$.udb(ds).mainDataSource()

note

This article is about the mainDataSource() function of the DataSourceContainer object.

$.udb(ds).mainDataSource()

Gets the data source that the first data source in the container looks up to, provided that data source is a lookup data source. If the first data source is not a lookup data source, the function returns that data source itself.

Returns a UdbDsc object.

Syntax

$.udb( *ds* ).mainDataSource()

The required ds parameter is a data source selector.

Example

let lookupDsc = $.udb('DEPT_LOOKUP');
let main = lookupDsc.mainDataSource();

console.log('%s looks up its values from %s', lookupDsc.name(), main.name());