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* @version $Id: oracle.php,v 1.50 2007/10/05 14:36:32 acydburn Exp $
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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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if (!defined('IN_PHPBB'))
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include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
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* Oracle Database Abstraction Layer
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class dbal_oracle extends dbal
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var $last_query_text = '';
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function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
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$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 = $database;
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// support for "easy connect naming"
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if ($sqlserver !== '' && $sqlserver !== '/')
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if (substr($sqlserver, -1, 1) == '/')
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$sqlserver == substr($sqlserver, 0, -1);
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$connect = $sqlserver . (($port) ? ':' . $port : '') . '/' . $database;
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$this->db_connect_id = ($new_link) ? @ocinlogon($this->user, $sqlpassword, $connect, 'UTF8') : (($this->persistency) ? @ociplogon($this->user, $sqlpassword, $connect, 'UTF8') : @ocilogon($this->user, $sqlpassword, $connect, 'UTF8'));
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return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');
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* Version information about used database
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function sql_server_info()
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return @ociserverversion($this->db_connect_id);
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function _sql_transaction($status = 'begin')
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return @ocicommit($this->db_connect_id);
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return @ocirollback($this->db_connect_id);
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* Oracle specific code to handle the fact that it does not compare columns properly
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function _rewrite_col_compare($args)
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if (sizeof($args) == 4)
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return '(' . $args[0] . ' OR (' . $args[1] . ' is NULL AND ' . $args[3] . ' is NULL))';
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else if ($args[2] == '<>')
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// really just a fancy way of saying foo <> bar or (foo is NULL XOR bar is NULL) but SQL has no XOR :P
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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)))';
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return $this->_rewrite_where($args[0]);
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* Oracle specific code to handle it's lack of sanity
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function _rewrite_where($where_clause)
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preg_match_all('/\s*(AND|OR)?\s*([\w_.]++)\s*(?:(=|<[=>]?|>=?)\s*((?>\'(?>[^\']++|\'\')*+\'|[\d-.]+))|((NOT )?IN\s*\((?>\'(?>[^\']++|\'\')*+\',? ?|[\d-.]+,? ?)*+\)))/', $where_clause, $result, PREG_SET_ORDER);
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foreach ($result as $val)
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if ($val[4] !== "''")
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$out .= ' ' . $val[1] . ' ' . $val[2];
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else if ($val[3] == '<>')
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$out .= ' is NOT NULL';
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$in_clause = array();
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$sub_exp = substr($val[5], strpos($val[5], '(') + 1, -1);
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preg_match_all('/\'(?>[^\']++|\'\')*+\'|[\d-.]++/', $sub_exp, $sub_vals, PREG_PATTERN_ORDER);
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foreach ($sub_vals[0] as $sub_val)
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// 1) This determines if an empty string was in the IN clausing, making us turn it into a NULL comparison
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// 2) This fixes the 1000 list limit that Oracle has (ORA-01795)
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if ($sub_val !== "''")
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$in_clause[(int) $i++/1000][] = $sub_val;
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if (!$extra && $i < 1000)
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$out .= ' ' . $val[1] . '(';
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// constuct each IN() clause
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foreach ($in_clause as $in_values)
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$in_array[] = $val[2] . ' ' . (isset($val[6]) ? $val[6] : '') . 'IN(' . implode(', ', $in_values) . ')';
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// Join the IN() clauses against a few ORs (IN is just a nicer OR anyway)
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$out .= implode(' OR ', $in_array);
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// handle the empty string case
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$out .= ' OR ' . $val[2] . ' is ' . (isset($val[6]) ? $val[6] : '') . 'NULL';
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unset($in_array, $in_clause);
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* @param string $query Contains the SQL query which shall be executed
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* @param int $cache_ttl Either 0 to avoid caching or the time in seconds which the result shall be kept in cache
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* @return mixed When casted to bool the returned value returns true on success and false on failure
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function sql_query($query = '', $cache_ttl = 0)
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// EXPLAIN only in extra debug mode
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if (defined('DEBUG_EXTRA'))
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$this->sql_report('start', $query);
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$this->last_query_text = $query;
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$this->query_result = ($cache_ttl && method_exists($cache, 'sql_load')) ? $cache->sql_load($query) : false;
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$this->sql_add_num_queries($this->query_result);
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if ($this->query_result === false)
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$in_transaction = false;
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if (!$this->transaction)
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$this->sql_transaction('begin');
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$in_transaction = true;
