Am 10.03.2012 09:06, schrieb Kit:
2012/3/9 Christoph P.U. Kukulies<k...@kukulies.org>:
CREATE TABLE instance (
path TEXT,
basename TEXT,
size INT,
md5sum TEXT,
creation_date TEXT,
last_write_time TEXT,
FOREIGN KEY (md5sum) REFERENCES resource (md5sum)
);
CREATE TABLE resource (
md5sum TEXT,
data BLOB,
primary key(md5sum)
);
What makes the contents of two files equal (so that their contents can be
represented by the same resource) ?
md5sum = md5sum
My problem: what do I have to change in TABLE instance so that I can use it
to determine whether the key is already
in the resource TABLE?
- Make new md5sum from new data
INSERT OR IGNORE INTO resource ...
INSERT OR REPLACE INTO instance ...
Thanks a lot. What is the idea behind the INSERT OR REPLACE in your
solution?
--
Christoph
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