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add prefix index on tags (#3858)

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Albert Yi
2018-09-12 14:01:21 -07:00
parent f487b2a2c6
commit 8c564f055f
3 changed files with 16 additions and 3 deletions
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5
db/migrate/20180912185624_add_prefixes_to_tags.rb Normal file
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class AddPrefixesToTags < ActiveRecord::Migration[5.2]
def change
execute "CREATE INDEX index_tags_on_name_prefix ON tags USING gin (REGEXP_REPLACE(name, '([a-z0-9])[a-z0-9'']*($|[^a-z0-9'']+)', '\1', 'g') gin_trgm_ops) WHERE post_count > 0"
end
end