-- IBM DB2

-- SQL to create the initial tables for the MediaWiki database.
-- This is read and executed by the install script; you should
-- not have to run it by itself unless doing a manual install.

-- Notes: 
--  * DB2 will convert all table and column names to all caps internally.
--  * DB2 has a 32k limit on SQL filesize, so it may be necessary
--     to split this into two files soon.


CREATE TABLE user (
  -- Needs to start with 0
  user_id                   BIGINT
    PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY (START WITH 0),
  user_name                 VARCHAR(255) NOT NULL UNIQUE,
  user_real_name            VARCHAR(255),
  user_password             VARCHAR(1024),
  user_newpassword          VARCHAR(1024),
  user_newpass_time         TIMESTAMP(3),
  user_token                VARCHAR(255),
  user_email                VARCHAR(1024),
  user_email_token          VARCHAR(255),
  user_email_token_expires  TIMESTAMP(3),
  user_email_authenticated  TIMESTAMP(3),
  -- obsolete, replace by user_properties table
  -- user_options              CLOB(64K) INLINE LENGTH 4096,
  user_touched              TIMESTAMP(3),
  user_registration         TIMESTAMP(3),
  user_editcount            INTEGER
);
CREATE INDEX user_email_token_idx
  ON user (user_email_token);
CREATE UNIQUE INDEX user_include_idx
  ON user (user_id)
  INCLUDE (user_name, user_real_name, user_password, user_newpassword,
    user_newpass_time, user_token,
    user_email, user_email_token, user_email_token_expires,
    user_email_authenticated,
    user_touched, user_registration, user_editcount);
CREATE UNIQUE INDEX user_email
  ON user (user_email);



-- Create a dummy user to satisfy fk contraints especially with revisions
INSERT INTO user(
  user_name,    user_real_name,           user_password,  user_newpassword,   user_newpass_time,
  user_email,   user_email_authenticated, user_token,     user_registration,  user_editcount
)
VALUES (
  'Anonymous',  '',                       NULL,           NULL,               CURRENT_TIMESTAMP,
  NULL,         NULL,                     NULL,           CURRENT_TIMESTAMP,  0
);



CREATE TABLE user_groups (
  ug_user   BIGINT NOT NULL DEFAULT 0,
  --    REFERENCES user(user_id) ON DELETE CASCADE,
  ug_group  VARCHAR(255) NOT NULL
);
CREATE INDEX user_groups_unique
  ON user_groups (ug_user, ug_group);



CREATE TABLE user_newtalk (
  -- registered users key
  user_id              BIGINT NOT NULL DEFAULT 0,
  --  REFERENCES user(user_id) ON DELETE CASCADE,
  -- anonymous users key
  user_ip              VARCHAR(40),
  user_last_timestamp  TIMESTAMP(3)
);
CREATE INDEX user_newtalk_id_idx
  ON user_newtalk (user_id);
CREATE INDEX user_newtalk_ip_idx
  ON user_newtalk (user_ip);
CREATE UNIQUE INDEX user_newtalk_include_idx
  ON user_newtalk (user_id, user_ip)
  INCLUDE (user_last_timestamp);



CREATE TABLE page (
  page_id            BIGINT
    PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY (START WITH 1),
  page_namespace     SMALLINT NOT NULL,
  page_title         VARCHAR(255) NOT NULL,
  page_restrictions  VARCHAR(1024),
  page_counter       BIGINT NOT NULL DEFAULT 0,
  page_is_redirect   SMALLINT NOT NULL DEFAULT 0,
  page_is_new        SMALLINT NOT NULL DEFAULT 0,
  page_random        NUMERIC(15,14) NOT NULL,
  page_touched       TIMESTAMP(3),
  page_latest        BIGINT NOT NULL, -- FK?
  page_len           BIGINT NOT NULL
);
CREATE UNIQUE INDEX page_unique_name
  ON page (page_namespace, page_title);
CREATE INDEX page_random_idx
  ON page (page_random);
CREATE INDEX page_len_idx
  ON page (page_len);
CREATE UNIQUE INDEX page_id_include
  ON page (page_id)
  INCLUDE (page_namespace, page_title, page_restrictions, page_counter, page_is_redirect, page_is_new, page_random, page_touched, page_latest, page_len);
CREATE UNIQUE INDEX page_name_include
  ON page (page_namespace, page_title)
  INCLUDE (page_id, page_restrictions, page_counter, page_is_redirect, page_is_new, page_random, page_touched, page_latest, page_len);



