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431 lines
9.9 KiB
PHP
431 lines
9.9 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('SQL_LAYER'))
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{
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define('SQL_LAYER', 'mssql_odbc');
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include($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
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/**
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* @package dbal
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* MSSQL ODBC Database Abstraction Layer for MSSQL
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* Minimum Requirement is Version 2000+
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*/
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class dbal_mssql_odbc extends dbal
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{
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var $result_rowset = array();
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var $field_names = array();
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var $field_types = array();
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var $num_rows = array();
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var $current_row = array();
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function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false)
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{
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$this->persistency = $persistency;
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$this->user = $sqluser;
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$this->server = $sqlserver . (($port) ? ':' . $port : '');
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$this->dbname = $database;
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$this->db_connect_id = ($this->persistency) ? @odbc_pconnect($this->server, $this->user, $sqlpassword) : @odbc_connect($this->server, $this->user, $sqlpassword);
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return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');
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}
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//
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// Other base methods
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//
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function sql_close()
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{
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if (!$this->db_connect_id)
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{
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return false;
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}
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if ($this->transaction)
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{
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@odbc_commit($this->db_connect_id);
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}
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if (sizeof($this->result_rowset))
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{
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unset($this->result_rowset);
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unset($this->field_names);
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unset($this->field_types);
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unset($this->num_rows);
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unset($this->current_row);
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}
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if (sizeof($this->open_queries))
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{
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foreach ($this->open_queries as $i_query_id => $query_id)
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{
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@odbc_free_result($query_id);
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}
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}
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return @odbc_close($this->db_connect_id);
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}
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function sql_transaction($status = 'begin')
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{
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switch ($status)
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{
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case 'begin':
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$result = @odbc_autocommit($this->db_connect_id, false);
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$this->transaction = true;
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break;
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case 'commit':
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$result = @odbc_commit($this->db_connect_id);
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@odbc_autocommit($this->db_connect_id, true);
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$this->transaction = false;
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if (!$result)
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{
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@odbc_rollback($this->db_connect_id);
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@odbc_autocommit($this->db_connect_id, true);
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}
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break;
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case 'rollback':
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$result = @odbc_rollback($this->db_connect_id);
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@odbc_autocommit($this->db_connect_id, true);
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$this->transaction = false;
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break;
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default:
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$result = true;
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}
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return $result;
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}
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// Base query method
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function sql_query($query = '', $cache_ttl = 0)
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{
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if ($query != '')
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{
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global $cache;
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// EXPLAIN only in extra debug mode
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if (defined('DEBUG_EXTRA'))
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{
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$this->sql_report('start', $query);
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}
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$this->query_result = ($cache_ttl && method_exists($cache, 'sql_load')) ? $cache->sql_load($query) : false;
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if (!$this->query_result)
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{
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$this->num_queries++;
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if (($this->query_result = $this->_odbc_execute_query($query)) === false)
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{
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$this->sql_error($query);
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}
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if (defined('DEBUG_EXTRA'))
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{
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$this->sql_report('stop', $query);
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}
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if ($cache_ttl && method_exists($cache, 'sql_save'))
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{
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$this->open_queries[(int) $this->query_result] = $this->query_result;
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$cache->sql_save($query, $this->query_result, $cache_ttl);
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// odbc_free_result called within sql_save()
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}
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else if (strpos($query, 'SELECT') !== false && $this->query_result)
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{
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$this->open_queries[(int) $this->query_result] = $this->query_result;
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}
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}
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else if (defined('DEBUG_EXTRA'))
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{
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$this->sql_report('fromcache', $query);
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}
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}
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else
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{
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return false;
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}
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return ($this->query_result) ? $this->query_result : false;
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}
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function _odbc_execute_query($query)
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{
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$result = false;
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if (eregi("^SELECT ", $query))
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{
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$result = @odbc_exec($this->db_connect_id, $query);
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if ($result)
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{
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if (empty($this->field_names[$result]))
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{
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for ($i = 1, $j = @odbc_num_fields($result) + 1; $i < $j; $i++)
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{
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$this->field_names[$result][] = @odbc_field_name($result, $i);
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$this->field_types[$result][] = @odbc_field_type($result, $i);
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}
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}
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$this->current_row[$result] = 0;
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$this->result_rowset[$result] = array();
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$row_outer = (isset($row_offset)) ? $row_offset + 1 : 1;
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$row_outer_max = (isset($num_rows)) ? $row_offset + $num_rows + 1 : 1E9;
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$row_inner = 0;
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while (@odbc_fetch_row($result, $row_outer) && $row_outer < $row_outer_max)
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{
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for ($i = 0, $j = sizeof($this->field_names[$result]); $i < $j; $i++)
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{
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$this->result_rowset[$result][$row_inner][$this->field_names[$result][$i]] = stripslashes(@odbc_result($result, $i + 1));
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}
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$row_outer++;
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$row_inner++;
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}
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$this->num_rows[$result] = sizeof($this->result_rowset[$result]);
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}
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}
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else if (eregi("^INSERT ", $query))
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{
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$result = @odbc_exec($this->db_connect_id, $query);
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if ($result)
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{
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$result_id = @odbc_exec($this->db_connect_id, 'SELECT @@IDENTITY');
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if ($result_id)
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{
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if (@odbc_fetch_row($result_id))
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{
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$this->next_id[$this->db_connect_id] = @odbc_result($result_id, 1);
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$this->affected_rows[$this->db_connect_id] = @odbc_num_rows($result);
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}
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}
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}
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}
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else
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{
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$result = @odbc_exec($this->db_connect_id, $query);
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if ($result)
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{
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$this->affected_rows[$this->db_connect_id] = @odbc_num_rows($result);
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}
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}
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return $result;
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}
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function sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
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{
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if ($query != '')
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{
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$this->query_result = false;
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// if $total is set to 0 we do not want to limit the number of rows
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if ($total == 0)
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{
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$total = -1;
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}
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$row_offset = ($total) ? $offset : '';
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$num_rows = ($total) ? $total : $offset;
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$query = 'SELECT TOP ' . ($row_offset + $num_rows) . ' ' . substr($query, 6);
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return $this->sql_query($query, $cache_ttl);
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}
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else
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{
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return false;
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}
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}
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// Other query methods
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//
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// NOTE :: Want to remove _ALL_ reliance on sql_numrows from core code ...
