Lire::Sum(3) Lire class that implements the sum operator


use Lire::Sum


Class that implements the sum operator. This operator will compute the field's sum in a group of DLF records.

It's possible to compute a weighted sum in which each value is first multiplied by the value of another DLF field.

Its also possible to express the count as a ratio of the total count for the group or table.


new( %params )

Creates a new Lire::Count object. In addition to the values supported by its parents, the weight and ratio attributes will be initialized to the values specified in the %params argument.

weight( [$new_weight] )

Returns the DLF field's name by which the values will be multiplied before being summed.

You can change the weight field by specifying a new name as the $new_weight parameter. Use undef to remove the use of a weighting field.


Returns how the sum will be expressed. This can one of three possible values:
Default. The absolute sum will be used.
The sum will be expressed as a percentage of the group's sum.
The sum will be expressed as a percentage of the table's total sum.


  Francis J. Lacoste <[email protected]>


$Id:,v 1.17 2008/03/09 19:27:31 vanbaal Exp $


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