introduce AR::ConnectionAdapters::PostgreSQL for sharing modules (wit…

…h AR-JDBC)

... 'shared' OID, ArrayParser and Cast helpers, also re-arranged Column's dependencies

activerecord/lib/active_record/connection_adapters/postgresql/array_parser.rb

@@ -1,6 +1,6 @@
 module ActiveRecord
   module ConnectionAdapters
-    class PostgreSQLColumn < Column
+    module PostgreSQL
       module ArrayParser
 
         DOUBLE_QUOTE = '"'

activerecord/lib/active_record/connection_adapters/postgresql/cast.rb

@@ -1,6 +1,6 @@
 module ActiveRecord
   module ConnectionAdapters
-    class PostgreSQLColumn < Column
+    module PostgreSQL
       module Cast
         def point_to_string(point)
           "(#{point[0]},#{point[1]})"

activerecord/lib/active_record/connection_adapters/postgresql/column.rb

@@ -1,7 +1,10 @@
+require 'active_record/connection_adapters/postgresql/cast'
+
 module ActiveRecord
   module ConnectionAdapters
     # PostgreSQL-specific extensions to column definitions in a table.
     class PostgreSQLColumn < Column #:nodoc:
+
       attr_accessor :array
 
       def initialize(name, default, oid_type, sql_type = nil, null = true)
@@ -29,7 +32,7 @@ def text?
 
       # :stopdoc:
       class << self
-        include PostgreSQLColumn::Cast
+        include PostgreSQL::Cast
 
         # Loads pg_array_parser if available. String parsing can be
         # performed quicker by a native extension, which will not create
@@ -40,7 +43,7 @@ class << self
           include PgArrayParser
         rescue LoadError
           require 'active_record/connection_adapters/postgresql/array_parser'
-          include PostgreSQLColumn::ArrayParser
+          include PostgreSQL::ArrayParser
         end
 
         attr_accessor :money_precision

activerecord/lib/active_record/connection_adapters/postgresql/oid.rb

@@ -1,8 +1,6 @@
-require 'active_record/connection_adapters/abstract_adapter'
-
 module ActiveRecord
   module ConnectionAdapters
-    class PostgreSQLAdapter < AbstractAdapter
+    module PostgreSQL
       module OID
         class Type
           def type; end

activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb

@@ -1,6 +1,6 @@
 module ActiveRecord
   module ConnectionAdapters
-    class PostgreSQLAdapter < AbstractAdapter
+    module PostgreSQL
       module Quoting
         # Escapes binary strings for bytea input to the database.
         def escape_bytea(value)

activerecord/lib/active_record/connection_adapters/postgresql/referential_integrity.rb

@@ -1,6 +1,6 @@
 module ActiveRecord
   module ConnectionAdapters
-    class PostgreSQLAdapter < AbstractAdapter
+    module PostgreSQL
       module ReferentialIntegrity
         def supports_disable_referential_integrity? #:nodoc:
           true

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

@@ -1,13 +1,14 @@
 require 'active_record/connection_adapters/abstract_adapter'
 require 'active_record/connection_adapters/statement_pool'
+
+require 'active_record/connection_adapters/postgresql/column'
 require 'active_record/connection_adapters/postgresql/oid'
-require 'active_record/connection_adapters/postgresql/cast'
-require 'active_record/connection_adapters/postgresql/array_parser'
 require 'active_record/connection_adapters/postgresql/quoting'
+require 'active_record/connection_adapters/postgresql/referential_integrity'
+
 require 'active_record/connection_adapters/postgresql/schema_statements'
 require 'active_record/connection_adapters/postgresql/database_statements'
-require 'active_record/connection_adapters/postgresql/referential_integrity'
-require 'active_record/connection_adapters/postgresql/column'
+
 require 'arel/visitors/bind_visitor'
 
 # Make sure we're using pg high enough for PGResult#values
@@ -44,6 +45,7 @@ def postgresql_connection(config)
   end
 
   module ConnectionAdapters
+
     # The PostgreSQL adapter works with the native C (https://bitbucket.org/ged/ruby-pg) driver.
     #
     # Options:
@@ -72,6 +74,7 @@ module ConnectionAdapters
     # In addition, default connection parameters of libpq can be set per environment variables.
     # See http://www.postgresql.org/docs/9.1/static/libpq-envars.html .
     class PostgreSQLAdapter < AbstractAdapter
+
       class ColumnDefinition < ActiveRecord::ConnectionAdapters::ColumnDefinition
         attr_accessor :array
       end
@@ -238,8 +241,10 @@ class Table < ActiveRecord::ConnectionAdapters::Table
         citext:      { name: "citext" }
       }
 
-      include Quoting
-      include ReferentialIntegrity
+      OID = PostgreSQL::OID #:nodoc:
+
+      include PostgreSQL::Quoting
+      include PostgreSQL::ReferentialIntegrity
       include SchemaStatements
       include DatabaseStatements
       include Savepoints