mirror of
https://github.com/phpbb/phpbb.git
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664 lines
17 KiB
PHP
664 lines
17 KiB
PHP
<?php
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/**
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*
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* @package dbal
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* @version $Id$
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* @copyright (c) 2005 phpBB Group
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* @license http://opensource.org/licenses/gpl-license.php GNU Public License
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*
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*/
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/**
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* @ignore
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*/
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if (!defined('IN_PHPBB'))
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{
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exit;
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}
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/**
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* Oracle Database Abstraction Layer
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* Minimum Requirement: 9.2+
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* @package dbal
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*/
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class phpbb_dbal_oracle extends phpbb_dbal
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{
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/**
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* @var string Database type. No distinction between versions or used extensions.
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*/
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public $dbms_type = 'oracle';
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/**
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* @var array Database type map, column layout information
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*/
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public $dbms_type_map = array(
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'INT:' => 'number(%d)',
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'BINT' => 'number(20)',
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'UINT' => 'number(8)',
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'UINT:' => 'number(%d)',
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'TINT:' => 'number(%d)',
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'USINT' => 'number(4)',
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'BOOL' => 'number(1)',
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'VCHAR' => 'varchar2(255)',
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'VCHAR:' => 'varchar2(%d)',
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'CHAR:' => 'char(%d)',
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'XSTEXT' => 'varchar2(1000)',
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'STEXT' => 'varchar2(3000)',
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'TEXT' => 'clob',
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'MTEXT' => 'clob',
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'XSTEXT_UNI'=> 'varchar2(300)',
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'STEXT_UNI' => 'varchar2(765)',
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'TEXT_UNI' => 'clob',
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'MTEXT_UNI' => 'clob',
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'TIMESTAMP' => 'number(11)',
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'DECIMAL' => 'number(5, 2)',
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'DECIMAL:' => 'number(%d, 2)',
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'PDECIMAL' => 'number(6, 3)',
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'PDECIMAL:' => 'number(%d, 3)',
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'VCHAR_UNI' => 'varchar2(255)',
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'VCHAR_UNI:'=> array('varchar2(%d)', 'limit' => array('mult', 3, 765, 'clob')),
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'VARBINARY' => 'raw(255)',
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);
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/**
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* @var string Last query executed. We need this for sql_nextid()
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*/
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var $last_query_text = '';
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/**
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* Connect to server. See {@link phpbb_dbal::sql_connect() sql_connect()} for details.
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*/
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public function sql_connect($server, $user, $password, $database, $port = false, $persistency = false , $new_link = false)
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{
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$this->persistency = $persistency;
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$this->user = $user;
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$this->server = $server . (($port) ? ':' . $port : '');
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$this->dbname = $database;
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$this->port = $port;
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$connect = $database;
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// support for "easy connect naming"
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if ($server !== '' && $server !== '/')
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{
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if (substr($server, -1, 1) == '/')
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{
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$server == substr($sqlserver, 0, -1);
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}
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$connect = $server . (($port) ? ':' . $port : '') . '/' . $database;
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}
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$this->db_connect_id = ($new_link) ? @oci_new_connect($this->user, $password, $connect, 'AL32UTF8') : (($this->persistency) ? @oci_pconnect($this->user, $password, $connect, 'AL32UTF8') : @oci_connect($this->user, $password, $connect, 'AL32UTF8'));
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return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');
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}
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/**
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* Version information about used database. See {@link phpbb_dbal::sql_server_info() sql_server_info()} for details.
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*/
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public function sql_server_info($raw = false)
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{
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if (!phpbb::registered('acm') || ($this->sql_server_version = phpbb::$acm->get('#oracle_version')) === false)
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{
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$sql = "SELECT value
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FROM NLS_DATABASE_PARAMETERS
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WHERE PARAMETER = 'NLS_RDBMS_VERSION'";
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$result = @ociparse($this->db_connect_id, $sql);
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@ociexecute($result, OCI_DEFAULT);
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@ocicommit($this->db_connect_id);
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$row = array();
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@ocifetchinto($result, $row, OCI_ASSOC + OCI_RETURN_NULLS);
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@ocifreestatement($result);
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$this->sql_server_version = (isset($row['VALUE'])) ? trim($row['VALUE']) : 0;
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if (phpbb::registered('acm'))
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{
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phpbb::$acm->put('#oracle_version', $this->sql_server_version);
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}
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}
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return ($raw) ? $this->sql_server_version : @oci_server_version($this->db_connect_id);
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}
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/**
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* DB-specific base query method. See {@link phpbb_dbal::_sql_query() _sql_query()} for details.
