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<?php
require_once('include/dba/dba_driver.php');
class dba_postgres extends dba_driver {
const INSTALL_SCRIPT='install/schema_postgres.sql';
const NULL_DATE = '0001-01-01 00:00:00';
const UTC_NOW = "now() at time zone 'UTC'";
function connect($server,$port,$user,$pass,$db) {
if(!$port) $port = 5432;
$connstr = 'host=' . $server . ' port='.$port . ' user=' . $user . ' password=' . $pass . ' dbname='. $db;
$this->db = pg_connect($connstr);
if($this->db !== false) {
$this->connected = true;
} else {
$this->connected = false;
}
$this->q("SET standard_conforming_strings = 'off'; SET backslash_quote = 'on';"); // emulate mysql string escaping to prevent massive code-clobber
return $this->connected;
}
function q($sql) {
if((! $this->db) || (! $this->connected))
return false;
if(!strpos($sql, ';'))
$sql .= ';';
if(strpos($sql, '`')) // this is a hack. quoted identifiers should be replaced everywhere in the code with dbesc_identifier(), remove this once it is
$sql = str_replace('`', '"', $sql);
$this->error = '';
$result = @pg_query($this->db, $sql);
if(file_exists('db-allqueries.out')) {
$bt = debug_backtrace();
$trace = array();
foreach($bt as $frame) {
if(!empty($frame['file']) && @strstr($frame['file'], $_SERVER['DOCUMENT_ROOT']))
$frame['file'] = substr($frame['file'], strlen($_SERVER['DOCUMENT_ROOT'])+1);
$trace[] = $frame['file'] . ':' . $frame['function'] . '():' . $frame['line'] ;
}
$compact = join(', ', $trace);
file_put_contents('db-allqueries.out', datetime_convert() . ": " . $sql . ' is_resource: '.var_export(is_resource($result), true).', backtrace: '.$compact."\n\n", FILE_APPEND);
}
if($result === false)
$this->error = pg_last_error($this->db);
if($result === false || $this->error) {
//logger('dba_postgres: ' . printable($sql) . ' returned false.' . "\n" . $this->error);
if(file_exists('dbfail.out'))
file_put_contents('dbfail.out', datetime_convert() . "\n" . printable($sql) . ' returned false' . "\n" . $this->error . "\n", FILE_APPEND);
}
if(($result === true) || ($result === false))
return $result;
if(pg_result_status($result) == PGSQL_COMMAND_OK)
return true;
$r = array();
if(pg_num_rows($result)) {
while($x = pg_fetch_array($result, null, PGSQL_ASSOC))
$r[] = $x;
pg_free_result($result);
if($this->debug)
logger('dba_postgres: ' . printable(print_r($r,true)));
}
return $r;
}
function escape($str) {
if($this->db && $this->connected) {
$x = @pg_escape_string($this->db, $str);
return $x;
}
}
function escapebin($str) {
return pg_escape_bytea($str);
}
function unescapebin($str) {
return pg_unescape_bytea($str);
}
function close() {
if($this->db)
pg_close($this->db);
$this->connected = false;
}
function quote_interval($txt) {
return "'$txt'";
}
function escape_identifier($str) {
return pg_escape_identifier($this->db, $str);
}
function optimize_table($table) {
// perhaps do some equivalent thing here, vacuum, etc? I think this is the DBA's domain anyway. Applications should not need to muss with this.
// for now do nothing without a compelling reason. function overrides default legacy mysql.
}
function concat($fld, $sep) {
return 'string_agg(' . $fld . ',\'' . $sep . '\')';
}
}
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