-<?php

-/**

-*

-* @package dbal

-* @copyright (c) 2005 phpBB Group

-* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2

-*

-*/

-

-/**

-* @ignore

-*/

-if (!defined('IN_PHPBB'))

-{

- exit;

-}

-

-include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);

-

-/**

-* Oracle Database Abstraction Layer

-* @package dbal

-*/

-class dbal_oracle extends dbal

-{

- var $last_query_text = '';

-

- /**

- * Connect to server

- */

- function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)

- {

- $this->persistency = $persistency;

- $this->user = $sqluser;

- $this->server = $sqlserver . (($port) ? ':' . $port : '');

- $this->dbname = $database;

-

- $connect = $database;

-

- // support for "easy connect naming"

- if ($sqlserver !== '' && $sqlserver !== '/')

- {

- if (substr($sqlserver, -1, 1) == '/')

- {

- $sqlserver == substr($sqlserver, 0, -1);

- }

- $connect = $sqlserver . (($port) ? ':' . $port : '') . '/' . $database;

- }

-

- $this->db_connect_id = ($new_link) ? @ocinlogon($this->user, $sqlpassword, $connect, 'UTF8') : (($this->persistency) ? @ociplogon($this->user, $sqlpassword, $connect, 'UTF8') : @ocilogon($this->user, $sqlpassword, $connect, 'UTF8'));

-

- return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');

- }

-

- /**

- * Version information about used database

- * @param bool $raw if true, only return the fetched sql_server_version

- * @param bool $use_cache forced to false for Oracle

- * @return string sql server version

- */

- function sql_server_info($raw = false, $use_cache = true)

- {

- /**

- * force $use_cache false. I didn't research why the caching code below is commented out

- * but I assume its because the Oracle extension provides a direct method to access it

- * without a query.

- */

-

- $use_cache = false;

-/*

- global $cache;

-

- if (empty($cache) || ($this->sql_server_version = $cache->get('oracle_version')) === false)

- {

- $result = @ociparse($this->db_connect_id, 'SELECT * FROM v$version WHERE banner LIKE \'Oracle%\'');

- @ociexecute($result, OCI_DEFAULT);

- @ocicommit($this->db_connect_id);

-

- $row = array();

- @ocifetchinto($result, $row, OCI_ASSOC + OCI_RETURN_NULLS);

- @ocifreestatement($result);

- $this->sql_server_version = trim($row['BANNER']);

-

- $cache->put('oracle_version', $this->sql_server_version);

- }

-*/

- $this->sql_server_version = @ociserverversion($this->db_connect_id);

-

- return $this->sql_server_version;

- }

-

- /**

- * SQL Transaction

- * @access private

- */

- function _sql_transaction($status = 'begin')

- {

- switch ($status)

- {

- case 'begin':

- return true;

- break;

-

- case 'commit':

- return @ocicommit($this->db_connect_id);

- break;

-

- case 'rollback':

- return @ocirollback($this->db_connect_id);

- break;

- }

-

- return true;

- }

-

- /**

- * Oracle specific code to handle the fact that it does not compare columns properly

- * @access 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

- */

- function _rewrite_where($where_clause)

- {

- preg_match_all('/\s*(AND|OR)?\s*([\w_.()]++)\s*(?:(=|<[=>]?|>=?|LIKE)\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;

- }

-

- /**

- * Base query method

- *

- * @param string $query Contains the SQL query which shall be executed

- * @param int $cache_ttl Either 0 to avoid caching or the time in seconds which the result shall be kept in cache

- * @return mixed When casted to bool the returned value returns true on success and false on failure

- *

- * @access public

- */

- function sql_query($query = '', $cache_ttl = 0)

- {

- if ($query != '')

- {

- global $cache;

-

- // EXPLAIN only in extra debug mode

- if (defined('DEBUG_EXTRA'))

- {

- $this->sql_report('start', $query);

- }

-

- $this->last_query_text = $query;

- $this->query_result = ($cache_ttl && method_exists($cache, 'sql_load')) ? $cache->sql_load($query) : false;

- $this->sql_add_num_queries($this->query_result);

-

- if ($this->query_result === false)

- {

- $in_transaction = false;

- if (!$this->transaction)

- {

- $this->sql_transaction('begin');

- }

- else

- {

- $in_transaction = true;

- }

-

- $array = array();

-

- // We overcome Oracle's 4000 char limit by binding vars

- if (strlen($query) > 4000)

- {

- if (preg_match('/^(INSERT INTO[^(]++)\\(([^()]+)\\) VALUES[^(]++\\((.*?)\\)$/sU', $query, $regs))

- {

- if (strlen($regs[3]) > 4000)

- {

- $cols = explode(', ', $regs[2]);

-

- preg_match_all('/\'(?:[^\']++|\'\')*+\'|[\d-.]+/', $regs[3], $vals, PREG_PATTERN_ORDER);

-

-/* The code inside this comment block breaks clob handling, but does allow the

- database restore script to work. If you want to allow no posts longer than 4KB

- and/or need the db restore script, uncomment this.

