[6] | 1 | <?php |
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| 2 | |
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| 3 | /** |
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| 4 | * Copyright (C) 2008-2011 FluxBB |
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| 5 | * based on code by Rickard Andersson copyright (C) 2002-2008 PunBB |
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| 6 | * License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher |
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| 7 | */ |
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| 8 | |
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| 9 | // Make sure we have built in support for PostgreSQL |
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| 10 | if (!function_exists('pg_connect')) |
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| 11 | exit('This PHP environment doesn\'t have PostgreSQL support built in. PostgreSQL support is required if you want to use a PostgreSQL database to run this forum. Consult the PHP documentation for further assistance.'); |
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| 12 | |
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| 13 | |
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| 14 | class DBLayer |
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| 15 | { |
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| 16 | var $prefix; |
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| 17 | var $link_id; |
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| 18 | var $query_result; |
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| 19 | var $last_query_text = array(); |
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| 20 | var $in_transaction = 0; |
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| 21 | |
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| 22 | var $saved_queries = array(); |
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| 23 | var $num_queries = 0; |
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| 24 | |
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| 25 | var $error_no = false; |
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| 26 | var $error_msg = 'Unknown'; |
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| 27 | |
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| 28 | var $datatype_transformations = array( |
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| 29 | '%^(TINY|SMALL)INT( )?(\\([0-9]+\\))?( )?(UNSIGNED)?$%i' => 'SMALLINT', |
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| 30 | '%^(MEDIUM)?INT( )?(\\([0-9]+\\))?( )?(UNSIGNED)?$%i' => 'INTEGER', |
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| 31 | '%^BIGINT( )?(\\([0-9]+\\))?( )?(UNSIGNED)?$%i' => 'BIGINT', |
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| 32 | '%^(TINY|MEDIUM|LONG)?TEXT$%i' => 'TEXT', |
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| 33 | '%^DOUBLE( )?(\\([0-9,]+\\))?( )?(UNSIGNED)?$%i' => 'DOUBLE PRECISION', |
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| 34 | '%^FLOAT( )?(\\([0-9]+\\))?( )?(UNSIGNED)?$%i' => 'REAL' |
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| 35 | ); |
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| 36 | |
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| 37 | |
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| 38 | function DBLayer($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect) |
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| 39 | { |
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| 40 | $this->prefix = $db_prefix; |
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| 41 | |
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| 42 | if ($db_host) |
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| 43 | { |
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| 44 | if (strpos($db_host, ':') !== false) |
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| 45 | { |
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| 46 | list($db_host, $dbport) = explode(':', $db_host); |
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| 47 | $connect_str[] = 'host='.$db_host.' port='.$dbport; |
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| 48 | } |
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| 49 | else |
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| 50 | $connect_str[] = 'host='.$db_host; |
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| 51 | } |
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| 52 | |
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| 53 | if ($db_name) |
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| 54 | $connect_str[] = 'dbname='.$db_name; |
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| 55 | |
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| 56 | if ($db_username) |
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| 57 | $connect_str[] = 'user='.$db_username; |
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| 58 | |
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| 59 | if ($db_password) |
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| 60 | $connect_str[] = 'password='.$db_password; |
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| 61 | |
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| 62 | if ($p_connect) |
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| 63 | $this->link_id = @pg_pconnect(implode(' ', $connect_str)); |
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| 64 | else |
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| 65 | $this->link_id = @pg_connect(implode(' ', $connect_str)); |
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| 66 | |
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| 67 | if (!$this->link_id) |
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| 68 | error('Unable to connect to PostgreSQL server', __FILE__, __LINE__); |
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| 69 | |
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| 70 | // Setup the client-server character set (UTF-8) |
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| 71 | if (!defined('FORUM_NO_SET_NAMES')) |
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| 72 | $this->set_names('utf8'); |
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| 73 | |
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| 74 | return $this->link_id; |
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| 75 | } |
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| 76 | |
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| 77 | |
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| 78 | function start_transaction() |
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| 79 | { |
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| 80 | ++$this->in_transaction; |
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| 81 | |
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| 82 | return (@pg_query($this->link_id, 'BEGIN')) ? true : false; |
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| 83 | } |
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| 84 | |
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| 85 | |
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| 86 | function end_transaction() |
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| 87 | { |
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| 88 | --$this->in_transaction; |
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| 89 | |
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| 90 | if (@pg_query($this->link_id, 'COMMIT')) |
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| 91 | return true; |
