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<?php | |
/** | |
* | |
* This file is part of the phpBB Forum Software package. | |
* | |
* @copyright (c) phpBB Limited <https://www.phpbb.com> | |
* @license GNU General Public License, version 2 (GPL-2.0) | |
* | |
* For full copyright and license information, please see | |
* the docs/CREDITS.txt file. | |
* | |
*/ | |
namespace phpbb\db\driver; | |
/** | |
* PostgreSQL Database Abstraction Layer | |
* Minimum Requirement is Version 8.3+ | |
*/ | |
class postgres extends \phpbb\db\driver\driver | |
{ | |
var $multi_insert = true; | |
var $last_query_text = ''; | |
var $connect_error = ''; | |
/** | |
* {@inheritDoc} | |
*/ | |
function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false) | |
{ | |
$connect_string = ''; | |
if ($sqluser) | |
{ | |
$connect_string .= "user=$sqluser "; | |
} | |
if ($sqlpassword) | |
{ | |
$connect_string .= "password='$sqlpassword' "; | |
} | |
if ($sqlserver) | |
{ | |
// $sqlserver can carry a port separated by : for compatibility reasons | |
// If $sqlserver has more than one : it's probably an IPv6 address. | |
// In this case we only allow passing a port via the $port variable. | |
if (substr_count($sqlserver, ':') === 1) | |
{ | |
list($sqlserver, $port) = explode(':', $sqlserver); | |
} | |
if ($sqlserver !== 'localhost') | |
{ | |
$connect_string .= "host=$sqlserver "; | |
} | |
if ($port) | |
{ | |
$connect_string .= "port=$port "; | |
} | |
} | |
$schema = ''; | |
if ($database) | |
{ | |
$this->dbname = $database; | |
if (strpos($database, '.') !== false) | |
{ | |
list($database, $schema) = explode('.', $database); | |
} | |
$connect_string .= "dbname=$database"; | |
} | |
$this->persistency = $persistency; | |
if ($this->persistency) | |
{ | |
if (!function_exists('pg_pconnect')) | |
{ | |
$this->connect_error = 'pg_pconnect function does not exist, is pgsql extension installed?'; | |
return $this->sql_error(''); | |
} | |
$collector = new \phpbb\error_collector; | |
$collector->install(); | |
$this->db_connect_id = (!$new_link) ? @pg_pconnect($connect_string) : @pg_pconnect($connect_string, PGSQL_CONNECT_FORCE_NEW); | |
} | |
else | |
{ | |
if (!function_exists('pg_connect')) | |
{ | |
$this->connect_error = 'pg_connect function does not exist, is pgsql extension installed?'; | |
return $this->sql_error(''); | |
} | |
$collector = new \phpbb\error_collector; | |
$collector->install(); | |
$this->db_connect_id = (!$new_link) ? @pg_connect($connect_string) : @pg_connect($connect_string, PGSQL_CONNECT_FORCE_NEW); | |
} | |
$collector->uninstall(); | |
if ($this->db_connect_id) | |
{ | |
if ($schema !== '') | |
{ | |
@pg_query($this->db_connect_id, 'SET search_path TO ' . $schema); | |
} | |
return $this->db_connect_id; | |
} | |
$this->connect_error = $collector->format_errors(); | |
return $this->sql_error(''); | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
function sql_server_info($raw = false, $use_cache = true) | |
{ | |
global $cache; | |
if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('pgsql_version')) === false) | |
{ | |
$query_id = @pg_query($this->db_connect_id, 'SELECT VERSION() AS version'); | |
if ($query_id) | |
{ | |
$row = pg_fetch_assoc($query_id, null); | |
pg_free_result($query_id); | |
$this->sql_server_version = (!empty($row['version'])) ? trim(substr($row['version'], 10)) : 0; | |
if (!empty($cache) && $use_cache) | |
{ | |
$cache->put('pgsql_version', $this->sql_server_version); | |
} | |
} | |
} | |
return ($raw) ? $this->sql_server_version : 'PostgreSQL ' . $this->sql_server_version; | |
} | |
/** | |
* SQL Transaction | |
* @access private | |
*/ | |
function _sql_transaction($status = 'begin') | |
{ | |
switch ($status) | |
{ | |
case 'begin': | |
return @pg_query($this->db_connect_id, 'BEGIN'); | |
break; | |
case 'commit': | |
return @pg_query($this->db_connect_id, 'COMMIT'); | |
break; | |
case 'rollback': | |
return @pg_query($this->db_connect_id, 'ROLLBACK'); | |
break; | |
