18 lines
565 B
Ruby
18 lines
565 B
Ruby
class AddIndexToSystemNoteMetadata < ActiveRecord::Migration[4.2]
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include Gitlab::Database::MigrationHelpers
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# Set this constant to true if this migration requires downtime.
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DOWNTIME = false
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disable_ddl_transaction!
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def up
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# MySQL automatically creates an index on a foreign-key constraint; PostgreSQL does not
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add_concurrent_index :system_note_metadata, :note_id, unique: true if Gitlab::Database.postgresql?
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end
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def down
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remove_concurrent_index :system_note_metadata, :note_id, unique: true if Gitlab::Database.postgresql?
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end
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end
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