diff --git a/controllets/select-visualization-controllet/select-visualization-controllet.html b/controllets/select-visualization-controllet/select-visualization-controllet.html
index 14dc754..ac4cb64 100755
--- a/controllets/select-visualization-controllet/select-visualization-controllet.html
+++ b/controllets/select-visualization-controllet/select-visualization-controllet.html
@@ -360,7 +360,14 @@
 
                 //use cache
                 var data = alasql_complexSelectData(this.data, this.selectedFields, [], inputs.getAggregators(), inputs.getOrders());
+
+                var converter = new DataTypeConverter();
+                var result = converter.inferJsonDataType(data, ["*"]);
+                result = converter.cast(result);
+                data = result.dataset;
+
                 data = transformData(data, this.selectedFields, true);
+
                 this.params["data"] = JSON.stringify(data).replace(/'/g, "'");
                 //
 
diff --git a/datalets/base-ajax-json-alasql-datalet/static/js/AjaxJsonAlasqlBehavior.js b/datalets/base-ajax-json-alasql-datalet/static/js/AjaxJsonAlasqlBehavior.js
index 90969a2..3757c6f 100755
--- a/datalets/base-ajax-json-alasql-datalet/static/js/AjaxJsonAlasqlBehavior.js
+++ b/datalets/base-ajax-json-alasql-datalet/static/js/AjaxJsonAlasqlBehavior.js
@@ -114,6 +114,7 @@ var AjaxJsonAlasqlBehavior = {
         //}
 
         var converter = new DataTypeConverter();
+
         var result = converter.inferJsonDataType(data, ["*"]);
         result = converter.cast(result);
         data = result.dataset;
@@ -126,6 +127,10 @@ var AjaxJsonAlasqlBehavior = {
 
         data = alasql_complexSelectData(data, fields, [], aggregators, orders);
 
+        result = converter.inferJsonDataType(data, ["*"]);
+        result = converter.cast(result);
+        data = result.dataset;
+
         this.data = transformData(data, fields, true);
 
         this._deleteWaitImage();