19 lines
794 B
SQL
19 lines
794 B
SQL
-- Add unique keyword_i18n locale constraint
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-- First we have to delete the duplicates that already exists (keywords 1316-1326; 138 keywords_i18n entries)
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with duplicates as (
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select duplicate.id duplicate_id, *
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from keywords_i18n first
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-- inner join the same table where keyword_id, locale_id AND value must all be the same,
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-- i.e. only duplicate translations with the same translated value will be included
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join keywords_i18n duplicate using (keyword_id, locale_id, value)
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where first.id <> duplicate.id
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-- only include the last copy, so we dont delete the original
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and duplicate.id > first.id
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) delete from keywords_i18n where id in (select duplicate_id from duplicates);
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-- Now we are allowed to add our constraint
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ALTER TABLE keywords_i18n ADD UNIQUE (keyword_id, locale_id);
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