} | |
return true; | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
function sql_query($query = '', $cache_ttl = 0) | |
{ | |
if ($query != '') | |
{ | |
global $cache; | |
if ($this->debug_sql_explain) | |
{ | |
$this->sql_report('start', $query); | |
} | |
else if ($this->debug_load_time) | |
{ | |
$this->curtime = microtime(true); | |
} | |
$this->last_query_text = $query; | |
$this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false; | |
$this->sql_add_num_queries($this->query_result); | |
if ($this->query_result === false) | |
{ | |
try | |
{ | |
$this->query_result = @pg_query($this->db_connect_id, $query); | |
} | |
catch (\Error $e) | |
{ | |
// Do nothing as SQL driver will report the error | |
} | |
if ($this->query_result === false) | |
{ | |
$this->sql_error($query); | |
} | |
if ($this->debug_sql_explain) | |
{ | |
$this->sql_report('stop', $query); | |
} | |
else if ($this->debug_load_time) | |
{ | |
$this->sql_time += microtime(true) - $this->curtime; | |
} | |
if (!$this->query_result) | |
{ | |
return false; | |
} | |
$safe_query_id = $this->clean_query_id($this->query_result); | |
if ($cache && $cache_ttl) | |
{ | |
$this->open_queries[$safe_query_id] = $this->query_result; | |
$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl); | |
} | |
else if (strpos($query, 'SELECT') === 0) | |
{ | |
$this->open_queries[$safe_query_id] = $this->query_result; | |
} | |
} | |
else if ($this->debug_sql_explain) | |
{ | |
$this->sql_report('fromcache', $query); | |
} | |
} | |
else | |
{ | |
return false; | |
} | |
return $this->query_result; | |
} | |
/** | |
* Build db-specific query data | |
* @access private | |
*/ | |
function _sql_custom_build($stage, $data) | |
{ | |
return $data; | |
} | |
/** | |
* Build LIMIT query | |
*/ | |
function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0) | |
{ | |
$this->query_result = false; | |
// if $total is set to 0 we do not want to limit the number of rows | |
if ($total == 0) | |
{ | |
$total = 'ALL'; | |
} | |
$query .= "\n LIMIT $total OFFSET $offset"; | |
return $this->sql_query($query, $cache_ttl); | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
function sql_affectedrows() | |
{ | |
return ($this->query_result) ? @pg_affected_rows($this->query_result) : false; | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
function sql_fetchrow($query_id = false) | |
{ | |
global $cache; | |
if ($query_id === false) | |
{ | |
$query_id = $this->query_result; | |
} | |
$safe_query_id = $this->clean_query_id($query_id); | |
if ($cache && $cache->sql_exists($safe_query_id)) | |
{ | |
return $cache->sql_fetchrow($safe_query_id); | |
} | |
return ($query_id) ? pg_fetch_assoc($query_id, null) : false; | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
function sql_rowseek($rownum, &$query_id) | |
{ | |
global $cache; | |
if ($query_id === false) | |
{ | |
$query_id = $this->query_result; | |
} | |
$safe_query_id = $this->clean_query_id($query_id); | |
if ($cache && $cache->sql_exists($safe_query_id)) | |
{ | |
return $cache->sql_rowseek($rownum, $safe_query_id); | |
} | |
return ($query_id) ? @pg_result_seek($query_id, $rownum) : false; | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
function sql_fetchfield($field, $rownum = false, $query_id = false) | |
{ | |
global $cache; | |
if ($query_id === false) | |
{ | |
$query_id = $this->query_result; | |
} | |
if ($query_id) | |
{ | |
if ($rownum !== false) | |
{ | |
$this->sql_rowseek($rownum, $query_id); | |
} | |
$safe_query_id = $this->clean_query_id($query_id); | |
if ($cache && !is_object($query_id) && $cache->sql_exists($safe_query_id)) | |
{ | |
return $cache->sql_fetchfield($safe_query_id, $field); | |
} | |
$row = $this->sql_fetchrow($query_id); | |
return (isset($row[$field])) ? $row[$field] : false; | |
} | |
return false; | |
} | |
/** | |
* {@inheritdoc} | |
*/ | |
public function sql_last_inserted_id() | |
{ | |
$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 currval('" . $tablename[1] . "_seq') AS last_value"; | |
