Named bind variables can now be used with postgresql-style typecasts

For example :conditions => ['stringcol::integer = :var', { :var => 10 }]
will no longer raise an exception about ':integer' having a missing value.

activerecord/lib/active_record/base.rb

@@ -2055,9 +2055,10 @@ module ActiveRecord #:nodoc:
         end
 
         def replace_named_bind_variables(statement, bind_vars) #:nodoc:
-          statement.gsub(/:([a-zA-Z]\w*)/) do
-            match = $1.to_sym
-            if bind_vars.include?(match)
+          statement.gsub(/(:?):([a-zA-Z]\w*)/) do
+            if $1 == ':' # skip postgresql casts
+              $& # return the whole match
+            elsif bind_vars.include?(match = $2.to_sym)
               quote_bound_value(bind_vars[match])
             else
               raise PreparedStatementInvalid, "missing value for :#{match} in #{statement}"

activerecord/test/cases/finder_test.rb

@@ -1,5 +1,6 @@
 require "cases/helper"
 require 'models/author'
+require 'models/categorization'
 require 'models/comment'
 require 'models/company'
 require 'models/topic'
@@ -394,6 +395,12 @@ class FinderTest < ActiveRecord::TestCase
     assert_equal '1,1,1', bind('?', os)
   end
 
+  def test_named_bind_with_postgresql_type_casts
+    l = Proc.new { bind(":a::integer '2009-01-01'::date", :a => '10') }
+    assert_nothing_raised(&l)
+    assert_equal "#{ActiveRecord::Base.quote_value('10')}::integer '2009-01-01'::date", l.call
+  end
+
   def test_string_sanitation
     assert_not_equal "#{ActiveRecord::Base.connection.quoted_string_prefix}'something ' 1=1'", ActiveRecord::Base.sanitize("something ' 1=1")
     assert_equal "#{ActiveRecord::Base.connection.quoted_string_prefix}'something; select table'", ActiveRecord::Base.sanitize("something; select table")