server/AyaNova/PickList/PickListSqlBuilder.cs

@@ -32,6 +32,9 @@ namespace AyaNova.PickList
             string ActiveSelectFragment = string.Empty;
             string ActiveWhereFragment = string.Empty;
 
+            string TagSpecificSelectFragment = string.Empty;
+            string TagSpecificWhereFragment = string.Empty;
+
             //PROCESS ROW ID "VALUE" COLUMN 
             //
             AyaPickListFieldDefinition rowIdColumn = pickList.ColumnDefinitions.FirstOrDefault(x => x.IsRowId == true);
@@ -70,6 +73,13 @@ namespace AyaNova.PickList
                 }
             }
 
+            //PROCESS TAG SPECIFIC QUERY
+            //
+            if(HasTagSpecificQuery){
+                //need a select and a where clause for tags apart from the rest
+                TagSpecificSelectFragment=""
+            }
+
 
             //PROCESS TEMPLATED COLUMNS TO BE RETURNED IN RESULTS
             //
@@ -93,7 +103,7 @@ namespace AyaNova.PickList
                     //TAGS COLUMN
                     //
                     if (o.ColumnDataType == UiFieldDataType.Tags)
-                    {                       
+                    {
                         lSelect.Add($"(array_to_string({valueColumnName},',')");
                         //tags can order by without the arraytostring
                         lOrderBy.Add(valueColumnName);

server/AyaNova/biz/PickListBiz.cs

@@ -111,6 +111,14 @@ namespace AyaNova.Biz
                 }
             }
 
+            //Final fixup if user specifies tag query but there are not tags on this object then
+            //rather than error just accept it as a no tag query
+            //Note: it's not valid to have more than one field with tags in the picklist definition so this works
+            if (PickList.ColumnDefinitions.FirstOrDefault(x => x.ColumnDataType == UiFieldDataType.Tags) == null)
+            {
+                TagSpecificQuery = null;
+            }
+
             //Autocomplete and tagonly query terms now set for consumption by PickListFetcher, ready to fetch...
             List<NameIdActiveItem> items = await PickListFetcher.GetResponseAsync(PickList, AutoCompleteQuery, TagSpecificQuery, inactive, ct);
             return items;