Updated postgresql documentation link to use latest version [ci skip]

activerecord/Rakefile

@@ -122,7 +122,7 @@ namespace :db do
 
       # prepare hstore
       if %x( createdb --version ).strip.gsub(/(.*)(\d\.\d\.\d)$/, "\\2") < "9.1.0"
-        puts "Please prepare hstore data type. See http://www.postgresql.org/docs/9.0/static/hstore.html"
+        puts "Please prepare hstore data type. See http://www.postgresql.org/docs/current/static/hstore.html"
       end
     end
 

activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb

@@ -189,7 +189,7 @@ def supports_statement_cache?
       # You should consult the documentation for your database to understand the
       # semantics of these different levels:
       #
-      # * http://www.postgresql.org/docs/9.1/static/transaction-iso.html
+      # * http://www.postgresql.org/docs/current/static/transaction-iso.html
       # * https://dev.mysql.com/doc/refman/5.6/en/set-transaction.html
       #
       # An <tt>ActiveRecord::TransactionIsolationError</tt> will be raised if:

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

@@ -66,11 +66,11 @@ module ConnectionAdapters
     #   defaults to true.
     #
     # Any further options are used as connection parameters to libpq. See
-    # http://www.postgresql.org/docs/9.1/static/libpq-connect.html for the
+    # http://www.postgresql.org/docs/current/static/libpq-connect.html for the
     # list of parameters.
     #
     # 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 .
+    # See http://www.postgresql.org/docs/current/static/libpq-envars.html .
     class PostgreSQLAdapter < AbstractAdapter
       ADAPTER_NAME = 'PostgreSQL'.freeze
 
@@ -424,7 +424,7 @@ def postgresql_version
           @connection.server_version
         end
 
-        # See http://www.postgresql.org/docs/9.1/static/errcodes-appendix.html
+        # See http://www.postgresql.org/docs/current/static/errcodes-appendix.html
         FOREIGN_KEY_VIOLATION = "23503"
         UNIQUE_VIOLATION      = "23505"
 
@@ -698,7 +698,7 @@ def configure_connection
           end
 
           # SET statements from :variables config hash
-          # http://www.postgresql.org/docs/8.3/static/sql-set.html
+          # http://www.postgresql.org/docs/current/static/sql-set.html
           variables = @config[:variables] || {}
           variables.map do |k, v|
             if v == ':default' || v == :default

guides/source/active_record_postgresql.md

@@ -29,8 +29,8 @@ that are supported by the PostgreSQL adapter.
 
 ### Bytea
 
-* [type definition](http://www.postgresql.org/docs/9.3/static/datatype-binary.html)
-* [functions and operators](http://www.postgresql.org/docs/9.3/static/functions-binarystring.html)
+* [type definition](http://www.postgresql.org/docs/current/static/datatype-binary.html)
+* [functions and operators](http://www.postgresql.org/docs/current/static/functions-binarystring.html)
 
 ```ruby
 # db/migrate/20140207133952_create_documents.rb
@@ -49,8 +49,8 @@ Document.create payload: data
 
 ### Array
 
-* [type definition](http://www.postgresql.org/docs/9.3/static/arrays.html)
-* [functions and operators](http://www.postgresql.org/docs/9.3/static/functions-array.html)
+* [type definition](http://www.postgresql.org/docs/current/static/arrays.html)
+* [functions and operators](http://www.postgresql.org/docs/current/static/functions-array.html)
 
 ```ruby
 # db/migrate/20140207133952_create_books.rb
@@ -83,7 +83,7 @@ Book.where("array_length(ratings, 1) >= 3")
 
 ### Hstore
 
-* [type definition](http://www.postgresql.org/docs/9.3/static/hstore.html)
+* [type definition](http://www.postgresql.org/docs/current/static/hstore.html)
 
 NOTE: you need to enable the `hstore` extension to use hstore.
 
@@ -112,8 +112,8 @@ profile.save!
 
