WordPress/wp-admin/upgrade-schema.php

<?php
// Here we keep the DB structure and option values

$charset_collate = '';

if ( version_compare(mysql_get_server_info(), '4.1.0', '>=') ) {
	if ( ! empty($wpdb->charset) )
		$charset_collate = "DEFAULT CHARACTER SET $wpdb->charset";
	if ( ! empty($wpdb->collate) )
		$charset_collate .= " COLLATE $wpdb->collate";
}

$wp_queries="CREATE TABLE $wpdb->categories (
  cat_ID bigint(20) NOT NULL auto_increment,
  cat_name varchar(55) NOT NULL default '',
  category_nicename varchar(200) NOT NULL default '',
  category_description longtext NOT NULL,
  category_parent bigint(20) NOT NULL default '0',
  category_count bigint(20) NOT NULL default '0',
  link_count bigint(20) NOT NULL default '0',
  tag_count bigint(20) NOT NULL default '0',
  posts_private tinyint(1) NOT NULL default '0',
  links_private tinyint(1) NOT NULL default '0',
  PRIMARY KEY  (cat_ID),
  KEY category_nicename (category_nicename)
) $charset_collate;
CREATE TABLE $wpdb->comments (
  comment_ID bigint(20) unsigned NOT NULL auto_increment,
  comment_post_ID int(11) NOT NULL default '0',
  comment_author tinytext NOT NULL,
  comment_author_email varchar(100) NOT NULL default '',
  comment_author_url varchar(200) NOT NULL default '',
  comment_author_IP varchar(100) NOT NULL default '',
  comment_date datetime NOT NULL default '0000-00-00 00:00:00',
  comment_date_gmt datetime NOT NULL default '0000-00-00 00:00:00',
  comment_content text NOT NULL,
  comment_karma int(11) NOT NULL default '0',
  comment_approved enum('0','1','spam') NOT NULL default '1',
  comment_agent varchar(255) NOT NULL default '',
  comment_type varchar(20) NOT NULL default '',
  comment_parent bigint(20) NOT NULL default '0',
  user_id bigint(20) NOT NULL default '0',
  PRIMARY KEY  (comment_ID),
  KEY comment_approved (comment_approved),
  KEY comment_post_ID (comment_post_ID)
) $charset_collate;
CREATE TABLE $wpdb->link2cat (
  rel_id bigint(20) NOT NULL auto_increment,
  link_id bigint(20) NOT NULL default '0',
  category_id bigint(20) NOT NULL default '0',
  PRIMARY KEY  (rel_id),
  KEY link_id (link_id,category_id)
) $charset_collate;
CREATE TABLE $wpdb->links (
  link_id bigint(20) NOT NULL auto_increment,
  link_url varchar(255) NOT NULL default '',
  link_name varchar(255) NOT NULL default '',
  link_image varchar(255) NOT NULL default '',
  link_target varchar(25) NOT NULL default '',
  link_category bigint(20) NOT NULL default '0',
  link_description varchar(255) NOT NULL default '',
  link_visible enum('Y','N') NOT NULL default 'Y',
  link_owner int(11) NOT NULL default '1',
  link_rating int(11) NOT NULL default '0',
  link_updated datetime NOT NULL default '0000-00-00 00:00:00',
  link_rel varchar(255) NOT NULL default '',
  link_notes mediumtext NOT NULL,
  link_rss varchar(255) NOT NULL default '',
  PRIMARY KEY  (link_id),
  KEY link_category (link_category),
  KEY link_visible (link_visible)
) $charset_collate;
CREATE TABLE $wpdb->options (
  option_id bigint(20) NOT NULL auto_increment,
  blog_id int(11) NOT NULL default '0',
  option_name varchar(64) NOT NULL default '',
  option_can_override enum('Y','N') NOT NULL default 'Y',
  option_type int(11) NOT NULL default '1',
