Database

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MythTV uses a MySQL relational database to manage almost all aspects of configuration and day-to-day operation. Mythfrontend, mythbackend, mythfilldatabase, MythTV plugins and ancillary programs all interact with the database and use it to store settings and information.

By default, the database is named mythconverg and contains a set of tables that interact with one-another. When running multiple frontends and/or backends, only one database is required.

Database tables

In 0.26 there are 103 tables in the database. The incomplete schema below gives some information about what each table is for and some of the key fields.

Information on the 0.27 database schema generated by Doxygen is available here on the MythTV code development site.

Table name Purpose Doxygen docs Fields Key relationship fields Other notable fields
archiveitems
callsignnetworkmap
capturecard Attributes of capture card [1] 26 cardid*,diseqid videodevice,audiodevice,cardtype
cardinput
channel [2] 28 channelid*, freqid, sourceid, xmltvid, mplexid, iptvid name, channelnum, icon, recpriority, contrast
channelgroup 3 id*, chanid, grpid
channelgroupnames 2 grpid*
channelscan 5 scanid*,cardid,sourceid processed, scandate
channelscan_channel 38 transportid,scanid,mplex_id,source_id,service_id, xmltvid freqid, service_name, chan_num
channelscan_dtv_multiplex
codecparams
credits
customexample
diseqc_config
diseqc_tree
displayprofilegroups
displayprofiles
dtv_multiplex Information needed to tune to a particular frequency on a particular input [3] 24 mplexid*,sourceid,transportid,networkid frequency, polarity, modulation
dtv_privatetypes Free form data pertaining to DVB services, it is like a settings table for DVB. [4] 4 networkid sitype,private_type,private_value
dvdbookmark
dvdinput
dvdtranscode
eit_cache
filemarkup
gallerymetadata
gamemetadata
gameplayers
housekeeping
inputgroup
internetcontent
internetcontentarticles
inuseprograms
iptv_channel
jobqueue
jumppoints
keybindings
keyword
livestream
logging
music_albumart
music_albums
music_artists
music_directories
music_genres
music_playlists
music_smartplaylists
music_smartplaylist_categories
music_smartplaylist_items
music_songs
music_stats
mythlog
networkiconmap
newssites
oldfind [5]
oldprogram
oldrecorded [6]
people
pidcache
playgroup
powerpriority
profilegroups
program [7]
programgenres
programrating
recgrouppassword
record
recorded [8]
recordedartwork
recordedcredits
recordedfile
recordedmarkup
recordedprogram
recordedrating
recordedseek
recordfilter
recordingprofiles
recordmatch
romdb
scannerfile
scannerpath
schemalock
settings
storagegroup
tvchain
tvosdmenu
upnpmedia
videocast
videocategory
videocollection
videocountry
videogenre
videometadata
videometadatacast
videometadatacountry
videometadatagenre
videopart
videopathinfo
videosource This table tells us about a particular input on a video capture card. [9]
videotypes
weatherdatalayout
weatherscreens
weathersourcesettings
websites

Command line interface

Use the mysql command on the host running the database:

% mysql -u mythtv -pmythtv mythconverg

SQL commands can be issued at the mysql> prompt.

Graphical interface

Try installing phpMyAdmin, which can administrate MySQL databases via a browser.