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*/
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protected function _sql_query($query)
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{
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$this->last_query_text = $query;
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$in_transaction = false;
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if (!$this->transaction)
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{
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$this->sql_transaction('begin');
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}
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else
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{
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$in_transaction = true;
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}
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$array = array();
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// We overcome Oracle's 4000 char limit by binding vars
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if (strlen($query) > 4000)
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{
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if (preg_match('/^(INSERT INTO[^(]++)\\(([^()]+)\\) VALUES[^(]++\\((.*?)\\)$/s', $query, $regs))
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{
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if (strlen($regs[3]) > 4000)
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{
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$cols = explode(', ', $regs[2]);
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preg_match_all('/\'(?:[^\']++|\'\')*+\'|[\d-.]+/', $regs[3], $vals, PREG_PATTERN_ORDER);
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$inserts = $vals[0];
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unset($vals);
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foreach ($inserts as $key => $value)
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{
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// check to see if this thing is greater than the max + 'x2
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if (!empty($value) && $value[0] === "'" && strlen($value) > 4002)
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{
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$inserts[$key] = ':' . strtoupper($cols[$key]);
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$array[$inserts[$key]] = str_replace("''", "'", substr($value, 1, -1));
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}
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}
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$query = $regs[1] . '(' . $regs[2] . ') VALUES (' . implode(', ', $inserts) . ')';
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}
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}
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else if (preg_match_all('/^(UPDATE [\\w_]++\\s+SET )([\\w_]++\\s*=\\s*(?:\'(?:[^\']++|\'\')*+\'|[\d-.]+)(?:,\\s*[\\w_]++\\s*=\\s*(?:\'(?:[^\']++|\'\')*+\'|[\d-.]+))*+)\\s+(WHERE.*)$/s', $query, $data, PREG_SET_ORDER))
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{
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if (strlen($data[0][2]) > 4000)
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{
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$update = $data[0][1];
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$where = $data[0][3];
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preg_match_all('/([\\w_]++)\\s*=\\s*(\'(?:[^\']++|\'\')*+\'|[\d-.]++)/', $data[0][2], $temp, PREG_SET_ORDER);
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unset($data);
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$cols = array();
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foreach ($temp as $value)
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{
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// check to see if this thing is greater than the max + 'x2
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if (!empty($value[2]) && $value[2][0] === "'" && strlen($value[2]) > 4002)
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{
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$cols[] = $value[1] . '=:' . strtoupper($value[1]);
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$array[$value[1]] = str_replace("''", "'", substr($value[2], 1, -1));
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}
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else
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{
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$cols[] = $value[1] . '=' . $value[2];
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}
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}
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$query = $update . implode(', ', $cols) . ' ' . $where;
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unset($cols);
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}
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}
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}
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switch (substr($query, 0, 6))
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{
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case 'DELETE':
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if (preg_match('/^(DELETE FROM [\w_]++ WHERE)((?:\s*(?:AND|OR)?\s*[\w_]+\s*(?:(?:=|<>)\s*(?>\'(?>[^\']++|\'\')*+\'|[\d-.]+)|(?:NOT )?IN\s*\((?>\'(?>[^\']++|\'\')*+\',? ?|[\d-.]+,? ?)*+\)))*+)$/', $query, $regs))
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{
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$query = $regs[1] . $this->_rewrite_where($regs[2]);
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unset($regs);
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}
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break;
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case 'UPDATE':
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if (preg_match('/^(UPDATE [\\w_]++\\s+SET [\\w_]+\s*=\s*(?:\'(?:[^\']++|\'\')*+\'|[\d-.]++|:\w++)(?:, [\\w_]+\s*=\s*(?:\'(?:[^\']++|\'\')*+\'|[\d-.]++|:\w++))*+\\s+WHERE)(.*)$/s', $query, $regs))
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{
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$query = $regs[1] . $this->_rewrite_where($regs[2]);
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unset($regs);
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}
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break;
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case 'SELECT':
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$query = preg_replace_callback('/([\w_.]++)\s*(?:(=|<>)\s*(?>\'(?>[^\']++|\'\')*+\'|[\d-.]++|([\w_.]++))|(?:NOT )?IN\s*\((?>\'(?>[^\']++|\'\')*+\',? ?|[\d-.]++,? ?)*+\))/', array($this, '_rewrite_col_compare'), $query);
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break;
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}
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$result = @oci_parse($this->db_connect_id, $query);
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if (!$result)
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{
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return false;
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}
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foreach ($array as $key => $value)
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{
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@oci_bind_by_name($result, $key, $array[$key], -1);
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}
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$success = @oci_execute($result, OCI_DEFAULT);
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if (!$success)
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{
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return false;
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}
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if (!$in_transaction)
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{
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$this->sql_transaction('commit');
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}
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return $result;
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}
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/**
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* Build LIMIT query and run it. See {@link phpbb_dbal::_sql_query_limit() _sql_query_limit()} for details.
