nupplaPhil/friendica
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

Merge pull request #9913 from VVelox/develop

Browse source 
Document current known foreign key fixes possibly required post upgrading
This commit is contained in:
Hypolite Petovan 2021-02-07 22:01:07 -05:00 committed by GitHub
parent 0fe37b123a 48ebb4b731
commit dd8909ad95
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 26 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

26
doc/Update.md
View file

@ -77,3 +77,29 @@ RENAME TABLE <table_name>_new TO <table_name>;
```
This method is slower overall, but it is better suited for large numbers of duplicates.
### Resolving Possible Database Issues Post Upgrading
#### Foreign Keys
Some of the updates include the use of foreign keys now that will bump into issues with previous versions, which would sometimes shove bad data into tables, preventing, causing errors such as below.
```
Error 1452 occurred during database update:
Cannot add or update a child row: a foreign key constraint fails (`friendica`.`#sql-10ea6_5a6d`, CONSTRAINT `#sql-10ea6_5a6d_ibfk_1` FOREIGN KEY (`contact-id`) REFERENCES `contact` (`id`))
ALTER TABLE `thread` ADD FOREIGN KEY (`iid`) REFERENCES `item` (`id`) ON UPDATE RESTRICT ON DELETE CASCADE;
```
All current known fixes for possible items that can go wrong are as below.
```SQL
DELETE FROM `item` WHERE `owner-id` NOT IN (SELECT `id` FROM `contact`);
DELETE FROM `item` WHERE `contact-id` NOT IN (SELECT `id` FROM `contact`);
DELETE FROM `notify` WHERE `uri-id` NOT IN (SELECT `id` FROM `item-uri`);
DELETE FROM `photo` WHERE `contact-id` NOT IN (SELECT `id` FROM `contact`);
DELETE FROM `thread` WHERE `iid` NOT IN (SELECT `id` FROM `item`);
DELETE FROM `item` WHERE `author-id` NOT IN (SELECT `id` FROM `contact`);
DELETE FROM `diaspora-interaction` WHERE `uri-id` NOT IN (SELECT `id` FROM `item-uri`);
```
This all has been compiled as of currently from issue #9746, #9753, and #9878.