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149 lines
3.9 KiB
149 lines
3.9 KiB
<?php
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/*
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** Zabbix
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** Copyright (C) 2001-2023 Zabbix SIA
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**/
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/**
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* Database backend class for Oracle.
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*/
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class OracleDbBackend extends DbBackend {
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/**
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* Check if 'dbversion' table exists.
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*
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* @return boolean
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*/
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protected function checkDbVersionTable() {
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$table_exists = DBfetch(DBselect("SELECT table_name FROM all_tables WHERE table_name='DBVERSION'"));
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if (!$table_exists) {
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$this->setError(_s('Unable to determine current Zabbix database version: %1$s.',
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_s('the table "%1$s" was not found', 'dbversion')
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));
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return false;
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}
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return true;
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}
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/**
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* Check is current connection contain requested cipher list.
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*
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* @return bool
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*/
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public function isConnectionSecure() {
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$this->setError('Secure connection for Oracle is not supported.');
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return false;
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}
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/**
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* Create connection to database server.
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*
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* @param string $host Host name.
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* @param string $port Port.
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* @param string $user User name.
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* @param string $password Password.
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* @param string $dbname Database name.
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* @param string $schema DB schema.
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*
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* @param
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* @return resource|null
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*/
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public function connect($host, $port, $user, $password, $dbname, $schema) {
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$connect = '';
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if ($host) {
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$connect = '//'.$host.(($port) ? ':'.$port : '').(($dbname) ? '/'.$dbname : '');
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}
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elseif ($dbname) {
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$connect = $dbname;
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}
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$resource = @oci_connect($user, $password, $connect, 'UTF8');
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if (!$resource) {
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$ociError = oci_error();
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$this->setError('Error connecting to database: '.$ociError['message']);
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return null;
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}
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return $resource;
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}
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/**
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* Initialize connection.
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*
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* @return bool
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*/
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public function init() {
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DBexecute('ALTER SESSION SET NLS_NUMERIC_CHARACTERS='.zbx_dbstr('. '));
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}
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/**
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* Create INSERT SQL query.
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* Creation example:
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* BEGIN
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* INSERT INTO usrgrp (usrgrpid, name, gui_access, users_status, debug_mode)
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* VALUES ('20', 'admins', '1', '0', '1');
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* INSERT INTO usrgrp (usrgrpid, name, gui_access, users_status, debug_mode)
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* VALUES ('21', 'users', '0', '0', '0');
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* END;
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*/
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public function createInsertQuery($table, array $fields, array $values) {
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$sql = 'BEGIN';
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$fields = '('.implode(',', $fields).')';
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foreach ($values as $row) {
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$sql .= ' INSERT INTO '.$table.' '.$fields.' VALUES ('.implode(',', array_values($row)).');';
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}
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$sql .= ' END;';
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return $sql;
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}
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/**
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* Check database and table fields encoding.
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*
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* @return bool
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*/
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public function checkEncoding() {
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return $this->checkDatabaseEncoding();
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}
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/**
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* Check database schema encoding. On error will set warning message.
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*
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* @return bool
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*/
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protected function checkDatabaseEncoding() {
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$row = DBfetch(DBselect('SELECT value,parameter FROM NLS_DATABASE_PARAMETERS'.
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' WHERE '.dbConditionString('parameter', ['NLS_CHARACTERSET', 'NLS_NCHAR_CHARACTERSET']).
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' AND '.dbConditionString('value', [ORACLE_UTF8_CHARSET, ORACLE_CESU8_CHARSET], true)
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));
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if ($row) {
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$this->setWarning(_s('Incorrect parameter "%1$s" value: %2$s.', $row['parameter'],
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_s('"%1$s" instead "%2$s"', $row['value'], ORACLE_UTF8_CHARSET.', '.ORACLE_CESU8_CHARSET)
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));
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}
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return !$row;
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}
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}
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