oracle插入数据失败

[bugZhang]

连接oracle数据库，Model调用add方法 最终执行Oracle.class.php里面的execute方法

public function execute($str, $fetchSql = false)
    {
        $this->initConnect(true);
        if (!$this->_linkID) {
            return false;
        }

        $this->queryStr = $str;
        if (!empty($this->bind)) {
            $that           = $this;
            $this->queryStr = strtr($this->queryStr, array_map(function ($val) use ($that) {return '\'' . $that->escapeString($val) . '\'';}, $this->bind));
        }
        if ($fetchSql) {
            return $this->queryStr;
        }
        $flag = false;
        if (preg_match("/^\s*(INSERT\s+INTO)\s+(\w+)\s+/i", $str, $match)) {
            $this->table = C("DB_SEQUENCE_PREFIX") . str_ireplace(C("DB_PREFIX"), "", $match[2]);
            $flag        = (boolean) $this->query("SELECT * FROM user_sequences WHERE sequence_name='" . strtoupper($this->table) . "'");
        }
        //释放前次的查询结果
        if (!empty($this->PDOStatement)) {
            $this->free();
        }

        $this->executeTimes++;
        N('db_write', 1); // 兼容代码
        // 记录开始执行时间
        $this->debug(true);
        $this->PDOStatement = $this->_linkID->prepare($str);
        if (false === $this->PDOStatement) {
            $this->error();
            return false;
        }
        foreach ($this->bind as $key => $val) {
            if (is_array($val)) {
                $this->PDOStatement->bindValue($key, $val[0], $val[1]);
            } else {
                $this->PDOStatement->bindValue($key, $val);
            }
        }
        $this->bind = array();
        $result     = $this->PDOStatement->execute();
        $this->debug(false);
        if (false === $result) {
            $this->error();
            return false;
        } else {
            $this->numRows = $this->PDOStatement->rowCount();
            if ($flag || preg_match("/^\s*(INSERT\s+INTO|REPLACE\s+INTO)\s+/i", $str)) {
                $this->lastInsID = $this->_linkID->lastInsertId();
            }
            return $this->numRows;
        }
    }

 $flag        = (boolean) $this->query("SELECT * FROM user_sequences WHERE sequence_name='" . strtoupper($this->table) . "'");

这一句条用了Oracle的父类Driver.class.php的query方法，而query方法中有一句这个$this->bind = array();导致execute在接下来执行中$this->bind 变量已经被清空，数据插入失败。