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-rw-r--r--include/dblayer/functions_mysql.inc.php463
1 files changed, 463 insertions, 0 deletions
diff --git a/include/dblayer/functions_mysql.inc.php b/include/dblayer/functions_mysql.inc.php
new file mode 100644
index 000000000..23d232675
--- /dev/null
+++ b/include/dblayer/functions_mysql.inc.php
@@ -0,0 +1,463 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | Piwigo - a PHP based picture gallery |
+// +-----------------------------------------------------------------------+
+// | Copyright(C) 2008-2009 Piwigo Team http://piwigo.org |
+// | Copyright(C) 2003-2008 PhpWebGallery Team http://phpwebgallery.net |
+// | Copyright(C) 2002-2003 Pierrick LE GALL http://le-gall.net/pierrick |
+// +-----------------------------------------------------------------------+
+// | This program is free software; you can redistribute it and/or modify |
+// | it under the terms of the GNU General Public License as published by |
+// | the Free Software Foundation |
+// | |
+// | This program is distributed in the hope that it will be useful, but |
+// | WITHOUT ANY WARRANTY; without even the implied warranty of |
+// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
+// | General Public License for more details. |
+// | |
+// | You should have received a copy of the GNU General Public License |
+// | along with this program; if not, write to the Free Software |
+// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
+// | USA. |
+// +-----------------------------------------------------------------------+
+
+/**
+ *
+ * simple functions
+ *
+ */
+
+function pwg_db_connect($host, $user, $password, $database)
+{
+ $link = mysql_connect($host, $user, $password) or my_error('mysql_connect', true);
+ mysql_select_db($database, $link) or my_error('mysql_select_db', true);
+
+ return $link;
+}
+
+function pwg_db_check_charset()
+{
+ defined('PWG_CHARSET') and defined('DB_CHARSET')
+ or fatal_error('PWG_CHARSET and/or DB_CHARSET is not defined');
+ if ( version_compare(mysql_get_server_info(), '4.1.0', '>=') )
+ {
+ if (DB_CHARSET!='')
+ {
+ pwg_query('SET NAMES "'.DB_CHARSET.'"');
+ }
+ }
+ elseif ( strtolower(PWG_CHARSET)!='iso-8859-1' )
+ {
+ fatal_error('PWG supports only iso-8859-1 charset on MySql version '.mysql_get_server_info());
+ }
+}
+
+function pwg_get_db_version()
+{
+ list($mysql_version) = pwg_db_fetch_row(pwg_query('SELECT VERSION();'));
+
+ return $mysql_version;
+}
+
+function pwg_query($query)
+{
+ global $conf,$page,$debug,$t2;
+
+ $start = get_moment();
+ ($result = mysql_query($query)) or my_error($query, $conf['die_on_sql_error']);
+
+ $time = get_moment() - $start;
+
+ if (!isset($page['count_queries']))
+ {
+ $page['count_queries'] = 0;
+ $page['queries_time'] = 0;
+ }
+
+ $page['count_queries']++;
+ $page['queries_time']+= $time;
+
+ if ($conf['show_queries'])
+ {
+ $output = '';
+ $output.= '<pre>['.$page['count_queries'].'] ';
+ $output.= "\n".$query;
+ $output.= "\n".'(this query time : ';
+ $output.= '<b>'.number_format($time, 3, '.', ' ').' s)</b>';
+ $output.= "\n".'(total SQL time : ';
+ $output.= number_format($page['queries_time'], 3, '.', ' ').' s)';
+ $output.= "\n".'(total time : ';
+ $output.= number_format( ($time+$start-$t2), 3, '.', ' ').' s)';
+ if ( $result!=null and preg_match('/\s*SELECT\s+/i',$query) )
+ {
+ $output.= "\n".'(num rows : ';
+ $output.= mysql_num_rows($result).' )';
+ }
+ elseif ( $result!=null
+ and preg_match('/\s*INSERT|UPDATE|REPLACE|DELETE\s+/i',$query) )
+ {
+ $output.= "\n".'(affected rows : ';
+ $output.= mysql_affected_rows().' )';
+ }
+ $output.= "</pre>\n";
+
+ $debug .= $output;
