20180305100050_remove_permanent_from_redirect_routes.rb 1.25 KB
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# See http://doc.gitlab.com/ce/development/migration_style_guide.html
# for more information on how to write migrations for GitLab.

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class RemovePermanentFromRedirectRoutes < ActiveRecord::Migration[4.2]
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  include Gitlab::Database::MigrationHelpers

  DOWNTIME = false
  disable_ddl_transaction!

  INDEX_NAME_PERM = "index_redirect_routes_on_path_text_pattern_ops_where_permanent"
  INDEX_NAME_TEMP = "index_redirect_routes_on_path_text_pattern_ops_where_temporary"

  def up
    # These indexes were created on Postgres only in:
    # ReworkRedirectRoutesIndexes:
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    # https://gitlab.com/gitlab-org/gitlab-foss/merge_requests/16211
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    disable_statement_timeout do
      execute "DROP INDEX CONCURRENTLY IF EXISTS #{INDEX_NAME_PERM};"
      execute "DROP INDEX CONCURRENTLY IF EXISTS #{INDEX_NAME_TEMP};"
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    end

    remove_column(:redirect_routes, :permanent)
  end

  def down
    add_column(:redirect_routes, :permanent, :boolean)

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    disable_statement_timeout do
      execute("CREATE INDEX CONCURRENTLY #{INDEX_NAME_PERM} ON redirect_routes (lower(path) varchar_pattern_ops) where (permanent);")
      execute("CREATE INDEX CONCURRENTLY #{INDEX_NAME_TEMP} ON redirect_routes (lower(path) varchar_pattern_ops) where (not permanent or permanent is null) ;")
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    end
  end
end