-

-

- if (sizeof($cols) !== sizeof($vals))

- {

- // Try to replace some common data we know is from our restore script or from other sources

- $regs[3] = str_replace("'||chr(47)||'", '/', $regs[3]);

- $_vals = explode(', ', $regs[3]);

-

- $vals = array();

- $is_in_val = false;

- $i = 0;

- $string = '';

-

- foreach ($_vals as $value)

- {

- if (strpos($value, "'") === false && !$is_in_val)

- {

- $vals[$i++] = $value;

- continue;

- }

-

- if (substr($value, -1) === "'")

- {

- $vals[$i] = $string . (($is_in_val) ? ', ' : '') . $value;

- $string = '';

- $is_in_val = false;

-

- if ($vals[$i][0] !== "'")

- {

- $vals[$i] = "''" . $vals[$i];

- }

- $i++;

- continue;

- }

- else

- {

- $string .= (($is_in_val) ? ', ' : '') . $value;

- $is_in_val = true;

- }

- }

-

- if ($string)

- {

- // New value if cols != value

- $vals[(sizeof($cols) !== sizeof($vals)) ? $i : $i - 1] .= $string;

- }

-

- $vals = array(0 => $vals);

- }

-*/

-

- $inserts = $vals[0];

- unset($vals);

-

- foreach ($inserts as $key => $value)

- {

- if (!empty($value) && $value[0] === "'" && strlen($value) > 4002) // check to see if this thing is greater than the max + 'x2

- {

- $inserts[$key] = ':' . strtoupper($cols[$key]);

- $array[$inserts[$key]] = str_replace("''", "'", substr($value, 1, -1));

- }

- }

-

- $query = $regs[1] . '(' . $regs[2] . ') VALUES (' . implode(', ', $inserts) . ')';

- }

- }

- 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))

- {

- if (strlen($data[0][2]) > 4000)

- {

- $update = $data[0][1];

- $where = $data[0][3];

- preg_match_all('/([\\w_]++)\\s*=\\s*(\'(?:[^\']++|\'\')*+\'|[\d-.]++)/', $data[0][2], $temp, PREG_SET_ORDER);

- unset($data);

-

- $cols = array();

- foreach ($temp as $value)

- {

- if (!empty($value[2]) && $value[2][0] === "'" && strlen($value[2]) > 4002) // check to see if this thing is greater than the max + 'x2

- {

- $cols[] = $value[1] . '=:' . strtoupper($value[1]);

- $array[$value[1]] = str_replace("''", "'", substr($value[2], 1, -1));

- }

- else

- {

- $cols[] = $value[1] . '=' . $value[2];

- }

- }

-

- $query = $update . implode(', ', $cols) . ' ' . $where;

- unset($cols);

- }

- }

- }

-

- switch (substr($query, 0, 6))

- {

- case 'DELETE':

- if (preg_match('/^(DELETE FROM [\w_]++ WHERE)((?:\s*(?:AND|OR)?\s*[\w_]+\s*(?:(?:=|<>)\s*(?>\'(?>[^\']++|\'\')*+\'|[\d-.]+)|(?:NOT )?IN\s*\((?>\'(?>[^\']++|\'\')*+\',? ?|[\d-.]+,? ?)*+\)))*+)$/', $query, $regs))

- {

- $query = $regs[1] . $this->_rewrite_where($regs[2]);

- unset($regs);

- }

- break;

-

- case 'UPDATE':

- if (preg_match('/^(UPDATE [\\w_]++\\s+SET [\\w_]+\s*=\s*(?:\'(?:[^\']++|\'\')*+\'|[\d-.]++|:\w++)(?:, [\\w_]+\s*=\s*(?:\'(?:[^\']++|\'\')*+\'|[\d-.]++|:\w++))*+\\s+WHERE)(.*)$/s', $query, $regs))

- {

- $query = $regs[1] . $this->_rewrite_where($regs[2]);

- unset($regs);

- }

- break;

-

- case 'SELECT':

- $query = preg_replace_callback('/([\w_.]++)\s*(?:(=|<>)\s*(?>\'(?>[^\']++|\'\')*+\'|[\d-.]++|([\w_.]++))|(?:NOT )?IN\s*\((?>\'(?>[^\']++|\'\')*+\',? ?|[\d-.]++,? ?)*+\))/', array($this, '_rewrite_col_compare'), $query);

- break;