CREATE TABLE revision (
  rev_id            BIGINT
    PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY (START WITH 1),
  rev_page          BIGINT NOT NULL DEFAULT 0,
  --      REFERENCES page (page_id) ON DELETE CASCADE,
  rev_text_id       BIGINT, -- FK
  rev_comment       VARCHAR(1024),
  rev_user          BIGINT NOT NULL DEFAULT 0,
  --  REFERENCES user(user_id) ON DELETE RESTRICT,
  rev_user_text     VARCHAR(255) NOT NULL,
  rev_timestamp     TIMESTAMP(3) NOT NULL,
  rev_minor_edit    SMALLINT NOT NULL DEFAULT 0,
  rev_deleted       SMALLINT NOT NULL DEFAULT 0,
  rev_len           BIGINT,
  rev_parent_id     BIGINT DEFAULT NULL,
  rev_sha1          VARCHAR(255) NOT NULL DEFAULT ''
);
CREATE UNIQUE INDEX revision_unique
  ON revision (rev_page, rev_id);
CREATE INDEX rev_text_id_idx
  ON revision (rev_text_id);
CREATE INDEX rev_timestamp_idx
  ON revision (rev_timestamp);
CREATE INDEX rev_user_idx
  ON revision (rev_user);
CREATE INDEX rev_user_text_idx
  ON revision (rev_user_text);



CREATE TABLE text ( -- replaces reserved word 'text'
  old_id     INTEGER
    PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY (START WITH 1),
  old_text   CLOB(16M) INLINE LENGTH 4096,
  old_flags  VARCHAR(1024)
);



CREATE TABLE page_restrictions (
  pr_id      BIGINT
    PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY (START WITH 1),
  pr_page    INTEGER NOT NULL DEFAULT 0,
  --(used to be nullable)
  --  REFERENCES page (page_id) ON DELETE CASCADE,
  pr_type    VARCHAR(60) NOT NULL,
  pr_level   VARCHAR(60) NOT NULL,
  pr_cascade SMALLINT NOT NULL,
  pr_user    INTEGER,
  pr_expiry  TIMESTAMP(3)
  --PRIMARY KEY (pr_page, pr_type)
);
--ALTER TABLE page_restrictions ADD CONSTRAINT page_restrictions_pk PRIMARY KEY (pr_page, pr_type);
CREATE UNIQUE INDEX pr_pagetype
  ON page_restrictions (pr_page, pr_type);
CREATE INDEX pr_typelevel
  ON page_restrictions (pr_type, pr_level);
CREATE INDEX pr_level
  ON page_restrictions (pr_level);
CREATE INDEX pr_cascade
  ON page_restrictions (pr_cascade);



CREATE TABLE page_props (
  pp_page      INTEGER NOT NULL DEFAULT 0,
  -- REFERENCES page (page_id) ON DELETE CASCADE,
  pp_propname  VARCHAR(255) NOT NULL,
  pp_value     CLOB(64K) INLINE LENGTH 4096 NOT NULL,
  PRIMARY KEY (pp_page, pp_propname) 
);
CREATE INDEX page_props_propname
  ON page_props (pp_propname);



CREATE TABLE archive (
  ar_namespace   SMALLINT NOT NULL,
  ar_title       VARCHAR(255) NOT NULL,
  ar_text        CLOB(16M) INLINE LENGTH 4096,
  ar_comment     VARCHAR(1024),
  ar_user        BIGINT NOT NULL,
  -- no foreign keys in MySQL
  -- REFERENCES user(user_id) ON DELETE SET NULL,
  ar_user_text   VARCHAR(255) NOT NULL,
  ar_timestamp   TIMESTAMP(3) NOT NULL,
  ar_minor_edit  SMALLINT NOT NULL DEFAULT 0,
  ar_flags       VARCHAR(1024),
  ar_rev_id      INTEGER,
  ar_text_id     INTEGER,
  ar_deleted     SMALLINT NOT NULL DEFAULT 0,
  ar_len         INTEGER,
  ar_page_id     INTEGER,
  ar_parent_id   INTEGER,
  ar_sha1        VARCHAR(255) NOT NULL DEFAULT ''
);
CREATE INDEX archive_name_title_timestamp
  ON archive (ar_namespace, ar_title, ar_timestamp);
CREATE INDEX archive_user_text
  ON archive (ar_user_text);



CREATE TABLE redirect (
  rd_from       BIGINT NOT NULL
    PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY (START WITH 1),
  --REFERENCES page(page_id) ON DELETE CASCADE,
  rd_namespace  SMALLINT NOT NULL DEFAULT 0,
  rd_title      VARCHAR(255) NOT NULL DEFAULT '',
  rd_interwiki  VARCHAR(32),
  rd_fragment   VARCHAR(255)
);
CREATE INDEX redirect_ns_title
  ON redirect (rd_namespace, rd_title, rd_from);


CREATE TABLE pagelinks (
  pl_from       BIGINT NOT NULL DEFAULT 0,
  -- REFERENCES page(page_id) ON DELETE CASCADE,
  pl_namespace  SMALLINT NOT NULL,
  pl_title      VARCHAR(255) NOT NULL
);
CREATE UNIQUE INDEX pagelink_unique 
  ON pagelinks (pl_from, pl_namespace, pl_title);



