38 lines
1 KiB
Ruby
38 lines
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 AddIndexOnEventsProjectIdId < ActiveRecord::Migration[4.2]
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include Gitlab::Database::MigrationHelpers
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DOWNTIME = false
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COLUMNS = %i[project_id id].freeze
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TABLES = %i[events events_for_migration].freeze
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disable_ddl_transaction!
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def up
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TABLES.each do |table|
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add_concurrent_index(table, COLUMNS) unless index_exists?(table, COLUMNS)
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# We remove the index _after_ adding the new one since MySQL doesn't let
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# you remove an index when a foreign key exists for the same column.
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if index_exists?(table, :project_id)
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remove_concurrent_index(table, :project_id)
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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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TABLES.each do |table|
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unless index_exists?(table, :project_id)
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add_concurrent_index(table, :project_id)
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end
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unless index_exists?(table, COLUMNS)
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remove_concurrent_index(table, COLUMNS)
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end
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end
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end
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end
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