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Database Structure Planned Changes.md
source: https://github.com/ankitects/anki/tree/2.1.44/rslib/src/storage/upgrades
Changes are being made to the Anki database structure. According to the mod.rs file in the above link, the minimum supported version (and the version that new collections are created with) is version 11. This number is found in the ver field of the col table. AnkiDroid uses version 11 of the database at the time of this writing. Desktop Anki
seems to perform upgrades to the database when opening it to improve performance, but then downgrades to allow compatibility with Anki clients still on version 11.
The schemaXX_upgrade.sql files indicate what each upgrade does. Here are explantions for each of those files:
Additional fields (db term, not Anki's fields) for the tags table.
New tables FIELDS, templates, notetypes, decks
New tables deck_config, config, and tags to replace the corresponding fields in the col table.
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config- Contains a protobuf encoded blob
I almost exclusively review on AnkiDroid and so I'm on db version 11 and can't confirm these:
- new tables have a field of
mtime_secs integer NOT NULLis this modified time in epoch seconds? Aka what the older tables have asmod? - similarly, there's a new field of
ntid integer NOT NULL,in some of the tables. Is this referring to the id of a note or the id of a note type?