CREATE TABLE templatelinks (
  tl_from       BIGINT NOT NULL DEFAULT 0,
  --  REFERENCES page(page_id) ON DELETE CASCADE,
  tl_namespace  SMALLINT NOT NULL,
  tl_title      VARCHAR(255) NOT NULL
);
CREATE UNIQUE INDEX templatelinks_unique
  ON templatelinks (tl_namespace, tl_title, tl_from);
CREATE UNIQUE INDEX tl_from_idx
  ON templatelinks (tl_from, tl_namespace, tl_title);



CREATE TABLE imagelinks (
  il_from  BIGINT NOT NULL DEFAULT 0,
  -- REFERENCES page(page_id) ON DELETE CASCADE,
  il_to    VARCHAR(255) NOT NULL
);
CREATE UNIQUE INDEX il_from_idx
  ON imagelinks (il_to, il_from);
CREATE UNIQUE INDEX il_to_idx
  ON imagelinks (il_from, il_to);



CREATE TABLE categorylinks (
  cl_from           BIGINT NOT NULL DEFAULT 0,
  -- REFERENCES page(page_id) ON DELETE CASCADE,
  cl_to             VARCHAR(255) NOT NULL,
  -- cl_sortkey has to be at least 86 wide 
  -- in order to be compatible with the old MySQL schema from MW 1.10
  --cl_sortkey    VARCHAR(86),
  cl_sortkey        VARCHAR(230) FOR BIT DATA NOT NULL,
  cl_sortkey_prefix VARCHAR(255) FOR BIT DATA NOT NULL,
  cl_timestamp      TIMESTAMP(3) NOT NULL,
  cl_collation      VARCHAR(32) FOR BIT DATA NOT NULL,
  cl_type           VARCHAR(6) FOR BIT DATA NOT NULL
);
CREATE UNIQUE INDEX cl_from
  ON categorylinks (cl_from, cl_to);
CREATE INDEX cl_sortkey
  ON categorylinks (cl_to, cl_sortkey, cl_from);



CREATE TABLE externallinks (
  el_from   BIGINT NOT NULL DEFAULT 0,
  -- REFERENCES page(page_id) ON DELETE CASCADE,
  el_to     VARCHAR(1024) NOT NULL,
  el_index  VARCHAR(1024) NOT NULL
);
CREATE INDEX externallinks_from_to
  ON externallinks (el_from, el_to);
CREATE INDEX externallinks_index
  ON externallinks (el_index);



--
-- Track external user accounts, if ExternalAuth is used
--
CREATE TABLE external_user (
  -- Foreign key to user_id
  eu_local_id      BIGINT NOT NULL
    PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY (START WITH 1),

  -- Some opaque identifier provided by the external database
  eu_external_id    VARCHAR(255) NOT NULL
);
CREATE UNIQUE INDEX eu_external_id_idx
  ON external_user (eu_external_id)
  INCLUDE (eu_local_id);
CREATE UNIQUE INDEX eu_local_id_idx
  ON external_user (eu_local_id)
  INCLUDE (eu_external_id);



CREATE TABLE langlinks (
  ll_from    BIGINT NOT NULL DEFAULT 0,
  -- REFERENCES page (page_id) ON DELETE CASCADE,
  ll_lang    VARCHAR(20),
  ll_title   VARCHAR(255)
);
CREATE UNIQUE INDEX langlinks_unique
  ON langlinks (ll_from, ll_lang);
CREATE INDEX langlinks_lang_title
  ON langlinks (ll_lang, ll_title);



CREATE TABLE site_stats (
  ss_row_id         BIGINT NOT NULL UNIQUE,
  ss_total_views    BIGINT DEFAULT 0,
  ss_total_edits    BIGINT DEFAULT 0,
  ss_good_articles  BIGINT DEFAULT 0,
  ss_total_pages    INTEGER DEFAULT -1,
  ss_users          INTEGER DEFAULT -1,
  ss_active_users   INTEGER DEFAULT -1,
  ss_admins         INTEGER DEFAULT -1,
  ss_images         INTEGER DEFAULT 0
);



CREATE TABLE hitcounter (
  hc_id  BIGINT NOT NULL
);