- }

-

- $this->query_result = @ociparse($this->db_connect_id, $query);

-

- foreach ($array as $key => $value)

- {

- @ocibindbyname($this->query_result, $key, $array[$key], -1);

- }

-

- $success = @ociexecute($this->query_result, OCI_DEFAULT);

-

- if (!$success)

- {

- $this->sql_error($query);

- $this->query_result = false;

- }

- else

- {

- if (!$in_transaction)

- {

- $this->sql_transaction('commit');

- }

- }

-

- if (defined('DEBUG_EXTRA'))

- {

- $this->sql_report('stop', $query);

- }

-

- if ($cache_ttl && method_exists($cache, 'sql_save'))

- {

- $this->open_queries[(int) $this->query_result] = $this->query_result;

- $cache->sql_save($query, $this->query_result, $cache_ttl);

- }

- else if (strpos($query, 'SELECT') === 0 && $this->query_result)

- {

- $this->open_queries[(int) $this->query_result] = $this->query_result;

- }

- }

- else if (defined('DEBUG_EXTRA'))

- {

- $this->sql_report('fromcache', $query);

- }

- }

- else

- {

- return false;

- }

-

- return $this->query_result;

- }

-

- /**

- * Build LIMIT query

- */

- function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)

- {

- $this->query_result = false;

-

- $query = 'SELECT * FROM (SELECT /*+ FIRST_ROWS */ rownum AS xrownum, a.* FROM (' . $query . ') a WHERE rownum <= ' . ($offset + $total) . ') WHERE xrownum >= ' . $offset;

-

- return $this->sql_query($query, $cache_ttl);

- }

-

- /**

- * Return number of affected rows

- */

- function sql_affectedrows()

- {

- return ($this->query_result) ? @ocirowcount($this->query_result) : false;

- }

-

- /**

- * Fetch current row

- */

- function sql_fetchrow($query_id = false)

- {

- global $cache;

-

- if ($query_id === false)

- {

- $query_id = $this->query_result;

- }

-

- if (isset($cache->sql_rowset[$query_id]))

- {

- return $cache->sql_fetchrow($query_id);

- }

-

- if ($query_id !== false)

- {

- $row = array();

- $result = @ocifetchinto($query_id, $row, OCI_ASSOC + OCI_RETURN_NULLS);

-

- if (!$result || !$row)

- {

- return false;

- }

-

- $result_row = array();

- foreach ($row as $key => $value)

- {

- // Oracle treats empty strings as null

- if (is_null($value))

- {

- $value = '';

- }

-

- // OCI->CLOB?

- if (is_object($value))

- {

- $value = $value->load();

- }

-

- $result_row[strtolower($key)] = $value;

- }

-

- return $result_row;

- }

-

- return false;

- }

-

- /**

- * Seek to given row number

- * rownum is zero-based

- */

- function sql_rowseek($rownum, &$query_id)

- {

- global $cache;

-

- if ($query_id === false)

- {

- $query_id = $this->query_result;

- }

-

- if (isset($cache->sql_rowset[$query_id]))

- {

- return $cache->sql_rowseek($rownum, $query_id);

- }

-

- if ($query_id === false)

- {

- return false;

- }

-

- // Reset internal pointer

- @ociexecute($query_id, OCI_DEFAULT);

-

- // We do not fetch the row for rownum == 0 because then the next resultset would be the second row

- for ($i = 0; $i < $rownum; $i++)

- {

- if (!$this->sql_fetchrow($query_id))

- {

- return false;

- }

- }

-

- return true;

- }

-

- /**

- * Get last inserted id after insert statement

- */

- function sql_nextid()

- {

- $query_id = $this->query_result;

-

- if ($query_id !== false && $this->last_query_text != '')

- {

- if (preg_match('#^INSERT[\t\n ]+INTO[\t\n ]+([a-z0-9\_\-]+)#is', $this->last_query_text, $tablename))

- {

- $query = 'SELECT ' . $tablename[1] . '_seq.currval FROM DUAL';

- $stmt = @ociparse($this->db_connect_id, $query);

- @ociexecute($stmt, OCI_DEFAULT);

-

- $temp_result = @ocifetchinto($stmt, $temp_array, OCI_ASSOC + OCI_RETURN_NULLS);

- @ocifreestatement($stmt);

-

- if ($temp_result)

- {

- return $temp_array['CURRVAL'];

- }

- else

- {

- return false;

- }

- }

- }

-

- return false;

- }

-

- /**

- * Free sql result

- */

- function sql_freeresult($query_id = false)

- {

- global $cache;

-

- if ($query_id === false)

- {

- $query_id = $this->query_result;

- }

-

- if (isset($cache->sql_rowset[$query_id]))

- {

- return $cache->sql_freeresult($query_id);

