C:/xampp/htdocs/moodle/lib/dml/oci_native_moodle_temptables.php

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<?php

// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

defined('MOODLE_INTERNAL') || die();

require_once($CFG->libdir.'/dml/moodle_temptables.php');

class oci_native_moodle_temptables extends moodle_temptables {

    protected $unique_session_id; // To store unique_session_id. Needed for temp tables unique naming (upto 24cc)
    protected $counter; // To get incrementally different temptable names on each add_temptable() request

    public function __construct($mdb, $unique_session_id) {
        $this->unique_session_id = $unique_session_id;
        $this->counter = 1;
        parent::__construct($mdb);
    }

    public function add_temptable($tablename) {
        // TODO: throw exception if exists: if ($this->is_temptable...
        $this->temptables[$tablename] = $this->prefix . $this->unique_session_id . $this->counter;
        $this->counter++;
    }
}