CREATE TABLE ipblocks (
  ipb_id                INTEGER NOT NULL
    PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY (START WITH 1),
  ipb_address           VARCHAR(1024),
  ipb_user              BIGINT NOT NULL DEFAULT 0,
  --           REFERENCES user(user_id) ON DELETE SET NULL,
  ipb_by                BIGINT NOT NULL DEFAULT 0,
  --  REFERENCES user(user_id) ON DELETE CASCADE,
  ipb_by_text           VARCHAR(255) NOT NULL DEFAULT '',
  ipb_reason            VARCHAR(1024) NOT NULL,
  ipb_timestamp         TIMESTAMP(3) NOT NULL,
  ipb_auto              SMALLINT NOT NULL DEFAULT 0,
  ipb_anon_only         SMALLINT NOT NULL DEFAULT 0,
  ipb_create_account    SMALLINT NOT NULL DEFAULT 1,
  ipb_enable_autoblock  SMALLINT NOT NULL DEFAULT 1,
  ipb_expiry            TIMESTAMP(3) NOT NULL,
  ipb_range_start       VARCHAR(1024),
  ipb_range_end         VARCHAR(1024),
  ipb_deleted           SMALLINT NOT NULL DEFAULT 0,
  ipb_block_email       SMALLINT NOT NULL DEFAULT 0,
  ipb_allow_usertalk    SMALLINT NOT NULL DEFAULT 0,
  ipb_parent_block_id             INTEGER DEFAULT NULL
  -- REFERENCES ipblocks(ipb_id) ON DELETE SET NULL

);
CREATE INDEX ipb_address
  ON ipblocks (ipb_address);
CREATE INDEX ipb_user 
  ON ipblocks (ipb_user);
CREATE INDEX ipb_range
  ON ipblocks (ipb_range_start, ipb_range_end);



CREATE TABLE image (
  img_name         VARCHAR(255) NOT NULL
    PRIMARY KEY,
  img_size         BIGINT NOT NULL,
  img_width        INTEGER NOT NULL,
  img_height       INTEGER NOT NULL,
  img_metadata     CLOB(16M) INLINE LENGTH 4096 NOT NULL DEFAULT '',
  img_bits         SMALLINT,
  img_media_type   VARCHAR(255),
  img_major_mime   VARCHAR(255) DEFAULT 'unknown',
  img_minor_mime   VARCHAR(32) DEFAULT 'unknown',
  img_description  VARCHAR(1024) NOT NULL DEFAULT '',
  img_user         BIGINT NOT NULL DEFAULT 0,
  --         REFERENCES user(user_id) ON DELETE SET NULL,
  img_user_text    VARCHAR(255) NOT NULL DEFAULT '',
  img_timestamp    TIMESTAMP(3),
  img_sha1         VARCHAR(255) NOT NULL DEFAULT ''
);
CREATE INDEX img_size_idx
  ON image (img_size);
CREATE INDEX img_timestamp_idx
  ON image (img_timestamp);
CREATE INDEX img_sha1
  ON image (img_sha1);


CREATE TABLE oldimage (
  oi_name          VARCHAR(255) NOT NULL DEFAULT '',
  oi_archive_name  VARCHAR(255) NOT NULL,
  oi_size          BIGINT NOT NULL,
  oi_width         INTEGER NOT NULL,
  oi_height        INTEGER NOT NULL,
  oi_bits          SMALLINT NOT NULL,
  oi_description   VARCHAR(1024),
  oi_user          BIGINT NOT NULL DEFAULT 0,
  --            REFERENCES user(user_id) ON DELETE SET NULL,
  oi_user_text     VARCHAR(255) NOT NULL,
  oi_timestamp     TIMESTAMP(3) NOT NULL,
  oi_metadata      CLOB(16M) INLINE LENGTH 4096 NOT NULL DEFAULT '',
  oi_media_type    VARCHAR(255),
  oi_major_mime    VARCHAR(255) NOT NULL DEFAULT 'unknown',
  oi_minor_mime    VARCHAR(255) NOT NULL DEFAULT 'unknown',
  oi_deleted       SMALLINT NOT NULL DEFAULT 0,
  oi_sha1          VARCHAR(255) NOT NULL DEFAULT ''
  --FOREIGN KEY (oi_name) REFERENCES image(img_name) ON DELETE CASCADE
);
CREATE INDEX oi_name_timestamp
  ON oldimage (oi_name, oi_timestamp);
CREATE INDEX oi_name_archive_name
  ON oldimage (oi_name, oi_archive_name);
CREATE INDEX oi_sha1
  ON oldimage (oi_sha1);



