22 lines
656 B
Ruby
22 lines
656 B
Ruby
class AddPartialIndexToProjectsForIndexOnlyScans < 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_projects_on_id_partial_for_visibility'
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disable_ddl_transaction!
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# Adds a partial index to leverage index-only scans when looking up project ids
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def up
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unless index_exists?(:projects, :id, name: INDEX_NAME)
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add_concurrent_index :projects, :id, name: INDEX_NAME, unique: true, where: 'visibility_level IN (10,20)'
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end
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end
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def down
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if index_exists?(:projects, :id, name: INDEX_NAME)
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remove_concurrent_index_by_name :projects, INDEX_NAME
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end
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end
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end
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