  option_value longtext NOT NULL,
  option_width int(11) NOT NULL default '20',
  option_height int(11) NOT NULL default '8',
  option_description tinytext NOT NULL,
  option_admin_level int(11) NOT NULL default '1',
  autoload enum('yes','no') NOT NULL default 'yes',
  PRIMARY KEY  (option_id,blog_id,option_name),
  KEY option_name (option_name)
) $charset_collate;
CREATE TABLE $wpdb->post2cat (
  rel_id bigint(20) NOT NULL auto_increment,
  post_id bigint(20) NOT NULL default '0',
  category_id bigint(20) NOT NULL default '0',
  rel_type varchar(64) NOT NULL default 'category',
  PRIMARY KEY  (rel_id),
  KEY post_id (post_id,category_id)
) $charset_collate;
CREATE TABLE $wpdb->postmeta (
  meta_id bigint(20) NOT NULL auto_increment,
  post_id bigint(20) NOT NULL default '0',
  meta_key varchar(255) default NULL,
  meta_value longtext,
  PRIMARY KEY  (meta_id),
  KEY post_id (post_id),
  KEY meta_key (meta_key)
) $charset_collate;
CREATE TABLE $wpdb->posts (
  ID bigint(20) unsigned NOT NULL auto_increment,
  post_author bigint(20) NOT NULL default '0',
  post_date datetime NOT NULL default '0000-00-00 00:00:00',
  post_date_gmt datetime NOT NULL default '0000-00-00 00:00:00',
  post_content longtext NOT NULL,
  post_title text NOT NULL,
  post_category int(4) NOT NULL default '0',
  post_excerpt text NOT NULL,
  post_status enum('publish','draft','private','static','object','attachment','inherit','future') NOT NULL default 'publish',
  comment_status enum('open','closed','registered_only') NOT NULL default 'open',
  ping_status enum('open','closed') NOT NULL default 'open',
  post_password varchar(20) NOT NULL default '',
  post_name varchar(200) NOT NULL default '',
  to_ping text NOT NULL,
  pinged text NOT NULL,
  post_modified datetime NOT NULL default '0000-00-00 00:00:00',
  post_modified_gmt datetime NOT NULL default '0000-00-00 00:00:00',
  post_content_filtered text NOT NULL,
  post_parent bigint(20) NOT NULL default '0',
  guid varchar(255) NOT NULL default '',
  menu_order int(11) NOT NULL default '0',
  post_type varchar(20) NOT NULL default 'post',
  post_mime_type varchar(100) NOT NULL default '',
  comment_count bigint(20) NOT NULL default '0',
  PRIMARY KEY  (ID),
  KEY post_name (post_name),
  KEY type_status_date (post_type,post_status,post_date,ID)
) $charset_collate;
CREATE TABLE $wpdb->users (
  ID bigint(20) unsigned NOT NULL auto_increment,
  user_login varchar(60) NOT NULL default '',
  user_pass varchar(64) NOT NULL default '',
  user_nicename varchar(50) NOT NULL default '',
  user_email varchar(100) NOT NULL default '',
  user_url varchar(100) NOT NULL default '',
  user_registered datetime NOT NULL default '0000-00-00 00:00:00',
  user_activation_key varchar(60) NOT NULL default '',
  user_status int(11) NOT NULL default '0',
  display_name varchar(250) NOT NULL default '',
  PRIMARY KEY  (ID),
  KEY user_login_key (user_login)
) $charset_collate;
CREATE TABLE $wpdb->usermeta (
  umeta_id bigint(20) NOT NULL auto_increment,
  user_id bigint(20) NOT NULL default '0',
  meta_key varchar(255) default NULL,
  meta_value longtext,
  PRIMARY KEY  (umeta_id),
  KEY user_id (user_id),
  KEY meta_key (meta_key)
) $charset_collate;";

