unique keywords_i18n constraint plus delete duplicates (#320)

2023-04-26 15:09:43 +02:00
parent 4fe3869454
commit 9501af677f
1 changed files with 18 additions and 0 deletions
@@ -0,0 +1,18 @@
 -- Add unique keyword_i18n locale constraint
 -- First we have to delete the duplicates that already exists (keywords 1316-1326; 138 keywords_i18n entries)
 with duplicates as (
 	select duplicate.id duplicate_id, *
 	from keywords_i18n first
 	-- inner join the same table where keyword_id, locale_id AND value must all be the same,
 	-- i.e. only duplicate translations with the same translated value will be included
 	join keywords_i18n duplicate using (keyword_id, locale_id, value)
 	where first.id <> duplicate.id
 	-- only include the last copy, so we dont delete the original
 	and duplicate.id > first.id
 ) delete from keywords_i18n where id in (select duplicate_id from duplicates);
 -- Now we are allowed to add our constraint
 ALTER TABLE keywords_i18n ADD UNIQUE (keyword_id, locale_id);