set table name in case when pk is not nil

Author: X1ting

lib/active_record/connection_adapters/sqlserver/database_statements.rb

@@ -228,6 +228,7 @@ def sql_for_insert(sql, pk, id_value, sequence_name, binds)
           end
           sql = if pk && use_output_inserted? && !database_prefix_remote_server?
                   quoted_pk = SQLServer::Utils.extract_identifiers(pk).quoted
+                  table_name ||= get_table_name(sql)
                   exclude_output_inserted = exclude_output_inserted_table_name?(table_name, sql)
                   if exclude_output_inserted
                     id_sql_type = exclude_output_inserted.is_a?(TrueClass) ? 'bigint' : exclude_output_inserted