$temp_q_id = @pg_query($this->db_connect_id, $query); | |
if (!$temp_q_id) | |
{ | |
return false; | |
} | |
$temp_result = pg_fetch_assoc($temp_q_id, null); | |
pg_free_result($query_id); | |
return ($temp_result) ? $temp_result['last_value'] : false; | |
} | |
} | |
return false; | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
function sql_freeresult($query_id = false) | |
{ | |
global $cache; | |
if ($query_id === false) | |
{ | |
$query_id = $this->query_result; | |
} | |
$safe_query_id = $this->clean_query_id($query_id); | |
if ($cache && !is_object($query_id) && $cache->sql_exists($safe_query_id)) | |
{ | |
return $cache->sql_freeresult($safe_query_id); | |
} | |
if (isset($this->open_queries[$safe_query_id])) | |
{ | |
unset($this->open_queries[$safe_query_id]); | |
return pg_free_result($query_id); | |
} | |
return false; | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
function sql_escape($msg) | |
{ | |
return @pg_escape_string($msg); | |
} | |
/** | |
* Build LIKE expression | |
* @access private | |
*/ | |
function _sql_like_expression($expression) | |
{ | |
return $expression; | |
} | |
/** | |
* Build NOT LIKE expression | |
* @access private | |
*/ | |
function _sql_not_like_expression($expression) | |
{ | |
return $expression; | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
function cast_expr_to_bigint($expression) | |
{ | |
return 'CAST(' . $expression . ' as DECIMAL(255, 0))'; | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
function cast_expr_to_string($expression) | |
{ | |
return 'CAST(' . $expression . ' as VARCHAR(255))'; | |
} | |
/** | |
* return sql error array | |
* @access private | |
*/ | |
function _sql_error() | |
{ | |
// pg_last_error only works when there is an established connection. | |
// Connection errors have to be tracked by us manually. | |
if ($this->db_connect_id) | |
{ | |
$message = @pg_last_error($this->db_connect_id); | |
} | |
else | |
{ | |
$message = $this->connect_error; | |
} | |
return array( | |
'message' => $message, | |
'code' => '' | |
); | |
} | |
/** | |
* Close sql connection | |
* @access private | |
*/ | |
function _sql_close() | |
{ | |
// Released resources are already closed, return true in this case | |
if (!is_resource($this->db_connect_id)) | |
{ | |
return true; | |
} | |
return @pg_close($this->db_connect_id); | |
} | |
/** | |
* Build db-specific report | |
* @access private | |
*/ | |
function _sql_report($mode, $query = '') | |
{ | |
switch ($mode) | |
{ | |
case 'start': | |
$explain_query = $query; | |
if (preg_match('/UPDATE ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m)) | |
{ | |
$explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2]; | |
} | |
else if (preg_match('/DELETE FROM ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m)) | |
{ | |
$explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2]; | |
} | |
if (preg_match('/^SELECT/', $explain_query)) | |
{ | |
$html_table = false; | |
if ($result = @pg_query($this->db_connect_id, "EXPLAIN $explain_query")) | |
{ | |
while ($row = pg_fetch_assoc($result, null)) | |
{ | |
$html_table = $this->sql_report('add_select_row', $query, $html_table, $row); | |
} | |
pg_free_result($result); | |
} | |
if ($html_table) | |
{ | |
$this->html_hold .= '</table>'; | |
} | |
} | |
break; | |
case 'fromcache': | |
$endtime = explode(' ', microtime()); | |
$endtime = $endtime[0] + $endtime[1]; | |
$result = @pg_query($this->db_connect_id, $query); | |
if ($result) | |
{ | |
while ($void = pg_fetch_assoc($result, null)) | |
{ | |
// Take the time spent on parsing rows into account | |
} | |
pg_free_result($result); | |
} | |
$splittime = explode(' ', microtime()); | |
$splittime = $splittime[0] + $splittime[1]; | |
$this->sql_report('record_fromcache', $query, $endtime, $splittime); | |
break; | |
} | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
function sql_quote($msg) | |
{ | |
return '"' . $msg . '"'; | |
} | |
} |