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| 92 | else |
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| 93 | { |
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| 94 | @pg_query($this->link_id, 'ROLLBACK'); |
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| 95 | return false; |
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| 96 | } |
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| 97 | } |
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| 98 | |
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| 99 | |
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| 100 | function query($sql, $unbuffered = false) // $unbuffered is ignored since there is no pgsql_unbuffered_query() |
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| 101 | { |
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| 102 | if (strrpos($sql, 'LIMIT') !== false) |
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| 103 | $sql = preg_replace('%LIMIT ([0-9]+),([ 0-9]+)%', 'LIMIT \\2 OFFSET \\1', $sql); |
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| 104 | |
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| 105 | if (defined('PUN_SHOW_QUERIES')) |
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| 106 | $q_start = get_microtime(); |
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| 107 | |
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| 108 | @pg_send_query($this->link_id, $sql); |
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| 109 | $this->query_result = @pg_get_result($this->link_id); |
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| 110 | |
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| 111 | if (pg_result_status($this->query_result) != PGSQL_FATAL_ERROR) |
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| 112 | { |
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| 113 | if (defined('PUN_SHOW_QUERIES')) |
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| 114 | $this->saved_queries[] = array($sql, sprintf('%.5f', get_microtime() - $q_start)); |
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| 115 | |
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| 116 | ++$this->num_queries; |
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| 117 | |
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| 118 | $this->last_query_text[$this->query_result] = $sql; |
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| 119 | |
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| 120 | return $this->query_result; |
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| 121 | } |
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| 122 | else |
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| 123 | { |
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| 124 | if (defined('PUN_SHOW_QUERIES')) |
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| 125 | $this->saved_queries[] = array($sql, 0); |
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| 126 | |
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| 127 | $this->error_no = false; |
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| 128 | $this->error_msg = @pg_result_error($this->query_result); |
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| 129 | |
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| 130 | if ($this->in_transaction) |
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| 131 | @pg_query($this->link_id, 'ROLLBACK'); |
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| 132 | |
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| 133 | --$this->in_transaction; |
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| 134 | |
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| 135 | return false; |
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| 136 | } |
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| 137 | } |
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| 138 | |
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| 139 | |
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| 140 | function result($query_id = 0, $row = 0, $col = 0) |
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| 141 | { |
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| 142 | return ($query_id) ? @pg_fetch_result($query_id, $row, $col) : false; |
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| 143 | } |
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| 144 | |
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| 145 | |
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| 146 | function fetch_assoc($query_id = 0) |
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| 147 | { |
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| 148 | return ($query_id) ? @pg_fetch_assoc($query_id) : false; |
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| 149 | } |
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| 150 | |
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| 151 | |
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| 152 | function fetch_row($query_id = 0) |
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| 153 | { |
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| 154 | return ($query_id) ? @pg_fetch_row($query_id) : false; |
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| 155 | } |
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| 156 | |
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| 157 | |
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| 158 | function num_rows($query_id = 0) |
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| 159 | { |
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| 160 | return ($query_id) ? @pg_num_rows($query_id) : false; |
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| 161 | } |
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| 162 | |
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| 163 | |
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| 164 | function affected_rows() |
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| 165 | { |
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| 166 | return ($this->query_result) ? @pg_affected_rows($this->query_result) : false; |
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| 167 | } |
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| 168 | |
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| 169 | |
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| 170 | function insert_id() |
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| 171 | { |
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| 172 | $query_id = $this->query_result; |
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| 173 | |
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| 174 | if ($query_id && $this->last_query_text[$query_id] != '') |
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| 175 | { |
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| 176 | if (preg_match('%^INSERT INTO ([a-z0-9\_\-]+)%is', $this->last_query_text[$query_id], $table_name)) |
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| 177 | { |
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| 178 | // Hack (don't ask) |
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| 179 | if (substr($table_name[1], -6) == 'groups') |
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| 180 | $table_name[1] .= '_g'; |
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| 181 | |
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| 182 | $temp_q_id = @pg_query($this->link_id, 'SELECT currval(\''.$table_name[1].'_id_seq\')'); |
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| 183 | return ($temp_q_id) ? intval(@pg_fetch_result($temp_q_id, 0)) : false; |
