41 lines
1.3 KiB
Ruby
41 lines
1.3 KiB
Ruby
class AddIndexesForUserActivityQueries < ActiveRecord::Migration[4.2]
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include Gitlab::Database::MigrationHelpers
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DOWNTIME = false
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disable_ddl_transaction!
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def up
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add_concurrent_index :events, [:author_id, :project_id] unless index_exists?(:events, [:author_id, :project_id])
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add_concurrent_index :user_interacted_projects, :user_id unless index_exists?(:user_interacted_projects, :user_id)
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end
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def down
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remove_concurrent_index :events, [:author_id, :project_id] if index_exists?(:events, [:author_id, :project_id])
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patch_foreign_keys do
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remove_concurrent_index :user_interacted_projects, :user_id if index_exists?(:user_interacted_projects, :user_id)
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end
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end
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private
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def patch_foreign_keys
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return yield if Gitlab::Database.postgresql?
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# MySQL doesn't like to remove the index with a foreign key using it.
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remove_foreign_key :user_interacted_projects, :users if fk_exists?(:user_interacted_projects, :user_id)
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yield
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# Let's re-add the foreign key using the existing index on (user_id, project_id)
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add_concurrent_foreign_key :user_interacted_projects, :users, column: :user_id unless fk_exists?(:user_interacted_projects, :user_id)
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end
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def fk_exists?(table, column)
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foreign_keys(table).any? do |key|
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key.options[:column] == column.to_s
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end
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end
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end
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