CREATE TABLE filearchive (
  fa_id                 INTEGER NOT NULL
    PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY (START WITH 1),
  fa_name               VARCHAR(255) NOT NULL,
  fa_archive_name       VARCHAR(255),
  fa_storage_group      VARCHAR(255),
  fa_storage_key        VARCHAR(64) DEFAULT '',
  fa_deleted_user       BIGINT NOT NULL DEFAULT 0,
  --            REFERENCES user(user_id) ON DELETE SET NULL,
  fa_deleted_timestamp  TIMESTAMP(3) NOT NULL,
  fa_deleted_reason     VARCHAR(255),
  fa_size               BIGINT NOT NULL,
  fa_width              INTEGER NOT NULL,
  fa_height             INTEGER NOT NULL,
  fa_metadata           CLOB(16M) INLINE LENGTH 4096 NOT NULL DEFAULT '',
  fa_bits               SMALLINT,
  fa_media_type         VARCHAR(255),
  fa_major_mime         VARCHAR(255) DEFAULT 'unknown',
  fa_minor_mime         VARCHAR(255) DEFAULT 'unknown',
  fa_description        VARCHAR(1024) NOT NULL,
  fa_user               BIGINT NOT NULL DEFAULT 0,
  --            REFERENCES user(user_id) ON DELETE SET NULL,
  fa_user_text          VARCHAR(255) NOT NULL,
  fa_timestamp          TIMESTAMP(3),
  fa_deleted            SMALLINT NOT NULL DEFAULT 0
);
CREATE INDEX fa_name_time
  ON filearchive (fa_name, fa_timestamp);
CREATE INDEX fa_dupe
  ON filearchive (fa_storage_group, fa_storage_key);
CREATE INDEX fa_notime
  ON filearchive (fa_deleted_timestamp);
CREATE INDEX fa_nouser
  ON filearchive (fa_deleted_user);



CREATE TABLE recentchanges (
  rc_id              INTEGER NOT NULL
    PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY (START WITH 1),
  rc_timestamp       TIMESTAMP(3) NOT NULL,
  rc_cur_time        TIMESTAMP(3) NOT NULL,
  rc_user            BIGINT NOT NULL DEFAULT 0,
  --        REFERENCES user(user_id) ON DELETE SET NULL,
  rc_user_text       VARCHAR(255) NOT NULL,
  rc_namespace       SMALLINT NOT NULL,
  rc_title           VARCHAR(255) NOT NULL,
  rc_comment         VARCHAR(255),
  rc_minor           SMALLINT NOT NULL DEFAULT 0,
  rc_bot             SMALLINT NOT NULL DEFAULT 0,
  rc_new             SMALLINT NOT NULL DEFAULT 0,
  rc_cur_id          BIGINT NOT NULL DEFAULT 0,
  --            REFERENCES page(page_id) ON DELETE SET NULL,
  rc_this_oldid      BIGINT NOT NULL,
  rc_last_oldid      BIGINT NOT NULL,
  rc_type            SMALLINT NOT NULL DEFAULT 0,
  rc_moved_to_ns     SMALLINT,
  rc_moved_to_title  VARCHAR(255),
  rc_patrolled       SMALLINT NOT NULL DEFAULT 0,
  rc_ip              VARCHAR(40),  -- was CIDR type
  rc_old_len         INTEGER,
  rc_new_len         INTEGER,
  rc_deleted         SMALLINT NOT NULL DEFAULT 0,
  rc_logid           BIGINT NOT NULL DEFAULT 0,
  rc_log_type        VARCHAR(255),
  rc_log_action      VARCHAR(255),
  rc_params          CLOB(64K) INLINE LENGTH 4096
  
);
CREATE INDEX rc_timestamp
  ON recentchanges (rc_timestamp);
CREATE INDEX rc_namespace_title
  ON recentchanges (rc_namespace, rc_title);
CREATE INDEX rc_cur_id
  ON recentchanges (rc_cur_id);
CREATE INDEX new_name_timestamp
  ON recentchanges (rc_new, rc_namespace, rc_timestamp);
CREATE INDEX rc_ip
  ON recentchanges (rc_ip);



CREATE TABLE watchlist (
  wl_user                   BIGINT NOT NULL DEFAULT 0,
  --  REFERENCES user(user_id) ON DELETE CASCADE,
  wl_namespace              SMALLINT NOT NULL DEFAULT 0,
  wl_title                  VARCHAR(255) NOT NULL,
  wl_notificationtimestamp  TIMESTAMP(3)
);
CREATE UNIQUE INDEX wl_user_namespace_title
  ON watchlist (wl_namespace, wl_title, wl_user);



CREATE TABLE interwiki (
  iw_prefix  VARCHAR(32) NOT NULL UNIQUE,
  iw_url     CLOB(64K) INLINE LENGTH 4096 NOT NULL,
  iw_api     CLOB(64K) INLINE LENGTH 4096 NOT NULL,
  iw_wikiid  VARCHAR(64) NOT NULL,
  iw_local   SMALLINT NOT NULL,
  iw_trans   SMALLINT NOT NULL DEFAULT 0
);



CREATE TABLE querycache (
  qc_type       VARCHAR(255) NOT NULL,
  qc_value      BIGINT NOT NULL,
  qc_namespace  INTEGER NOT NULL,
  qc_title      VARCHAR(255) NOT NULL
);
CREATE INDEX querycache_type_value
  ON querycache (qc_type, qc_value);



