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Original file line number | Diff line number | Diff line change |
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CREATE OR REPLACE FUNCTION prune_tags() | ||
RETURNS TRIGGER AS $$ | ||
BEGIN | ||
DELETE FROM tags | ||
WHERE id IN ( | ||
SELECT id FROM tags | ||
LEFT OUTER JOIN bookmarks_tags on tags.id = bookmarks_tags.tag_id | ||
WHERE bookmarks_tags.tag_id is null | ||
); | ||
RETURN NEW; | ||
END; | ||
$$ LANGUAGE plpgsql; |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,17 @@ | ||
CREATE OR REPLACE FUNCTION prune_tags() | ||
RETURNS TRIGGER AS $$ | ||
BEGIN | ||
DELETE FROM tags | ||
WHERE id IN ( | ||
SELECT id FROM tags | ||
LEFT OUTER JOIN bookmarks_tags on tags.id = bookmarks_tags.tag_id | ||
WHERE bookmarks_tags.tag_id is null | ||
AND owner_id in ( | ||
SELECT owner_id | ||
FROM tags | ||
WHERE id = OLD.tag_id | ||
) | ||
); | ||
RETURN NEW; | ||
END; | ||
$$ LANGUAGE plpgsql; |
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