It is triggered before a data query is started. It is used for both cases when data is already loaded and stored inside the component's local storage or when it is necessary to load data from the external data storage in case of OLAP data source. Data query is started when:
Any filter was used;
Slice was changed;
Drill up or drill down was used;
Columns or rows were expanded;
Drill through was used.
To make sure that running of the query was successful use querycomplete. To track any errors use queryerror.
Example
pivot.on('runningquery', function () { alert('Query is running!'); });