CREATE TABLE querycache_info (
  qci_type        VARCHAR(255) UNIQUE NOT NULL,
  qci_timestamp   TIMESTAMP(3)
);



CREATE TABLE querycachetwo (
  qcc_type          VARCHAR(255) NOT NULL,
  qcc_value         BIGINT NOT NULL DEFAULT 0,
  qcc_namespace     INTEGER NOT NULL DEFAULT 0,
  qcc_title         VARCHAR(255) NOT NULL DEFAULT '',
  qcc_namespacetwo  INTEGER NOT NULL DEFAULT 0,
  qcc_titletwo      VARCHAR(255) NOT NULL DEFAULT ''
);
CREATE INDEX querycachetwo_type_value
  ON querycachetwo (qcc_type, qcc_value);
CREATE INDEX querycachetwo_title
  ON querycachetwo (qcc_type, qcc_namespace, qcc_title);
CREATE INDEX querycachetwo_titletwo
  ON querycachetwo (qcc_type, qcc_namespacetwo, qcc_titletwo);



CREATE TABLE objectcache (
  keyname   VARCHAR(255) NOT NULL UNIQUE, -- was nullable
  value     CLOB(16M) INLINE LENGTH 4096 NOT NULL DEFAULT '',
  exptime   TIMESTAMP(3) NOT NULL
);
CREATE INDEX objectcacache_exptime
  ON objectcache (exptime);



CREATE TABLE transcache (
  tc_url       VARCHAR(255) NOT NULL UNIQUE,
  tc_contents  CLOB(64K) INLINE LENGTH 4096 NOT NULL,
  tc_time      TIMESTAMP(3) NOT NULL
);



CREATE TABLE logging (
  log_id          BIGINT NOT NULL
    PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY (START WITH 1),
  log_type        VARCHAR(32) NOT NULL,
  log_action      VARCHAR(32) NOT NULL,
  log_timestamp   TIMESTAMP(3) NOT NULL,
  log_user        BIGINT NOT NULL DEFAULT 0,
  --                REFERENCES user(user_id) ON DELETE SET NULL,
  -- Name of the user who performed this action
  log_user_text   VARCHAR(255) NOT NULL DEFAULT '',
  log_namespace   SMALLINT NOT NULL,
  log_title       VARCHAR(255) NOT NULL,
  log_page        BIGINT,
  log_comment     VARCHAR(255),
  log_params      CLOB(64K) INLINE LENGTH 4096,
  log_deleted     SMALLINT NOT NULL DEFAULT 0
);
CREATE INDEX logging_type_name
  ON logging (log_type, log_timestamp);
CREATE INDEX logging_user_time
  ON logging (log_timestamp, log_user);
CREATE INDEX logging_page_time
  ON logging (log_namespace, log_title, log_timestamp);
CREATE INDEX log_user_type_time
  ON logging (log_user, log_type, log_timestamp);
CREATE INDEX log_page_id_time
  ON logging (log_page, log_timestamp);
CREATE UNIQUE INDEX type_action
  ON logging (log_type, log_action, log_timestamp);



CREATE TABLE trackbacks (
  tb_id     INTEGER NOT NULL
    PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY (START WITH 1),
  -- foreign key also in MySQL
  tb_page   INTEGER,
  -- REFERENCES page(page_id) ON DELETE CASCADE,
  tb_title  VARCHAR(255) NOT NULL,
  tb_url    CLOB(64K) INLINE LENGTH 4096 NOT NULL,
  tb_ex     CLOB(64K) INLINE LENGTH 4096,
  tb_name   VARCHAR(255)
);
CREATE INDEX trackback_page
  ON trackbacks (tb_page);



CREATE TABLE job (
  job_id         BIGINT NOT NULL
    PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY (START WITH 1),
  job_cmd        VARCHAR(255) NOT NULL,
  job_namespace  SMALLINT NOT NULL,
  job_title      VARCHAR(255) NOT NULL,
  job_params     CLOB(64K) INLINE LENGTH 4096 NOT NULL
);
CREATE INDEX job_cmd_namespace_title
  ON job (job_cmd, job_namespace, job_title);



--TODO
--CREATE FUNCTION add_interwiki (TEXT, INT, SMALLINT) RETURNS INT LANGUAGE SQL AS
--$mw$
--  INSERT INTO interwiki (iw_prefix, iw_url, iw_local) VALUES ($1,$2,$3);
--  SELECT 1;
--$mw$;



-- hack implementation
-- should be replaced with OmniFind, Contains(), etc
CREATE TABLE searchindex (
  si_page   BIGINT NOT NULL,
  si_title  VARCHAR(255) NOT NULL DEFAULT '',
  si_text   CLOB NOT NULL
);



