Bugs item #13355, was opened at 2007-08-25 04:39
You can respond by visiting:
http://rubyforge.org/tracker/?func=detail&atid=7857&aid=13355&group_id=2014
Category: AR-JDBC
Group: None
Status: Open
Resolution: None
Priority: 3
Submitted By: Nobody (None)
Assigned to: Nobody (None)
Summary: add_limit_offset in SQL Server 2005
Initial Comment:
I'm using ActiveRecord-JDBC with SQL Server 2005. I found the attached
implementation of add_limit_offset to be more efficient than the one included
in version 0.5. The downside is that it will not work with SQL Server 2000.
Maybe there's some way to distribute both versions of the adapter.
def add_limit_offset!(sql, options)
if limit = options[:limit] and offset = options[:offset]
if options[:order]
sql.sub!(/(SELECT.*)(\s+ORDER BY.*)/i) do
"SELECT B.* FROM (SELECT A.*, ROW_NUMBER() over (ORDER BY
#{options[:order]}) AS internal$rownum FROM (#{$1}) A ) B WHERE
B.internal$rownum > #{offset} AND B.internal$rownum <= #{limit + offset}#{$2}"
end
else
sql.sub!(/(SELECT.*)/i) do
"SELECT B.* FROM (SELECT A.*, ROW_NUMBER() over (ORDER BY
internal$const) AS internal$rownum FROM (SELECT C.*, 1 AS internal$const FROM (
#{$1} ) C ) A ) B WHERE B.internal$rownum > #{offset} AND B.internal$rownum <=
#{limit + offset}"
end
end
elsif sql !~ /^\s*SELECT (@@|COUNT\()/i
sql.sub!(/^\s*SELECT([\s]*distinct)?/i) do
"SELECT#{$1} TOP #{options[:limit]}"
end unless options[:limit].nil?
end
end
----------------------------------------------------------------------
>Comment By: Nick Sieger (nicksieger)
Date: 2008-04-16 21:40
Message:
Is there a way to detect which server version you're running?
----------------------------------------------------------------------
You can respond by visiting:
http://rubyforge.org/tracker/?func=detail&atid=7857&aid=13355&group_id=2014
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