-<?php

-/**

-*

-* @package dbal

-* @version $Id$

-* @copyright (c) 2009 phpBB Group

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

-*

-*/

-

-/**

-* @ignore

-*/

-if (!defined('IN_PHPBB'))

-{

- exit;

-}

-

-/**

-* MSSQL Database Abstraction Layer

-* Minimum Requirement: DB2 8.2.2+

-* Minimum extension version: PECL ibm_db2 1.6.0+

-* @package dbal

-*/

-class phpbb_dbal_db2 extends phpbb_dbal

-{

- /**

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

- */

- public $dbms_type = 'db2';

-

- /**

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

- */

- public $dbms_type_map = array(

- 'INT:' => 'integer',

- 'BINT' => 'float',

- 'UINT' => 'integer',

- 'UINT:' => 'integer',

- 'TINT:' => 'smallint',

- 'USINT' => 'smallint',

- 'BOOL' => 'smallint',

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

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

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

- 'XSTEXT' => 'clob(65K)',

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

- 'TEXT' => 'clob(65K)',

- 'MTEXT' => 'clob(16M)',

- 'XSTEXT_UNI'=> 'varchar(100)',

- 'STEXT_UNI' => 'varchar(255)',

- 'TEXT_UNI' => 'clob(65K)',

- 'MTEXT_UNI' => 'clob(16M)',

- 'TIMESTAMP' => 'integer',

- 'DECIMAL' => 'float',

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

- 'VCHAR_UNI:'=> 'varchar(%d)',

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

- );

-

- /**

- * @var array Database features

- */

- public $features = array(

- 'multi_insert' => true,

- 'count_distinct' => true,

- 'multi_table_deletion' => true,

- 'truncate' => false,

- );

-

- /**

- * 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;

-

- $this->db_connect_id = ($this->persistency) ? @db2_pconnect($this->dbname, $this->user, $password, array('autocommit' => DB2_AUTOCOMMIT_ON, 'DB2_ATTR_CASE' => DB2_CASE_LOWER)) : @db2_connect($this->dbname, $this->user, $password, array('autocommit' => DB2_AUTOCOMMIT_ON, 'DB2_ATTR_CASE' => DB2_CASE_LOWER));

-

- 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('#db2_version')) === false)

- {

- $info = @db2_server_info($this->db_connect_id);

-

- $this->sql_server_info = is_object($info) ? $info->DBMS_VER : 0;

-

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

- {

- phpbb::$acm->put('#db2_version', $this->sql_server_version);

- }

- }

-

- return ($raw) ? $this->sql_server_version : 'IBM DB2 ' . $this->sql_server_version;

- }

-

- /**

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

- */

- protected function _sql_query($query)

- {

- $array = array();

-

- // Cope with queries larger than 32K

- if (strlen($query) > 32740)

- {

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

- {

- if (strlen($regs[3]) > 32740)

- {

- 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) > 32742)

- {

- $inserts[$key] = '?';

- $array[] = str_replace("''", "'", substr($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][3]) > 32740)

- {

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

- $where = $data[0][4];

- preg_match_all('/(\\w++) = (\'(?:[^\']++|\'\')*+\'|\\d++)/', $data[0][3], $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]) > 32742)

- {

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

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

- }

- else

- {

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

- }

- }

-

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

- unset($cols);

- }

- }

- }

-

- if (sizeof($array))

- {

- $result = @db2_prepare($this->db_connect_id, $query);

-

- if (!$result)

- {

- return false;

- }

-

- if (!@db2_execute($result, $array))

- {

- return false;

- }

- }

- else

- {

- $result = @db2_exec($this->db_connect_id, $query);

- }

-

- 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)

- {

- if ($total && $offset == 0)

- {

- return $this->sql_query($query . ' fetch first ' . $total . ' rows only', $cache_ttl);

- }

-

- // Seek by $offset rows

- if ($offset)

- {

- $limit_sql = 'SELECT a2.*

- FROM (

- SELECT ROW_NUMBER() OVER() AS rownum, a1.*

- FROM (

- ' . $query . '

- ) a1

- ) a2

- WHERE a2.rownum BETWEEN ' . ($offset + 1) . ' AND ' . ($offset + $total);

