Merge pull request #5166 from annando/unsed-item-fields

[friendica.git] / database.sql

diff --git a/database.sql b/database.sql
index ffe02585e2be257fd6e09c6e4cb5d5c2a78c65f5..b186c0c0aa405de1a4a9c5f930ad328738eac33b 100644 (file)
--- a/database.sql
+++ b/database.sql
@@ -1,6 +1,6 @@
 -- ------------------------------------------
 -- Friendica 2018.08-dev (The Tazmans Flax-lily)
--- DB_UPDATE_VERSION 1267
+-- DB_UPDATE_VERSION 1268
 -- ------------------------------------------
 
 
@@ -17,7 +17,7 @@ CREATE TABLE IF NOT EXISTS `addon` (
        `plugin_admin` boolean NOT NULL DEFAULT '0' COMMENT '1 = has admin config, 0 = has no admin config',
         PRIMARY KEY(`id`),
         UNIQUE INDEX `name` (`name`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='registered addons';
 
 --
 -- TABLE attach
@@ -37,7 +37,7 @@ CREATE TABLE IF NOT EXISTS `attach` (
        `deny_cid` mediumtext COMMENT 'Access Control - list of denied contact.id',
        `deny_gid` mediumtext COMMENT 'Access Control - list of denied groups',
         PRIMARY KEY(`id`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='file attachments';
 
 --
 -- TABLE auth_codes
@@ -49,7 +49,7 @@ CREATE TABLE IF NOT EXISTS `auth_codes` (
        `expires` int NOT NULL DEFAULT 0 COMMENT '',
        `scope` varchar(250) NOT NULL DEFAULT '' COMMENT '',
         PRIMARY KEY(`id`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='OAuth usage';
 
 --
 -- TABLE cache
@@ -61,7 +61,7 @@ CREATE TABLE IF NOT EXISTS `cache` (
        `updated` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT 'datetime of cache insertion',
         PRIMARY KEY(`k`),
         INDEX `k_expires` (`k`,`expires`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Stores temporary data';
 
 --
 -- TABLE challenge
@@ -74,7 +74,7 @@ CREATE TABLE IF NOT EXISTS `challenge` (
        `type` varchar(255) NOT NULL DEFAULT '' COMMENT '',
        `last_update` varchar(255) NOT NULL DEFAULT '' COMMENT '',
         PRIMARY KEY(`id`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='';
 
 --
 -- TABLE clients
@@ -87,7 +87,7 @@ CREATE TABLE IF NOT EXISTS `clients` (
        `icon` text COMMENT '',
        `uid` mediumint unsigned NOT NULL DEFAULT 0 COMMENT 'User id',
         PRIMARY KEY(`client_id`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='OAuth usage';
 
 --
 -- TABLE config
@@ -99,7 +99,7 @@ CREATE TABLE IF NOT EXISTS `config` (
        `v` mediumtext COMMENT '',
         PRIMARY KEY(`id`),
         UNIQUE INDEX `cat_k` (`cat`,`k`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='main configuration storage';
 
 --
 -- TABLE contact
@@ -186,7 +186,7 @@ CREATE TABLE IF NOT EXISTS `contact` (
         INDEX `nick_uid` (`nick`(32),`uid`),
         INDEX `dfrn-id` (`dfrn-id`(64)),
         INDEX `issued-id` (`issued-id`(64))
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='contact table';
 
 --
 -- TABLE conv
@@ -202,7 +202,7 @@ CREATE TABLE IF NOT EXISTS `conv` (
        `subject` text COMMENT 'subject of initial message',
         PRIMARY KEY(`id`),
         INDEX `uid` (`uid`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='private messages';
 
 --
 -- TABLE conversation
@@ -218,7 +218,7 @@ CREATE TABLE IF NOT EXISTS `conversation` (
         PRIMARY KEY(`item-uri`),
         INDEX `conversation-uri` (`conversation-uri`),
         INDEX `received` (`received`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Raw data and structure information for messages';
 
 --
 -- TABLE event
@@ -246,7 +246,7 @@ CREATE TABLE IF NOT EXISTS `event` (
        `deny_gid` mediumtext COMMENT 'Access Control - list of denied groups',
         PRIMARY KEY(`id`),
         INDEX `uid_start` (`uid`,`start`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Events';
 
 --
 -- TABLE fcontact
@@ -272,7 +272,7 @@ CREATE TABLE IF NOT EXISTS `fcontact` (
         PRIMARY KEY(`id`),
         INDEX `addr` (`addr`(32)),
         UNIQUE INDEX `url` (`url`(190))
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Diaspora compatible contacts - used in the Diaspora implementation';
 
 --
 -- TABLE fsuggest
@@ -288,7 +288,7 @@ CREATE TABLE IF NOT EXISTS `fsuggest` (
        `note` text COMMENT '',
        `created` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT '',
         PRIMARY KEY(`id`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='friend suggestion stuff';
 
