36 lines
1.1 KiB
Ruby
36 lines
1.1 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 AddLowerPathIndexToRedirectRoutes < ActiveRecord::Migration[4.2]
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include Gitlab::Database::MigrationHelpers
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DOWNTIME = false
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INDEX_NAME = 'index_on_redirect_routes_lower_path'
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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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execute "CREATE INDEX CONCURRENTLY #{INDEX_NAME} ON redirect_routes (LOWER(path));"
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end
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def down
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return unless Gitlab::Database.postgresql?
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# Why not use remove_concurrent_index_by_name?
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#
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# `index_exists?` doesn't work on this index. Perhaps this is related to the
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# fact that the index doesn't show up in the schema. And apparently it isn't
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# trivial to write a query that checks for an index. BUT there is a
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# convenient `IF EXISTS` parameter for `DROP INDEX`.
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if supports_drop_index_concurrently?
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disable_statement_timeout do
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execute "DROP INDEX CONCURRENTLY IF EXISTS #{INDEX_NAME};"
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end
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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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