-<?php

-/**

-*

-* @package dbal

-* @version $Id$

-* @copyright (c) 2005 phpBB Group

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

-*

-*/

-

-/**

-* @ignore

-*/

-if (!defined('IN_PHPBB'))

-{

- exit;

-}

-

-/**

-* Oracle Database Abstraction Layer

-* Minimum Requirement: 9.2+

-* @package dbal

-*/

-class phpbb_dbal_oracle extends phpbb_dbal

-{

- /**

- * @var string Database type. No distinction between versions or used extensions.

- */

- public $dbms_type = 'oracle';

-

- /**

- * @var array Database type map, column layout information

- */

- public $dbms_type_map = array(

- 'INT:' => 'number(%d)',

- 'BINT' => 'number(20)',

- 'UINT' => 'number(8)',

- 'UINT:' => 'number(%d)',

- 'TINT:' => 'number(%d)',

- 'USINT' => 'number(4)',

- 'BOOL' => 'number(1)',

- 'VCHAR' => 'varchar2(255)',

- 'VCHAR:' => 'varchar2(%d)',

- 'CHAR:' => 'char(%d)',

- 'XSTEXT' => 'varchar2(1000)',

- 'STEXT' => 'varchar2(3000)',

- 'TEXT' => 'clob',

- 'MTEXT' => 'clob',

- 'XSTEXT_UNI'=> 'varchar2(300)',

- 'STEXT_UNI' => 'varchar2(765)',

- 'TEXT_UNI' => 'clob',

- 'MTEXT_UNI' => 'clob',

- 'TIMESTAMP' => 'number(11)',

- 'DECIMAL' => 'number(5, 2)',

- 'DECIMAL:' => 'number(%d, 2)',

- 'PDECIMAL' => 'number(6, 3)',

- 'PDECIMAL:' => 'number(%d, 3)',

- 'VCHAR_UNI' => 'varchar2(255)',

- 'VCHAR_UNI:'=> array('varchar2(%d)', 'limit' => array('mult', 3, 765, 'clob')),

- 'VARBINARY' => 'raw(255)',

- );

-

- /**

- * @var string Last query executed. We need this for sql_nextid()

- */

- var $last_query_text = '';

-

- /**

- * Connect to server. See {@link phpbb_dbal::sql_connect() sql_connect()} for details.

- */

- public function sql_connect($server, $user, $password, $database, $port = false, $persistency = false , $new_link = false)

- {

- $this->persistency = $persistency;

- $this->user = $user;

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

- $this->dbname = $database;

- $this->port = $port;

-

- $connect = $database;

-

- // support for "easy connect naming"

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

- {

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

- {

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

- }

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

- }

-

- $this->db_connect_id = ($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'));

-

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

- }

-

- /**

- * Version information about used database. See {@link phpbb_dbal::sql_server_info() sql_server_info()} for details.

- */

- public function sql_server_info($raw = false)

- {

- if (!phpbb::registered('acm') || ($this->sql_server_version = phpbb::$acm->get('#oracle_version')) === false)

- {

- $sql = "SELECT value

- FROM NLS_DATABASE_PARAMETERS

- WHERE PARAMETER = 'NLS_RDBMS_VERSION'";

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

- @ociexecute($result, OCI_DEFAULT);

- @ocicommit($this->db_connect_id);

-

- $row = array();

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

- @ocifreestatement($result);

-

- $this->sql_server_version = (isset($row['VALUE'])) ? trim($row['VALUE']) : 0;

-

- if (phpbb::registered('acm'))

- {

- phpbb::$acm->put('#oracle_version', $this->sql_server_version);

- }

- }

-

- return ($raw) ? $this->sql_server_version : @oci_server_version($this->db_connect_id);

- }

-

- /**

- * DB-specific base query method. See {@link phpbb_dbal::_sql_query() _sql_query()} for details.

- */

- protected function _sql_query($query)

- {

- $this->last_query_text = $query;

-

- $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[^(]++\\((.*?)\\)$/s', $query, $regs))

- {

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

- {

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

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

-

- $inserts = $vals[0];

- unset($vals);

-

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

- {

- // check to see if this thing is greater than the max + 'x2

- if (!empty($value) && $value[0] === "'" && strlen($value) > 4002)

- {

- $inserts[$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)

- {

- // check to see if this thing is greater than the max + 'x2

- if (!empty($value[2]) && $value[2][0] === "'" && strlen($value[2]) > 4002)

- {

- $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;

- }

-

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

-

- if (!$result)

- {

- return false;

- }

-

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

- {

- @oci_bind_by_name($result, $key, $array[$key], -1);

- }

-

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

-

- if (!$success)

- {

- return false;

- }

-

- if (!$in_transaction)

- {

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

- }

-

- return $result;

- }

-

- /**

- * Build LIMIT query and run it. See {@link phpbb_dbal::_sql_query_limit() _sql_query_limit()} for details.

