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CREATE TABLE package (id INTEGER PRIMARY KEY, name TEXT UNIQUE, version TEXT, architecture TEXT, source TEXT);
CREATE TABLE content (id INTEGER PRIMARY KEY, pid INTEGER, filename TEXT, size INTEGER, FOREIGN KEY (pid) REFERENCES package(id) ON DELETE CASCADE);
CREATE TABLE hashvalue (id INTEGER PRIMARY KEY, hash TEXT UNIQUE NOT NULL);
CREATE TABLE hash (cid INTEGER, function TEXT, hid INTEGER, FOREIGN KEY (cid) REFERENCES content(id) ON DELETE CASCADE, FOREIGN KEY (hid) REFERENCES hashvalue(id));
CREATE TRIGGER hashvalue_cleanup_trigger AFTER DELETE ON hash FOR EACH ROW BEGIN
DELETE FROM hashvalue WHERE hashvalue.id = old.hid AND NOT EXISTS (SELECT hid FROM hash WHERE hash.hid = old.hid); END;
CREATE TABLE dependency (pid INTEGER, required TEXT, FOREIGN KEY (pid) REFERENCES package(id) ON DELETE CASCADE);
CREATE INDEX content_package_size_index ON content (pid, size);
CREATE INDEX hash_cid_index ON hash (cid);
CREATE INDEX hash_hid_index ON hash (hid);
CREATE TABLE sharing (pid1 INTEGER, pid2 INTEGER, func1 TEXT, func2 TEXT, files INTEGER, size INTEGER, FOREIGN KEY (pid1) REFERENCES package(id) ON DELETE CASCADE, FOREIGN KEY (pid2) REFERENCES package(id) ON DELETE CASCADE);
CREATE INDEX sharing_insert_index ON sharing (pid1, pid2, func1, func2);
CREATE TABLE duplicate (cid INTEGER PRIMARY KEY, FOREIGN KEY (cid) REFERENCES content(id) ON DELETE CASCADE);
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