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author | Eric Wong <e@80x24.org> | 2020-12-05 22:59:31 +0000 |
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committer | Eric Wong <e@80x24.org> | 2020-12-07 07:31:00 +0000 |
commit | a0c41f3d5e9b40bfbb066fa7f0e2e530818ccc0a (patch) | |
tree | eb81df04cd4b166167dd3375f599ee428ec512ae /lib/PublicInbox | |
parent | 4b551c884a648b45ec6b5465efd9fb67f85f0055 (diff) | |
download | public-inbox-a0c41f3d5e9b40bfbb066fa7f0e2e530818ccc0a.tar.gz |
INTEGER PRIMARY KEY can be an alias for ROWID in SQLite and is already unique, so there's no need for a separate UNIQUE(num) index. With a smallish ~3K, freshly indexed v2 inbox, this results in a ~40K space savings, reducing over.sqlite3 from 1.375M to 1.335M (post-VACUUM). This only affects newly-indexed inboxes; existing DBs will require manual intervention to take advantage of space savings. Link: https://www.sqlite.org/rowidtable.html
Diffstat (limited to 'lib/PublicInbox')
-rw-r--r-- | lib/PublicInbox/OverIdx.pm | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/lib/PublicInbox/OverIdx.pm b/lib/PublicInbox/OverIdx.pm index 88daa64f..635aa314 100644 --- a/lib/PublicInbox/OverIdx.pm +++ b/lib/PublicInbox/OverIdx.pm @@ -389,13 +389,12 @@ sub create_tables { $dbh->do(<<''); CREATE TABLE IF NOT EXISTS over ( - num INTEGER NOT NULL, /* NNTP article number == IMAP UID */ + num INTEGER PRIMARY KEY NOT NULL, /* NNTP article number == IMAP UID */ tid INTEGER NOT NULL, /* THREADID (IMAP REFERENCES threading, JMAP) */ sid INTEGER, /* Subject ID (IMAP ORDEREDSUBJECT "threading") */ ts INTEGER, /* IMAP INTERNALDATE (Received: header, git commit time) */ ds INTEGER, /* RFC-2822 sent Date: header, git author time */ - ddd VARBINARY, /* doc-data-deflated (->to_doc_data, ->load_from_data) */ - UNIQUE (num) + ddd VARBINARY /* doc-data-deflated (->to_doc_data, ->load_from_data) */ ) $dbh->do('CREATE INDEX IF NOT EXISTS idx_tid ON over (tid)'); |