Storage

Topic Areas

• Entity Storage
• Entity ID Counters
• Property Info
• Item Sitelinks
• Item & Property Terms
• Item & Property Terms Caching

SQL Tables

Repo

• Change propagation
  • wb_changes
  • wb_changes_subscription
• Entity ID Counters
  • wb_id_counters
• Item Sitelinks
  • wb_items_per_site
• Property Info
  • wb_property_info
• Item & Property Terms
  • wbt_item_terms
  • wbt_property_terms
  • wbt_term_in_lang
  • wbt_text_in_lang
  • wbt_type
  • wbt_text

Client

• Change propagation
  • wbc_entity_usage (See also Usage tracking)

Existing table changes

The following changes are done to the default MediaWiki tables:

• content_models
  • Repo: Add new content models
    • wikibase-item
    • wikibase-property
• page_props
  • Repo: Add some counters:
    • wb-claims
    • wb-identifiers
    • wb-sitelinks
  • Client:
    • wb_item
• ...