Bump the minimum version of PostgreSQL to 9.3

.travis.yml

@@ -184,11 +184,6 @@ matrix:
       before_install:
         - "sudo sed -i 's/port = 5433/port = 5432/' /etc/postgresql/10/main/postgresql.conf"
         - "sudo service postgresql restart 10"
-    - rvm: 2.5.1
-      env:
-        - "GEM=ar:postgresql POSTGRES=9.2"
-      addons:
-        postgresql: "9.2"
     - rvm: jruby-head
       jdk: oraclejdk8
       env:

activerecord/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   Bump minimum PostgreSQL version to 9.3.
+
+    *Yasuo Honda*
+
 *   Values of enum are frozen, raising an error when attempting to modify them.
 
     *Emmanuel Byrd*

activerecord/lib/active_record/connection_adapters/abstract_adapter.rb

@@ -314,6 +314,11 @@ def supports_views?
         false
       end
 
+      # Does this adapter support materialized views?
+      def supports_materialized_views?
+        false
+      end
+
       # Does this adapter support datetime with precision?
       def supports_datetime_with_precision?
         false

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

@@ -185,7 +185,7 @@ def supports_datetime_with_precision?
       end
 
       def supports_json?
-        postgresql_version >= 90200
+        true
       end
 
       def supports_comments?
@@ -332,16 +332,16 @@ def supports_extensions?
       end
 
       def supports_ranges?
-        # Range datatypes weren't introduced until PostgreSQL 9.2
-        postgresql_version >= 90200
+        true
       end
+      deprecate :supports_ranges?
 
       def supports_materialized_views?
-        postgresql_version >= 90300
+        true
       end
 
       def supports_foreign_tables?
-        postgresql_version >= 90300
+        true
       end
 
       def supports_pgcrypto_uuid?
@@ -425,8 +425,8 @@ def default_index_type?(index) # :nodoc:
 
       private
         def check_version
-          if postgresql_version < 90100
-            raise "Your version of PostgreSQL (#{postgresql_version}) is too old. Active Record supports PostgreSQL >= 9.1."
+          if postgresql_version < 90300
+            raise "Your version of PostgreSQL (#{postgresql_version}) is too old. Active Record supports PostgreSQL >= 9.3."
           end
         end
 
@@ -589,18 +589,11 @@ def has_default_function?(default_value, default)
         def load_additional_types(oids = nil)
           initializer = OID::TypeMapInitializer.new(type_map)
 
-          if supports_ranges?
-            query = <<~SQL
-              SELECT t.oid, t.typname, t.typelem, t.typdelim, t.typinput, r.rngsubtype, t.typtype, t.typbasetype
-              FROM pg_type as t
-              LEFT JOIN pg_range as r ON oid = rngtypid
-            SQL
-          else
-            query = <<~SQL
-              SELECT t.oid, t.typname, t.typelem, t.typdelim, t.typinput, t.typtype, t.typbasetype
-              FROM pg_type as t
-            SQL
-          end
+          query = <<~SQL
+            SELECT t.oid, t.typname, t.typelem, t.typdelim, t.typinput, r.rngsubtype, t.typtype, t.typbasetype
+            FROM pg_type as t
+            LEFT JOIN pg_range as r ON oid = rngtypid
+          SQL
 
           if oids
             query += "WHERE t.oid::integer IN (%s)" % oids.join(", ")

activerecord/test/cases/adapters/postgresql/connection_test.rb

@@ -146,34 +146,15 @@ def test_statement_key_is_logged
       end
     end
 
-    # Must have PostgreSQL >= 9.2, or with_manual_interventions set to
-    # true for this test to run.
-    #
-    # When prompted, restart the PostgreSQL server with the
-    # "-m fast" option or kill the individual connection assuming
-    # you know the incantation to do that.
-    # To restart PostgreSQL 9.1 on macOS, installed via MacPorts, ...
-    # sudo su postgres -c "pg_ctl restart -D /opt/local/var/db/postgresql91/defaultdb/ -m fast"
     def test_reconnection_after_actual_disconnection_with_verify
       original_connection_pid = @connection.query("select pg_backend_pid()")
 
       # Sanity check.
       assert_predicate @connection, :active?
 
-      if @connection.send(:postgresql_version) >= 90200
-        secondary_connection = ActiveRecord::Base.connection_pool.checkout
-        secondary_connection.query("select pg_terminate_backend(#{original_connection_pid.first.first})")
-        ActiveRecord::Base.connection_pool.checkin(secondary_connection)
-      elsif ARTest.config["with_manual_interventions"]
-        puts "Kill the connection now (e.g. by restarting the PostgreSQL " \
-          'server with the "-m fast" option) and then press enter.'
-        $stdin.gets
-      else
-        # We're not capable of terminating the backend ourselves, and
-        # we're not allowed to seek assistance; bail out without
-        # actually testing anything.
-        return
-      end
+      secondary_connection = ActiveRecord::Base.connection_pool.checkout
+      secondary_connection.query("select pg_terminate_backend(#{original_connection_pid.first.first})")
+      ActiveRecord::Base.connection_pool.checkin(secondary_connection)
 
       @connection.verify!
 
@@ -261,6 +242,10 @@ def test_release_non_existent_advisory_lock
       end
     end
 
+    def test_supports_ranges_is_deprecated
+      assert_deprecated { @connection.supports_ranges? }
+    end
+
     private
 
       def with_warning_suppression