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*/
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protected function _sql_query_limit($query, $total, $offset, $cache_ttl)
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{
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$query = 'SELECT * FROM (SELECT /*+ FIRST_ROWS */ rownum AS xrownum, a.* FROM (' . $query . ') a WHERE rownum <= ' . ($offset + $total) . ') WHERE xrownum >= ' . $offset;
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return $this->sql_query($query, $cache_ttl);
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}
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/**
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* Close sql connection. See {@link phpbb_dbal::_sql_close() _sql_close()} for details.
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*/
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protected function _sql_close()
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{
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return @oci_close($this->db_connect_id);
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}
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/**
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* SQL Transaction. See {@link phpbb_dbal::_sql_transaction() _sql_transaction()} for details.
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*/
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protected function _sql_transaction($status)
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{
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switch ($status)
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{
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case 'begin':
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return true;
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break;
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case 'commit':
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return @oci_commit($this->db_connect_id);
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break;
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case 'rollback':
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return @oci_rollback($this->db_connect_id);
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break;
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}
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return true;
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}
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/**
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* Return number of affected rows. See {@link phpbb_dbal::sql_affectedrows() sql_affectedrows()} for details.
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*/
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public function sql_affectedrows()
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{
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return ($this->query_result) ? @oci_num_rows($this->query_result) : false;
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}
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/**
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* Get last inserted id after insert statement. See {@link phpbb_dbal::sql_nextid() sql_nextid()} for details.
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*/
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public function sql_nextid()
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{
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if (!$this->query_result || !$this->last_query_text)
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{
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return false;
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}
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if (preg_match('#^INSERT[\t\n ]+INTO[\t\n ]+([a-z0-9\_\-]+)#is', $this->last_query_text, $tablename))
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{
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$query = 'SELECT ' . $tablename[1] . '_seq.currval FROM DUAL';
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$stmt = @oci_parse($this->db_connect_id, $query);
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@oci_execute($stmt, OCI_DEFAULT);
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$temp_array = @oci_fetch_array($stmt, OCI_ASSOC + OCI_RETURN_NULLS);
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@oci_free_statement($stmt);
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return (isset($temp_array['CURRVAL'])) ? $temp_array['CURRVAL'] : false;
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}
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return false;
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}
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/**
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* Fetch current row. See {@link phpbb_dbal::_sql_fetchrow() _sql_fetchrow()} for details.
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*/
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protected function _sql_fetchrow($query_id)
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{
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$row = @oci_fetch_array($query_id, OCI_ASSOC + OCI_RETURN_NULLS);
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if (!$row)
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{
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return false;
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}
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$result_row = array();
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foreach ($row as $key => $value)
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{
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// Oracle treats empty strings as null
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if (is_null($value))
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{
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$value = '';
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}
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// OCI->CLOB?
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if (is_object($value))
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{
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$value = $value->load();
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}
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$result_row[strtolower($key)] = $value;
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}
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return $result_row;
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}
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/**
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* Free query result. See {@link phpbb_dbal::_sql_freeresult() _sql_freeresult()} for details.
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*/
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protected function _sql_freeresult($query_id)
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{
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return @oci_free_statement($query_id);
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}
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/**
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* Correctly adjust LIKE expression for special characters. See {@link phpbb_dbal::_sql_like_expression() _sql_like_expression()} for details.
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*/
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protected function _sql_like_expression($expression)
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{
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return $expression . " ESCAPE '\\'";
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}
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/**
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* Escape string used in sql query. See {@link phpbb_dbal::sql_escape() sql_escape()} for details.
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*/
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public function sql_escape($msg)
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{
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return str_replace(array("'", "\0"), array("''", ''), $msg);
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}
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/**
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* Expose a DBMS specific function. See {@link phpbb_dbal::sql_function() sql_function()} for details.
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*/
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public function sql_function($type, $col)
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{
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switch ($type)
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{
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case 'length_varchar':
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return 'LENGTH(' . $col . ')';
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break;
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case 'length_text':
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return 'dbms_lob.getlength(' . $col . ')';
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break;
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}
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}
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/**
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* Handle data by using prepared statements. See {@link phpbb_dbal::sql_handle_data() sql_handle_data()} for details.