function populate_options() {
	global $wpdb, $wp_db_version;

	$schema = ( isset($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) == 'on' ) ? 'https://' : 'http://';
	$guessurl = preg_replace('|/wp-admin/.*|i', '', $schema . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']);
	add_option('siteurl', $guessurl, __('WordPress web address'));
	add_option('blogname', __('My Weblog'), __('Blog title'));
	add_option('blogdescription', __('Just another WordPress weblog'), __('Short tagline'));
	add_option('new_users_can_blog', 0);
	add_option('users_can_register', 0);
	add_option('admin_email', 'you@example.com');
	add_option('start_of_week', 1);
	add_option('use_balanceTags', 0);
	add_option('use_smilies', 1);
	add_option('require_name_email', 1);
	add_option('comments_notify', 1);
	add_option('posts_per_rss', 10);
	add_option('rss_excerpt_length', 50);
	add_option('rss_use_excerpt', 0);
	add_option('mailserver_url', 'mail.example.com');
	add_option('mailserver_login', 'login@example.com');
	add_option('mailserver_pass', 'password');
	add_option('mailserver_port', 110);
	add_option('default_category', 1);
	add_option('default_comment_status', 'open');
	add_option('default_ping_status', 'open');
	add_option('default_pingback_flag', 1);
	add_option('default_post_edit_rows', 10);
	add_option('posts_per_page', 10);
	add_option('what_to_show', 'posts');
	add_option('date_format', __('F j, Y'));
	add_option('time_format', __('g:i a'));
	add_option('links_updated_date_format', __('F j, Y g:i a'));
	add_option('links_recently_updated_prepend', '<em>');
	add_option('links_recently_updated_append', '</em>');
	add_option('links_recently_updated_time', 120);
	add_option('comment_moderation', 0);
	add_option('moderation_notify', 1);
	add_option('permalink_structure');
	add_option('gzipcompression', 0);
	add_option('hack_file', 0);
	add_option('blog_charset', 'UTF-8');
	add_option('moderation_keys');
	add_option('active_plugins');
	add_option('home', $guessurl);
	// in case it is set, but blank, update "home"
	if ( !__get_option('home') ) update_option('home', $guessurl);
	add_option('category_base');
	add_option('ping_sites', 'http://rpc.pingomatic.com/');
	add_option('advanced_edit', 0);
	add_option('comment_max_links', 2);
	add_option('gmt_offset', date('Z') / 3600);
	// 1.5
	add_option('default_email_category', 1, __('Posts by email go to this category'));
	add_option('recently_edited');
	add_option('use_linksupdate', 0);
	add_option('template', 'default');
	add_option('stylesheet', 'default');
	add_option('comment_whitelist', 1);
	add_option('page_uris');
	add_option('blacklist_keys');
	add_option('comment_registration', 0);
	add_option('rss_language', 'en');
	add_option('html_type', 'text/html');
	// 1.5.1
	add_option('use_trackback', 0);
	// 2.0
	add_option('default_role', 'subscriber');
	add_option('db_version', $wp_db_version);
	// 2.0.1
	if ( ini_get('safe_mode') ) {
		// Safe mode screws up mkdir(), so we must use a flat structure.
		add_option('uploads_use_yearmonth_folders', 0);
		add_option('upload_path', 'wp-content');
	} else {
		add_option('uploads_use_yearmonth_folders', 1);
		add_option('upload_path', 'wp-content/uploads');
	}

	// 2.0.3
	add_option('secret', md5(uniqid(microtime())));

	// 2.1
	add_option('blog_public', '1');
	add_option('default_link_category', 2);
	add_option('show_on_front', 'posts');

	// 2.2
	add_option('tag_base');

	// Delete unused options
	$unusedoptions = array ('blodotgsping_url', 'bodyterminator', 'emailtestonly', 'phoneemail_separator', 'smilies_directory', 'subjectprefix', 'use_bbcode', 'use_blodotgsping', 'use_phoneemail', 'use_quicktags', 'use_weblogsping', 'weblogs_cache_file', 'use_preview', 'use_htmltrans', 'smilies_directory', 'fileupload_allowedusers', 'use_phoneemail', 'default_post_status', 'default_post_category', 'archive_mode', 'time_difference', 'links_minadminlevel', 'links_use_adminlevels', 'links_rating_type', 'links_rating_char', 'links_rating_ignore_zero', 'links_rating_single_image', 'links_rating_image0', 'links_rating_image1', 'links_rating_image2', 'links_rating_image3', 'links_rating_image4', 'links_rating_image5', 'links_rating_image6', 'links_rating_image7', 'links_rating_image8', 'links_rating_image9', 'weblogs_cacheminutes', 'comment_allowed_tags', 'search_engine_friendly_urls', 'default_geourl_lat', 'default_geourl_lon', 'use_default_geourl', 'weblogs_xml_url', 'new_users_can_blog', '_wpnonce', '_wp_http_referer', 'Update', 'action', 'rich_editing');
	foreach ($unusedoptions as $option) :
		delete_option($option);
	endforeach;

	// Set up a few options not to load by default
	$fatoptions = array( 'moderation_keys', 'recently_edited', 'blacklist_keys' );
	foreach ($fatoptions as $fatoption) :
		$wpdb->query("UPDATE $wpdb->options SET `autoload` = 'no' WHERE option_name = '$fatoption'");
	endforeach;
}

function populate_roles() {
	populate_roles_160();
	populate_roles_210();
}

function populate_roles_160() {
	global $wp_roles;