- */

- protected function _sql_query_limit($query, $total, $offset, $cache_ttl)

- {

- $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);

- }

-

- /**

- * Close sql connection. See {@link phpbb_dbal::_sql_close() _sql_close()} for details.

- */

- protected function _sql_close()

- {

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

- }

-

- /**

- * SQL Transaction. See {@link phpbb_dbal::_sql_transaction() _sql_transaction()} for details.

- */

- protected function _sql_transaction($status)

- {

- switch ($status)

- {

- case 'begin':

- return true;

- break;

-

- case 'commit':

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

- break;

-

- case 'rollback':

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

- break;

- }

-

- return true;

- }

-

- /**

- * Return number of affected rows. See {@link phpbb_dbal::sql_affectedrows() sql_affectedrows()} for details.

- */

- public function sql_affectedrows()

- {

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

- }

-

- /**

- * Get last inserted id after insert statement. See {@link phpbb_dbal::sql_nextid() sql_nextid()} for details.

- */

- public function sql_nextid()

- {

- if (!$this->query_result || !$this->last_query_text)

- {

- return false;

- }

-

- 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';

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

- @oci_execute($stmt, OCI_DEFAULT);

-

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

- @oci_free_statement($stmt);

-

- return (isset($temp_array['CURRVAL'])) ? $temp_array['CURRVAL'] : false;

- }

-

- return false;

- }

-

- /**

- * Fetch current row. See {@link phpbb_dbal::_sql_fetchrow() _sql_fetchrow()} for details.

- */

- protected function _sql_fetchrow($query_id)

- {

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

-

- if (!$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;

- }

-

- /**

- * Free query result. See {@link phpbb_dbal::_sql_freeresult() _sql_freeresult()} for details.

- */

- protected function _sql_freeresult($query_id)

- {

- return @oci_free_statement($query_id);

- }

-

- /**

- * Correctly adjust LIKE expression for special characters. See {@link phpbb_dbal::_sql_like_expression() _sql_like_expression()} for details.

- */

- protected function _sql_like_expression($expression)

- {

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

- }

-

- /**

- * Escape string used in sql query. See {@link phpbb_dbal::sql_escape() sql_escape()} for details.

- */

- public function sql_escape($msg)

- {

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

- }

-

- /**

- * Expose a DBMS specific function. See {@link phpbb_dbal::sql_function() sql_function()} for details.

- */

- public function sql_function($type, $col)

- {

- switch ($type)

- {

- case 'length_varchar':

- return 'LENGTH(' . $col . ')';

- break;

-

- case 'length_text':

- return 'dbms_lob.getlength(' . $col . ')';

- break;

- }

- }

-

- /**

- * Handle data by using prepared statements. See {@link phpbb_dbal::sql_handle_data() sql_handle_data()} for details.

- public function sql_handle_data($type, $table, $data, $where = '')

- {

- if ($type === 'INSERT')

- {

- $stmt = oci_parse($this->db_connect_id, "INSERT INTO $table (". implode(', ', array_keys($data)) . ") VALUES (:" . implode(', :', array_keys($data)) . ')');

- }

- else

- {

- $query = "UPDATE $table SET ";

-

- $set = array();

- foreach (array_keys($data) as $key)

- {

- $set[] = "$key = :$key";

- }

- $query .= implode(', ', $set);

-

- if ($where !== '')

- {

- $query .= $where;

- }

-

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

- }

-

- foreach ($data as $column => $value)

- {

- oci_bind_by_name($stmt, ":$column", $data[$column], -1);

- }

-

- oci_execute($stmt);

- }

- */

-

- /**

- * Build DB-specific query bits. See {@link phpbb_dbal::_sql_custom_build() _sql_custom_build()} for details.

- */

- protected function _sql_custom_build($stage, $data)

- {

- return $data;

- }

-

- /**

- * return sql error array. See {@link phpbb_dbal::_sql_error() _sql_error()} for details.

- */

- protected function _sql_error()

- {

- $error = @oci_error();

- $error = (empty($error)) ? @oci_error($this->query_result) : $error;

- $error = (empty($error)) ? @oci_error($this->db_connect_id) : $error;

-

- if (empty($error))

- {

- $error = array(

- 'message' => '',

- 'code' => '',

- );

- }

-

- return $error;

- }

-

- /**

- * 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.

- */

- protected 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%'";

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

- @oci_execute($stmt);

- $result = array();

-

- if ($result = @oci_fetch_array($stmt, 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

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

- @oci_execute($stmt2);

- @oci_free_statement($stmt2);

-

- // Explain the plan

- $sql = "EXPLAIN PLAN

- SET STATEMENT_ID = '$statement_id'

- FOR $query";

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

- @oci_execute($stmt2);

- @oci_free_statement($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'";

- $stmt2 = @oci_parse($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;

- }

-}

-

-?> \ No newline at end of file