39 lines
1.4 KiB
Ruby
39 lines
1.4 KiB
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 AddPathIndexToRedirectRoutes < 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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disable_ddl_transaction!
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INDEX_NAME = 'index_redirect_routes_on_path_unique_text_pattern_ops'
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# Indexing on LOWER(path) varchar_pattern_ops speeds up the LIKE query in
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# RedirectRoute.matching_path_and_descendants
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#
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# This same index is also added in the `ReworkRedirectRoutesIndexes` so this
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# is a no-op in most cases. But this migration is also called from the
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# `setup_postgresql.rake` task when setting up a new database, in which case
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# we want to create the index.
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def up
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return unless Gitlab::Database.postgresql?
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disable_statement_timeout do
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unless index_exists_by_name?(:redirect_routes, INDEX_NAME)
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execute("CREATE UNIQUE INDEX CONCURRENTLY #{INDEX_NAME} ON redirect_routes (lower(path) varchar_pattern_ops);")
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end
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end
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end
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def down
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# Do nothing in the DOWN. Since the index above is originally created in the
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# `ReworkRedirectRoutesIndexes`. This migration wouldn't have actually
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# created any new index.
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#
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# This migration is only here to be called form `setup_postgresql.rake` so
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# any newly created database would have this index.
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end
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end
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