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| 184 | } |
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| 185 | } |
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| 186 | |
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| 187 | return false; |
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| 188 | } |
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| 189 | |
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| 190 | |
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| 191 | function get_num_queries() |
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| 192 | { |
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| 193 | return $this->num_queries; |
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| 194 | } |
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| 195 | |
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| 196 | |
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| 197 | function get_saved_queries() |
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| 198 | { |
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| 199 | return $this->saved_queries; |
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| 200 | } |
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| 201 | |
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| 202 | |
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| 203 | function free_result($query_id = false) |
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| 204 | { |
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| 205 | if (!$query_id) |
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| 206 | $query_id = $this->query_result; |
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| 207 | |
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| 208 | return ($query_id) ? @pg_free_result($query_id) : false; |
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| 209 | } |
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| 210 | |
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| 211 | |
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| 212 | function escape($str) |
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| 213 | { |
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| 214 | return is_array($str) ? '' : pg_escape_string($str); |
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| 215 | } |
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| 216 | |
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| 217 | |
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| 218 | function error() |
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| 219 | { |
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| 220 | $result['error_sql'] = @current(@end($this->saved_queries)); |
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| 221 | $result['error_no'] = $this->error_no; |
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| 222 | $result['error_msg'] = $this->error_msg; |
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| 223 | |
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| 224 | return $result; |
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| 225 | } |
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| 226 | |
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| 227 | |
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| 228 | function close() |
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| 229 | { |
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| 230 | if ($this->link_id) |
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| 231 | { |
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| 232 | if ($this->in_transaction) |
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| 233 | { |
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| 234 | if (defined('PUN_SHOW_QUERIES')) |
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| 235 | $this->saved_queries[] = array('COMMIT', 0); |
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| 236 | |
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| 237 | @pg_query($this->link_id, 'COMMIT'); |
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| 238 | } |
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| 239 | |
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| 240 | if ($this->query_result) |
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| 241 | @pg_free_result($this->query_result); |
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| 242 | |
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| 243 | return @pg_close($this->link_id); |
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| 244 | } |
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| 245 | else |
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| 246 | return false; |
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| 247 | } |
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| 248 | |
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| 249 | |
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| 250 | function get_names() |
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| 251 | { |
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| 252 | $result = $this->query('SHOW client_encoding'); |
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| 253 | return strtolower($this->result($result)); // MySQL returns lowercase so lets be consistent |
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| 254 | } |
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| 255 | |
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| 256 | |
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| 257 | function set_names($names) |
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| 258 | { |
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| 259 | return $this->query('SET NAMES \''.$this->escape($names).'\''); |
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| 260 | } |
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| 261 | |
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| 262 | |
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| 263 | function get_version() |
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| 264 | { |
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| 265 | $result = $this->query('SELECT VERSION()'); |
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| 266 | |
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| 267 | return array( |
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| 268 | 'name' => 'PostgreSQL', |
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| 269 | 'version' => preg_replace('%^[^0-9]+([^\s,-]+).*$%', '\\1', $this->result($result)) |
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| 270 | ); |
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| 271 | } |
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| 272 | |
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| 273 | |
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| 274 | function table_exists($table_name, $no_prefix = false) |
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| 275 | { |
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| 276 | $result = $this->query('SELECT 1 FROM pg_class WHERE relname = \''.($no_prefix ? '' : $this->prefix).$this->escape($table_name).'\''); |
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| 277 | return $this->num_rows($result) > 0; |
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| 278 | } |
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| 279 | |
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| 280 | |
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| 281 | function field_exists($table_name, $field_name, $no_prefix = false) |
