text: -- 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
  
  );
  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_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);
  
  
  
  -- Table for holding configuration changes
  CREATE TABLE config (
    cf_name   VARCHAR(255) NOT NULL
      PRIMARY KEY,
    cf_value  CLOB(64K) INLINE LENGTH 4096 NOT NULL
  );
  
  