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SELECT b.rid,
substr(b.uuid,0,8) uuid,
datetime(a.tm,'localtime') time
from blob b, ancestors a
WHERE b.rid=a.rid
</pre></nowiki>
Here's a more refined variant of the above, apply what i learned during
an evening of tinkering with it...
<nowiki><pre>
-- All ancestors (direct or merged!) of the checkin
-- RID given in the first SELECT...
WITH RECURSIVE
-- Change this RID to the RID of the
-- origin for ancestry tracking
theRid(id) AS(
SELECT 3285 as rid -- origin RID
-- SELECT '8f89acc0f05df7bae1e7946efe5324f1e6905a9e' as uuid
),
origin(rid, mtime, cutoffTime) AS(
-- origin RID
SELECT b.rid as rid,
e.mtime as mtime,
(e.mtime - 1.5) as cutoffTime -- Julian days
FROM blob b, event e, theRid
WHERE
b.rid=theRid.id
-- or use the UUID of the origin:
-- b.uuid=theRid.id
AND e.objid=b.rid
),
ancestors(rid,uuid,tm,user,comment) AS (
SELECT b.rid, b.uuid, e.mtime, e.user,
coalesce(e.ecomment,e.comment)
FROM blob b, event e, origin
WHERE b.rid=origin.rid and e.objid=b.rid
UNION
SELECT p.pid, b.uuid, e.mtime, e.user,
coalesce(e.ecomment,e.comment)
FROM plink p, blob b,
ancestors a, event e,
origin
WHERE p.cid=b.rid
AND p.cid=a.rid
AND e.objid=p.pid
-- Only trace back this far in time...
AND e.mtime >= origin.cutoffTime
-- ^^^ if that is removed, also remove origin from the join!
-- Optionally limit it to the first N
-- ancestors (including the original checkin):
-- LIMIT 5
)
SELECT a.rowid, b.rid,
substr(b.uuid,0,8) uuid,
datetime(a.tm,'localtime') time,
user,
substr(comment,0,20)||'...' comment
from blob b, ancestors a
WHERE b.rid=a.rid
;
</pre></nowiki>
<h2>Recursion Example</h2>
See also: [http://www.sqlite.org/draft/lang_with.html]
The following is adapted from a sqlite mailing list post by Petite Abeille on 20140203, not directly applicable to fossil but which is an interesting example nonetheless and which can certainly be used as a model for generating fossil-related data:
|