Class: JDBCHelper::Connection::ResultSet

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/jdbc-helper/connection/result_set.rb

Overview

Automatically closed after used. When not used, you must close it explicitly by calling “close”.

Instance Method Summary collapse

Instance Method Details

#close ⇒ Object 



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# File 'lib/jdbc-helper/connection/result_set.rb', line 53

def close
  return if closed?

  @rset.close
  @close_callback.call if @close_callback
  @closed = true
end

#closed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jdbc-helper/connection/result_set.rb', line 61

def closed?
  @closed
end

#each ⇒ Object 



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# File 'lib/jdbc-helper/connection/result_set.rb', line 13

def each
  return enum_for(:each) unless block_given?
  return if closed?

  while @nrow
    idx = 0
    # Oracle returns numbers in NUMERIC type, which can be of any precision.
    # So, we retrieve the numbers in String type not to lose their precision.
    # This can be quite annoying when you're just working with integers,
    # so I tried the following code to automatically convert integer string into integer
    # when it's obvious. However, the performance drop is untolerable.
    # Thus, commented out.
    #
    # if v && @cols_meta[i-1] == java.sql.Types::NUMERIC && v !~ /[\.e]/i
    #   v.to_i
    # else
    #   v
    # end
    row = Connection::Row.new(
        @col_labels,
        @col_labels_d,
        @getters.map { |gt|
          case gt
          when :getBigNum
            v = @rset.getBigDecimal idx+=1
            @rset.was_null ? nil : v.toPlainString.to_i
          when :getBigDecimal
            v = @rset.getBigDecimal idx+=1
            @rset.was_null ? nil : BigDecimal.new(v.toPlainString)
          else
            v = @rset.send gt, idx+=1
            @rset.was_null ? nil : v
          end
        }, @rownum += 1)
    close unless @nrow = @rset.next
    yield row
  end
  close
end