46 lines
1.7 KiB
Ruby
46 lines
1.7 KiB
Ruby
#
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# Copyright (C) 2011 - present Instructure, Inc.
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#
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# This file is part of Canvas.
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#
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# Canvas is free software: you can redistribute it and/or modify it under
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# the terms of the GNU Affero General Public License as published by the Free
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# Software Foundation, version 3 of the License.
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#
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# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Affero General Public License along
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# with this program. If not, see <http://www.gnu.org/licenses/>.
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class CleanupDelayedJobsIndexes < ActiveRecord::Migration[4.2]
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tag :predeploy
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def self.connection
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Delayed::Backend::ActiveRecord::Job.connection
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end
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def self.up
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case connection.adapter_name
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when 'PostgreSQL'
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# "nulls first" syntax is postgresql specific, and allows for more
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# efficient querying for the next job
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connection.execute("CREATE INDEX get_delayed_jobs_index ON #{Delayed::Backend::ActiveRecord::Job.quoted_table_name} (priority, run_at, failed_at nulls first, locked_at nulls first, queue)")
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else
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add_index :delayed_jobs, %w(priority run_at locked_at failed_at queue), :name => 'get_delayed_jobs_index'
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end
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# unused indexes
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remove_index :delayed_jobs, :name => 'delayed_jobs_queue'
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remove_index :delayed_jobs, :name => 'delayed_jobs_priority'
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end
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def self.down
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remove_index :delayed_jobs, :name => 'get_delayed_jobs_index'
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add_index :delayed_jobs, [:priority, :run_at], :name => 'delayed_jobs_priority'
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add_index :delayed_jobs, [:queue], :name => 'delayed_jobs_queue'
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end
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end
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