Correct use criteria with use count and join.

model/SqlCriteria.php

@@ -70,6 +70,7 @@ class SqlCriteria
                 $this->sql_expression = 'SELECT ' . $select . ' FROM :table';
             }
             $this->sql_expression .= ' ' . implode(' ', $this->sql_join_expressions);
+	        $this->sql_join_expressions = null;
         }
     }
 
@@ -80,13 +81,17 @@ class SqlCriteria
 
     public function count()
     {
-        if ($this->sql_expression && strpos($this->sql_expression, 'COUNT(*) as count')) {
-            ;
+	    $this->defineJoinExpressions();
+	    $sql_expression_backup = $this->sql_expression;
+        if ($this->sql_expression) {
+	        $select = $this->model->getDb()->selectExpr($this->select, $this->distinct);
+            $this->sql_expression = str_replace($select, 'COUNT(*) as count', $this->sql_expression);
         } else {
             $this->sql_expression = 'SELECT COUNT(*) as count FROM :table';
         }
-        $this->defineJoinExpressions();
-        return $this->model->find(array(), '', $this->where, null, null, null, null, $this->sql_expression, $this->sql_expression_params)->fetchField('count');
+        $count = $this->model->find(array(), '', $this->where, null, null, null, null, $this->sql_expression, $this->sql_expression_params)->fetchField('count');
+	    $this->sql_expression = $sql_expression_backup;
+	    return $count;
     }
 
     private function defineJoinTablePlaceholder($table_name)