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<?php
# Movable Type (r) Open Source (C) 2001-2008 Six Apart, Ltd.
# This program is distributed under the terms of the
# GNU General Public License, version 2.
#
# $Id: mtdb_postgres.php 1554 2008-03-24 03:27:57Z takayama $
require_once("ezsql".DIRECTORY_SEPARATOR."ezsql_postgres.php");
require_once("mtdb_base.php");
class MTDatabase_postgres extends MTDatabaseBase {
var $vendor = 'postgres';
function unserialize($data) {
$data = pg_unescape_bytea($data);
return parent::unserialize($data);
}
function apply_limit_sql($sql, $limit, $offset = 0) {
$limit = intval($limit);
$offset = intval($offset);
$limitStr = '';
if ($limit == -1) $limit = 0;
if ($limit || $offset) {
if (!$limit) $limit = 'all';
$limitStr = ($offset ? 'offset ' . $offset : '') . ' limit '
. $limit;
}
$sql = preg_replace('/<LIMIT>/', $limitStr, $sql);
return $sql;
}
function limit_by_day_sql($column, $days) {
return '(' . $column . '+\'' . $days . ' days\' >= current_date)';
}
function entries_recently_commented_on_sql($subsql) {
$sql = "
select main.* from (
select distinct on (entry_id)
subs.*, comment_created_on
from ($subsql) as subs
inner join mt_comment on comment_entry_id = entry_id and comment_visible = 1
order by entry_id desc
) as main order by comment_created_on desc";
return $sql;
}
function query_start($query)
{
// For reg expressions
$query = trim($query);
// Query was an insert, delete, update, replace
if ( preg_match("/^(insert|delete|update|replace)\s+/i",$query) )
{
return false;
}
// Flush cached values..
$this->flush();
// Log how the function was called
$this->func_call = "\$db->query_start(\"$query\")";
// Keep track of the last query for debug..
$this->last_query = $query;
// Perform the query via std pg_query function..
if (!$this->result = @pg_query($this->dbh,$query)) {
$this->print_error();
return false;
}
$this->num_queries++;
// =======================================================
// Take note of column info
$i=0;
while ($i < @pg_num_fields($this->result))
{
$this->col_info[$i]->name = pg_field_name($this->result,$i);
$this->col_info[$i]->type = pg_field_type($this->result,$i);
$this->col_info[$i]->size = pg_field_size($this->result,$i);
$i++;
}
$this->last_result = array();
$this->num_rows = 0;
// If debug ALL queries
$this->trace || $this->debug_all ? $this->debug() : null ;
return true;
}
function query_fetch($output=OBJECT) {
if ( $row = @pg_fetch_object($this->result) )
{
$this->num_rows++;
if ( $output == OBJECT )
{
return $row;
}
// If the output is an associative array then return row as such..
elseif ( $output == ARRAY_A )
{
return $this->convert_fieldname(get_object_vars($row));
}
// If the output is an numerical array then return row as such..
elseif ( $output == ARRAY_N )
{
return array_values(get_object_vars($row));
}
}
return null;
}
function query_finish() {
if (isset($this->result)) {
@pg_free_result($this->result);
unset($this->result);
}
}
function apply_extract_date($part, $column) {
return "extract('" .strtolower($part) . "' from $column)";
}
function &fetch_unexpired_session($ids, $ttl = 0) {
$result = parent::fetch_unexpired_session($ids, $ttl);
for ($i = 0; $i < count($result); $i++) {
$result[$i]['session_data'] = pg_unescape_bytea($result[$i]['session_data']);
}
return $result;
}
}
?>
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