	// Add roles
	add_role('administrator', __('Administrator'));
	add_role('editor', __('Editor'));
	add_role('author', __('Author'));
	add_role('contributor', __('Contributor'));
	add_role('subscriber', __('Subscriber'));

	// Add caps for Administrator role
	$role = get_role('administrator');
	$role->add_cap('switch_themes');
	$role->add_cap('edit_themes');
	$role->add_cap('activate_plugins');
	$role->add_cap('edit_plugins');
	$role->add_cap('edit_users');
	$role->add_cap('edit_files');
	$role->add_cap('manage_options');
	$role->add_cap('moderate_comments');
	$role->add_cap('manage_categories');
	$role->add_cap('manage_links');
	$role->add_cap('upload_files');
	$role->add_cap('import');
	$role->add_cap('unfiltered_html');
	$role->add_cap('edit_posts');
	$role->add_cap('edit_others_posts');
	$role->add_cap('edit_published_posts');
	$role->add_cap('publish_posts');
	$role->add_cap('edit_pages');
	$role->add_cap('read');
	$role->add_cap('level_10');
	$role->add_cap('level_9');
	$role->add_cap('level_8');
	$role->add_cap('level_7');
	$role->add_cap('level_6');
	$role->add_cap('level_5');
	$role->add_cap('level_4');
	$role->add_cap('level_3');
	$role->add_cap('level_2');
	$role->add_cap('level_1');
	$role->add_cap('level_0');

	// Add caps for Editor role
	$role = get_role('editor');
	$role->add_cap('moderate_comments');
	$role->add_cap('manage_categories');
	$role->add_cap('manage_links');
	$role->add_cap('upload_files');
	$role->add_cap('unfiltered_html');
	$role->add_cap('edit_posts');
	$role->add_cap('edit_others_posts');
	$role->add_cap('edit_published_posts');
	$role->add_cap('publish_posts');
	$role->add_cap('edit_pages');
	$role->add_cap('read');
	$role->add_cap('level_7');
	$role->add_cap('level_6');
	$role->add_cap('level_5');
	$role->add_cap('level_4');
	$role->add_cap('level_3');
	$role->add_cap('level_2');
	$role->add_cap('level_1');
	$role->add_cap('level_0');

	// Add caps for Author role
	$role = get_role('author');
	$role->add_cap('upload_files');
	$role->add_cap('edit_posts');
	$role->add_cap('edit_published_posts');
	$role->add_cap('publish_posts');
	$role->add_cap('read');
	$role->add_cap('level_2');
	$role->add_cap('level_1');
	$role->add_cap('level_0');

	// Add caps for Contributor role
	$role = get_role('contributor');
	$role->add_cap('edit_posts');
	$role->add_cap('read');
	$role->add_cap('level_1');
	$role->add_cap('level_0');

	// Add caps for Subscriber role
	$role = get_role('subscriber');
	$role->add_cap('read');
	$role->add_cap('level_0');
}

function populate_roles_210() {
	$roles = array('administrator', 'editor');
	foreach ($roles as $role) {
		$role = get_role($role);
		if ( empty($role) )
			continue;

		$role->add_cap('edit_others_pages');
		$role->add_cap('edit_published_pages');
		$role->add_cap('publish_pages');
		$role->add_cap('delete_pages');
		$role->add_cap('delete_others_pages');
		$role->add_cap('delete_published_pages');
		$role->add_cap('delete_posts');
		$role->add_cap('delete_others_posts');
		$role->add_cap('delete_published_posts');
		$role->add_cap('delete_private_posts');
		$role->add_cap('edit_private_posts');
		$role->add_cap('read_private_posts');
		$role->add_cap('delete_private_pages');
		$role->add_cap('edit_private_pages');
		$role->add_cap('read_private_pages');
	}

	$role = get_role('administrator');
	if ( ! empty($role) ) {
		$role->add_cap('delete_users');
		$role->add_cap('create_users');
	}

	$role = get_role('author');
	if ( ! empty($role) ) {
		$role->add_cap('delete_posts');
		$role->add_cap('delete_published_posts');
	}

	$role = get_role('contributor');
	if ( ! empty($role) ) {
		$role->add_cap('delete_posts');
	}
}

?>