-- This table is not used unless profiling is turned on
CREATE TABLE profiling (
  pf_count   INTEGER NOT NULL DEFAULT 0,
  pf_time    NUMERIC(18,10) NOT NULL DEFAULT 0,
  pf_memory  NUMERIC(18,10) NOT NULL DEFAULT 0,
  pf_name    VARCHAR(255) NOT NULL,
  pf_server  VARCHAR(255)
);
CREATE UNIQUE INDEX pf_name_server
  ON profiling (pf_name, pf_server);



CREATE TABLE protected_titles (
  pt_namespace   INTEGER NOT NULL,
  pt_title       VARCHAR(255) NOT NULL,
  pt_user        BIGINT NOT NULL DEFAULT 0,
  --       REFERENCES user(user_id) ON DELETE SET NULL,
  pt_reason      VARCHAR(1024),
  pt_timestamp   TIMESTAMP(3) NOT NULL,
  pt_expiry      TIMESTAMP(3),
  pt_create_perm VARCHAR(60) NOT NULL DEFAULT ''
);
CREATE UNIQUE INDEX protected_titles_unique
  ON protected_titles (pt_namespace, pt_title);



CREATE TABLE updatelog (
  ul_key VARCHAR(255) NOT NULL
    PRIMARY KEY
);



CREATE TABLE category (
  cat_id       INTEGER NOT NULL
    PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY (START WITH 1),
  cat_title    VARCHAR(255) NOT NULL,
  cat_pages    INTEGER NOT NULL DEFAULT 0,
  cat_subcats  INTEGER NOT NULL DEFAULT 0,
  cat_files    INTEGER NOT NULL DEFAULT 0,
  cat_hidden   SMALLINT NOT NULL DEFAULT 0
);
CREATE UNIQUE INDEX category_title
  ON category (cat_title);
CREATE INDEX category_pages
  ON category (cat_pages);



-- A table to track tags for revisions, logs and recent changes.
CREATE TABLE change_tag (
  ct_rc_id    INTEGER,
  ct_log_id   INTEGER,
  ct_rev_id   INTEGER,
  ct_tag      VARCHAR(255) NOT NULL,
  ct_params   CLOB(64K) INLINE LENGTH 4096
);
CREATE UNIQUE INDEX change_tag_rc_tag
  ON change_tag (ct_rc_id, ct_tag);
CREATE UNIQUE INDEX change_tag_log_tag
  ON change_tag (ct_log_id, ct_tag);
CREATE UNIQUE INDEX change_tag_rev_tag
  ON change_tag (ct_rev_id, ct_tag);
-- Covering index, so we can pull all the info only out of the index.
CREATE INDEX change_tag_tag_id
  ON change_tag (ct_tag, ct_rc_id, ct_rev_id, ct_log_id);



-- Rollup table to pull a LIST of tags simply
CREATE TABLE tag_summary (
  ts_rc_id  INTEGER,
  ts_log_id INTEGER,
  ts_rev_id INTEGER,
  ts_tags   CLOB(64K) INLINE LENGTH 4096 NOT NULL
);
CREATE UNIQUE INDEX tag_summary_rc_id
  ON tag_summary (ts_rc_id);
CREATE UNIQUE INDEX tag_summary_log_id
  ON tag_summary (ts_log_id);
CREATE UNIQUE INDEX tag_summary_rev_id
  ON tag_summary (ts_rev_id);



CREATE TABLE valid_tag (
  vt_tag VARCHAR(255) NOT NULL
    PRIMARY KEY
);



--
-- User preferences and perhaps other fun stuff. :)
-- Replaces the old user.user_options blob, with a couple nice properties:
--
-- 1) We only store non-default settings, so changes to the DEFAULTs
--    are now reflected for everybody, not just new accounts.
-- 2) We can more easily do bulk lookups, statistics, or modifications of
--    saved options since it's a sane table structure.
--
CREATE TABLE user_properties (
  -- Foreign key to user.user_id
  up_user       BIGINT NOT NULL,
  -- Name of the option being saved. This is indexed for bulk lookup.
  up_property   VARCHAR(255) FOR BIT DATA NOT NULL,
  -- Property value as a string.
  up_value      CLOB(64K) INLINE LENGTH 4096
);
CREATE UNIQUE INDEX user_properties_user_property
  ON user_properties (up_user, up_property);
CREATE INDEX user_properties_property
  ON user_properties (up_property);

CREATE TABLE log_search (
  -- The type of ID (rev ID, log ID, rev TIMESTAMP(3), username)
  ls_field    VARCHAR(32) FOR BIT DATA NOT NULL,
  -- The value of the ID
  ls_value    VARCHAR(255) NOT NULL,
  -- Key to log_id
  ls_log_id   BIGINT NOT NULL DEFAULT 0
);
CREATE UNIQUE INDEX ls_field_val
  ON log_search (ls_field, ls_value, ls_log_id);
CREATE INDEX ls_log_id
  ON log_search (ls_log_id);