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// We overcome Oracle's 4000 char limit by binding vars
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if (strlen($query) > 4000)
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if (preg_match('/^(INSERT INTO[^(]++)\\(([^()]+)\\) VALUES[^(]++\\((.*?)\\)$/s', $query, $regs))
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if (strlen($regs[3]) > 4000)
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$cols = explode(', ', $regs[2]);
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preg_match_all('/\'(?:[^\']++|\'\')*+\'|[\d-.]+/', $regs[3], $vals, PREG_PATTERN_ORDER);
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foreach ($inserts as $key => $value)
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if (!empty($value) && $value[0] === "'" && strlen($value) > 4002) // check to see if this thing is greater than the max + 'x2
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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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$query = $regs[1] . '(' . $regs[2] . ') VALUES (' . implode(', ', $inserts) . ')';
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else if (preg_match_all('/^(UPDATE [\\w_]++\\s+SET )([\\w_]++\\s*=\\s*(?:\'(?:[^\']++|\'\')*+\'|[\d-.]+)(?:,\\s*[\\w_]++\\s*=\\s*(?:\'(?:[^\']++|\'\')*+\'|[\d-.]+))*+)\\s+(WHERE.*)$/s', $query, $data, PREG_SET_ORDER))
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if (strlen($data[0][2]) > 4000)
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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], $temp, PREG_SET_ORDER);
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foreach ($temp as $value)
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if (!empty($value[2]) && $value[2][0] === "'" && strlen($value[2]) > 4002) // check to see if this thing is greater than the max + 'x2
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$cols[] = $value[1] . '=:' . strtoupper($value[1]);
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$array[$value[1]] = str_replace("''", "'", substr($value[2], 1, -1));
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$cols[] = $value[1] . '=' . $value[2];
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$query = $update . implode(', ', $cols) . ' ' . $where;
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switch (substr($query, 0, 6))
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if (preg_match('/^(DELETE FROM [\w_]++ WHERE)((?:\s*(?:AND|OR)?\s*[\w_]+\s*(?:(?:=|<>)\s*(?>\'(?>[^\']++|\'\')*+\'|[\d-.]+)|(?:NOT )?IN\s*\((?>\'(?>[^\']++|\'\')*+\',? ?|[\d-.]+,? ?)*+\)))*+)$/', $query, $regs))
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$query = $regs[1] . $this->_rewrite_where($regs[2]);
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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, $regs))
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$query = $regs[1] . $this->_rewrite_where($regs[2]);
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$query = preg_replace_callback('/([\w_.]++)\s*(?:(=|<>)\s*(?>\'(?>[^\']++|\'\')*+\'|[\d-.]++|([\w_.]++))|(?:NOT )?IN\s*\((?>\'(?>[^\']++|\'\')*+\',? ?|[\d-.]++,? ?)*+\))/', array($this, '_rewrite_col_compare'), $query);
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$this->query_result = @ociparse($this->db_connect_id, $query);
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foreach ($array as $key => $value)
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@ocibindbyname($this->query_result, $key, $array[$key], -1);
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$success = @ociexecute($this->query_result, OCI_DEFAULT);
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$this->sql_error($query);
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$this->query_result = false;
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if (!$in_transaction)
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$this->sql_transaction('commit');
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if (defined('DEBUG_EXTRA'))
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$this->sql_report('stop', $query);
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if ($cache_ttl && method_exists($cache, 'sql_save'))
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$this->open_queries[(int) $this->query_result] = $this->query_result;
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$cache->sql_save($query, $this->query_result, $cache_ttl);
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else if (strpos($query, 'SELECT') === 0 && $this->query_result)
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$this->open_queries[(int) $this->query_result] = $this->query_result;
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else if (defined('DEBUG_EXTRA'))
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$this->sql_report('fromcache', $query);
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return ($this->query_result) ? $this->query_result : false;
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function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
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$this->query_result = false;
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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, $cache_ttl);
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* Return number of affected rows
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function sql_affectedrows()
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return ($this->query_result) ? @ocirowcount($this->query_result) : false;
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function sql_fetchrow($query_id = false)
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if ($query_id === false)
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$query_id = $this->query_result;
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if (isset($cache->sql_rowset[$query_id]))
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return $cache->sql_fetchrow($query_id);
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if ($query_id !== false)
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$result = @ocifetchinto($query_id, $row, OCI_ASSOC + OCI_RETURN_NULLS);
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if (!$result || !$row)
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$result_row = array();
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foreach ($row as $key => $value)
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// Oracle treats empty strings as null
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if (is_object($value))
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$value = $value->load();
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$result_row[strtolower($key)] = $value;
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* Seek to given row number
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* rownum is zero-based
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function sql_rowseek($rownum, &$query_id)
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if ($query_id === false)
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$query_id = $this->query_result;
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if (isset($cache->sql_rowset[$query_id]))
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return $cache->sql_rowseek($rownum, $query_id);
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if ($query_id === false)
