Start-DbccCheck, better extraction of errors (#9624)

Author: niphlod

private/functions/Start-DbccCheck.ps1

@@ -10,7 +10,7 @@ function Start-DbccCheck {
     $servername = $server.name
 
     if ($Pscmdlet.ShouldProcess($sourceserver, "Running dbcc check on $DbName on $servername")) {
-        if ($server.ConnectionContext.StatementTimeout = 0 -ne 0) {
+        if ($server.ConnectionContext.StatementTimeout -ne 0) {
             $server.ConnectionContext.StatementTimeout = 0
         }
 
@@ -29,14 +29,34 @@ function Start-DbccCheck {
             }
             return "Success"
         } catch {
-            $message = $_.Exception
-            if ($null -ne $_.Exception.InnerException) { $message = $_.Exception.InnerException }
+            $originalException = $_.Exception
+            $loopNo = 0
+            while ($loopNo -ne 5) {
+                $loopNo ++
+                if ($null -ne $originalException.InnerException) {
+                    $originalException = $originalException.InnerException
+                } else {
+                    break
+                }
+            }
+            $message = $originalException.ToString()
 
             # english cleanup only sorry
             try {
-                $newmessage = ($message -split "at Microsoft.SqlServer.Management.Common.ConnectionManager.ExecuteTSql")[0]
-                $newmessage = ($newmessage -split "Microsoft.SqlServer.Management.Common.ExecutionFailureException:")[1]
-                $newmessage = ($newmessage -replace "An exception occurred while executing a Transact-SQL statement or batch. ---> Microsoft.Data.SqlClient.SqlException:").Trim()
+                $newmessage = $message
+                if ($newmessage -like '*at Microsoft.SqlServer.Management.Common.ConnectionManager.ExecuteTSql*') {
+                    $newmessage = ($newmessage -split "at Microsoft.SqlServer.Management.Common.ConnectionManager.ExecuteTSql")[0]
+                }
+                if ($newmessage -like '*Microsoft.SqlServer.Management.Common.ExecutionFailureException:*') {
+                    $newmessage = ($newmessage -split "Microsoft.SqlServer.Management.Common.ExecutionFailureException:")[1]
+                }
+                if ($newmessage -like '*An exception occurred while executing a Transact-SQL statement or batch. ---> Microsoft.Data.SqlClient.SqlException:*') {
+                    $newmessage = ($newmessage -replace "An exception occurred while executing a Transact-SQL statement or batch. ---> Microsoft.Data.SqlClient.SqlException:").Trim()
+                }
+                if ($newmessage -like '*An exception occurred while executing a Transact-SQL statement or batch*') {
+                    $newmessage = ($newmessage -split "An exception occurred while executing a Transact-SQL statement or batch")[1]
+                }
+
                 $message = $newmessage
             } catch {
                 $null