Difference between revisions of "Schema.doc (MediaWiki)"
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{{mediawiki dev doc|Schema.doc}} | {{mediawiki dev doc|Schema.doc}} | ||
| − | ==Contents== The most up-to-date schema for the tables in the database | + | ==Contents== |
| − | should always be "tables.sql" in the maintenance directory, which is | + | The most up-to-date schema for the tables in the database should always be "tables.sql" in the maintenance directory, which is called from the installation script. Here are a few highlights that may be out of date: |
| − | called from the installation script. Here are a few highlights that may | + | ===user=== |
| − | be out of date: ===user=== | ||
Wikipedia users | Wikipedia users | ||
*'''user_id''' | *'''user_id''' | ||
*:integer, primary key, autoincrement | *:integer, primary key, autoincrement | ||
*'''user_name''' | *'''user_name''' | ||
| − | *:Usernames must be unique, must not be in the form of an IP address. _Shouldn't_ allow slashes or case conflicts. Spaces are allowed, and | + | *:Usernames must be unique, must not be in the form of an IP address. _Shouldn't_ allow slashes or case conflicts. Spaces are allowed, and are _not_ converted to underscores like titles. (Conflicts?) |
| − | are _not_ converted to underscores like titles. (Conflicts?) | ||
*'''user_password''' | *'''user_password''' | ||
*:Hash of current password. | *:Hash of current password. | ||
| Line 15: | Line 13: | ||
*:Generated for mail-a-new-password feature | *:Generated for mail-a-new-password feature | ||
*'''user_email''' | *'''user_email''' | ||
| − | *:Note -- email should be restricted, not public info. Same with | + | *:Note -- email should be restricted, not public info. Same with passwords. ;) |
| − | passwords. ;) | ||
*'''user_options''' | *'''user_options''' | ||
*:Newline-separated list of name=value pairs. | *:Newline-separated list of name=value pairs. | ||
*'''user_token''' | *'''user_token''' | ||
| − | *:A pseudorandomly generated value that is stored in a cookie when the | + | *:A pseudorandomly generated value that is stored in a cookie when the "remember password" feature is used (previously, a hash of the password was used, but this was vulnerable to cookie-stealing attacks) |
| − | "remember password" feature is used (previously, a hash of the password | ||
| − | was used, but this was vulnerable to cookie-stealing attacks) | ||
===cur=== | ===cur=== | ||
Wikipedia "current" articles | Wikipedia "current" articles | ||
| Line 28: | Line 23: | ||
*:integer, primary key, autoincrement | *:integer, primary key, autoincrement | ||
*'''cur_namespace''' | *'''cur_namespace''' | ||
| − | *:integer index into list of namespaces. See the Namespace class for | + | *:integer index into list of namespaces. See the Namespace class for more details. |
| − | more details. | ||
*'''cur_title''' | *'''cur_title''' | ||
| − | *:Title of article (in dbkey form--see Title), without namespace. The | + | *:Title of article (in dbkey form--see Title), without namespace. The combination of namespace,title should be unique in this table. |
| − | combination of namespace,title should be unique in this table. | ||
*'''cur_text''' | *'''cur_text''' | ||
*:Wikitext of the article. | *:Wikitext of the article. | ||
| Line 166: | Line 159: | ||
*:Creation (or refresh) date in standard YMDHMS form. IP blocks expire automatically. | *:Creation (or refresh) date in standard YMDHMS form. IP blocks expire automatically. | ||
*'''ipb_auto''' | *'''ipb_auto''' | ||
| − | *:Indicates that the IP address was banned because a banned user | + | *:Indicates that the IP address was banned because a banned user accessed a page through it. If this is 1, ipb_address will be hidden. |
| − | accessed a page through it. If this is 1, ipb_address will be hidden. | ||
===site_stats=== | ===site_stats=== | ||
Site-wide statistics | Site-wide statistics | ||
*'''ss_row_id''' | *'''ss_row_id''' | ||
| − | *:Token for where clauses. There's only one row in this table. At some | + | *:Token for where clauses. There's only one row in this table. At some point we might want to use a date here so we can get stats-by-date. |
| − | point we might want to use a date here so we can get stats-by-date. | ||
*'''ss_total_views''' | *'''ss_total_views''' | ||
*:Number of total views of all pages. | *:Number of total views of all pages. | ||