 --
 -- TABLE gcign
@@ -300,7 +300,7 @@ CREATE TABLE IF NOT EXISTS `gcign` (
         PRIMARY KEY(`id`),
         INDEX `uid` (`uid`),
         INDEX `gcid` (`gcid`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='contacts ignored by friend suggestions';
 
 --
 -- TABLE gcontact
@@ -339,7 +339,7 @@ CREATE TABLE IF NOT EXISTS `gcontact` (
         INDEX `addr` (`addr`(64)),
         INDEX `hide_network_updated` (`hide`,`network`,`updated`),
         INDEX `updated` (`updated`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='global contacts';
 
 --
 -- TABLE glink
@@ -354,7 +354,7 @@ CREATE TABLE IF NOT EXISTS `glink` (
         PRIMARY KEY(`id`),
         UNIQUE INDEX `cid_uid_gcid_zcid` (`cid`,`uid`,`gcid`,`zcid`),
         INDEX `gcid` (`gcid`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='\'friends of friends\' linkages derived from poco';
 
 --
 -- TABLE group
@@ -367,7 +367,7 @@ CREATE TABLE IF NOT EXISTS `group` (
        `name` varchar(255) NOT NULL DEFAULT '' COMMENT 'human readable name of group',
         PRIMARY KEY(`id`),
         INDEX `uid` (`uid`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='privacy groups, group info';
 
 --
 -- TABLE group_member
@@ -379,7 +379,7 @@ CREATE TABLE IF NOT EXISTS `group_member` (
         PRIMARY KEY(`id`),
         INDEX `contactid` (`contact-id`),
         UNIQUE INDEX `gid_contactid` (`gid`,`contact-id`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='privacy groups, member info';
 
 --
 -- TABLE gserver
@@ -405,7 +405,7 @@ CREATE TABLE IF NOT EXISTS `gserver` (
        `last_failure` datetime DEFAULT '0001-01-01 00:00:00' COMMENT '',
         PRIMARY KEY(`id`),
         UNIQUE INDEX `nurl` (`nurl`(190))
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Global servers';
 
 --
 -- TABLE gserver-tag
@@ -415,7 +415,7 @@ CREATE TABLE IF NOT EXISTS `gserver-tag` (
        `tag` varchar(100) NOT NULL DEFAULT '' COMMENT 'Tag that the server has subscribed',
         PRIMARY KEY(`gserver-id`,`tag`),
         INDEX `tag` (`tag`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Tags that the server has subscribed';
 
 --
 -- TABLE hook
@@ -428,7 +428,7 @@ CREATE TABLE IF NOT EXISTS `hook` (
        `priority` smallint unsigned NOT NULL DEFAULT 0 COMMENT 'not yet implemented - can be used to sort conflicts in hook handling by calling handlers in priority order',
         PRIMARY KEY(`id`),
         UNIQUE INDEX `hook_file_function` (`hook`,`file`,`function`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='addon hook registry';
 
 --
 -- TABLE intro
@@ -446,7 +446,7 @@ CREATE TABLE IF NOT EXISTS `intro` (
        `blocked` boolean NOT NULL DEFAULT '1' COMMENT '',
        `ignore` boolean NOT NULL DEFAULT '0' COMMENT '',
         PRIMARY KEY(`id`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='';
 
 --
 -- TABLE item
@@ -543,7 +543,7 @@ CREATE TABLE IF NOT EXISTS `item` (
         INDEX `uid_eventid` (`uid`,`event-id`),
         INDEX `uid_authorlink` (`uid`,`author-link`(190)),
         INDEX `uid_ownerlink` (`uid`,`owner-link`(190))
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='All posts';
 
 --
 -- TABLE locks
@@ -554,7 +554,7 @@ CREATE TABLE IF NOT EXISTS `locks` (
        `locked` boolean NOT NULL DEFAULT '0' COMMENT '',
        `pid` int unsigned NOT NULL DEFAULT 0 COMMENT 'Process ID',
         PRIMARY KEY(`id`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='';
 
 --
 -- TABLE mail
@@ -583,7 +583,7 @@ CREATE TABLE IF NOT EXISTS `mail` (
         INDEX `uri` (`uri`(64)),
         INDEX `parent-uri` (`parent-uri`(64)),
         INDEX `contactid` (`contact-id`(32))
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='private messages';
 
 --
 -- TABLE mailacct
@@ -603,7 +603,7 @@ CREATE TABLE IF NOT EXISTS `mailacct` (
        `pubmail` boolean NOT NULL DEFAULT '0' COMMENT '',
        `last_check` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT '',
         PRIMARY KEY(`id`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Mail account data for fetching mails';
 