 ### JSON
 
-* [type definition](http://www.postgresql.org/docs/9.3/static/datatype-json.html)
-* [functions and operators](http://www.postgresql.org/docs/9.3/static/functions-json.html)
+* [type definition](http://www.postgresql.org/docs/current/static/datatype-json.html)
+* [functions and operators](http://www.postgresql.org/docs/current/static/functions-json.html)
 
 ```ruby
 # db/migrate/20131220144913_create_events.rb
@@ -138,8 +138,8 @@ Event.where("payload->>'kind' = ?", "user_renamed")
 
 ### Range Types
 
-* [type definition](http://www.postgresql.org/docs/9.3/static/rangetypes.html)
-* [functions and operators](http://www.postgresql.org/docs/9.3/static/functions-range.html)
+* [type definition](http://www.postgresql.org/docs/current/static/rangetypes.html)
+* [functions and operators](http://www.postgresql.org/docs/current/static/functions-range.html)
 
 This type is mapped to Ruby [`Range`](http://www.ruby-doc.org/core-2.1.1/Range.html) objects.
 
@@ -173,7 +173,7 @@ event.ends_at # => Thu, 13 Feb 2014
 
 ### Composite Types
 
-* [type definition](http://www.postgresql.org/docs/9.3/static/rowtypes.html)
+* [type definition](http://www.postgresql.org/docs/current/static/rowtypes.html)
 
 Currently there is no special support for composite types. They are mapped to
 normal text columns:
@@ -213,7 +213,7 @@ contact.save!
 
 ### Enumerated Types
 
-* [type definition](http://www.postgresql.org/docs/9.3/static/datatype-enum.html)
+* [type definition](http://www.postgresql.org/docs/current/static/datatype-enum.html)
 
 Currently there is no special support for enumerated types. They are mapped as
 normal text columns:
@@ -242,9 +242,9 @@ article.save!
 
 ### UUID
 
-* [type definition](http://www.postgresql.org/docs/9.4/static/datatype-uuid.html)
-* [pgcrypto generator function](http://www.postgresql.org/docs/9.4/static/pgcrypto.html#AEN159361)
-* [uuid-ossp generator functions](http://www.postgresql.org/docs/9.4/static/uuid-ossp.html)
+* [type definition](http://www.postgresql.org/docs/current/static/datatype-uuid.html)
+* [pgcrypto generator function](http://www.postgresql.org/docs/current/static/pgcrypto.html#AEN159361)
+* [uuid-ossp generator functions](http://www.postgresql.org/docs/current/static/uuid-ossp.html)
 
 NOTE: you need to enable the `pgcrypto` (only PostgreSQL >= 9.4) or `uuid-ossp`
 extension to use uuid.
@@ -290,8 +290,8 @@ end
 
 ### Bit String Types
 
-* [type definition](http://www.postgresql.org/docs/9.3/static/datatype-bit.html)
-* [functions and operators](http://www.postgresql.org/docs/9.3/static/functions-bitstring.html)
+* [type definition](http://www.postgresql.org/docs/current/static/datatype-bit.html)
+* [functions and operators](http://www.postgresql.org/docs/current/static/functions-bitstring.html)
 
 ```ruby
 # db/migrate/20131220144913_create_users.rb
@@ -314,7 +314,7 @@ user.save!
 
 ### Network Address Types
 
-* [type definition](http://www.postgresql.org/docs/9.3/static/datatype-net-types.html)
+* [type definition](http://www.postgresql.org/docs/current/static/datatype-net-types.html)
 
 The types `inet` and `cidr` are mapped to Ruby
 [`IPAddr`](http://www.ruby-doc.org/stdlib-2.1.1/libdoc/ipaddr/rdoc/IPAddr.html)
@@ -349,7 +349,7 @@ macbook.address
 
 ### Geometric Types
 
-* [type definition](http://www.postgresql.org/docs/9.3/static/datatype-geometric.html)
+* [type definition](http://www.postgresql.org/docs/current/static/datatype-geometric.html)
 
 All geometric types, with the exception of `points` are mapped to normal text.
 A point is casted to an array containing `x` and `y` coordinates.
@@ -404,7 +404,7 @@ Document.where("to_tsvector('english', title || ' ' || body) @@ to_tsquery(?)",
 Database Views
 --------------
 
-* [view creation](http://www.postgresql.org/docs/9.3/static/sql-createview.html)
+* [view creation](http://www.postgresql.org/docs/current/static/sql-createview.html)
 
 Imagine you need to work with a legacy database containing the following table:
 

guides/source/active_record_validations.md

@@ -627,7 +627,7 @@ class Holiday < ActiveRecord::Base
     message: "should happen once per year" }
 end
 ```
-Should you wish to create a database constraint to prevent possible violations of a uniqueness validation using the `:scope` option, you must create a unique index on both columns in your database. See [the MySQL manual](http://dev.mysql.com/doc/refman/5.6/en/multiple-column-indexes.html) for more details about multiple column indexes or [the PostgreSQL manual](http://www.postgresql.org/docs/9.4/static/ddl-constraints.html) for examples of unique constraints that refer to a group of columns.
+Should you wish to create a database constraint to prevent possible violations of a uniqueness validation using the `:scope` option, you must create a unique index on both columns in your database. See [the MySQL manual](http://dev.mysql.com/doc/refman/5.6/en/multiple-column-indexes.html) for more details about multiple column indexes or [the PostgreSQL manual](http://www.postgresql.org/docs/current/static/ddl-constraints.html) for examples of unique constraints that refer to a group of columns.
 
 There is also a `:case_sensitive` option that you can use to define whether the
 uniqueness constraint will be case sensitive or not. This option defaults to