MarkLogic 9 Product Documentation

op:add

op:add(
   $left as item(),
   $right as item()
) as map:map

Summary

This function returns the sum of the specified numeric expressions. In expressions, the call should pass the result from an op:col function to identify a column.

The op:add function differs from the op:sum function in that it operates on operates on multiple column values in a row, rather than a group of rows.

As a convenience, you can pass a sequence of any number of expressions as the first argument: op:add((expr1, expr2, ..., exprN))

Example

xquery version "1.0-ml";

import module namespace op="http://marklogic.com/optic"
     at "/MarkLogic/optic.xqy";

let $employees := op:from-view("main", "employees")
 
return $employees
   => op:offset-limit(op:param('start'), op:param('length'))
   => op:select(('EmployeeID', 
                  op:as('incremented', 
                        op:add(op:col('EmployeeID'), 
                        op:param('increment')))
                ))
   => op:result((), map:entry("start",1)=>map:with("length",2)=>map:with("increment",1))