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public function sql_handle_data($type, $table, $data, $where = '')
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{
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if ($type === 'INSERT')
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{
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$stmt = oci_parse($this->db_connect_id, "INSERT INTO $table (". implode(', ', array_keys($data)) . ") VALUES (:" . implode(', :', array_keys($data)) . ')');
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}
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else
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{
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$query = "UPDATE $table SET ";
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$set = array();
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foreach (array_keys($data) as $key)
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{
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$set[] = "$key = :$key";
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}
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$query .= implode(', ', $set);
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if ($where !== '')
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{
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$query .= $where;
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}
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$stmt = oci_parse($this->db_connect_id, $query);
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}
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foreach ($data as $column => $value)
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{
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oci_bind_by_name($stmt, ":$column", $data[$column], -1);
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}
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oci_execute($stmt);
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}
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*/
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/**
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* Build DB-specific query bits. See {@link phpbb_dbal::_sql_custom_build() _sql_custom_build()} for details.
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*/
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protected function _sql_custom_build($stage, $data)
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{
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return $data;
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}
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/**
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* return sql error array. See {@link phpbb_dbal::_sql_error() _sql_error()} for details.
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*/
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protected function _sql_error()
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{
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$error = @oci_error();
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$error = (empty($error)) ? @oci_error($this->query_result) : $error;
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$error = (empty($error)) ? @oci_error($this->db_connect_id) : $error;
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|
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if (empty($error))
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{
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$error = array(
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'message' => '',
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'code' => '',
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);
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}
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return $error;
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}
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/**
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* Run DB-specific code to build SQL Report to explain queries, show statistics and runtime information. See {@link phpbb_dbal::_sql_report() _sql_report()} for details.
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*/
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protected function _sql_report($mode, $query = '')
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{
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switch ($mode)
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{
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case 'start':
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$html_table = false;
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// Grab a plan table, any will do
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$sql = "SELECT table_name
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FROM USER_TABLES
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WHERE table_name LIKE '%PLAN_TABLE%'";
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$stmt = @oci_parse($this->db_connect_id, $sql);
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@oci_execute($stmt);
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$result = array();
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if ($result = @oci_fetch_array($stmt, OCI_ASSOC + OCI_RETURN_NULLS))
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{
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$table = $result['TABLE_NAME'];
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// This is the statement_id that will allow us to track the plan