-

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

- }

-

- 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 @db2_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 @db2_autocommit($this->db_connect_id, DB2_AUTOCOMMIT_OFF);

- break;

-

- case 'commit':

- $result = @db2_commit($this->db_connect_id);

- @db2_autocommit($this->db_connect_id, DB2_AUTOCOMMIT_ON);

- return $result;

- break;

-

- case 'rollback':

- $result = @db2_rollback($this->db_connect_id);

- @db2_autocommit($this->db_connect_id, DB2_AUTOCOMMIT_ON);

- return $result;

- break;

- }

-

- return true;

- }

-

- /**

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

- */

- public function sql_affectedrows()

- {

- return ($this->db_connect_id) ? @db2_num_rows($this->db_connect_id) : false;

- }

-

- /**

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

- */

- public function sql_nextid()

- {

- if (function_exists('db2_last_insert_id'))

- {

- return @db2_last_insert_id($this->db_connect_id);

- }

-

- $result_id = @db2_exec($this->db_connect_id, 'VALUES IDENTITY_VAL_LOCAL()');

-

- if ($result_id)

- {

- if ($row = @db2_fetch_assoc($result_id))

- {

- @db2_free_result($result_id);

- return (int) $row[1];

- }

- @db2_free_result($result_id);

- }

-

- return false;

- }

-

- /**

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

- */

- protected function _sql_fetchrow($query_id)

- {

- return @db2_fetch_assoc($query_id);

- }

-

- /**

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

- */

- protected function _sql_freeresult($query_id)

- {

- return @db2_free_result($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 @db2_escape_string($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':

- case 'length_text':

- return 'LENGTH(' . $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')

- {

- $stmt = db2_prepare($this->db_connect_id, "INSERT INTO $table (". implode(', ', array_keys($data)) . ") VALUES (" . substr(str_repeat('?, ', sizeof($data)) ,0, -1) . ')');

- }

- else

- {

- $query = "UPDATE $table SET ";

-

- $set = array();

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

- {

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

- }

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

-

- if ($where !== '')

- {

- $query .= $where;

- }

-

- $stmt = db2_prepare($this->db_connect_id, $query);

- }

-

- // get the stmt onto the top of the function arguments

- array_unshift($data, $stmt);

-

- call_user_func_array('db2_execute', $data);

- }

- */

-

- /**

- * 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()

- {

- $message = @db2_stmt_errormsg();

- $code = @db2_stmt_error();

-

- if (!$message && !$code)

- {

- $message = @db2_conn_errormsg();

- $code = @db2_conn_error();

- }

-

- $error = array(

- 'message' => $message,

- 'code' => $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;

- @db2_exec($this->db_connect_id, 'DELETE FROM EXPLAIN_INSTANCE');

- @db2_exec($this->db_connect_id, 'EXPLAIN PLAN FOR ' . $query);

-

- // Get the data from the plan

- $sql = "SELECT O.Operator_ID, S2.Target_ID, O.Operator_Type, S.Object_Name, CAST(O.Total_Cost AS INTEGER) Cost

- FROM EXPLAIN_OPERATOR O

- LEFT OUTER JOIN EXPLAIN_STREAM S2 ON O.Operator_ID = S2.Source_ID

- LEFT OUTER JOIN EXPLAIN_STREAM S ON O.Operator_ID = S.Target_ID AND O.Explain_Time = S.Explain_Time AND S.Object_Name IS NOT NULL

- ORDER BY O.Explain_Time ASC, Operator_ID ASC";

- $query_id = @db2_exec($this->db_connect_id, $sql);

-

- if ($query_id)

- {

- while ($row = @db2_fetch_assoc($query_id))

- {

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

- }

-

- @db2_free_result($query_id);

- }

-

- if ($html_table)

- {

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

- }

- break;

-

- case 'fromcache':

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

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

-

- $result = @db2_exec($this->db_connect_id, $query);

- while ($void = @db2_fetch_assoc($result, IBASE_TEXT))

- {

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

- }

- @db2_free_result($result);

-

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

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

-

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

-

- break;

- }

- }

-}

-

-?> \ No newline at end of file