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由 David Heinemeier Hansson 提交于
Added the possibility for adapters to overwrite add_limit! to implement a different limiting scheme than "LIMIT X" used by MySQL, PostgreSQL, and SQLite. git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@269 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
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