+ }
+
+ return $result;
+}
+
+function pwg_db_changes($result)
+{
+ return mysql_affected_rows($result);
+}
+
+function pwg_db_num_rows($result)
+{
+ return mysql_num_rows($result);
+}
+
+function pwg_db_fetch_assoc($result)
+{
+ return mysql_fetch_assoc($result);
+}
+
+function pwg_db_fetch_row($result)
+{
+ return mysql_fetch_row($result);
+}
+
+function pwg_db_fetch_object($result)
+{
+ return mysql_fetch_object($result);
+}
+
+function pwg_free_result($result)
+{
+ return mysql_free_result($result);
+}
+
+function pwg_db_real_escape_string($s)
+{
+ return mysql_real_escape_string($s);
+}
+
+function pwg_db_insert_id()
+{
+ return mysql_insert_id();
+}
+
+/**
+ *
+ * complex functions
+ *
+ */
+
+/**
+ * creates an array based on a query, this function is a very common pattern
+ * used here
+ *
+ * @param string $query
+ * @param string $fieldname
+ * @return array
+ */
+function array_from_query($query, $fieldname)
+{
+ $array = array();
+
+ $result = pwg_query($query);
+ while ($row = mysql_fetch_assoc($result))
+ {
+ array_push($array, $row[$fieldname]);
+ }
+
+ return $array;
+}
+
+define('MASS_UPDATES_SKIP_EMPTY', 1);
+/**
+ * updates multiple lines in a table
+ *
+ * @param string table_name
+ * @param array dbfields
+ * @param array datas
+ * @param int flags - if MASS_UPDATES_SKIP_EMPTY - empty values do not overwrite existing ones
+ * @return void
+ */
+function mass_updates($tablename, $dbfields, $datas, $flags=0)
+{
+ if (count($datas) == 0)
+ return;
+ // depending on the MySQL version, we use the multi table update or N update queries
+ if (count($datas) < 10 or version_compare(mysql_get_server_info(), '4.0.4') < 0)
+ { // MySQL is prior to version 4.0.4, multi table update feature is not available
+ foreach ($datas as $data)
+ {
+ $query = '
+UPDATE '.$tablename.'
+ SET ';
+ $is_first = true;
+ foreach ($dbfields['update'] as $key)
+ {
+ $separator = $is_first ? '' : ",\n ";
+
+ if (isset($data[$key]) and $data[$key] != '')
+ {
+ $query.= $separator.$key.' = \''.$data[$key].'\'';
+ }
+ else
+ {
+ if ($flags & MASS_UPDATES_SKIP_EMPTY )
+ continue; // next field
+ $query.= "$separator$key = NULL";
+ }
+ $is_first = false;
+ }
+ if (!$is_first)
+ {// only if one field at least updated
+ $query.= '
+ WHERE ';
+ $is_first = true;
+ foreach ($dbfields['primary'] as $key)
+ {
+ if (!$is_first)
+ {
+ $query.= ' AND ';
+ }
+ if ( isset($data[$key]) )
+ {
+ $query.= $key.' = \''.$data[$key].'\'';
+ }
+ else
+ {
+ $query.= $key.' IS NULL';
+ }
+ $is_first = false;
+ }
+ pwg_query($query);
+ }
+ } // foreach update
+ } // if mysql_ver or count<X
+ else
+ {
+ // creation of the temporary table
+ $query = '
+SHOW FULL COLUMNS FROM '.$tablename;
+ $result = pwg_query($query);
+ $columns = array();
+ $all_fields = array_merge($dbfields['primary'], $dbfields['update']);
+ while ($row = pwg_db_fetch_assoc($result))
+ {
+ if (in_array($row['Field'], $all_fields))
+ {
+ $column = $row['Field'];
+ $column.= ' '.$row['Type'];
+
+ $nullable = true;
+ if (!isset($row['Null']) or $row['Null'] == '' or $row['Null']=='NO')
+ {
+ $column.= ' NOT NULL';
+ $nullable = false;
+ }
+ if (isset($row['Default']))
+ {
+ $column.= " default '".$row['Default']."'";
+ }
+ elseif ($nullable)
+ {
+ $column.= " default NULL";
+ }
+ if (isset($row['Collation']) and $row['Collation'] != 'NULL')
+ {
+ $column.= " collate '".$row['Collation']."'";
+ }
+ array_push($columns, $column);
+ }
+ }
+
+ $temporary_tablename = $tablename.'_'.micro_seconds();
+
+ $query = '
+CREATE TABLE '.$temporary_tablename.'
+(
+ '.implode(",\n ", $columns).',
+ UNIQUE KEY the_key ('.implode(',', $dbfields['primary']).')
