PostgreSQL 10 new relkind for partitioned tables (#31336)

* PostgreSQL 10 new relkind for partitioned tables

Starting with PostgreSQL 10, we can now have partitioned tables natively

* Add comment

* Remove extra space

* Add test for partition table in postgreSQL10

* Select 'p' for "BASE TABLE" and add a test case
to support PostgreSQL 10 partition tables

* Address RuboCop offense

* Addressed incorrect `postgresql_version`

Fixes #33008.

[Yannick Schutz & Yasuo Honda & Ryuta Kamizono]

1 files changed, 22 insertions, 0 deletions

diff --git a/activerecord/test/cases/adapters/postgresql/partitions_test.rb b/activerecord/test/cases/adapters/postgresql/partitions_test.rb
new file mode 100644
index 0000000000..0ac9ca1200
--- /dev/null
+++ b/activerecord/test/cases/adapters/postgresql/partitions_test.rb
@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+require "cases/helper"
+
+class PostgreSQLPartitionsTest < ActiveRecord::PostgreSQLTestCase
+  def setup
+    @connection = ActiveRecord::Base.connection
+  end
+
+  def teardown
+    @connection.drop_table "partitioned_events", if_exists: true
+  end
+
+  def test_partitions_table_exists
+    skip unless ActiveRecord::Base.connection.postgresql_version >= 100000
+    @connection.create_table :partitioned_events, force: true, id: false,
+      options: "partition by range (issued_at)" do |t|
+      t.timestamp :issued_at
+    end
+    assert @connection.table_exists?("partitioned_events")
+  end
+end