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| 282 | { |
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| 283 | $result = $this->query('SELECT 1 FROM pg_class c INNER JOIN pg_attribute a ON a.attrelid = c.oid WHERE c.relname = \''.($no_prefix ? '' : $this->prefix).$this->escape($table_name).'\' AND a.attname = \''.$this->escape($field_name).'\''); |
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| 284 | return $this->num_rows($result) > 0; |
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| 285 | } |
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| 286 | |
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| 287 | |
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| 288 | function index_exists($table_name, $index_name, $no_prefix = false) |
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| 289 | { |
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| 290 | $result = $this->query('SELECT 1 FROM pg_index i INNER JOIN pg_class c1 ON c1.oid = i.indrelid INNER JOIN pg_class c2 ON c2.oid = i.indexrelid WHERE c1.relname = \''.($no_prefix ? '' : $this->prefix).$this->escape($table_name).'\' AND c2.relname = \''.($no_prefix ? '' : $this->prefix).$this->escape($table_name).'_'.$this->escape($index_name).'\''); |
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| 291 | return $this->num_rows($result) > 0; |
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| 292 | } |
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| 293 | |
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| 294 | |
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| 295 | function create_table($table_name, $schema, $no_prefix = false) |
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| 296 | { |
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| 297 | if ($this->table_exists($table_name, $no_prefix)) |
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| 298 | return true; |
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| 299 | |
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| 300 | $query = 'CREATE TABLE '.($no_prefix ? '' : $this->prefix).$table_name." (\n"; |
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| 301 | |
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| 302 | // Go through every schema element and add it to the query |
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| 303 | foreach ($schema['FIELDS'] as $field_name => $field_data) |
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| 304 | { |
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| 305 | $field_data['datatype'] = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_data['datatype']); |
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| 306 | |
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| 307 | $query .= $field_name.' '.$field_data['datatype']; |
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| 308 | |
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| 309 | // The SERIAL datatype is a special case where we don't need to say not null |
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| 310 | if (!$field_data['allow_null'] && $field_data['datatype'] != 'SERIAL') |
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| 311 | $query .= ' NOT NULL'; |
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| 312 | |
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| 313 | if (isset($field_data['default'])) |
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| 314 | $query .= ' DEFAULT '.$field_data['default']; |
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| 315 | |
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| 316 | $query .= ",\n"; |
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| 317 | } |
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| 318 | |
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| 319 | // If we have a primary key, add it |
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| 320 | if (isset($schema['PRIMARY KEY'])) |
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| 321 | $query .= 'PRIMARY KEY ('.implode(',', $schema['PRIMARY KEY']).'),'."\n"; |
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| 322 | |
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| 323 | // Add unique keys |
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| 324 | if (isset($schema['UNIQUE KEYS'])) |
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| 325 | { |
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| 326 | foreach ($schema['UNIQUE KEYS'] as $key_name => $key_fields) |
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| 327 | $query .= 'UNIQUE ('.implode(',', $key_fields).'),'."\n"; |
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| 328 | } |
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| 329 | |
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| 330 | // We remove the last two characters (a newline and a comma) and add on the ending |
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| 331 | $query = substr($query, 0, strlen($query) - 2)."\n".')'; |
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| 332 | |
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| 333 | $result = $this->query($query) ? true : false; |
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| 334 | |
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| 335 | // Add indexes |
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| 336 | if (isset($schema['INDEXES'])) |
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| 337 | { |
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| 338 | foreach ($schema['INDEXES'] as $index_name => $index_fields) |
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| 339 | $result &= $this->add_index($table_name, $index_name, $index_fields, false, $no_prefix); |
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| 340 | } |
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| 341 | |
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| 342 | return $result; |
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| 343 | } |
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| 344 | |
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| 345 | |
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| 346 | function drop_table($table_name, $no_prefix = false) |
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| 347 | { |
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| 348 | if (!$this->table_exists($table_name, $no_prefix)) |
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| 349 | return true; |
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| 350 | |
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| 351 | return $this->query('DROP TABLE '.($no_prefix ? '' : $this->prefix).$table_name) ? true : false; |
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| 352 | } |
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| 353 | |
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| 354 | |
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| 355 | function rename_table($old_table, $new_table, $no_prefix = false) |
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| 356 | { |
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| 357 | // If there new table exists and the old one doesn't, then we're happy |
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| 358 | if ($this->table_exists($new_table, $no_prefix) && !$this->table_exists($old_table, $no_prefix)) |
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| 359 | return true; |
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| 360 | |
