Ruby 使用子查询和偏移量限制对Sequel数据集进行排序

我在尝试根据子查询的结果对数据集进行排序时遇到了一个奇怪的问题。它工作正常，直到我尝试添加一个带有偏移量的限制，然后我得到一个错误，说排序列名无效。这是一个调试器会话，它显示了这个问题。这是一个有点愚蠢的查询，我只是试图尽可能地简化真正的查询，同时仍然得到错误

首先，我只创建一个简单的select查询和一个子查询 ... 到目前为止一切都很好，让我们再加一个限制 仍然可以，但如果我们改变限制，使其有一个偏移量。。。 对我来说似乎是个虫子，但如果我发现自己只是在做傻事，我会很激动。知道出了什么问题吗

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我使用的是sequel 4.3.0和tiny_tds 0.5.1。

这是sequel talk Google组的回答：

这是针对MS SQL Server的吗？我只是假设，因为你用的是TDS。对不起，我应该更明确一点。这是针对MS SQL Server的。

irb(main):009:0> ds = DB[:competency].select(:competencyname)                                                           
=> #<Sequel::TinyTDS::Dataset: "SELECT [COMPETENCYNAME] FROM [COMPETENCY]">
irb(main):010:0> ds = ds.select_more(Sequel.as Mssql::CompetencyRating.select(:rating).limit(1), :manager_rating )         => #<Sequel::TinyTDS::Dataset: "SELECT [COMPETENCYNAME], (SELECT TOP (1) [RATING] FROM [COMPETENCYRATING]) AS [MANAGER_RATING] FROM [COMPETENCY]">
irb(main):011:0> ds.count
=> 795

irb(main):012:0> ds = ds.limit(10)
=> #<Sequel::TinyTDS::Dataset: "SELECT TOP (10) [COMPETENCYNAME], (SELECT TOP (1) [RATING] FROM [COMPETENCYRATING]) AS [MANAGER_RATING] FROM [COMPETENCY]">
irb(main):013:0> ds.count                                                                                                   => 10

irb(main):015:0> ds = ds.limit(10,2)
=> #<Sequel::TinyTDS::Dataset: "SELECT TOP (10) [COMPETENCYNAME], [MANAGER_RATING] FROM (SELECT [COMPETENCYNAME], (SELECT TOP (1) [RATING] FROM [COMPETENCYRATING]) AS [MANAGER_RATING], ROW_NUMBER() OVER (ORDER BY [COMPETENCYNAME], [MANAGER_RATING]) AS [X_SEQUEL_ROW_NUMBER_X] FROM [COMPETENCY]) AS [T1] WHERE ([X_SEQUEL_ROW_NUMBER_X] > 2) ORDER BY [X_SEQUEL_ROW_NUMBER_X]">
irb(main):016:0> ds.count
Sequel::DatabaseError: TinyTds::Error: Invalid column name 'MANAGER_RATING'.
        from /home/tlittle/.rvm/gems/ruby-1.9.3-p327@tms_mobile/gems/sequel-4.3.0/lib/sequel/adapters/tinytds.rb:233:in `fields'
        from /home/tlittle/.rvm/gems/ruby-1.9.3-p327@tms_mobile/gems/sequel-4.3.0/lib/sequel/adapters/tinytds.rb:233:in `block in fetch_rows'
        from /home/tlittle/.rvm/gems/ruby-1.9.3-p327@tms_mobile/gems/sequel-4.3.0/lib/sequel/adapters/tinytds.rb:63:in `block in execute'
        from /home/tlittle/.rvm/gems/ruby-1.9.3-p327@tms_mobile/gems/sequel-4.3.0/lib/sequel/database/connecting.rb:229:in `block in synchroni
ze'
        from /home/tlittle/.rvm/gems/ruby-1.9.3-p327@tms_mobile/gems/sequel-4.3.0/lib/sequel/connection_pool/sharded_threaded.rb:128:in `hold'
        from /home/tlittle/.rvm/gems/ruby-1.9.3-p327@tms_mobile/gems/sequel-4.3.0/lib/sequel/database/connecting.rb:229:in `synchronize'
        from /home/tlittle/.rvm/gems/ruby-1.9.3-p327@tms_mobile/gems/sequel-4.3.0/lib/sequel/adapters/tinytds.rb:32:in `execute'
        from /home/tlittle/.rvm/gems/ruby-1.9.3-p327@tms_mobile/gems/sequel-4.3.0/lib/sequel/dataset/actions.rb:793:in `execute'
        from /home/tlittle/.rvm/gems/ruby-1.9.3-p327@tms_mobile/gems/sequel-4.3.0/lib/sequel/adapters/tinytds.rb:232:in `fetch_rows'
        from /home/tlittle/.rvm/gems/ruby-1.9.3-p327@tms_mobile/gems/sequel-4.3.0/lib/sequel/dataset/actions.rb:143:in `each'
        from /home/tlittle/.rvm/gems/ruby-1.9.3-p327@tms_mobile/gems/sequel-4.3.0/lib/sequel/dataset/actions.rb:583:in `single_record'
        from /home/tlittle/.rvm/gems/ruby-1.9.3-p327@tms_mobile/gems/sequel-4.3.0/lib/sequel/dataset/actions.rb:591:in `single_value'
        from /home/tlittle/.rvm/gems/ruby-1.9.3-p327@tms_mobile/gems/sequel-4.3.0/lib/sequel/dataset/actions.rb:250:in `get'
        from /home/tlittle/.rvm/gems/ruby-1.9.3-p327@tms_mobile/gems/sequel-4.3.0/lib/sequel/dataset/actions.rb:107:in `count'
        from (irb):16
        from /home/tlittle/.rvm/gems/ruby-1.9.3-p327@tms_mobile/gems/railties-3.2.13/lib/rails/commands/console.rb:47:in `start'
        from /home/tlittle/.rvm/gems/ruby-1.9.3-p327@tms_mobile/gems/railties-3.2.13/lib/rails/commands/console.rb:8:in `start'
        from /home/tlittle/.rvm/gems/ruby-1.9.3-p327@tms_mobile/gems/railties-3.2.13/lib/rails/commands.rb:41:in `<top (required)>'
        from script/rails:6:in `require'
        from script/rails:6:in `<main>'irb(main):017:0>