| Line 180: | Line 171: | ||
*:Number of "countable" articles. | *:Number of "countable" articles. | ||
===hitcounter=== | ===hitcounter=== | ||
| − | Stores an ID for every time any article is visited; depending on | + | Stores an ID for every time any article is visited; depending on $wgHitcounterUpdateFreq, it is periodically cleared and the cur_counter column in the cur table updated for the all articles that have been visited. |
| − | $wgHitcounterUpdateFreq, it is periodically cleared and the cur_counter | ||
| − | column in the cur table updated for the all articles that have been | ||
| − | visited. | ||
*'''hc_id''' | *'''hc_id''' | ||
*:The ID of an article, representing one hit | *:The ID of an article, representing one hit | ||
| Line 193: | Line 181: | ||
*'''wl_namespace''' | *'''wl_namespace''' | ||
*:Namespace -> cur_namespace | *:Namespace -> cur_namespace | ||
| − | *:Note that these should only include even-numbered namespaces for | + | *:Note that these should only include even-numbered namespaces for regular pages; associated talk pages (odd numbered namespaces) are folded in. |
| − | regular pages; associated talk pages (odd numbered namespaces) are | ||
| − | folded in. | ||
*'''wl_title''' | *'''wl_title''' | ||
*:Page title -> cur_title | *:Page title -> cur_title | ||
| − | *:Note also that the linked page may not exist in page or talk | + | *:Note also that the linked page may not exist in page or talk namespace, or at all. |
| − | namespace, or at all. | ||
===searchindex=== | ===searchindex=== | ||
Used for MySQL fulltext searching | Used for MySQL fulltext searching | ||
| Line 215: | Line 200: | ||
*:The URL of the wiki, with "$1" as a placeholder for an article name | *:The URL of the wiki, with "$1" as a placeholder for an article name | ||
*'''iw_local''' | *'''iw_local''' | ||
| − | *:A boolean value indicating whether the wiki is in this project (used, | + | *:A boolean value indicating whether the wiki is in this project (used, for example, to detect redirect loops) |
| − | for example, to detect redirect loops) | + | |
==Edit Log== | ==Edit Log== | ||
*'''2005-06-13''' Transcribed from docs for MediaWiki version 1.4.5 | *'''2005-06-13''' Transcribed from docs for MediaWiki version 1.4.5 | ||
Latest revision as of 21:09, 7 December 2005
Contents
The most up-to-date schema for the tables in the database should always be "tables.sql" in the maintenance directory, which is called from the installation script. Here are a few highlights that may be out of date:
user
Wikipedia users
- user_id
- integer, primary key, autoincrement
- user_name
- Usernames must be unique, must not be in the form of an IP address. _Shouldn't_ allow slashes or case conflicts. Spaces are allowed, and are _not_ converted to underscores like titles. (Conflicts?)
- user_password
- Hash of current password.
- user_newpassword
- Generated for mail-a-new-password feature
- user_email
- Note -- email should be restricted, not public info. Same with passwords. ;)
- user_options
- Newline-separated list of name=value pairs.
- user_token
- A pseudorandomly generated value that is stored in a cookie when the "remember password" feature is used (previously, a hash of the password was used, but this was vulnerable to cookie-stealing attacks)
cur
Wikipedia "current" articles
- cur_id
- integer, primary key, autoincrement
- cur_namespace
- integer index into list of namespaces. See the Namespace class for more details.
- cur_title
- Title of article (in dbkey form--see Title), without namespace. The combination of namespace,title should be unique in this table.
- cur_text
- Wikitext of the article.
- cur_comment
- The summary of the last change.
- cur_user
- User id who made the last change, or 0 if unknown.
- cur_user_text
- Name of the user above, or IP address.
- cur_timestamp
- Time of the last change.
- cur_minor_edit
- Flag: 0 or 1 is last change was a "minor" edit.
- cur_restrictions
- Who may or may not edit the article.
- cur_counter
- Number of times this page has been viewed.
- cur_ind_title
- Text version of title for fulltext searches.
- cur_ind_text
- Plaintext version of text for fulltext searches.
- cur_is_redirect
- 1 indicates the article is a redirect.
- cur_minor_edit
- 1 indicates this was a minor edit.
- cur_is_new
- 1 indicates this is the first revision of a new entry.
