[development] Writing updates for minor releases
karoly at negyesi.net
Wed Oct 4 07:43:50 UTC 2006
I closed http://drupal.org/node/64212 for good.
To sum up, if you are writing a core patch which adds an update to a minor
release, then you need to duplicate that in the HEAD section (which has a
different numbering) and do it in such a way that the second update won't
generate an error.
To achieve this, use DROP IF EXSITS for indexes (both databases), in the
unlikely case you are adding a field, check for its existence first
through SELECT * FROM, db_fetch_array, isset. ALTERs need no special
taking care of.
I do not think there will be a very complex update in a minor revision
ever but if there will be, we can solve that when the need arrives. Note
that the above did not divulge into introspection which is available for
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