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| 361 | return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$old_table.' RENAME TO '.($no_prefix ? '' : $this->prefix).$new_table) ? true : false; |
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| 362 | } |
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| 363 | |
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| 364 | |
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| 365 | function add_field($table_name, $field_name, $field_type, $allow_null, $default_value = null, $after_field = null, $no_prefix = false) |
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| 366 | { |
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| 367 | if ($this->field_exists($table_name, $field_name, $no_prefix)) |
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| 368 | return true; |
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| 369 | |
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| 370 | $field_type = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_type); |
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| 371 | |
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| 372 | $result = $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' ADD '.$field_name.' '.$field_type) ? true : false; |
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| 373 | |
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| 374 | if ($default_value !== null) |
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| 375 | { |
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| 376 | if (!is_int($default_value) && !is_float($default_value)) |
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| 377 | $default_value = '\''.$this->escape($default_value).'\''; |
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| 378 | |
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| 379 | $result &= $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' ALTER '.$field_name.' SET DEFAULT '.$default_value) ? true : false; |
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| 380 | $result &= $this->query('UPDATE '.($no_prefix ? '' : $this->prefix).$table_name.' SET '.$field_name.'='.$default_value) ? true : false; |
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| 381 | } |
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| 382 | |
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| 383 | if (!$allow_null) |
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| 384 | $result &= $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' ALTER '.$field_name.' SET NOT NULL') ? true : false; |
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| 385 | |
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| 386 | return $result; |
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| 387 | } |
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| 388 | |
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| 389 | |
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| 390 | function alter_field($table_name, $field_name, $field_type, $allow_null, $default_value = null, $after_field = null, $no_prefix = false) |
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| 391 | { |
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| 392 | if (!$this->field_exists($table_name, $field_name, $no_prefix)) |
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| 393 | return true; |
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| 394 | |
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| 395 | $field_type = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_type); |
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| 396 | |
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| 397 | $result = $this->add_field($table_name, 'tmp_'.$field_name, $field_type, $allow_null, $default_value, $after_field, $no_prefix); |
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| 398 | $result &= $this->query('UPDATE '.($no_prefix ? '' : $this->prefix).$table_name.' SET tmp_'.$field_name.' = '.$field_name) ? true : false; |
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| 399 | $result &= $this->drop_field($table_name, $field_name, $no_prefix); |
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| 400 | $result &= $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' RENAME COLUMN tmp_'.$field_name.' TO '.$field_name) ? true : false; |
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| 401 | |
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| 402 | return $result; |
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| 403 | } |
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| 404 | |
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| 405 | |
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| 406 | function drop_field($table_name, $field_name, $no_prefix = false) |
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| 407 | { |
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| 408 | if (!$this->field_exists($table_name, $field_name, $no_prefix)) |
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| 409 | return true; |
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| 410 | |
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| 411 | return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' DROP '.$field_name) ? true : false; |
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| 412 | } |
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| 413 | |
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| 414 | |
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| 415 | function add_index($table_name, $index_name, $index_fields, $unique = false, $no_prefix = false) |
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| 416 | { |
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| 417 | if ($this->index_exists($table_name, $index_name, $no_prefix)) |
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| 418 | return true; |
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| 419 | |
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| 420 | return $this->query('CREATE '.($unique ? 'UNIQUE ' : '').'INDEX '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name.' ON '.($no_prefix ? '' : $this->prefix).$table_name.'('.implode(',', $index_fields).')') ? true : false; |
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| 421 | } |
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| 422 | |
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| 423 | |
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| 424 | function drop_index($table_name, $index_name, $no_prefix = false) |
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| 425 | { |
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| 426 | if (!$this->index_exists($table_name, $index_name, $no_prefix)) |
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| 427 | return true; |
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| 428 | |
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| 429 | return $this->query('DROP INDEX '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name) ? true : false; |
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| 430 | } |
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| 431 | |
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| 432 | function truncate_table($table_name, $no_prefix = false) |
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| 433 | { |
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| 434 | return $this->query('DELETE FROM '.($no_prefix ? '' : $this->prefix).$table_name) ? true : false; |
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| 435 | } |
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| 436 | } |
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