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$statement_id = substr(md5($query), 0, 30);
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// Remove any stale plans
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$stmt2 = @oci_parse($this->db_connect_id, "DELETE FROM $table WHERE statement_id='$statement_id'");
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@oci_execute($stmt2);
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@oci_free_statement($stmt2);
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// Explain the plan
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$sql = "EXPLAIN PLAN
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SET STATEMENT_ID = '$statement_id'
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FOR $query";
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$stmt2 = @ociparse($this->db_connect_id, $sql);
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@oci_execute($stmt2);
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@oci_free_statement($stmt2);
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|
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// Get the data from the plan
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|
$sql = "SELECT operation, options, object_name, object_type, cardinality, cost
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FROM plan_table
|
|
START WITH id = 0 AND statement_id = '$statement_id'
|
|
CONNECT BY PRIOR id = parent_id
|
|
AND statement_id = '$statement_id'";
|
|
$stmt2 = @oci_parse($this->db_connect_id, $sql);
|
|
@oci_execute($stmt2);
|
|
|
|
$row = array();
|
|
while ($row = @oci_fetch_array($stmt2, OCI_ASSOC + OCI_RETURN_NULLS))
|
|
{
|
|
$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
|
|
}
|
|
@oci_free_statement($stmt2);
|
|
|
|
// Remove the plan we just made, we delete them on request anyway
|
|
$stmt2 = @oci_parse($this->db_connect_id, "DELETE FROM $table WHERE statement_id='$statement_id'");
|
|
@oci_execute($stmt2);
|
|
@oci_free_statement($stmt2);
|
|
}
|
|
|
|
@oci_free_statement($stmt);
|
|
|
|
if ($html_table)
|
|
{
|
|
$this->html_hold .= '</table>';
|
|
}
|
|
|
|
break;
|
|
|
|
case 'fromcache':
|
|
$endtime = explode(' ', microtime());
|
|
$endtime = $endtime[0] + $endtime[1];
|
|
|
|
$result = @oci_parse($this->db_connect_id, $query);
|
|
$success = @oci_execute($result, OCI_DEFAULT);
|
|
$row = array();
|
|
|
|
while ($void = @oci_fetch_array($result, OCI_ASSOC + OCI_RETURN_NULLS))
|
|
{
|
|
// Take the time spent on parsing rows into account
|
|
}
|
|
@oci_free_statement($result);
|
|
|
|
$splittime = explode(' ', microtime());
|
|
$splittime = $splittime[0] + $splittime[1];
|
|
|
|
$this->sql_report('record_fromcache', $query, $endtime, $splittime);
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Oracle specific code to handle the fact that it does not compare columns properly
|
|
* @access private
|
|
*/
|
|
private function _rewrite_col_compare($args)
|
|
{
|
|
if (sizeof($args) == 4)
|
|
{
|
|
if ($args[2] == '=')
|
|
{
|
|
return '(' . $args[0] . ' OR (' . $args[1] . ' is NULL AND ' . $args[3] . ' is NULL))';
|
|
}
|
|
else if ($args[2] == '<>')
|
|
{
|
|
// really just a fancy way of saying foo <> bar or (foo is NULL XOR bar is NULL) but SQL has no XOR :P
|
|
return '(' . $args[0] . ' OR ((' . $args[1] . ' is NULL AND ' . $args[3] . ' is NOT NULL) OR (' . $args[1] . ' is NOT NULL AND ' . $args[3] . ' is NULL)))';
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return $this->_rewrite_where($args[0]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Oracle specific code to handle it's lack of sanity
|
|
* @access private
|
|
*/
|
|
private function _rewrite_where($where_clause)
|
|
{
|
|
preg_match_all('/\s*(AND|OR)?\s*([\w_.]++)\s*(?:(=|<[=>]?|>=?)\s*((?>\'(?>[^\']++|\'\')*+\'|[\d-.]+))|((NOT )?IN\s*\((?>\'(?>[^\']++|\'\')*+\',? ?|[\d-.]+,? ?)*+\)))/', $where_clause, $result, PREG_SET_ORDER);
|
|
$out = '';
|
|
|
|
foreach ($result as $val)
|
|
{
|
|
if (!isset($val[5]))
|
|
{
|
|
if ($val[4] !== "''")
|
|
{
|
|
$out .= $val[0];
|
|
}
|
|
else
|
|
{
|
|
$out .= ' ' . $val[1] . ' ' . $val[2];
|
|
if ($val[3] == '=')
|
|
{
|
|
$out .= ' is NULL';
|
|
}
|
|
else if ($val[3] == '<>')
|
|
{
|
|
$out .= ' is NOT NULL';
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
$in_clause = array();
|
|
$sub_exp = substr($val[5], strpos($val[5], '(') + 1, -1);
|
|
$extra = false;
|
|
preg_match_all('/\'(?>[^\']++|\'\')*+\'|[\d-.]++/', $sub_exp, $sub_vals, PREG_PATTERN_ORDER);
|
|
$i = 0;
|
|
|
|
foreach ($sub_vals[0] as $sub_val)
|
|
{
|
|
// two things:
|
|
// 1) This determines if an empty string was in the IN clausing, making us turn it into a NULL comparison
|
|
// 2) This fixes the 1000 list limit that Oracle has (ORA-01795)
|
|
if ($sub_val !== "''")
|
|
{
|
|
$in_clause[(int) $i++/1000][] = $sub_val;
|
|
}
|
|
else
|
|
{
|
|
$extra = true;
|
|
}
|
|
}
|
|
|
|
if (!$extra && $i < 1000)
|
|
{
|
|
$out .= $val[0];
|
|
}
|
|
else
|
|
{
|
|
$out .= ' ' . $val[1] . '(';
|
|
$in_array = array();
|
|
|
|
// constuct each IN() clause
|
|
foreach ($in_clause as $in_values)
|
|
{
|
|
$in_array[] = $val[2] . ' ' . (isset($val[6]) ? $val[6] : '') . 'IN(' . implode(', ', $in_values) . ')';
|
|
}
|
|
|
|
// Join the IN() clauses against a few ORs (IN is just a nicer OR anyway)
|
|
$out .= implode(' OR ', $in_array);
|
|
|
|
// handle the empty string case
|
|
if ($extra)
|
|
{
|
|
$out .= ' OR ' . $val[2] . ' is ' . (isset($val[6]) ? $val[6] : '') . 'NULL';
|
|
}
|
|
$out .= ')';
|
|
|
|
unset($in_array, $in_clause);
|
|
}
|
|
}
|
|
}
|
|
|
|
return $out;
|
|
}
|
|
}
|
|
|
|
?>
|