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// don't want this here by a middle Milestone
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function sql_numrows($query_id = false)
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{
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if (!$query_id)
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{
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$query_id = $this->query_result;
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}
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return ($query_id) ? @$this->num_rows($query_id) : false;
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}
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function sql_affectedrows()
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{
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return ($this->affected_rows[$this->db_connect_id]) ? $this->affected_rows[$this->db_connect_id] : false;
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}
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function sql_fetchrow($query_id = false)
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{
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global $cache;
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if (!$query_id)
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{
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$query_id = $this->query_result;
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}
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if (isset($cache->sql_rowset[$query_id]))
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{
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return $cache->sql_fetchrow($query_id);
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}
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return ($this->num_rows[$query_id] && $this->current_row[$query_id] < $this->num_rows[$query_id]) ? $this->result_rowset[$query_id][$this->current_row[$query_id]++] : false;
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}
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function sql_fetchrowset($query_id = false)
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{
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if (!$query_id)
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{
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$query_id = $this->query_result;
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}
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return ($this->num_rows[$query_id]) ? $this->result_rowset[$query_id] : false;
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}
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function sql_fetchfield($field, $rownum = -1, $query_id = false)
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{
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if (!$query_id)
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{
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$query_id = $this->query_result;
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}
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if ($query_id)
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{
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if ($rownum < $this->num_rows[$query_id])
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{
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$getrow = ($rownum == -1) ? $this->current_row[$query_id] - 1 : $rownum;
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return $this->result_rowset[$query_id][$getrow][$this->field_names[$query_id][$field]];
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}
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}
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return false;
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}
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function sql_rowseek($rownum, $query_id = false)
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{
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if (!$query_id)
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{
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$query_id = $this->query_result;
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}
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if (isset($this->current_row[$query_id]))
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{
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$this->current_row[$query_id] = $rownum;
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return true;
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}
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return false;
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}
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function sql_nextid()
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{
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return ($this->next_id[$this->db_connect_id]) ? $this->next_id[$this->db_connect_id] : false;
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}
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function sql_freeresult($query_id = false)
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{
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if (!$query_id)
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{
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$query_id = $this->query_result;
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}
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if (isset($this->open_queries[(int) $query_id]))
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{
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unset($this->open_queries[(int) $query_id]);
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unset($this->num_rows[$query_id]);
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unset($this->current_row[$query_id]);
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unset($this->result_rowset[$query_id]);
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unset($this->field_names[$query_id]);
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unset($this->field_types[$query_id]);
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return @odbc_free_result($query_id);
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}
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return false;
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}
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function sql_escape($msg)
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{
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return str_replace("'", "''", str_replace('\\', '\\\\', $msg));
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}
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function db_sql_error()
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{
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return array(
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'message' => @odbc_errormsg(),
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'code' => @odbc_error()
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);
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}
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function _sql_report($mode, $query = '')
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{
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global $cache, $starttime, $phpbb_root_path;
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static $curtime, $query_hold, $html_hold;
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static $sql_report = '';
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static $cache_num_queries = 0;
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switch ($mode)
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{
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case 'start':
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$query_hold = $query;
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$html_hold = '';
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$curtime = explode(' ', microtime());
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$curtime = $curtime[0] + $curtime[1];
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break;
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case 'fromcache':
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$endtime = explode(' ', microtime());
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$endtime = $endtime[0] + $endtime[1];
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$result = $this->_odbc_execute_query($query);
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$splittime = explode(' ', microtime());
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$splittime = $splittime[0] + $splittime[1];
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$time_cache = $endtime - $curtime;
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$time_db = $splittime - $endtime;
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$color = ($time_db > $time_cache) ? 'green' : 'red';
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$sql_report .= '<hr width="100%"/><br /><table class="bg" width="100%" cellspacing="1" cellpadding="4" border="0"><tr><th>Query results obtained from the cache</th></tr><tr><td class="row1"><textarea style="font-family:\'Courier New\',monospace;width:100%" rows="5">' . preg_replace('/\t(AND|OR)(\W)/', "\$1\$2", htmlspecialchars(preg_replace('/[\s]*[\n\r\t]+[\n\r\s\t]*/', "\n", $query))) . '</textarea></td></tr></table><p align="center">';
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$sql_report .= 'Before: ' . sprintf('%.5f', $curtime - $starttime) . 's | After: ' . sprintf('%.5f', $endtime - $starttime) . 's | Elapsed [cache]: <b style="color: ' . $color . '">' . sprintf('%.5f', ($time_cache)) . 's</b> | Elapsed [db]: <b>' . sprintf('%.5f', $time_db) . 's</b></p>';
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// Pad the start time to not interfere with page timing
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$starttime += $time_db;
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@odbc_free_result($result);
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$cache_num_queries++;
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break;
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}
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}
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}
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} // if ... define
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?>
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