+)';
+
+ pwg_query($query);
+ mass_inserts($temporary_tablename, $all_fields, $datas);
+ if ( $flags & MASS_UPDATES_SKIP_EMPTY )
+ $func_set = create_function('$s', 'return "t1.$s = IFNULL(t2.$s, t1.$s)";');
+ else
+ $func_set = create_function('$s', 'return "t1.$s = t2.$s";');
+
+ // update of images table by joining with temporary table
+ $query = '
+UPDATE '.$tablename.' AS t1, '.$temporary_tablename.' AS t2
+ SET '.
+ implode(
+ "\n , ",
+ array_map($func_set,$dbfields['update'])
+ ).'
+ WHERE '.
+ implode(
+ "\n AND ",
+ array_map(
+ create_function('$s', 'return "t1.$s = t2.$s";'),
+ $dbfields['primary']
+ )
+ );
+ pwg_query($query);
+ $query = '
+DROP TABLE '.$temporary_tablename;
+ pwg_query($query);
+ }
+}
+
+
+/**
+ * inserts multiple lines in a table
+ *
+ * @param string table_name
+ * @param array dbfields
+ * @param array inserts
+ * @return void
+ */
+function mass_inserts($table_name, $dbfields, $datas)
+{
+ if (count($datas) != 0)
+ {
+ $first = true;
+
+ $query = 'SHOW VARIABLES LIKE \'max_allowed_packet\'';
+ list(, $packet_size) = pwg_db_fetch_row(pwg_query($query));
+ $packet_size = $packet_size - 2000; // The last list of values MUST not exceed 2000 character*/
+ $query = '';
+
+ foreach ($datas as $insert)
+ {
+ if (strlen($query) >= $packet_size)
+ {
+ pwg_query($query);
+ $first = true;
+ }
+
+ if ($first)
+ {
+ $query = '
+INSERT INTO '.$table_name.'
+ ('.implode(',', $dbfields).')
+ VALUES';
+ $first = false;
+ }
+ else
+ {
+ $query .= '
+ , ';
+ }
+
+ $query .= '(';
+ foreach ($dbfields as $field_id => $dbfield)
+ {
+ if ($field_id > 0)
+ {
+ $query .= ',';
+ }
+
+ if (!isset($insert[$dbfield]) or $insert[$dbfield] === '')
+ {
+ $query .= 'NULL';
+ }
+ else
+ {
+ $query .= "'".$insert[$dbfield]."'";
+ }
+ }
+ $query .= ')';
+ }
+ Log::getInstance()->debug($query);
+ pwg_query($query);
+ }
+}
+
+/**
+ * Do maintenance on all PWG tables
+ *
+ * @return none
+ */
+function do_maintenance_all_tables()
+{
+ global $prefixeTable, $page;
+
+ $all_tables = array();
+
+ // List all tables
+ $query = 'SHOW TABLES LIKE \''.$prefixeTable.'%\'';
+ $result = pwg_query($query);
+ while ($row = pwg_db_fetch_assoc($result))
+ {
+ array_push($all_tables, $row[0]);
+ }
+
+ // Repair all tables
+ $query = 'REPAIR TABLE '.implode(', ', $all_tables);
+ $mysql_rc = pwg_query($query);
+
+ // Re-Order all tables
+ foreach ($all_tables as $table_name)
+ {
+ $all_primary_key = array();
+
+ $query = 'DESC '.$table_name.';';
+ $result = pwg_query($query);
+ while ($row = pwg_db_fetch_assoc($result))
+ {
+ if ($row['Key'] == 'PRI')
+ {
+ array_push($all_primary_key, $row['Field']);
+ }
+ }
+
+ if (count($all_primary_key) != 0)
+ {
+ $query = 'ALTER TABLE '.$table_name.' ORDER BY '.implode(', ', $all_primary_key).';';
+ $mysql_rc = $mysql_rc && pwg_query($query);
+ }
+ }
+
+ // Optimize all tables
+ $query = 'OPTIMIZE TABLE '.implode(', ', $all_tables);
+ $mysql_rc = $mysql_rc && pwg_query($query);
+ if ($mysql_rc)
+ {
+ array_push(
+ $page['infos'],
+ l10n('Optimizations completed')
+ );
+ }
+ else
+ {
+ array_push(
+ $page['errors'],
+ l10n('Optimizations errors')
+ );
+ }
+}
+
+// my_error returns (or send to standard output) the message concerning the
+// error occured for the last mysql query.
+function my_error($header, $die)
+{
+ $error = "[mysql error ".mysql_errno().'] '.mysql_error()."\n";
+ $error .= $header;
+
+ if ($die)
+ {
+ fatal_error($error);
+ }
+ echo("<pre>");
+ trigger_error($error, E_USER_WARNING);
+ echo("</pre>");
+}
+
+?> \ No newline at end of file
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