
+ adapter_is :oracle do
+ sql.should be_like(%Q{
+ SELECT "PHOTOS_EXTERNAL"."USER_ID", "PHOTOS_EXTERNAL"."CNT", "USERS"."ID", "USERS"."NAME"
+ FROM (SELECT "PHOTOS"."USER_ID", COUNT("PHOTOS"."ID") AS "CNT" FROM "PHOTOS" WHERE "PHOTOS"."USER_ID" = 1 GROUP BY "PHOTOS"."USER_ID") "PHOTOS_EXTERNAL"
+ INNER JOIN "USERS"
+ ON "USERS"."ID" = "PHOTOS_EXTERNAL"."USER_ID"
+ })
+ end
+
+ adapter_is_not :mysql, :oracle do
+ sql.should be_like(%Q{
+ SELECT "photos_external"."user_id", "photos_external"."cnt", "users"."id", "users"."name"
+ FROM (SELECT "photos"."user_id", COUNT("photos"."id") AS "cnt" FROM "photos" WHERE "photos"."user_id" = 1 GROUP BY "photos"."user_id") "photos_external"
+ INNER JOIN "users"
+ ON "users"."id" = "photos_external"."user_id"
+ })
+ end
+ end
+ end
+ end
+ end
+ end
+ end
+end
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 23:16:52 +0000