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copy_table_contents(from, to, columns, rename = {}) protected

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# File activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb, line 344
        def copy_table_contents(from, to, columns, rename = {}) #:nodoc:
          column_mappings = Hash[*columns.map {|name| [name, name]}.flatten]
          rename.inject(column_mappings) {|map, a| map[a.last] = a.first; map}
          from_columns = columns(from).collect {|col| col.name}
          columns = columns.find_all{|col| from_columns.include?(column_mappings[col])}
          quoted_columns = columns.map { |col| quote_column_name(col) } * ','

          quoted_to = quote_table_name(to)
          @connection.execute "SELECT * FROM #{quote_table_name(from)}" do |row|
            sql = "INSERT INTO #{quoted_to} (#{quoted_columns}) VALUES ("
            sql << columns.map {|col| quote row[column_mappings[col]]} * ', '
            sql << ')'
            @connection.execute sql
          end
        end
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