Exclude isLedger property check for Azure DBs for improving OE nodes expansion perf (#1798)

src/Microsoft.SqlTools.ServiceLayer/ObjectExplorer/SmoModel/SmoDatabaseCustomNode.cs

@@ -4,8 +4,11 @@
 //
 
 using System.Collections.Generic;
+using Microsoft.SqlTools.Utility;
 using Microsoft.SqlServer.Management.Smo;
 using Microsoft.SqlTools.ServiceLayer.ObjectExplorer.Nodes;
+using System.Diagnostics;
+using System;
 
 namespace Microsoft.SqlTools.ServiceLayer.ObjectExplorer.SmoModel
 {
@@ -35,14 +38,15 @@ namespace Microsoft.SqlTools.ServiceLayer.ObjectExplorer.SmoModel
             try
             {
                 Database? db = smoObject as Database;
-                if (db != null && IsPropertySupported("IsLedger", smoContext, db, CachedSmoProperties) && db.IsLedger)
+                if (db != null && IsPropertySupported(nameof(db.IsLedger), smoContext, db, CachedSmoProperties) && db.IsLedger)
                 {
                     return "Ledger";
                 }
             }
-            catch
+            catch (Exception e)
             {
                 //Ignore the exception and just not change create custom name
+                Logger.Write(TraceEventType.Verbose, $"Error ignored when reading node subtype: {e.Message}");
             }
 
             return string.Empty;

src/Microsoft.SqlTools.ServiceLayer/ObjectExplorer/SmoModel/SmoTreeNodes.cs

@@ -213,6 +213,11 @@ namespace Microsoft.SqlTools.ServiceLayer.ObjectExplorer.SmoModel
                    Name = "Status",
                    ValidFor = ValidForFlag.All
                 });
+                properties.Add(new NodeSmoProperty
+                {
+                   Name = "IsLedger",
+                   ValidFor = ValidForFlag.AllOnPrem
+                });
                 return properties;
             }
         }

src/Microsoft.SqlTools.ServiceLayer/ObjectExplorer/SmoModel/SmoTreeNodesDefinition.xml

@@ -11,6 +11,9 @@
     </Filters>
     <Properties>
       <Property Name="Status" ValidFor="All"/>
+      <!--IsLedger property check is disabled on Azure databases to avoid making connections to databases individually
+       when listing databases in Object Explorer since it's value is not available from 'master' DB for all databases.-->
+      <Property Name="IsLedger" ValidFor="AllOnPrem"/>
     </Properties>
     <Child Name="SystemDatabases" IsSystemObject="1"/>
   </Node>