- cur_random
- Random value between 0 and 1, used for Special:Randompage
old
Historical versions articles. Most fields correspond to the same fields in "cur"
- old_id
- old_namespace
- old_title
- old_text
- old_comment
- old_user
- old_user_text
- old_timestamp
- old_minor_edit
- old_flags
- This last is currently unused.
archive
Temporary storage of deleted articles which may be restored. Fields correspond to those of "cur" and "old"
- ar_namespace
- ar_title
- ar_text
- ar_comment
- ar_user
- ar_user_text
- ar_timestamp
- ar_minor_edit
- ar_flags
- This last is currently unused.
links
Internal links to existing articles
- l_from
- ID of source article. (currently title, may be changed)
- l_to
- ID of target article.
brokenlinks
Internal links to non-existent articles
- bl_from
- ID of source link.
- bl_to
- Title of target link.
imagelinks
Internal links to images via [[Image:filename]] syntax
- il_from
- Title of target article.
- il_to
- Filename of target image.
categorylinks
Track category inclusions
- cl_from
- corresponds to cur_id of the linking page
- cl_to
- corresponds to cur_title of the category page
- cl_sortkey
- the title of the linking page, or an optional override
- cl_timestampe
- when the link was last added
linkscc
Stores (possibly gzipped) serialized objects with cache arrays to reduce database load slurping up from links and brokenlinks.
- lcc_pageid
- The ID of the linking page
- lcc_cacheobj
- A serialized LinkCache object
image
Uploaded images and other files
- img_name
- Filename.
- img_size
- File size in bytes.
- img_description
- Description field given during upload.
- img_user
- User ID who uploaded the file.
- img_user_text
- User name who uploaded the file.
- img_timestamp
- Timestamp when upload took place.
oldimage
Old versions of images stored for potential revert
- oi_name
- Original filename.
- oi_archive_name
- Filename of stored old revision; timestamp and exclaimation point prepended to oi_name
- oi_size
- File size in bytes.
- oi_description
- Description field given during upload.
- oi_user
- User ID who uploaded the file.
- oi_user_text
- User name who uploaded the file.
- oi_timestamp
- Timestamp when upload took place.
ipblocks
IP addresses and users blocked from editing
- ipb_id
- Primary key, introduced for privacy.
- ipb_address
- Blocked IP address in dotted-quad form or user name.
- ipb_user
- Blocked user ID or 0 for IP blocks.
- ipb_by
- User ID who made the block.
- ipb_reason
- Text comment made by blocker.
- ipb_timestamp
- Creation (or refresh) date in standard YMDHMS form. IP blocks expire automatically.
- ipb_auto
- Indicates that the IP address was banned because a banned user accessed a page through it. If this is 1, ipb_address will be hidden.
site_stats
Site-wide statistics
- ss_row_id
- Token for where clauses. There's only one row in this table. At some point we might want to use a date here so we can get stats-by-date.
- ss_total_views
- Number of total views of all pages.
- ss_total_edits
- Number of total page edits.
- ss_good_articles
- Number of "countable" articles.
hitcounter
Stores an ID for every time any article is visited; depending on $wgHitcounterUpdateFreq, it is periodically cleared and the cur_counter column in the cur table updated for the all articles that have been visited.
- hc_id
- The ID of an article, representing one hit
recentchanges
Will document further when working
watchlist
- wl_user
- Foreign key -> user_id
- wl_namespace
- Namespace -> cur_namespace
- Note that these should only include even-numbered namespaces for regular pages; associated talk pages (odd numbered namespaces) are folded in.
- wl_title
- Page title -> cur_title
- Note also that the linked page may not exist in page or talk namespace, or at all.
searchindex
Used for MySQL fulltext searching
- si_page
- The ID of an article
- si_title
- The title of an article, indexed for searching
- si_text
- The text of an article, indexed for searching
interwiki
Recognized interwiki link prefixes
- iw_prefix
- The interwiki prefix, (e.g. "Meatball", or the language prefix "de")
- iw_url
- The URL of the wiki, with "$1" as a placeholder for an article name
- iw_local
- A boolean value indicating whether the wiki is in this project (used, for example, to detect redirect loops)
Edit Log
- 2005-06-13 Transcribed from docs for MediaWiki version 1.4.5