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#!/usr/bin/python
import sqlalchemy
from dedup.utils import fetchiter, enable_sqlite_foreign_keys
def add_values(conn, insert_key, files, size):
params = dict(files=files, size=size, pid1=insert_key[0],
pid2=insert_key[1], func1=insert_key[2], func2=insert_key[3])
rows = conn.execute(sqlalchemy.text("UPDATE sharing SET files = files + :files, size = size + :size WHERE pid1 = :pid1 AND pid2 = :pid2 AND func1 = :func1 AND func2 = :func2;"),
**params)
if rows.rowcount > 0:
return
conn.execute(sqlalchemy.text("INSERT INTO sharing (pid1, pid2, func1, func2, files, size) VALUES (:pid1, :pid2, :func1, :func2, :files, :size);"),
**params)
def compute_pkgdict(rows):
pkgdict = dict()
for pid, _, filename, size, function in rows:
funcdict = pkgdict.setdefault(pid, {})
funcdict.setdefault(function, []).append((size, filename))
return pkgdict
def process_pkgdict(conn, pkgdict):
for pid1, funcdict1 in pkgdict.items():
for function1, files in funcdict1.items():
numfiles = len(files)
size = sum(entry[0] for entry in files)
for pid2, funcdict2 in pkgdict.items():
if pid1 == pid2:
pkgnumfiles = numfiles - 1
pkgsize = size - min(entry[0] for entry in files)
if pkgnumfiles == 0:
continue
else:
pkgnumfiles = numfiles
pkgsize = size
for function2 in funcdict2.keys():
insert_key = (pid1, pid2, function1, function2)
add_values(conn, insert_key, pkgnumfiles, pkgsize)
def main():
db = sqlalchemy.create_engine("sqlite:///test.sqlite3")
enable_sqlite_foreign_keys(db)
with db.begin() as conn:
conn.execute("DELETE FROM sharing;")
conn.execute("DELETE FROM duplicate;")
readcur = conn.execute("SELECT hash FROM hash GROUP BY hash HAVING count(*) > 1;")
for hashvalue, in fetchiter(readcur):
rows = conn.execute(sqlalchemy.text("SELECT content.pid, content.id, content.filename, content.size, hash.function FROM hash JOIN content ON hash.cid = content.id WHERE hash = :hashvalue;"),
hashvalue=hashvalue).fetchall()
print("processing hash %s with %d entries" % (hashvalue, len(rows)))
pkgdict = compute_pkgdict(rows)
for row in rows:
cid = row[1]
already = conn.scalar(sqlalchemy.text("SELECT cid FROM duplicate WHERE cid = :cid;"),
cid=cid)
if not already:
conn.execute(sqlalchemy.text("INSERT INTO duplicate (cid) VALUES (:cid);"),
cid=cid)
process_pkgdict(conn, pkgdict)
if __name__ == "__main__":
main()
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