TinyTds::Error: 过程需要参数

Question

给定以下红宝石：

    sql2 = 'SELECT (CASE WHEN freq = 0 THEN \'pass\' ELSE \'fail\' END) FROM ( 
SELECT COUNT(*) freq FROM Grant_Award WHERE Grant_Award.org_ticker IS NULL )x;'
    pp ActiveRecord::Base.connection.select_all(sql2)

    sql1 = "SELECT (CASE WHEN freq = 0 THEN 'pass' ELSE 'fail' END) FROM ( SELECT COUNT(*) freq FROM Grant_Award WHERE Grant_Award.org_ticker IS NULL )x;"
    pp ActiveRecord::Base.connection.select_all(sql1)

    sql0 = File.readlines(File.join(BASE,'db','scripts','test','pass_or_fail.sql'))
    sql = (sql0.map {|l| l.strip}).join(' ')
    pp sql
    pp ActiveRecord::Base.connection.select_all(sql)

以上产生以下结果：

#<ActiveRecord::Result:0x38b0ce0
 @column_types={},
 @columns=[""],
 @hash_rows=nil,
 @rows=[["pass"]]>

#<ActiveRecord::Result:0x38b5ae0
 @column_types={},
 @columns=[""],
 @hash_rows=nil,
 @rows=[["pass"]]>

"SELECT (CASE WHEN freq = 0 THEN 'pass' ELSE 'fail' END) FROM ( SELECT COUNT(*) freq FROM Grant_Award WHERE Grant_Award.org_ticker IS NULL )x;"

C:/Ruby193/lib/ruby/gems/1.9.1/gems/activerecord-sqlserver-adapter-4.2.2/lib/active_record/connection_adapters/sqlserver/database_statements.rb:336:in `each': TinyTds::Error: Procedure expects parameter '@statement' of type 'ntext/nchar/nvarchar'.: EXEC sp_executesql 'SELECT (CASE WHEN freq = 0 THEN ''pass'' ELSE ''fail'' END) FROM ( SELECT COUNT(*) freq FROM Grant_Award WHERE Grant_Award.org_ticker IS NULL )x;' (ActiveRecord::StatementInvalid)

执行 sql 的前两次尝试都返回正常。第三个，从文件中读取到数组中，然后加入，炸弹。我知道这一定与字符串的处理有关。但我想不通。

我做错了什么？为什么它（tinytds 或 activerecord？）认为这是一个存储过程？

我想做的是在一个文件夹里放一大堆sql脚本，然后一个一个地执行。

详细信息：ruby 1.9.3、activerecord (4.2.0) 和 tiny_tds (0.6.2-x86-mingw32)

Answer 1

我今天早上醒来，意识到这一定与磁盘上文件的字符集有关。以下是[不更改查询]的解决方案：

ActiveRecord::Base.connection.select_all(sql0.join(" ").encode("UTF-8"))

我在提交时将字符集强制为utf-8，现在一切正常。

证明：

#<ActiveRecord::Result:0x3bede68
 @column_types={},
 @columns=[""],
 @hash_rows=nil,
 @rows=[["pass"]]>

#<ActiveRecord::Result:0x3bf2c68
 @column_types={},
 @columns=[""],
 @hash_rows=nil,
 @rows=[["pass"]]>

"SELECT (CASE WHEN freq = 0 THEN 'pass' ELSE 'fail' END) FROM ( SELECT COUNT(*) freq FROM Grant_Award WHERE Grant_Award.org_ticker IS NULL )x;"

#<ActiveRecord::Result:0x3bf5410
 @column_types={},
 @columns=[""],
 @hash_rows=nil,
 @rows=[["pass"]]>

Answer 2

我认为文件导入生成的语句应该是：

SELECT (CASE WHEN freq = 0 THEN 'pass' ELSE 'fail' END) FROM ( SELECT COUNT(*) freq FROM Grant_Award WHERE Grant_Award.org_ticker IS NULL );"

我认为语句末尾的 x 导致了错误，并想知道这是否错误地滑入了您的其他行。