 --
 -- TABLE manage
@@ -614,7 +614,7 @@ CREATE TABLE IF NOT EXISTS `manage` (
        `mid` mediumint unsigned NOT NULL DEFAULT 0 COMMENT 'User id',
         PRIMARY KEY(`id`),
         UNIQUE INDEX `uid_mid` (`uid`,`mid`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='table of accounts that can manage each other';
 
 --
 -- TABLE notify
@@ -642,7 +642,7 @@ CREATE TABLE IF NOT EXISTS `notify` (
         INDEX `seen_uid_date` (`seen`,`uid`,`date`),
         INDEX `uid_date` (`uid`,`date`),
         INDEX `uid_type_link` (`uid`,`type`,`link`(190))
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='notifications';
 
 --
 -- TABLE notify-threads
@@ -654,7 +654,7 @@ CREATE TABLE IF NOT EXISTS `notify-threads` (
        `parent-item` int unsigned NOT NULL DEFAULT 0 COMMENT '',
        `receiver-uid` mediumint unsigned NOT NULL DEFAULT 0 COMMENT 'User id',
         PRIMARY KEY(`id`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='';
 
 --
 -- TABLE oembed
@@ -666,7 +666,7 @@ CREATE TABLE IF NOT EXISTS `oembed` (
        `created` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT 'datetime of creation',
         PRIMARY KEY(`url`,`maxwidth`),
         INDEX `created` (`created`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='cache for OEmbed queries';
 
 --
 -- TABLE parsed_url
@@ -679,7 +679,7 @@ CREATE TABLE IF NOT EXISTS `parsed_url` (
        `created` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT 'datetime of creation',
         PRIMARY KEY(`url`,`guessing`,`oembed`),
         INDEX `created` (`created`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='cache for \'parse_url\' queries';
 
 --
 -- TABLE participation
@@ -690,7 +690,7 @@ CREATE TABLE IF NOT EXISTS `participation` (
        `cid` int unsigned NOT NULL COMMENT '',
        `fid` int unsigned NOT NULL COMMENT '',
         PRIMARY KEY(`iid`,`server`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Storage for participation messages from Diaspora';
 
 --
 -- TABLE pconfig
@@ -703,7 +703,7 @@ CREATE TABLE IF NOT EXISTS `pconfig` (
        `v` mediumtext COMMENT '',
         PRIMARY KEY(`id`),
         UNIQUE INDEX `uid_cat_k` (`uid`,`cat`,`k`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='personal (per user) configuration storage';
 
 --
 -- TABLE photo
@@ -738,7 +738,7 @@ CREATE TABLE IF NOT EXISTS `photo` (
         INDEX `uid_album_scale_created` (`uid`,`album`(32),`scale`,`created`),
         INDEX `uid_album_resource-id_created` (`uid`,`album`(32),`resource-id`,`created`),
         INDEX `resource-id` (`resource-id`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='photo storage';
 
 --
 -- TABLE poll
@@ -758,7 +758,7 @@ CREATE TABLE IF NOT EXISTS `poll` (
        `q9` text COMMENT '',
         PRIMARY KEY(`id`),
         INDEX `uid` (`uid`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Currently unused table for storing poll results';
 
 --
 -- TABLE poll_result
@@ -769,7 +769,7 @@ CREATE TABLE IF NOT EXISTS `poll_result` (
        `choice` tinyint unsigned NOT NULL DEFAULT 0 COMMENT '',
         PRIMARY KEY(`id`),
         INDEX `poll_id` (`poll_id`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='data for polls - currently unused';
 
 --
 -- TABLE process
@@ -780,7 +780,7 @@ CREATE TABLE IF NOT EXISTS `process` (
        `created` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT '',
         PRIMARY KEY(`pid`),
         INDEX `command` (`command`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Currently running system processes';
 
 --
 -- TABLE profile
@@ -830,7 +830,7 @@ CREATE TABLE IF NOT EXISTS `profile` (
        `net-publish` boolean NOT NULL DEFAULT '0' COMMENT 'publish profile in global directory',
         PRIMARY KEY(`id`),
         INDEX `uid_is-default` (`uid`,`is-default`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='user profiles data';
 
 --
 -- TABLE profile_check
@@ -843,7 +843,7 @@ CREATE TABLE IF NOT EXISTS `profile_check` (
        `sec` varchar(255) NOT NULL DEFAULT '' COMMENT '',
        `expire` int unsigned NOT NULL DEFAULT 0 COMMENT '',
         PRIMARY KEY(`id`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='DFRN remote auth use';
 
 --
 -- TABLE push_subscriber
@@ -861,7 +861,7 @@ CREATE TABLE IF NOT EXISTS `push_subscriber` (
        `secret` varchar(255) NOT NULL DEFAULT '' COMMENT '',
         PRIMARY KEY(`id`),
         INDEX `next_try` (`next_try`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Used for OStatus: Contains feed subscribers';
 