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// Reset internal pointer
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@ociexecute($query_id, OCI_DEFAULT);
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// We do not fetch the row for rownum == 0 because then the next resultset would be the second row
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for ($i = 0; $i < $rownum; $i++)
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if (!$this->sql_fetchrow($query_id))
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* Get last inserted id after insert statement
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function sql_nextid()
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$query_id = $this->query_result;
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if ($query_id !== false && $this->last_query_text != '')
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if (preg_match('#^INSERT[\t\n ]+INTO[\t\n ]+([a-z0-9\_\-]+)#is', $this->last_query_text, $tablename))
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$query = 'SELECT ' . $tablename[1] . '_seq.currval FROM DUAL';
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$stmt = @ociparse($this->db_connect_id, $query);
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@ociexecute($stmt, OCI_DEFAULT);
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$temp_result = @ocifetchinto($stmt, $temp_array, OCI_ASSOC + OCI_RETURN_NULLS);
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@ocifreestatement($stmt);
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return $temp_array['CURRVAL'];
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function sql_freeresult($query_id = false)
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if ($query_id === false)
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$query_id = $this->query_result;
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if (isset($cache->sql_rowset[$query_id]))
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return $cache->sql_freeresult($query_id);
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if (isset($this->open_queries[(int) $query_id]))
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unset($this->open_queries[(int) $query_id]);
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return @ocifreestatement($query_id);
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* Escape string used in sql query
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function sql_escape($msg)
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return str_replace("'", "''", $msg);
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* Build LIKE expression
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function _sql_like_expression($expression)
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return $expression . " ESCAPE '\\'";
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function _sql_custom_build($stage, $data)
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* return sql error array
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function _sql_error()
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$error = @ocierror();
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$error = (!$error) ? @ocierror($this->query_result) : $error;
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$error = (!$error) ? @ocierror($this->db_connect_id) : $error;
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$this->last_error_result = $error;
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$error = (isset($this->last_error_result) && $this->last_error_result) ? $this->last_error_result : array();
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* Close sql connection
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function _sql_close()
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return @ocilogoff($this->db_connect_id);
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* Build db-specific report
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function _sql_report($mode, $query = '')
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// Grab a plan table, any will do
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$sql = "SELECT table_name
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WHERE table_name LIKE '%PLAN_TABLE%'";
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$stmt = ociparse($this->db_connect_id, $sql);
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if (ocifetchinto($stmt, $result, OCI_ASSOC + OCI_RETURN_NULLS))
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$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 = ociparse($this->db_connect_id, "DELETE FROM $table WHERE statement_id='$statement_id'");
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ocifreestatement($stmt2);
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SET STATEMENT_ID = '$statement_id'
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$stmt2 = ociparse($this->db_connect_id, $sql);
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ocifreestatement($stmt2);
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// Get the data from the plan
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$sql = "SELECT operation, options, object_name, object_type, cardinality, cost
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START WITH id = 0 AND statement_id = '$statement_id'
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CONNECT BY PRIOR id = parent_id
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AND statement_id = '$statement_id'";
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$stmt2 = ociparse($this->db_connect_id, $sql);
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while (ocifetchinto($stmt2, $row, OCI_ASSOC + OCI_RETURN_NULLS))
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$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
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ocifreestatement($stmt2);
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// Remove the plan we just made, we delete them on request anyway
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$stmt2 = ociparse($this->db_connect_id, "DELETE FROM $table WHERE statement_id='$statement_id'");
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ocifreestatement($stmt2);
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ocifreestatement($stmt);
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$this->html_hold .= '</table>';
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$endtime = explode(' ', microtime());
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$endtime = $endtime[0] + $endtime[1];
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$result = @ociparse($this->db_connect_id, $query);
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$success = @ociexecute($result, OCI_DEFAULT);
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while (@ocifetchinto($result, $row, OCI_ASSOC + OCI_RETURN_NULLS))
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// Take the time spent on parsing rows into account
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@ocifreestatement($result);
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$splittime = explode(' ', microtime());
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$splittime = $splittime[0] + $splittime[1];
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$this->sql_report('record_fromcache', $query, $endtime, $splittime);
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www/php/phpBB3/includes/db/oracle.php