-- Table for storing localisation data
CREATE TABLE l10n_cache (
  -- Language code
  lc_lang       VARCHAR(32) NOT NULL,
  -- Cache key
  lc_key        VARCHAR(255) NOT NULL,
  -- Value
  lc_value      CLOB(16M) INLINE LENGTH 4096 NOT NULL
);
CREATE INDEX lc_lang_key
  ON l10n_cache (lc_lang, lc_key);



CREATE TABLE msg_resource_links
(
  mrl_resource  VARCHAR(255) FOR BIT DATA NOT NULL,
  mrl_message   VARCHAR(255) FOR BIT DATA NOT NULL
);
CREATE UNIQUE INDEX uq61_msg_resource_links
  ON msg_resource_links (mrl_message, mrl_resource);
-- All DB2 indexes DEFAULT to allowing reverse scans



CREATE TABLE msg_resource
(
  mr_resource   VARCHAR(255) FOR BIT DATA NOT NULL,
  mr_lang       VARCHAR(32) FOR BIT DATA NOT NULL,
  mr_blob       CLOB(64K) INLINE LENGTH 4096 NOT NULL,
  mr_timestamp  TIMESTAMP(3) NOT NULL
);
CREATE UNIQUE INDEX uq81_msg_resource
  ON msg_resource (mr_resource, mr_lang);
-- All DB2 indexes DEFAULT to allowing reverse scans



CREATE TABLE module_deps (
  md_module VARCHAR(255) FOR BIT DATA NOT NULL,
  md_skin   VARCHAR(32) FOR BIT DATA NOT NULL,
  md_deps   CLOB(16M) INLINE LENGTH 4096 NOT NULL
);
CREATE UNIQUE INDEX uq96_module_deps
  ON module_deps (md_module, md_skin);
-- All DB2 indexes DEFAULT to allowing reverse scans



CREATE TABLE iwlinks
(
  iwl_from    INTEGER NOT NULL,
  iwl_prefix  VARCHAR(20) FOR BIT DATA NOT NULL,
  iwl_title   VARCHAR(255) FOR BIT DATA NOT NULL
);



--
-- Store information about newly uploaded files before they're 
-- moved into the actual filestore
--
CREATE TABLE uploadstash (
  us_id           BIGINT NOT NULL
    PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY (START WITH 1),
  -- the user who uploaded the file.
  us_user         BIGINT NOT NULL,
  -- file key. this is how applications actually search for the file.
  -- this might go away, or become the primary key.
  us_key          VARCHAR(255) NOT NULL,
  -- the original path
  us_orig_path    VARCHAR(255) NOT NULL,
  -- the temporary path at which the file is actually stored
  us_path         VARCHAR(255) NOT NULL,
  -- which type of upload the file came from (sometimes)
  us_source_type  VARCHAR(50),
  -- the date/time on which the file was added
  us_timestamp    TIMESTAMP(3) NOT NULL,
  us_status       VARCHAR(50) NOT NULL,
  -- file properties from File::getPropsFromPath.  these may prove unnecessary.
  --
  us_size         BIGINT NOT NULL,
  -- this hash comes from File::sha1Base36(), and is 31 characters
  us_sha1         VARCHAR(31) NOT NULL,
  us_mime         VARCHAR(255),
  -- Media type as defined by the MEDIATYPE_xxx constants, should duplicate definition in the image table
  us_media_type   VARCHAR(30)
    CONSTRAINT my_constraint
      CHECK (
        us_media_type in (
          'UNKNOWN', 'BITMAP', 'DRAWING', 'AUDIO', 'VIDEO', 'MULTIMEDIA',
          'OFFICE', 'TEXT', 'EXECUTABLE', 'ARCHIVE'
      )
    ) DEFAULT NULL,
  -- image-specific properties
  us_image_width  BIGINT,
  us_image_height BIGINT,
  us_image_bits   INTEGER
);
-- sometimes there's a delete for all of a user's stuff.
CREATE INDEX us_user
  ON uploadstash (us_user);
-- pick out files by key, enforce key UNIQUEness
CREATE UNIQUE INDEX us_key
  ON uploadstash (us_key);
-- the abandoned upload cleanup script needs this
CREATE INDEX us_timestamp
  ON uploadstash (us_timestamp);



-- Stores the groups the user has once belonged to. 
-- The user may still belong these groups. Check user_groups.
CREATE TABLE user_former_groups (
  ufg_user   BIGINT NOT NULL DEFAULT 0,
  ufg_group  VARCHAR(16) FOR BIT DATA NOT NULL
);
CREATE UNIQUE INDEX ufg_user_group
  ON user_former_groups (ufg_user, ufg_group);