 --
 -- TABLE queue
@@ -880,7 +880,7 @@ CREATE TABLE IF NOT EXISTS `queue` (
         PRIMARY KEY(`id`),
         INDEX `last` (`last`),
         INDEX `next` (`next`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Queue for messages that couldn\'t be delivered';
 
 --
 -- TABLE register
@@ -894,7 +894,7 @@ CREATE TABLE IF NOT EXISTS `register` (
        `language` varchar(16) NOT NULL DEFAULT '' COMMENT '',
        `note` text COMMENT '',
         PRIMARY KEY(`id`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='registrations requiring admin approval';
 
 --
 -- TABLE search
@@ -905,7 +905,7 @@ CREATE TABLE IF NOT EXISTS `search` (
        `term` varchar(255) NOT NULL DEFAULT '' COMMENT '',
         PRIMARY KEY(`id`),
         INDEX `uid` (`uid`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='';
 
 --
 -- TABLE session
@@ -918,7 +918,7 @@ CREATE TABLE IF NOT EXISTS `session` (
         PRIMARY KEY(`id`),
         INDEX `sid` (`sid`(64)),
         INDEX `expire` (`expire`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='web session storage';
 
 --
 -- TABLE sign
@@ -931,7 +931,7 @@ CREATE TABLE IF NOT EXISTS `sign` (
        `signer` varchar(255) NOT NULL DEFAULT '' COMMENT '',
         PRIMARY KEY(`id`),
         UNIQUE INDEX `iid` (`iid`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Diaspora signatures';
 
 --
 -- TABLE term
@@ -954,7 +954,7 @@ CREATE TABLE IF NOT EXISTS `term` (
         INDEX `uid_otype_type_term_global_created` (`uid`,`otype`,`type`,`term`(32),`global`,`created`),
         INDEX `uid_otype_type_url` (`uid`,`otype`,`type`,`url`(64)),
         INDEX `guid` (`guid`(64))
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='item taxonomy (categories, tags, etc.) table';
 
 --
 -- TABLE thread
@@ -996,7 +996,7 @@ CREATE TABLE IF NOT EXISTS `thread` (
         INDEX `uid_commented` (`uid`,`commented`),
         INDEX `uid_wall_created` (`uid`,`wall`,`created`),
         INDEX `private_wall_origin_commented` (`private`,`wall`,`origin`,`commented`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Thread related data';
 
 --
 -- TABLE tokens
@@ -1009,7 +1009,7 @@ CREATE TABLE IF NOT EXISTS `tokens` (
        `scope` varchar(200) NOT NULL DEFAULT '' COMMENT '',
        `uid` mediumint unsigned NOT NULL DEFAULT 0 COMMENT 'User id',
         PRIMARY KEY(`id`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='OAuth usage';
 
 --
 -- TABLE user
@@ -1062,7 +1062,7 @@ CREATE TABLE IF NOT EXISTS `user` (
        `openidserver` text COMMENT '',
         PRIMARY KEY(`uid`),
         INDEX `nickname` (`nickname`(32))
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='The local users';
 
 --
 -- TABLE userd
@@ -1072,7 +1072,7 @@ CREATE TABLE IF NOT EXISTS `userd` (
        `username` varchar(255) NOT NULL COMMENT '',
         PRIMARY KEY(`id`),
         INDEX `username` (`username`(32))
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Deleted usernames';
 
 --
 -- TABLE user-item
@@ -1082,7 +1082,16 @@ CREATE TABLE IF NOT EXISTS `user-item` (
        `uid` mediumint unsigned NOT NULL DEFAULT 0 COMMENT 'User id',
        `hidden` boolean NOT NULL DEFAULT '0' COMMENT 'Marker to hide an item from the user',
         PRIMARY KEY(`uid`,`iid`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='User specific item data';
+
+--
+-- TABLE worker-ipc
+--
+CREATE TABLE IF NOT EXISTS `worker-ipc` (
+       `key` int NOT NULL COMMENT '',
+       `jobs` boolean COMMENT 'Flag for outstanding jobs',
+        PRIMARY KEY(`key`)
+) ENGINE=MEMORY DEFAULT COLLATE utf8mb4_general_ci COMMENT='Inter process communication between the frontend and the worker';
 
 --
 -- TABLE workerqueue
@@ -1100,6 +1109,6 @@ CREATE TABLE IF NOT EXISTS `workerqueue` (
         INDEX `parameter` (`parameter`(64)),
         INDEX `priority_created` (`priority`,`created`),
         INDEX `done_executed` (`done`,`executed`)
-) DEFAULT COLLATE utf8mb4_general_ci;
+) DEFAULT COLLATE utf8mb4_general_ci COMMENT='Background tasks queue entries';