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There were 11 main types of changes:
- UPDATE's and DELETE's sometimes had LIMIT 1 at the end of them. This is not only non-compliant but
it would certainly not do what whoever wrote it thought it would. It is likely this mistake was just
copied from Friendica. All of these instances, the LIMIT 1 was simply removed.
- Bitwise operations (and even some non-zero int checks) erroneously rely on MySQL implicit
integer-boolean conversion in the WHERE clauses. This is non-compliant (and bad programming practice
to boot). Proper explicit boolean conversions were added. New queries should use proper conventions.
- MySQL has a different operator for bitwise XOR than postgres. Rather than add yet another dba_
func, I converted them to "& ~" ("AND NOT") when turning off, and "|" ("OR") when turning on. There
were no true toggles (XOR). New queries should refrain from using XOR when not necessary.
- There are several fields which the schema has marked as NOT NULL, but the inserts don't specify
them. The reason this works is because mysql totally ignores the constraint and adds an empty text
default automatically. Again, non-compliant, obviously. In these cases a default of empty text was
added.
- Several statements rely on a non-standard MySQL feature
(http://dev.mysql.com/doc/refman/5.5/en/group-by-handling.html). These queries can all be rewritten
to be standards compliant. Interestingly enough, the newly rewritten standards compliant queries run
a zillion times faster, even on MySQL.
- A couple of function/operator name translations were needed (RAND/RANDOM, GROUP_CONCAT/STRING_AGG,
UTC_NOW, REGEXP/~, ^/#) -- assist functions added in the dba_
- INTERVALs: postgres requires quotes around the value, mysql requires that there are not quotes
around the value -- assist functions added in the dba_
- NULL_DATE's -- Postgres does not allow the invalid date '0000-00-00 00:00:00' (there is no such
thing as year 0 or month 0 or day 0). We use '0001-01-01 00:00:00' for postgres. Conversions are
handled in Zot/item packets automagically by quoting all dates with dbescdate().
- char(##) specifications in the schema creates fields with blank spaces that aren't trimmed in the
code. MySQL apparently treats char(##) as varchar(##), again, non-compliant. Since postgres works
better with text fields anyway, this ball of bugs was simply side-stepped by using 'text' datatype
for all text fields in the postgres schema. varchar was used in a couple of places where it actually
seemed appropriate (size constraint), but without rigorously vetting that all of the PHP code
actually validates data, new bugs might come out from under the rug.
- postgres doesn't store nul bytes and a few other non-printables in text fields, even when quoted.
bytea fields were used when storing binary data (photo.data, attach.data). A new dbescbin() function
was added to handle this transparently.
- postgres does not support LIMIT #,# syntax. All databases support LIMIT # OFFSET # syntax.
Statements were updated to be standard.
These changes require corresponding changes in the coding standards. Please review those before
adding any code going forward.
Still on my TODO list:
- remove quotes from non-reserved identifiers and make reserved identifiers use dba func for quoting
- Rewrite search queries for better results (both MySQL and Postgres)
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This reverts commit f84453497bd5ef4eba8bca84917b8e82d784937a.
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important here, but let's make sure we have the right driver installed if we do something else with photos afterward.
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friendica photo import
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uploading)
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out but their profile photo will remain rainbow man (or the site default). However the photo_date has been updated so we won't try again. This checkin looks for such a failure and leaves the photo_date alone if the photo import failed.
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need to have a filename to export via DAV or API and the original filename would be the most likely choice).
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images but may result in cropping important parts of the picture. Still this will work well for 95 out of 100 cases. If the width exceeds the height by greater than 1.2 we will remove an equal margin from either side of the photo leaving the center intact. If the height exceeds the width we will chop off the bottom to make it square. This is good for most single person photographs, unless the object of interest is off-center horizontally in a wide photo - or one is trying to emphasize aspects of human anatomy which may be at the bottom of a tall photo.
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issues with duplicate notifications and contact photos not getting an album name (it was crossed with filename). The last one doesn't matter as neither is used, but it was wrong so it has been corrected. Oh and thing photos weren't working at all because the form element name was different than what the module was looking for. But that had never been tested as I was waiting to get the import/resize finished. Next up for that module is display and deletion of things; but the priority is pretty low.
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admin ui
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selectable. Also red != friendica so we don't need all these friendica logos taking up space
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instead of a list of args. Also the beginning of the migration to using photo_flags to indicate special purpose photos such as profile photos and contact photos and "thing" photos.
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instead of photo_factory()
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