30 lines
850 B
Ruby
30 lines
850 B
Ruby
# See http://doc.gitlab.com/ce/development/migration_style_guide.html
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# for more information on how to write migrations for GitLab.
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class UsersNameLowerIndex < ActiveRecord::Migration[4.2]
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include Gitlab::Database::MigrationHelpers
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# Set this constant to true if this migration requires downtime.
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DOWNTIME = false
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INDEX_NAME = 'index_on_users_name_lower'
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disable_ddl_transaction!
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def up
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return unless Gitlab::Database.postgresql?
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# On GitLab.com this produces an index with a size of roughly 60 MB.
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execute "CREATE INDEX CONCURRENTLY #{INDEX_NAME} ON users (LOWER(name))"
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end
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def down
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return unless Gitlab::Database.postgresql?
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if supports_drop_index_concurrently?
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execute "DROP INDEX CONCURRENTLY IF EXISTS #{INDEX_NAME}"
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else
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execute "DROP INDEX IF EXISTS #{INDEX_NAME}"
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end
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end
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end
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