reproduce oracle-enhanced-adapter issue i546 (rails42: missing right paren when creating table with timestamp)

Gemfile

source "https://rubygems.org"

gem "activerecord", "~> 4.2.0"
gem "activerecord-oracle_enhanced-adapter",
    git: '[email protected]:rsim/oracle-enhanced.git',
    branch: 'rails42',
    ref: '518dc3cf6a1f6e3593751d30d392518dc69d1a3a'
gem "ruby-oci8"
gem "arel", "~> 6.0.0"

Gemfile.lock

GIT
  remote: [email protected]:rsim/oracle-enhanced.git
  revision: 518dc3cf6a1f6e3593751d30d392518dc69d1a3a
  ref: 518dc3cf6a1f6e3593751d30d392518dc69d1a3a
  branch: rails42
  specs:
    activerecord-oracle_enhanced-adapter (1.5.5)

GEM
  remote: https://rubygems.org/
  specs:
    activemodel (4.2.0)
      activesupport (= 4.2.0)
      builder (~> 3.1)
    activerecord (4.2.0)
      activemodel (= 4.2.0)
      activesupport (= 4.2.0)
      arel (~> 6.0)
    activesupport (4.2.0)
      i18n (~> 0.7)
      json (~> 1.7, >= 1.7.7)
      minitest (~> 5.1)
      thread_safe (~> 0.3, >= 0.3.4)
      tzinfo (~> 1.1)
    arel (6.0.0)
    builder (3.2.2)
    i18n (0.7.0)
    json (1.8.2)
    minitest (5.5.1)
    ruby-oci8 (2.1.7)
    thread_safe (0.3.4)
    tzinfo (1.2.2)
      thread_safe (~> 0.1)

PLATFORMS
  ruby

DEPENDENCIES
  activerecord (~> 4.2.0)
  activerecord-oracle_enhanced-adapter!
  arel (~> 6.0.0)
  ruby-oci8

missing_right_paren.rb

#!/usr/bin/env ruby

require 'bundler'
Bundler.setup
require 'active_record'
require 'logger'

ActiveRecord::Base.establish_connection(adapter: 'oracle_enhanced',
                                        host: 'localhost',
                                        database: 'orcl.internal.databill.com',
                                        username: 'sandbox1',
                                        password: ENV['PASSWORD'])
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table "jobs", force: true do |t|
    t.timestamp "run_time",             limit: 6
  end
end

output

-- create_table("jobs", {:force=>true})
D, [2015-02-23T07:33:43.356535 #29286] DEBUG -- :    (2.1ms)  CREATE TABLE "JOBS" ("ID" NUMBER(38) NOT NULL PRIMARY KEY, "RUN_TIME" DATE(6)) 
E, [2015-02-23T07:33:43.356854 #29286] ERROR -- : OCIError: ORA-00907: missing right parenthesis: CREATE TABLE "JOBS" ("ID" NUMBER(38) NOT NULL PRIMARY KEY, "RUN_TIME" DATE(6))
stmt.c:230:in oci8lib_220.so: OCIError: ORA-00907: missing right parenthesis: CREATE TABLE "JOBS" ("ID" NUMBER(38) NOT NULL PRIMARY KEY, "RUN_TIME" DATE(6))  (ActiveRecord::StatementInvalid)
        from /home/wayne/.rvm/gems/ruby-2.2.0/gems/ruby-oci8-2.1.7/lib/oci8/cursor.rb:129:in `exec'
        from /home/wayne/.rvm/gems/ruby-2.2.0/gems/ruby-oci8-2.1.7/lib/oci8/oci8.rb:278:in `exec_internal'
        from /home/wayne/.rvm/gems/ruby-2.2.0/gems/ruby-oci8-2.1.7/lib/oci8/oci8.rb:269:in `exec'
        from /home/wayne/.rvm/gems/ruby-2.2.0/bundler/gems/oracle-enhanced-518dc3cf6a1f/lib/active_record/connection_adapters/oracle_enhanced_oci_connection.rb:429:in `exec'
        from /home/wayne/.rvm/gems/ruby-2.2.0/bundler/gems/oracle-enhanced-518dc3cf6a1f/lib/active_record/connection_adapters/oracle_enhanced_oci_connection.rb:88:in `exec'
        from /home/wayne/.rvm/gems/ruby-2.2.0/bundler/gems/oracle-enhanced-518dc3cf6a1f/lib/active_record/connection_adapters/oracle_enhanced_database_statements.rb:10:in `block in execute'
        from /home/wayne/.rvm/gems/ruby-2.2.0/gems/activerecord-4.2.0/lib/active_record/connection_adapters/abstract_adapter.rb:466:in `block in log'
        from /home/wayne/.rvm/gems/ruby-2.2.0/gems/activesupport-4.2.0/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
        from /home/wayne/.rvm/gems/ruby-2.2.0/gems/activerecord-4.2.0/lib/active_record/connection_adapters/abstract_adapter.rb:460:in `log'
        from /home/wayne/.rvm/gems/ruby-2.2.0/bundler/gems/oracle-enhanced-518dc3cf6a1f/lib/active_record/connection_adapters/oracle_enhanced_adapter.rb:1288:in `log'
        from /home/wayne/.rvm/gems/ruby-2.2.0/bundler/gems/oracle-enhanced-518dc3cf6a1f/lib/active_record/connection_adapters/oracle_enhanced_database_statements.rb:10:in `execute'
        from /home/wayne/.rvm/gems/ruby-2.2.0/bundler/gems/oracle-enhanced-518dc3cf6a1f/lib/active_record/connection_adapters/oracle_enhanced_schema_statements.rb:82:in `create_table'
        from /home/wayne/.rvm/gems/ruby-2.2.0/gems/activerecord-4.2.0/lib/active_record/migration.rb:662:in `block in method_missing'
        from /home/wayne/.rvm/gems/ruby-2.2.0/gems/activerecord-4.2.0/lib/active_record/migration.rb:632:in `block in say_with_time'
        from /home/wayne/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/benchmark.rb:288:in `measure'
        from /home/wayne/.rvm/gems/ruby-2.2.0/gems/activerecord-4.2.0/lib/active_record/migration.rb:632:in `say_with_time'
        from /home/wayne/.rvm/gems/ruby-2.2.0/gems/activerecord-4.2.0/lib/active_record/migration.rb:652:in `method_missing'
        from ./missing_right_paren.rb:16:in `block in <main>'
        from /home/wayne/.rvm/gems/ruby-2.2.0/gems/activerecord-4.2.0/lib/active_record/schema.rb:41:in `instance_eval'
        from /home/wayne/.rvm/gems/ruby-2.2.0/gems/activerecord-4.2.0/lib/active_record/schema.rb:41:in `define'
        from /home/wayne/.rvm/gems/ruby-2.2.0/gems/activerecord-4.2.0/lib/active_record/schema.rb:61:in `define'
        from ./missing_right_paren.rb:15:in `<main>'