MarkLogic 12 Product Documentation

op:col

op:col(
   $colName as string
) as map:map

Summary

Identifies a column where the column name is unique and a qualifier on the column name isn't necessary (and might not exist).

In positions where only a column name can appear, the unqualified column name can also be provided as a string. Qualified column names cannot be provided as a string.

The returned value from this function can be modified by any of the functions described in Expression Functions For Processing Column Values in the Application Developer's Guide

Example

(: Rows with a EmployeeID greater than 3 :)

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

let $employees := op:from-view("main", "employees")
return $employees
  => op:where(op:gt(op:col("EmployeeID")),3)
  => op:result()