Explain queries without placeholders

lib/active_record/connection_adapters/sqlserver/core_ext/explain.rb

@@ -3,34 +3,36 @@ module ConnectionAdapters
     module Sqlserver
       module CoreExt
         module Explain
-          
+
           SQLSERVER_STATEMENT_PREFIX = "EXEC sp_executesql "
           SQLSERVER_PARAM_MATCHER = /@\d+ =/
-          
+
           def exec_explain(queries)
             unprepared_queries = queries.map { |sql, bind| [unprepare_sqlserver_statement(sql), bind] }
             super(unprepared_queries)
           end
-          
+
           private
-          
-          # This is somewhat hacky, but it should reliably reformat our prepared sql statment 
-          # which uses sp_executesql to just the first argument, then unquote it. Likewise our 
+
+          # This is somewhat hacky, but it should reliably reformat our prepared sql statment
+          # which uses sp_executesql to just the first argument, then unquote it. Likewise our
           # do_exec_query method should substitude the @n args withe the quoted values.
           def unprepare_sqlserver_statement(sql)
             if sql.starts_with?(SQLSERVER_STATEMENT_PREFIX)
               executesql = sql.from(SQLSERVER_STATEMENT_PREFIX.length)
               executesql_args = executesql.split(', ')
-              executesql_args.reject! { |arg| arg =~ SQLSERVER_PARAM_MATCHER }
-              executesql_args.pop if executesql_args.many?
+              has_sqlserver_params = executesql_args.reject! { |arg| arg =~ SQLSERVER_PARAM_MATCHER }
+              if has_sqlserver_params
+                executesql_args.pop if executesql_args.many?
+              end
               executesql = executesql_args.join(', ').strip.match(/N'(.*)'/)[1]
               Utils.unquote_string(executesql)
             else
               sql
             end
           end
-          
-          
+
+
         end
       end
     end