topic Re: Error at simple QueryTask on large map service layer in ArcGIS JavaScript Maps SDK Questions

Error at simple QueryTask on large map service layer

PitersonPaulgek — Fri, 11 Nov 2016 01:37:31 GMT

Hi, we try to run simple QueryTask on large (1.5 million features) map service layer:

var queryTask = new QueryTask("someURL/arcgis/rest/services/Polygons2/MapServer/0");

var query = new Query();
query.returnGeometry = true;
query.outFields = ["Name1,Name2"];

query.where = "SomeID = 12345";
queryTask.execute(query, _showResults, _displayError);

_showResults = function (features) {
selectedGraphics.clear();

for (var i = 0; i < features.length; i++) {
var feature = features;
feature.symbol = HighlightSymbol;
selectedGraphics.add(feature);
}

_displayError = function (error) {
console.log(error);
alert("Error");
};

We have the error:

Please help to understand/fix the error.

Re: Error at simple QueryTask on large map service layer

RobertScheitlin__GISP — Fri, 11 Nov 2016 01:43:29 GMT

First thing I would do is verify that your query works just using the rest end point for the map service.

Re: Error at simple QueryTask on large map service layer

PitersonPaulgek — Fri, 11 Nov 2016 03:03:23 GMT

Robert, thank you.

I did.
Seems to be syntax error in the query.where.

Re: Error at simple QueryTask on large map service layer

RobertScheitlin__GISP — Fri, 11 Nov 2016 03:28:43 GMT

Is the field you are querying a string or numeric?

Re: Error at simple QueryTask on large map service layer

PitersonPaulgek — Fri, 11 Nov 2016 03:37:37 GMT

It is string.

The solution:

query.where = "SomeID = '12345'";

Re: Error at simple QueryTask on large map service layer

RobertScheitlin__GISP — Fri, 11 Nov 2016 03:40:16 GMT

Great.

Don't forget to mark this question as answered by clicking on the "Correct Answer" link on the reply that answered your question.