- }

-

- if (isset($this->open_queries[(int) $query_id]))

- {

- unset($this->open_queries[(int) $query_id]);

- return @ocifreestatement($query_id);

- }

-

- return false;

- }

-

- /**

- * Escape string used in sql query

- */

- function sql_escape($msg)

- {

- return str_replace(array("'", "\0"), array("''", ''), $msg);

- }

-

- /**

- * Build LIKE expression

- * @access private

- */

- function _sql_like_expression($expression)

- {

- return $expression . " ESCAPE '\\'";

- }

-

- function _sql_custom_build($stage, $data)

- {

- return $data;

- }

-

- function _sql_bit_and($column_name, $bit, $compare = '')

- {

- return 'BITAND(' . $column_name . ', ' . (1 << $bit) . ')' . (($compare) ? ' ' . $compare : '');

- }

-

- function _sql_bit_or($column_name, $bit, $compare = '')

- {

- return 'BITOR(' . $column_name . ', ' . (1 << $bit) . ')' . (($compare) ? ' ' . $compare : '');

- }

-

- /**

- * return sql error array

- * @access private

- */

- function _sql_error()

- {

- $error = @ocierror();

- $error = (!$error) ? @ocierror($this->query_result) : $error;

- $error = (!$error) ? @ocierror($this->db_connect_id) : $error;

-

- if ($error)

- {

- $this->last_error_result = $error;

- }

- else

- {

- $error = (isset($this->last_error_result) && $this->last_error_result) ? $this->last_error_result : array();

- }

-

- return $error;

- }

-

- /**

- * Close sql connection

- * @access private

- */

- function _sql_close()

- {

- return @ocilogoff($this->db_connect_id);

- }

-

- /**

- * Build db-specific report

- * @access private

- */

- function _sql_report($mode, $query = '')

- {

- switch ($mode)

- {

- case 'start':

-

- $html_table = false;

-

- // Grab a plan table, any will do

- $sql = "SELECT table_name

- FROM USER_TABLES

- WHERE table_name LIKE '%PLAN_TABLE%'";

- $stmt = ociparse($this->db_connect_id, $sql);

- ociexecute($stmt);

- $result = array();

-

- if (ocifetchinto($stmt, $result, OCI_ASSOC + OCI_RETURN_NULLS))

- {

- $table = $result['TABLE_NAME'];

-

- // This is the statement_id that will allow us to track the plan

- $statement_id = substr(md5($query), 0, 30);

-

- // Remove any stale plans

- $stmt2 = ociparse($this->db_connect_id, "DELETE FROM $table WHERE statement_id='$statement_id'");

- ociexecute($stmt2);

- ocifreestatement($stmt2);

-

- // Explain the plan

- $sql = "EXPLAIN PLAN

- SET STATEMENT_ID = '$statement_id'

- FOR $query";

- $stmt2 = ociparse($this->db_connect_id, $sql);

- ociexecute($stmt2);

- ocifreestatement($stmt2);

-

- // Get the data from the plan

- $sql = "SELECT operation, options, object_name, object_type, cardinality, cost

- FROM plan_table

- START WITH id = 0 AND statement_id = '$statement_id'

- CONNECT BY PRIOR id = parent_id

- AND statement_id = '$statement_id'";

- $stmt2 = ociparse($this->db_connect_id, $sql);

- ociexecute($stmt2);

-

- $row = array();

- while (ocifetchinto($stmt2, $row, OCI_ASSOC + OCI_RETURN_NULLS))

- {

- $html_table = $this->sql_report('add_select_row', $query, $html_table, $row);

- }

-

- ocifreestatement($stmt2);

-

- // Remove the plan we just made, we delete them on request anyway

- $stmt2 = ociparse($this->db_connect_id, "DELETE FROM $table WHERE statement_id='$statement_id'");

- ociexecute($stmt2);

- ocifreestatement($stmt2);

- }

-

- ocifreestatement($stmt);

-

- if ($html_table)

- {

- $this->html_hold .= '</table>';

- }

-

- break;

-

- case 'fromcache':

- $endtime = explode(' ', microtime());

- $endtime = $endtime[0] + $endtime[1];

-

- $result = @ociparse($this->db_connect_id, $query);

- $success = @ociexecute($result, OCI_DEFAULT);

- $row = array();

-

- while (@ocifetchinto($result, $row, OCI_ASSOC + OCI_RETURN_NULLS))

- {

- // Take the time spent on parsing rows into account

- }

- @ocifreestatement($result);

-

- $splittime = explode(' ', microtime());

- $splittime = $splittime[0] + $splittime[1];

-

- $this->sql_report('record_fromcache', $query, $endtime, $splittime);

-

- break;

- }

- }

-}